JP2002157216A - Plant controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the rate of operation of a plant controller provided with an initiator substrate for transmitting data on a common bus as a bus master connected to the common bus, a master substrate capable of becoming a bus master for controlling the bus and a target substrate capable of being accessed from the bus master. SOLUTION: Reference time set for each of master substrate and target substrate by a setting means (circuit for latency timer time setting) provided inside the initiator substrate for setting the reference value of the inputted to a time measuring means (latency timer circuit) for each bus cycle. Thus, the bus cycle is monitored by suitable reference time (latency) by control and data transfer load peculiar for the master substrate and target substrate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a Compact PCI (Peripheral Components Interc.)
onect System) and a plant control device using a common bus.

[0002]

2. Description of the Related Art Conventionally, a plant control device to which Compact PCI is applied is a center of the plant control device as shown in FIG. 14, and an initiator board which serves as a bus master for data transmission on Compact PCI in the plant control device. (Hereinafter referred to as “initiator”) 1, a kind of input / output device of the plant control device, and a Compact PC with the permission of the initiator.
A plurality of master boards (hereinafter, masters) 2, 2 'that can be I bus masters, and a plurality of target boards (hereinafter, target), which are a kind of input / output device of a plant control device and always serve as a Compact PCI bus target. )
3, 3 'and the PC which is a common bus connecting them
It is configured by I bus 0. Hereinafter, a plurality of masters 2,
The 2 ′ and the plurality of targets 3 and 3 ′ may be collectively simply referred to as the master 2 and the target 3.

[0003] The initiator 1 has a control operation unit 1 a for performing control operation of a plant control device. When the initiator accesses the master 2 and the target 3, the Compact PCI
A latency timer circuit 1b for monitoring the latency (access latency) until the first data is transferred and the first data is transferred, and a bus master permission is issued in response to a PCI bus 0 use request from a plurality of masters 2. An arbitration circulating circuit 1c for arbitration, an interrupt router circuit 1d for arbitrating an interrupt (interrupt) notified from each master and target to the initiator 1 via the PCI bus 0, and a Compact for controlling the PCI bus 0 P
It is composed of a CI interface circuit 1e.

The master 2 includes a local bus master 2a which is a bus master in the master 2, a random access memory (hereinafter, memory) 2b used by the local bus master 2a, and a read only memory (hereinafter, RO).
M) 2c, a hot swap circuit 2d for inserting and removing a board with the power supply in a hot-plug state, a local bus control circuit 2e for controlling a local bus, and a PCI bus 0 for the initiator 1.
Arbitration request circuit 2 for requesting use of
f, a target access control circuit 2g for controlling access to the target 3 after arbitration, an interrupt request circuit 2h for requesting an interrupt to the initiator 1, and a Compact PCI for controlling the PCI bus 0
It is composed of an interface circuit 2i.

The target 3 is a local bus master 3a which is a bus master in the target 3, a random access memory (hereinafter, memory) 3b and a read only memory (hereinafter, ROM) used by the local bus master.
3c, a hot swap circuit 3d for inserting and removing a board with the power supply in a hot-plug state, a local bus control circuit 3e for controlling a local bus, an interrupt request circuit 3f for requesting the initiator 1 for an interrupt, and a PCI bus 0
Is configured by a Compact PCI interface circuit 3f that performs the above control.

In the conventional plant control apparatus shown in FIG. 14, the following control is performed. First, when the initiator 1 accesses the master 2 or the target 3 via the PCI bus 0, the time from the start of the Compact PCI bus cycle to the transfer of the first data, that is, the monitoring of the access latency is determined by the access latency timer circuit. This is performed by the fixed timer time set in 1b. If there is no response even if the set timer time is exceeded, the access is suspended as a latency timeout in order to avoid occupying the PCI bus 0 for a long time.

Further, in the Compact PCI system, no algorithm is specified when a plurality of masters simultaneously request arbitration. Therefore, generally, a plurality of masters 2 are connected to the PCI bus 0, and when the master 2 accesses the target 3 or another master, the master 2 sends the PCI bus to the initiator 1 by the arbitration request circuit 2f. 0, and the initiator 1 responds to the arbitration request from each master 2 by the arbitration circulating circuit 1.
The right to use the bus is arbitrated according to the fixed priority determined in step c, and the result is notified to each master 2.

In the interrupt router used in the Compact PCI, four interrupt lines in the PCI bus 0 are input to an interrupt controller (not shown) with a fixed priority. For this reason, when the master 2 and the target 3 use the interrupt line of the PCI bus 0 to notify the initiator 1 of a failure interrupt, a data transmission completion interrupt, a data reception interrupt, and the like, the master 2 and the target 3 use the interrupt lines. When a factor occurs, an interrupt is notified to the initiator 1 by the interrupt request circuits 2h and 3f. When an interrupt from a plurality of boards occurs on a certain interrupt line, the notified initiator 1 sequentially accesses all the boards (slots) connected to the interrupt line to determine whether the interrupt request status is being issued. Check whether the interrupt request comes from which board (slot). Then, based on the confirmation result, the initiator 1 sets the interrupt router circuit 1d
, Each interrupt is processed based on a fixed interrupt priority determined for each slot.

[0009] In the Compact PCI system, a protocol relating to hot swap is not specified. Therefore, when the master 2 or the target 3 is inserted or removed with the power supply in the hot-plug state, the hot swap is simply performed to the local bus masters 2a, 3a by using the hot swap circuits 2d, 3d of the master 2 or the target 3. After the control and the transmission of the master 2 or the target 3 are interrupted by the notification, the hot swap is performed.

When the initiator 1 accesses the master 2 or the target 3 or when the master 2 accesses the target 3, since there is one bus master in one Compact PCI bus cycle, the other initiator or the master 3 Accessed after confirming that PCI bus 0 was not used.

When the initiator 1 fails, the master 2 and the target 3 cannot become initiators. Therefore, the plant control device is stopped and the initiator 1 is replaced with a normal board.

Also, the network control board is a Compact PC
I If mounted, when the status of the network link changes due to disconnection and disconnection of the cable connected to the network control board, the initiator 1
Alternatively, the master 2 accesses the network control board via the PCI bus 0, detects that access is impossible, and determines a network link error.

[0013]

However, when the initiator 1 accesses the master 2 and the target 3 via the PCI bus 0, since the timer time of the latency timer circuit 1b of the initiator 1 is fixed, the normal master 2 And even target 3
Depending on the control or transmission load of the master 2 and the target 3 at that time, the master 2 and the target 3
In some cases, it was not possible to respond to the access from the initiator 1 via the I bus 0, and a latency timeout occurred in the initiator 1, and the access was sometimes stopped. For this reason, the real-time property is lacking, and the operation rate of the plant control device is reduced because the plant control device is stopped in some systems.

When the master 2 becomes a Compact PCI bus master by arbitration and accesses the target 3, the arbitration priority of the arbitration circuit 1 c of the initiator 1 is fixed. The data transmission amount and transmission load of a certain Compact PCI are not reflected, and the fairness of arbitration is lost.
In some cases, I lost the right to acquire the right of the bus master and canceled access. Because of this, lack of real-time
Further, depending on the system, the operation rate of the plant control device was reduced because the plant control device was stopped.

Further, in the Compact PCI system, an algorithm when arbitration is requested from a plurality of masters is not specified. In general, a cyclic priority algorithm is often employed, but a Compact PC unique to the master 2 and the target 3 is used.
In some cases, fairness was lost because the amount of data transmission and transmission load were not reflected. For this reason, since the real-time property was lacking, the operation rate of the plant control device was reduced.

When the master 2 or the target 3 notifies the initiator 1 of a failure interrupt, a data transmission completion interrupt, a data reception interrupt, etc., the notified initiator 1 is determined for each slot by the interrupt router circuit 1d. Since each interrupt is processed based on the fixed interrupt priority, the data transmission amount and transmission load of the Compact PCI, which are the unique values of the master 2 and the target 3, are not reflected, and the fairness of the interrupt is lost. Due to lack of real-time processing, the operation rate of the plant control device was reduced.

When the master 2 or the target 3 is inserted / removed with the power supply in the hot-plug state, the hot swap circuits 2d, 3d notify the local bus masters 2a, 3a of the hot swap, so that the master 2 or the target 3 is simply inserted.
Alternatively, hot swap was performed only by interrupting the control and transmission of the target 3. For this reason, the initiator 1 or another master accesses the board in spite of being hot-swapping. However, since the target board is not mounted, access becomes impossible. As a result, the operation rate of the plant control device was reduced.

When the initiator 1 accesses the master 2 or the target 3, or when the master 2 accesses the target 3, there is only one bus master in one bus cycle of Compact PCI. Accessed after confirming that PCI bus 0 was not used. For this reason,
When data must be transferred at a high speed, the access sometimes stagnates. For this reason, since the real-time property was lacking, the operation rate of the plant control device was reduced.

When the initiator 1 which is the center of the plant control device fails, the master 2 and the target 3
Cannot have the function of an initiator, the plant control device is stopped, and the initiator 1 is replaced with a normal substrate. For this reason, the operation rate of the plant control device has been reduced.

When a network control board is mounted as the master 2 or the target 3, it is determined whether or not the cable connected to the network control board can enter the network due to disconnection or disconnection. When a state change occurs in the network link for the purpose, the initiator 1 or the master 2 accesses the network control board to determine the network link abnormality. For this reason, depending on the system, another master accesses the network control board and stops the plant control device by detecting an abnormality, so that the operation rate of the plant control device is reduced.

Accordingly, an object of the present invention is to provide a plant control apparatus in which the operation rate is improved without stopping the apparatus during plant control, in view of the problems of the conventional plant apparatus.

[0022]

According to a first aspect of the present invention, there is provided an apparatus for controlling a plant, comprising an arbitration unit connected to a common bus, arbitrating the bus, and serving as a bus master for controlling data transmission on the common bus. And one or more master boards that can be a bus master that controls the bus by the arbitration means, and one or more target boards that can be accessed from the bus master, and perform plant control for controlling the plant. In the apparatus, in the initiator board, time measuring means for measuring a time from the start of a bus cycle to the start of transfer of first data, and setting means for setting a reference value of the time for each of the master board or the target board Means for detecting that the time measured by the time measuring means has exceeded the reference value; Comprising a, characterized in that to cancel the access, if it exceeds the reference value.

According to the first aspect of the present invention, the reference time set for each master substrate and the target substrate by the setting means (latency timer time setting circuit) for setting the reference value of the time provided in the initiator substrate. (Latency timer time) is input to the time measuring means (latency timer circuit) for each bus cycle. As a result, the bus cycle is monitored at an appropriate reference time (latency) according to the control and data transfer load unique to each master substrate and target substrate.

The initiator substrate may have both a master function and a target function in each of the present inventions.

According to a second aspect of the present invention, there is provided a plant control apparatus including an arbitration unit connected to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and the arbitration unit. In a plant control apparatus configured to include one or more master boards that can be a bus master that controls the bus and one or more target boards that can be accessed from the bus master and control a plant, the initiator board Wherein the arbitration means includes means for setting a maximum data transmission amount for each master board, and priority determination means for determining a priority order of bus use permission based on the maximum data transmission amount, I do.

In the plant control apparatus according to the second aspect, the maximum data transmission amount of each master substrate and the target substrate is set by the means for setting the maximum data transmission amount provided in the initiator substrate, and the maximum data transmission amount is set based on the maximum data transmission amount. The priority of the determined arbitration is input to the priority determining means. As a result, the arbitration priority is appropriately determined based on the maximum data transmission amount specific to the master board and the target board related to the load on the common bus.

According to a third aspect of the present invention, there is provided a plant control apparatus including an arbitration unit connected to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and the arbitration unit. In a plant control apparatus configured to include one or more master boards that can be a bus master that controls the bus and one or more target boards that can be accessed from the bus master and control a plant, the initiator board Wherein, as the arbitration means, arbitration number counting means for counting the number of times permitted as a bus master by the arbitration, and priority order determination means for determining the priority of bus use permission based on the number of times. Features.

In the plant control apparatus according to the third aspect, the number of times each master board has become a bus master by the arbitration is counted by the arbitration number counting means provided in the initiator board, and the arbitration determined by the count value is performed. The priority is input to the priority determining means. Thus, an appropriate arbitration priority is determined based on the number of arbitrations of each master board related to the load on the common bus.

According to a fourth aspect of the present invention, there is provided a plant control apparatus including an arbitration unit connected to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and the arbitration unit. In a plant control apparatus configured to include one or more master boards that can be a bus master that controls the bus and one or more target boards that can be accessed from the bus master and control a plant, the initiator board Inside, an interrupt arbitration unit for arbitrating an interrupt from the master substrate and the target substrate to the initiator substrate, a unit for detecting a mounting position of the substrate that generated the interrupt request, and a unit for setting a type of the substrate The interrupt arbitration means is provided depending on the type of the board or the mounting position of the board. And determines the interrupt priorities.

In the plant control apparatus according to the fourth aspect, the means (slot detection circuit) for detecting the mounting position of the board provided in the initiator board and the means for setting the type of the board (board type setting circuit) are interrupted ( The mounting slot and the board type of the master board and the target board that have notified the interrupt are set, and the interrupt priority is determined based on the mounting slot and the board type. Thus, an appropriate interrupt priority is determined according to the type of each of the master substrate and the target substrate related to the control load.

According to a fifth aspect of the present invention, there is provided a plant control apparatus including an arbitration means for connecting to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and the arbitration means. In a plant control apparatus configured to include one or more master boards that can be a bus master that controls the bus and one or more target boards that can be accessed from the bus master and control a plant, the initiator board Within, a hot-plug insertion / removal detecting means for detecting that the master substrate or the target substrate is being inserted / removed in a power-supply hot-plug state, and an access for setting access prohibition to the master substrate for any substrate connected to the bus. Prohibition setting means. And sets the access prohibition to the substrate during the stopcock insertion to all the master substrate connected to said bus by said access inhibit setting means upon detection of a.

In the plant control apparatus according to the fifth aspect, the mounting position (slot) information of the master board or the target board during hot swapping (hot swap) by the hot swap detection means (hot swap detection circuit) provided in the initiator board. Is detected and input to the access prohibition setting means (access lock setting circuit). As a result, the slot being hot swapped is detected, and the access lock for the slot being hot swapped is performed by the common bus lock function.

According to a sixth aspect of the present invention, there is provided a plant control apparatus including an arbitration means connected to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and the arbitration means. In a plant control apparatus configured to include one or more master boards that can be a bus master that controls the bus and one or more target boards that can be accessed from the bus master and control a plant, the initiator board Inside, a hot-plug insertion / extraction detecting means for detecting that the master substrate or the target substrate is being inserted / extracted in the state of a power-supply hot-plug, and all means connected to the bus when detecting that the live / cypress insertion / removal is being performed by this means. Mounting position notifying means for notifying the mounting position information of the board in the stopcock to the master board; Within the master substrate, characterized by comprising a means for inhibiting access to the substrate of the mounting position by the mounting position information.

According to the plant control apparatus of the present invention, the hot swapping detection means (hot swap detection circuit) provided in the initiator board detects the slot of the master board or the target board which is being hot swapped. It is input to the means for prohibiting access to the board provided (access prohibition slot setting circuit). This notifies all the master boards of the slot being hot swapped, thereby prohibiting access to that slot.

According to a seventh aspect of the present invention, there is provided a plant control device including an arbitration unit connected to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and the arbitration unit. In a plant control device configured to include one or more master substrates that can be a bus master that controls the bus and one or more target substrates that can be accessed from the bus master and control a plant, the master substrate And an access rejection setting means for rejecting access from the initiator substrate to a required substrate of the target substrate.

In the plant control device of the present invention, the access rejection is set in the access rejection setting means (access rejection setting circuit) provided in the master substrate and the target substrate. Accordingly, access from the initiator board via the common bus is prohibited by the control of the master board and the target board and the transmission load.

The plant control device according to claim 8 includes arbitration means for connecting to the common first bus and arbitrating the first bus, and performs data transmission on the common first bus as a bus master. And a master board that can be a bus master that controls the common first bus by the arbitration means, and one or more target boards that can be accessed from the bus master. In a plant control device for controlling a plant, a common second bus is provided, and at least one of the initiator board, the master board, and the target board is connected to the second bus,
A bus busy flag setting means for setting the required bus of the initiator board and the master board when the second bus is used, and detecting that another master board has set the bus busy flag. And a bus busy detecting means.

In the plant control apparatus according to the present invention, the common bus busy flag set by the bus busy flag setting circuit provided in the initiator board and the master board is used for the other master board and the initiator board. It is input to the bus busy detecting means (bus busy detecting circuit). Thus, even when the initiator board or another master board uses the common first bus, data transmission is performed using the local common second bus.

A plant control device according to a ninth aspect includes a first arbitration means connected to a common bus and arbitrating the bus, and a first initiator board for controlling data transmission on the bus as a bus master; The first arbitration means 1 or 2 that can be a bus master controlling the bus
In a plant control device configured to include the master substrate and one or more target substrates that can be accessed from the bus master and control the plant,
A second arbitration unit connected to the bus and arbitrating the bus, and a multiplexing data storage unit for storing multiplexing control data for redundantly configuring the initiator; and
A second initiator board which can be the bus master by the first arbitration means of the first initiator board, or which can be accessed from the bus master, wherein the first initiator board is the second initiator board; The multiplexing control data is periodically written into the multiplexing data storage means.

In the plant control apparatus according to the ninth aspect, the multiplexing data storage means (duplication data storage circuit) of the second initiator substrate having both master and target functions includes one first initiator substrate. Input control data to be input / output for each control cycle. This allows
The second initiator board having both the master and target functions takes over the control for each control cycle, and makes the initiator redundant.

A plant control apparatus according to a tenth aspect includes first arbitration means connected to a common bus and arbitrating the bus, a first initiator board serving as a bus master for controlling data transmission on the bus, A plant that includes one or more master boards that can be a bus master that controls the bus by the first arbitration means, and one or more target boards that can be accessed from the bus master, and controls the plant In the control device,
A second arbitration unit connected to the bus for arbitrating the bus, and a control cycle time management unit for periodically outputting an arbitration request to the first initiator board;
And a second initiator board which can be the bus master by the first arbitration means of the initiator board.

[0042] In the plant control apparatus of the tenth aspect,
The second arbitration means (arbitration control circuit) is activated for each control cycle by the control cycle time management means (control cycle timer circuit) of the second initiator board having both functions of the master and the target, and To the first arbitration means (arbitration priority order circuit) provided in. As a result, the second initiator board having both the master and target functions takes over the control for each control cycle, and makes the initiator redundant.

[0043] The plant control apparatus according to claim 11 includes arbitration means for connecting to a common bus and arbitrating the bus.
An initiator board that manages data transmission on the common bus as a bus master, one or more master boards that can be bus masters controlling the bus by this arbitration means, and one or more master boards that can be accessed from the bus master In a plant control device configured to include a target substrate and control a plant, at least one of the master substrate and the target substrate is a communication substrate that performs communication for connecting the plant control devices. The board has a link monitoring means for monitoring the link state of communication, and when detecting a change in the link state, notifying the link state to all master boards except for the communication board. Access prohibition setting means for prohibiting access to a board mounted at a specific position When the communication board cannot communicate with another plant control device, the access prohibition setting means of the other control board is set to prohibit access to the communication board, and when communication is possible, the access prohibition setting means is prohibited. Is canceled.

In the plant control device according to the eleventh aspect,
The change in the state of the network link is input to the access prohibition setting means (access prohibition slot setting circuit) provided on all master boards by the link monitoring means (network link state change detection circuit) in the network control board. Thus, when the network link becomes abnormal, the initiator board and all master boards are prohibited from accessing the network control board, and when the network link becomes normal, access is allowed.

[0045]

Embodiments of the present invention will be described below with reference to the drawings. The case where the plant control device of the present invention is applied to Compact PCI will be described. However, the present invention is not limited to this and can be applied to a general common bus system.

[Claim 1] FIG. 1 is a diagram showing a configuration of a plant control apparatus according to a first embodiment of the present invention.
In the following embodiments, an initiator substrate, a master substrate, and a target substrate are referred to as an initiator, a master, and a target, respectively, and a plurality of masters 2, 2 'and a plurality of targets 3, 3' are collectively referred to. There are simply Master 2 and Target 3.

In FIG. 1, a latency timer time setting circuit 1f is provided in an initiator 1 of a plant control device to which Compact PCI is applied. The other block configuration is the same as that of the conventional FIG.

In the first embodiment shown in FIG.
A circuit 1f for setting a latency timer time is provided in the initiator 1 of the plant control device to which the Compact PCI0 is applied, and control unique to the master 2 or the target 3 is performed.
It has a function that can vary the access latency according to the data transfer load.

The master 2 and the target 3 notify the initiator 1 of the latency timer time according to their own control or transmission load. The initiator 1 detects the latency timer times of the master 2 and the target 3, respectively, and sets a latency timer time setting circuit 1
f is set for each of master 2 and target 3.

Then, if the initiator 1 is a master 2
Alternatively, every time the target 3 is accessed, the latency timer time set for the master 2 or the target 3 is input from the latency timer time setting circuit 1f to the access latency timer circuit 1b.

For example, if the load on the master 2 is heavy and the latency is 1 ms, and the load on the target 3 is light and the latency is 1 μs, the initiator 1 accesses the master 2 when accessing the master 2. The latency time of master 2 is read by time setting circuit 1f, and Compact PCI
Is monitored at a latency of 1 ms until the first data transfer is started. Similarly, when accessing the target 3, the latency time of the target 3 is called by the latency timer time setting circuit 1 f and monitored at a latency of 1 μs.

For the master 2 and the target 3 for which the latency timer time is not set in the latency timer time setting circuit 1f, a predetermined latency time is accessed by a method using, for example, a default value or an average value. It can be input to the latency timer circuit 1b.

According to the present embodiment, since a function capable of varying the latency time depending on master or target-specific control and data transfer load is provided,
The bus cycle can be monitored with appropriate latency depending on the control and data transfer load specific to each master and target.

[Claim 2] FIG. 2 is a diagram showing a configuration of a plant control apparatus according to a second embodiment of the present invention.

In FIG. 2, an arbitration priority circuit 1g and a maximum data transmission amount setting circuit 1h are provided in an initiator 1 of a plant control device to which Compact PCI is applied. 14 differs from FIG. 14 in that an arbitration priority circuit 1g and a maximum data transmission amount setting circuit 1h are provided instead of the arbitration circulating circuit 1c, but the other block configurations are the same.

In the second embodiment shown in FIG.
If an arbitration priority circuit 1g and a maximum data transmission amount setting circuit 1h are provided in the initiator 1 of the plant control device to which the Compact PCI is applied instead of the arbitration circulating circuit 1c, and a plurality of masters 2 simultaneously cause arbitration, It has a function that can change the priority of arbitration based on the maximum data transmission amount unique to the master related to the PCI load.

The master 2 or the target 3 notifies the initiator 1 of its own maximum data transmission amount. The initiator 1 detects the maximum data transmission amounts from the master 2 and the target 3, respectively, sets the maximum data transmission amount in the maximum data transmission amount setting circuit 1h for each of the master 2 and the target 3, and inputs the same to the arbitration priority circuit 1g.

When an arbitration request is issued from a plurality of masters at the same time, the arbitration priority ordering circuit 1g determines the maximum data transmission amount unique to the master related to the load of the Compact PCI (the maximum data transmission amount of the master itself and the related data amount). Arbitration priority is determined by the maximum data transmission amount of the target).

For example, if the maximum data transmission amount of the master 2 is 10 kbytes and the load is heavy, and the maximum data transmission amount of the other masters is 1 kbyte and the load is light, and the arbitration of the master 2 is to be prioritized, the initiator 1 must be a master. 2 and another master simultaneously issue an arbitration request, the maximum data transmission amount is read by the maximum data transmission amount setting circuit 1h in which the maximum data transmission amount is set in advance, and the arbitration priority order circuit 1
The arbitration of the master 2 having a heavy load is prioritized by determining the loads of the master 2 and the other masters from the respective maximum data transmission amounts by g.

For the master 2 and the target 3 for which the maximum data transmission amount is not set in the maximum data transmission amount setting circuit 1h, for example, a default value or an average value is used as the maximum data transmission amount. , The maximum data transmission amount can be set. Also,
Instead of setting the maximum data transmission amount to the master 2 and the target 3, a specific priority may be assigned to the master 2 according to, for example, a mounting position (slot) on the bus.

According to this embodiment, each master 2 and target 3 set the maximum data transmission amount in the maximum data transmission amount setting circuit 1h provided in the initiator 1 of the plant control device to which Compact PCI is applied, The arbitration priority circuit 1g determines the arbitration priority according to the maximum data transmission amount. As described above, an appropriate arbitration priority can be determined based on the maximum data transmission amount specific to the master and the target related to the load of the Compact PCI.

[Claim 3] FIG. 3 is a diagram showing a configuration of a plant control apparatus according to a third embodiment of the present invention.

In FIG. 3, an arbitration priority circuit 1g and an arbitration number counter circuit 1i are provided in an initiator 1 of a plant control device to which Compact PCI is applied. 14 in that an arbitration priority circuit 1g and an arbitration number counter circuit 1i are provided instead of the arbitration circulating circuit 1c, but other block configurations are the same.

In the third embodiment shown in FIG.
An arbitration priority circuit 1g and an arbitration number setting counter circuit 1i are provided in the initiator 1 of the plant control device to which the Compact PCI is applied instead of the arbitration circulating circuit 1c.
t A function is provided in which the priority of arbitration can be varied according to the number of arbitrations of each master 2 related to the PCI load.

In the initiator 1, the number of arbitrations counted for each master is set in the arbitration number counter circuit 1i. That is, in the arbitration number counter circuit 1i, the number of times permitted as a bus master by arbitration is set, and this number is set to the arbitration priority circuit 1g.
Is input to

When a plurality of masters simultaneously issue an arbitration request, the arbitration priority circuit 1g determines the arbitration priority according to the number of arbitrations of the masters.

For example, it is assumed that the number of arbitrations is large because the load on the master 2 is heavy, and the number of arbitrations is small because the load on the other masters is light. In this case, when an arbitration request is simultaneously generated from the master 2 and another master, the initiator 1 sets the arbitration number counter circuit 1
The count value of the number of arbitrations occurring before that set in i is read. And
The arbitration priority circuit 1g discriminates the loads of the master 2 and other masters from the number of arbitrations, thereby giving priority to the arbitration of the master 2 having a heavy load.

If the count value set in the arbitration number counter circuit 1i is the same between the masters to be arbitrated, the priority cannot be determined only from the count value.
Such a state is the same in the initial state. In this case, for example, as in the related art (FIG. 14),
Arbitration priority is determined by the slot in which the master is mounted, or arbitration priority is determined by the maximum data transmission amount of the master as in the second embodiment of the present invention. Can be.

According to this embodiment, the arbitration number setting counter circuit 1i provided in the initiator 1 of the plant control apparatus to which Compact PCI is applied
The number of arbitrations of each master related to the load of actPCI is set, and the arbitration priority circuit 1g determines the arbitration priority based on the number of arbitrations for each master. Thus, Co
An appropriate arbitration priority can be determined based on the number of master arbitrations related to the mpact PCI load.

[Claim 4] FIG. 4 is a diagram showing a configuration of a plant control apparatus according to a fourth embodiment of the present invention.

In FIG. 4, a slot detection circuit 1j and a board type setting circuit 1k are provided in an initiator 1 of a plant control device to which Compact PCI is applied. The other block configuration is the same as that of the conventional FIG.

In the fourth embodiment shown in FIG.
The slot detection circuit 1j and the board type setting circuit 1k are provided in the initiator 1 of the plant control device to which the Compact PCI is applied, and when an interrupt is generated from a plurality of masters 2 and the targets 3 simultaneously, the type of the board related to the importance of the interrupt And a function that can change the priority of interrupts.

The initiator 1 detects each board type corresponding to the slot in which the master 2 and the target 3 are mounted, and sets the board type in the board type setting circuit 1k in advance so as to correspond to the slot. Note that the master can set the substrate type of each master or target in the substrate type setting circuit 1k of the initiator.

When an interrupt request is issued from a plurality of masters or targets at the same time, the slot that issued the request is detected by the slot detection circuit 1j. The interrupt router circuit 1d reads the board type set in the board type setting circuit 1k corresponding to the slot detected by the slot detection circuit 1j, and, based on these, loads a plurality of masters or targets that have requested an interrupt. The priority of the interrupt is determined by determining the weight of the interrupt.

For example, it is assumed that the master 2 is a network control board and the load is heavy, and the target 3 is an input / output board and the load is light. In this case, when the initiator 1 detects an interrupt request from the master 2 and the target 3 simultaneously, the slot detecting the interrupt request is determined by the slot detection circuit 1j, and the board type corresponding to this slot is determined by the board type setting circuit 1k. It is read into the interrupt router circuit 1d. In the interrupt router circuit 1d, the interrupt of the master 2 having a heavy load is prioritized by discriminating the load of the master 2 and the load of the target 3 according to each substrate type.

According to this embodiment, the slot detection circuit 1j and the board type setting circuit 1k are provided in the initiator of the plant control device to which the Compact PCI is applied, and an interrupt request is generated from a plurality of masters 2 and targets 3 simultaneously. In this case, the priority of the interrupt is determined based on the type of the board related to the importance of the interrupt, instead of performing the interrupt processing with the interrupt priority determined by the slot in which the master or the target is mounted. As a result, an appropriate interrupt priority can be determined according to the type of each master and target substrate related to the control load.

[Claim 5] FIG. 5 is a diagram showing a configuration of a plant control apparatus according to a fifth embodiment of the present invention.

In FIG. 5, a hot swap detection circuit 11 and an access lock setting circuit 1m are provided in an initiator 1 of a plant control device to which Compact PCI is applied. The other block configuration is the same as that of the conventional FIG.

In the fifth embodiment shown in FIG.
A hot swap detection circuit 11 and an access lock setting circuit 1 m are provided in the initiator 1 of the plant control device to which the Compact PCI is applied, and the initiator 1 is notified that the hot swap is being performed, and the self PCI lock function is used. It has a function to lock the access of the user.

When the master 2 or the target 3 performs a hot swap, the hot swap circuit 2d or 3d is set. Specifically, by providing a hot swap switch, turning on this switch in accordance with the hot swap, the control and input / output of the board are stopped, and an interrupt is generated in the initiator 1 so that access is not possible. Notify.

The initiator 1 detects that the master 2 or the target 3 is being hot swapped by the hot swap detection circuit 11 and inputs the hot lock to the access lock setting circuit 1 m so that all masters can access the master or target being hot swapped. To lock.

For example, when hot swapping the master 2 mounted in the slot S3 (not shown, the same applies hereinafter), the master 1 sets the hot swap circuit 2d, and the initiator 1 sends the hot swap detection circuit 11 to the hot swap detection circuit 11l. Then, it detects that the master 2 mounted in the slot S3 is hot swapping, and sets the slot S3 in the access lock setting circuit 2d so that the initiator 1 and other masters do not access the master 2.
As a result, the access to the master 2 is locked using the lock function of the Compact PCI.

According to this embodiment, the master or target slot information during hot swap is detected by the hot swap detection circuit 11 provided in the initiator 1 of the plant control apparatus to which the Compact PCI is applied, and the access lock setting circuit 1 m To enter. As a result, the hot swapping slot is detected and the Compact PC
With the lock function of I, access lock can be performed on the slot during hot swap.

[Claim 6] FIG. 6 is a diagram showing a configuration of a plant control apparatus according to a sixth embodiment of the present invention.

In FIG. 6, a hot swap detection circuit 11 is provided in an initiator 1 of a plant control apparatus to which Compact PCI is applied, and an access prohibition slot setting circuit 2j is provided in each master. The other block configuration is the same as that of the conventional FIG.

In the sixth embodiment shown in FIG.
A hot swap detection circuit 11 is provided in the initiator 1 of the plant control device to which the Compact PCI is applied, and an access prohibition slot setting circuit 2j is provided in all the masters 2 to notify the initiator 1 that hot swap is being performed. It has a function to notify the master 2 of the access prohibition slot.

When the master 2 or the target 3 performs the hot swap, the hot swap circuit 2d or 3d is set. Specifically, by providing a hot swap switch, turning on this switch in accordance with the hot swap, the control and input / output of the board are stopped, and an interrupt is generated in the initiator 1 so that access is not possible. Notify.

The initiator 1 detects that the master 2 or the target 3 is undergoing hot swap by the hot swap detection circuit 11 and inputs the access prohibition slot to the access prohibition slot setting circuit 2j of all masters, whereby the master 1 Locks access to the master or target during hot swap.

For example, when the target 3 mounted in the slot S3 is hot-swapped, the target 3 sets the hot-swap circuit 3d, and the initiator 1 uses the hot-swap detection circuit 11 to perform the slot S3.
It is detected that the target 3 mounted on 3 is performing hot swap. Then, in order to prevent the initiator and the master from accessing the target 3, the slot S3 in which the target 3 is mounted is inputted to the access prohibition slot setting circuit 2j of all masters, and the access to the target 3 is locked.

According to this embodiment, the master or target slot during hot swap is detected by the hot swap detection circuit provided in the initiator of the plant control device to which Compact PCI is applied, and the access prohibition provided in all masters is prohibited. Input to slot setting circuit.
Thus, by notifying all the masters of the slot being hot swapped, access to the slot can be prohibited.

[Claim 7] FIG. 7 is a diagram showing a configuration of a plant control apparatus according to a seventh embodiment of the present invention.

In FIG. 7, bus arbiter circuits 2k and 3h and access rejection setting circuits 21 and 3i are provided on required substrates in each master 2 and target 3 of a plant control apparatus to which Compact PCI is applied. The bus arbiter circuits 2k and 3h and the access denial setting circuits 21 and 3i are provided for any board required by the master and the target, for example, all boards or some boards.
Can be provided. The other block configuration is the same as that of the conventional FIG.

The bus arbiter circuits 2k and 3h are connected to the master 2 and the local bus masters 2e and 3e for controlling the local bus in the target, and the initiator 1 or another master only when permitted by the local bus masters 2e and 3e. Controls whether it can become the bus master of its local bus. The access rejection setting circuits 21 and 3i make settings for rejecting access from the initiator 1 and other masters.

In the seventh embodiment shown in FIG.
Master 2 of plant control equipment applying Compact PCI
In addition, a bus arbiter circuit 2k, 3h and an access denial setting circuit 21, 3i are provided in the target 3, and when the initiator 1 accesses via the Compact PCI, each master 2 and the target 3 have a function of denying access by control or transmission load. Have.

When the loads on the master 2 and the target 3 are heavy and the initiator 1 and other masters do not want to access, the access rejection setting circuits 21 and 3i are set. According to the setting of the access rejection setting circuits 21 and 3i, the access rejection is input to the bus arbiter circuits 2k and 3h.

For example, when the load of the master 2 mounted in the slot S3 is heavy and it is desired to reject access from the initiator 1 and other masters, the master 2 sets an access rejection setting circuit 21 therein. As a result, the bus arbiter circuit 2k arbitrates the local bus and rejects access from the initiator 1 and other masters. At the same time, the initiator 1 and the other masters read the setting of the access rejection setting circuit 21 to detect the access rejection and prohibit the access to the master 2 mounted in the slot S3.

According to this embodiment, the bus arbiter circuits 2k and 3h and the access denial setting circuits 21 and 3i are provided in the required master 2 and target 3 of the plant control device to which the Compact PCI is applied, and control and transmission load are provided. Accordingly, if it is not desired to accept access from the initiator 1 or another master, the access rejection setting circuit 21 can be set to reject the access.

[Claim 8] FIG. 8 is a diagram showing a configuration of a plant control apparatus according to an eighth embodiment of the present invention.

In FIG. 8, a PC is used as a common first bus.
A local backplane bus 6 is provided as a common second bus in a plant control apparatus to which the I bus 0 is applied, and required boards of the initiator 1, each master 2 and each target 3 are connected to this bus 6. . Each of the masters 2 and each of the targets 3 connected to the local backplane bus 6 have a bus use flag setting circuit 1o, 2o.
And bus busy detection circuits 1p and 2p. Which board is connected to the local backplane bus 6 can be arbitrarily determined as necessary. For example, all boards of the initiator 1, each master 2, and each target 3 can be connected. Then, some of the substrates can be connected. The other block configuration is the same as that of the conventional FIG.

In the eighth embodiment shown in FIG.
A local backplane bus 6 is provided as a common second bus of a plant control device to which Compact PCI0 is applied, and not only data transfer by the PCI bus 0 but also a local backplane bus when the PCI bus 0 is used. 6 can be used to transfer data.

The initiator 1 uses the local backplane bus 6 to operate the master 2 and the target 3.
When the master 2 accesses the target 3 and other masters in the same way, the initiator 1 or the master 2 attempting to access the
It is checked whether the bus busy flag is set in the bus busy detection circuits 1p and 2p.

If the bus busy flag is set in the bus busy detecting circuits 1p and 2p, the local backplane bus 6 is busy by another master or the like, and therefore the system waits until its use is completed. Will do.

If the bus busy flag is not set in the bus busy detecting circuits 1p and 2p, the own bus busy flag setting circuit 1o or 2o is set. As a result, the bus busy flag is input to the bus busy detecting circuits 1p and 2p of the initiator 1 and all the masters 2 connected to the local backplane bus 6. In this state, using the local backplane bus 6,
Data transmission is performed with a predetermined board.

When the necessary data transmission is completed, the setting of the bus busy flag setting circuits 1o and 2o is released, and the bus busy flags are returned to all the bus busy detecting circuits 1p and 2p. As a result, other masters can access the local backplane bus 6.

For example, when the initiator 1 is accessing another master or another target via the PCI bus 0 and the master 2 wants to access the target 3, it cannot be accessed using the PCI bus 0. Therefore, the master 2 confirms that the flag is not set in the bus use detection circuit 2p, that is, that the local backplane bus 6 is in a usable state, and then the bus use flag is set in the bus use flag setting circuit 2o. The target 3 is accessed by setting the medium flag. At this time,
Since the bus busy flag is set, the initiator 1 and other masters detect that the local backplane bus 6 is busy by the bus busy detecting circuit,
Access to the local backplane bus 6 is prohibited.

According to this embodiment, a local backplane bus 6 is provided as a common second bus in a plant control apparatus to which the PCI bus 0 is applied, and the initiator 1 and all masters connected to this bus 6 The busy flag of the local backplane bus 6 is input to a bus busy detecting circuit such as another master by setting the bus busy flag setting circuits 1o and 2o provided in the bus. As a result, even when the PCI bus 0 is used by the initiator 1 or another master, data can be transmitted using the local backplane bus 6.

[Claim 9] FIG. 9 is a diagram showing a configuration of a plant control apparatus according to a ninth embodiment of the present invention.

In FIG. 9, a second initiator 7 which can be a Compact PCI bus master or can be accessed from the bus master, that is, has a master and target function, is connected to a plant controller to which Compact PCI is applied. It is provided together with one initiator 1. In the second initiator 7 having both functions, a control operation unit 7a, an access latency timer circuit 7b, an arbitration circulating circuit 7c, an interrupt router circuit 7d, and a Compact PCI interface circuit 7e similar to those of the first initiator 1 are provided. Is provided with a duplication data storage circuit 7f. The other block configuration is the same as that of the conventional FIG.

In the ninth embodiment shown in FIG. 9,
Master to the plant control equipment to which Compact PCI is applied,
A second initiator 7 having both functions of the target is provided, and a redundant data storage circuit 7f is provided in the initiator 7 having both functions to provide a function of making the initiator redundant.

The first initiator 1 outputs, as the duplication data, the input / output data of the master 2 and the target 3 and the control status of the duplication data of the second initiator 7 having both functions for each control cycle. Input to the storage circuit 7f. For example, when the first initiator 1 inputs data from the master 2 in one control cycle, the first initiator 1 sends the data to the duplex data storage circuit 7f of the second initiator 7 having both functions in the control cycle. Enter that data. The second initiator 7 uses the data input to the duplexing data storage circuit 7f to perform the same control calculation as the control calculation performed by the initiator 1 so that the control states are matched.

When the first initiator 1 cannot continue the control calculation due to a failure or the like, the control is taken over by the second initiator 7 having the same control state immediately before that, and the plant continues to operate. Activate the control unit.

Note that the first initiator 1 that has caused a failure or the like is replaced with a normal board, and the initiator has a redundant configuration again.

According to this embodiment, the first initiator is provided in the dual data storage circuit 7f of the second initiator 7 having both master and target functions provided in the plant control apparatus to which Compact PCI is applied. 1 inputs control data that is input / output for each control cycle, and performs redundancy of the initiator. As a result, even when the first initiator 1 cannot continue the control operation due to a failure or the like, the second initiator 7 having both the master and target functions takes over the control and continues the operation of the plant control device.

[Claim 10] FIG. 10 shows a tenth embodiment of the present invention.
It is a figure showing composition of a plant control device concerning an embodiment.

In FIG. 10, a second initiator 7 that can be a Compact PCI bus master or that can be accessed from the bus master, that is, has a master and target function, is connected to a plant controller to which Compact PCI is applied. It is provided together with one initiator 1.
In the second initiator 7 having both functions, a control operation unit 7a, an access latency timer circuit 7b, an arbitration circulating circuit 7c, an interrupt router circuit 7d, and a CompactPCI interface circuit 7e similar to those of the first initiator 1 are provided. , A control cycle timer circuit 7h and an arbitration control circuit 7g. The first initiator 1 is provided with an arbitration circulating circuit 1g instead of the arbitration circulating circuit 1c. The other block configuration is the same as that of the conventional FIG.

In the tenth embodiment shown in FIG. 10, a second initiator 7 having both master and target functions is added to a plant control device to which Compact PCI is applied.
Are provided, a control cycle timer circuit 7h and an arbitration control circuit 7g are provided in the second initiator 7 having both functions, and an arbitration priority circuit 1g is provided in the first initiator 1. The second initiator 7 having both functions is input to the arbitration control circuit by the control cycle timer circuit 7h every alternate control cycle to request arbitration from the first initiator 1, and the first initiator 1 performs the arbitration priority circuit. At 1 g, the second initiator 7 arbitrates to become the bus master. As a result,
The second initiators 1 and 7 become alternate bus masters, and constitute a redundant initiator.

Now, the second initiator 7 having both functions activates the arbitration control circuit 7g in a control cycle (for example, once every two control cycles) preset in the control cycle timer circuit 7h, and starts the arbitration control circuit 7g. An arbitration request is input to the arbitration priority circuit 1g. In the arbitration priority circuit 1g, the arbitration control circuit 7
The priority of arbitration from g is set to the highest priority.

Then, the first initiator 1 reads the arbitration priority set in the arbitration priority circuit 1g, and sends the arbitration priority to the second initiator 7 having both functions according to the preset highest priority.
Allow use of Compact PCI.

As a result, the first initiator 1 and the second initiator 7 having both functions alternately become Compact PCI bus masters in each control cycle, and perform the same control operation to match the control states. Let it.
If one of the boards of the first and second initiators 1 and 7 fails, the normal board alone continues the control.

According to this embodiment, the arbitration control is performed every alternate control cycle by the control cycle timer circuit 7h of the second initiator 7 having both master and target functions provided in the plant control apparatus to which Compact PCI is applied. The circuit 7g is activated, and the arbitration priority circuit 1g provided in the first initiator 1 is activated.
To enter. As a result, the second initiator having both the master and target functions can take over the control every alternate control cycle, and the initiator can be made redundant.

[Claim 11] FIG. 11 shows an eleventh embodiment of the present invention.
It is a figure showing composition of a plant control device concerning an embodiment.

In FIG. 11, a network control board 8 is provided in a plant control device to which Compact PCI is applied.
A network control circuit 8j and a network state change detection circuit 8k are provided in the network control board 8. An access prohibition slot setting circuit 2j is provided in all masters 2. Since this network control board 8 functions as a master, an access prohibition slot setting circuit is provided like the other masters (not shown). In FIG. 11, the network control board 8
Is a master that can be a bus master, but the present invention is not limited to this, and a control board can be used as a target, and a plurality of masters and targets can be used as a control board. Other block configurations are the same as those of the conventional FIG.
Is the same as

In the eleventh embodiment shown in FIG. 11, a network control board 8 is provided in a plant control apparatus to which Compact PCI is applied.
A network link state change detection circuit 8k is provided therein;
Also, an access prohibition slot setting circuit 2j is provided for all masters 2.
And a function of detecting a change in the state of the network link and notifying the initiator 1 and all masters 2 of the impossibility of access when the network link is disabled.

When the network control board 8 detects a network status change, for example, a disconnection of a connection cable or a relay station failure, by the network status change detection circuit 8j, the initiator 1 uses the interrupt function of the Compact PCI. To notify the network status change. Thereafter, the initiator uses the lock function of the Compact PCI to input the slot in which the network control board 8 is mounted to the access prohibition slot setting circuit 2j of all masters 2. For example, when the network cable of the network control board 8 mounted in the slot S3 is disconnected, the network control board 8 detects the network disconnection by the network state change detection circuit 8j and sends the slot S3 to the access prohibition slot setting circuit 2j of the master 2. Is set to notify the initiator 1 and the master 2 that access to the slot S3 (network control board 8) is prohibited.

When the connection state of the network control board 8 returns to the normal state, the initiator is again generated by the network state change detection circuit 8j and is set in the access prohibition slot setting circuit 2j of the master 2. , The access prohibition to the slot S3 is released, and the control is resumed.

According to this embodiment, the network link status change detection circuit 8k in the network control board 8 provided in the plant control device to which the Compact PCI is applied detects the network link status change in all the masters 2 and prohibits access. Input to the slot setting circuit 2j. As a result, if the network link becomes abnormal,
By prohibiting the initiator 1 and all masters 2 from accessing the network control board 8, it is possible to prevent the occurrence of an abnormality due to the access to the network control board 8 in a poor connection state.

[Other 1] FIG. 12 is a diagram showing a configuration of a plant control apparatus according to a twelfth embodiment of the present invention.

In FIG. 12, a local memory bus 4 and a memory board 5 are provided in a plant control apparatus to which Compact PCI is applied, and control circuits 1n, 2n, and 3 for the memory bus are provided in the initiator 1, the master 2, and the target 3, respectively.
j. Other block configurations are the same as those of the conventional FIG.
Same as 4.

In the twelfth embodiment shown in FIG. 12, a local memory bus 4 is provided as a second backplane bus to a plant control apparatus to which Compact PCI is applied.
A memory board 5 is provided in a memory-dedicated slot, and the available memory is expanded in common without increasing the memory in the initiator 1, the master 2, and the target 3 themselves.

Now, a local memory bus 4 and a memory-dedicated slot are provided in a plant control device to which Compact PCI is applied. On the other hand, the initiator 1, master 2, and target 3 have memory bus control circuits 1n, 2n, 3n respectively.
j is provided. When the memory capacity of the initiator 1 or the master 2 or the target 3 becomes insufficient, the memory board 5 is mounted on the memory dedicated slot of the local memory bus 4. For example, if the memory capacity of the initiator 1 is insufficient, the memory board 5 is mounted and the control circuit 1 for the memory bus is mounted.
The memory 5a is accessed by n.

According to this embodiment, the initiator 1, the master 2, and the target 3 are connected to the local memory board 5 provided in the dedicated memory slot by the local memory bus 4 of the plant control device to which the Compact PCI is applied. . As a result, the capacity of the local memory can be increased without increasing the substrate mounting area of the initiator 1, the master 2, and the target 3 and without imposing a load on Compact PCI.

[Other 2] FIG. 13 is a diagram showing a configuration of a plant control apparatus according to the thirteenth embodiment of the present invention.

In FIG. 13, a network control board 8 is provided in a plant control device to which Compact PCI is applied, and ROMs 2q and 3k that can be electrically written in a master 2 and a target 3 and a buffer memory 2r for an OS (Operating System), 3l are provided. The other block configuration is the same as that of the conventional FIG.

In the thirteenth embodiment shown in FIG. 13, a network control board 8 is provided in a plant control device to which Compact PCI is applied, and an electrically writable ROM and OS for each master 2 and target 3 are provided in each master 2 and target 3. A buffer memory and a write control circuit for electrically writable ROM are provided. Then, each master 2 and target 3 are transmitted from the network control board 8 using the control network 9.
OS can be changed.

When receiving the OS data from the network 9, the network control board 8 stores the OS data in the OS buffer memories 2r and 31 of the master 2 and the target 3.
Write S data. In the master 2 and the target 3, a ROM 2q capable of electrically writing the OS data is provided.
And 3k. For example, when the network control board 8 receives the OS data of the master 2 from the network 9 in order to change the OS of the master 2, the network control board 8 transmits the OS buffer memory 2r of the master 2.
The received OS data is written in. The master 2 changes the OS of the master 2 by writing the OS data to the electrically writable ROM 2q.

According to this embodiment, when OS data is transmitted to the network control board 8 provided in the plant control device to which the Compact PCI is applied, the OS buffer memory provided in each master 2 and the target 3 2r,
Input OS data to 3l. As a result, the master 2 and the target 3 write the OS data into the ROMs 2q and 3k capable of electrically writing the OS data,
change.

[0137]

According to the first aspect of the present invention, since the access latency of the Compact PCI can be determined for each master and target by the access latency timer circuit provided in the initiator, when the master and the target having different loads coexist, the load is light. CompactP with low latency for access to master and target
CI can be monitored, and the operation rate as a plant control device improves.

According to the second aspect of the present invention, the maximum data transmission amount unique to the master can be set by the maximum data transmission amount setting circuit provided in the initiator. The priority order is determined not by the slot in which the master is installed, but by the size of the maximum data transmission amount related to the access time that occupies the Compact PCI. Is improved.

According to the third aspect of the present invention, the arbitration number counter circuit provided in the initiator can count the number of arbitrations of each master unique to the plant control device. Is determined not by the slot in which the master is mounted, but by the size of the arbitration occupying the Compact PCI, so that the operation rate as a plant control device is improved.

According to the fourth aspect of the present invention, the substrate type can be set for each of the master and the target by the substrate type setting circuit provided in the initiator. Is determined not by the slot in which the master and the target are mounted but by the type of the master and target substrates related to the load of the plant control device, so that the operation rate of the plant control device is improved.

According to a fifth aspect of the present invention, when a master and a target are hot swapped, a hot swap detection circuit provided in the initiator detects that the hot swap is being performed, and an access lock setting circuit provided in the initiator sets another master. , The access to the master and the target during the hot swap can be prohibited, so that the operation rate as the plant control device is improved.

According to a sixth aspect of the present invention, when a master and a target are hot swapped, a hot swap detection circuit provided in the initiator detects that hot swap is being performed, and the initiator sets an access prohibition slot setting circuit provided in all masters. By setting a hot-swapping slot to the master, it is possible to prohibit the master from accessing the master and target during the hot-swapping, thereby improving the operation rate of the plant control device.

According to a seventh aspect of the present invention, when the load of control and transmission of the master and the target is high and the priority is higher than the data transmission with the initiator, the bus arbiter circuit and the access denial setting circuit provided in the master and the target are used. Since the access from the initiator can be denied, the operation rate as the plant control device is improved.

According to the present invention, when the load of the Compact PCI related to the load of the plant control device is high, the local backplane bus provided in the plant control device and the bus use flag setting circuit provided in the initiator and master 2 are provided. When the initiator is accessing the master and target, and when the master is accessing other masters and targets, the other masters can use the Compact PCI
Data can be transmitted without imposing a load on the power plant, thereby improving the operation rate of the plant control device.

According to a ninth aspect of the present invention, in one control cycle, the initiator writes control data into a dual data storage circuit provided in an initiator having both master and target functions provided in a plant control device. Since the control is the same, the initiator can be duplicated. Even if the initiator fails, the plant control device does not stop, so that the operation rate of the plant control device is improved.

According to a tenth aspect of the present invention, there is provided an initiator having both master and target functions provided in a plant control apparatus, a control cycle timer circuit and an arbitration control circuit provided in the initiator, and an arbitration priority circuit provided in the initiator. Since the control is taken over for each control cycle, the initiator can be duplicated, and even if the initiator fails, the plant control device is not stopped, so that the operation rate of the plant control device is improved.

The invention according to claim 11 is a network control board provided in a plant control apparatus and a network provided in the network board when a network link abnormality is detected due to disconnection of a network cable, failure of a relay station such as a hub, or the like. Since the state change detection circuit and the access prohibition slot setting circuit provided in the master can prohibit access to the network control board that has detected the link abnormality, the operation rate of the plant control device is improved.

[Brief description of the drawings]

FIG. 1 shows a compact according to an embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 2 shows a compact according to a second embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 3 shows a compact according to a third embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 4 shows a compact according to an embodiment 4 of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 5 shows a compact according to a fifth embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 6 shows a compact according to a sixth embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 7 shows a compact according to an embodiment 7 of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 8 shows a compact according to an embodiment 8 of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 9 shows a compact according to an embodiment 9 of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 10 is a diagram showing a computer system according to a tenth embodiment of the present invention.
It is a block diagram of a plant control device to which act PCI is applied.

FIG. 11 is a view showing a computer system according to an embodiment 11 of the present invention;
It is a block diagram of a plant control device to which act PCI is applied.

FIG. 12 shows a compact according to a twelfth embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 13 shows Compact according to a thirteenth embodiment of the present invention.
It is a block diagram of a plant control device to which PCI is applied.

FIG. 14 is a block diagram of a conventional plant control device to which Compact PCI is applied.

[Explanation of symbols]

0 PCI bus 1 Initiator 2 Master 3 Target 4 Local memory bus 5 Memory board 6 Local backplane bus 7 Initiator having both master and target functions 8 Network control board 9 Network 1a, 7a Control operation unit 1b, 7b Access latency Timer circuit 1c, 7c Arbitration circulating circuit 1d, 7d Interrupt router circuit 1e, 2i, 3g, 7e, 8i Compact PCI interface circuit 1f Latency timer time setting circuit 1g Arbitration priority circuit 1h Maximum data transmission amount setting circuit 1i Arbitration number counter circuit 1j slot detection circuit 1k board type setting circuit 11l hot swap detection circuit 1m access lock setting circuit 1n, 2n, 3j memory bus control circuit Road 1o, 2o Bus busy flag setting circuit 1p, 2p Bus busy detection circuit 2a, 3a, 8a Local bus master 2b, 3b, 8b Memory 2c, 3c, 8c ROM 2d, 3d, 8d Hot swap circuit 2e, 3e 8e Local bus control circuit 2f, 8f Arbitration request circuit 2g, 8g Target access control circuit 2h, 3f, 8h Interrupt request circuit 2j Access prohibition slot setting circuit 2k, 3h Bus arbiter circuit 21, 3i Access rejection setting circuit 2q, 3k Electrical Writable ROM 2r, 3l Buffer memory for OS 7f Data storage circuit for duplication 7g Arbitration control circuit 7h Control cycle timer circuit 8j Network control circuit 8k Network state change detection circuit

Claims (11)

[Claims] An arbitration unit connected to a common bus and arbitrating the bus, an initiator board serving as a bus master for controlling data transmission on the common bus, and a bus master controlling the bus by the arbitration unit A plant control apparatus for controlling a plant, comprising one or more master boards that can be a master board and one or more target boards that can be accessed from a bus master, wherein a bus cycle is started in the initiator board. Time measurement means for measuring the time from the start of transfer of the first data to the first data, setting means for setting a reference value of the time for each of the master substrate or the target substrate, and the time measured by the time measurement means Means for detecting that the value has been exceeded, and Plant control system, characterized in that the stop. 2. An initiator board which is connected to a common bus and arbitrates the bus, includes an initiator board serving as a bus master for data transmission on the common bus, and a bus master controlling the bus by the arbitration means. In a plant control apparatus configured to include one or more master boards that can be a master board and one or two or more target boards that can be accessed from a bus master and control a plant, the arbitration means may be provided in the initiator board. A plant control apparatus comprising: means for setting a maximum data transmission amount for each master board; and priority order determination means for determining a priority order of bus use permission based on the maximum data transmission amount. 3. An initiator board which is connected to a common bus and arbitrates the bus, and serves as a bus master for controlling data transmission on the common bus, and a bus master which controls the bus by the arbitration means. In a plant control apparatus configured to include one or more master boards that can be a master board and one or two or more target boards that can be accessed from a bus master and control a plant, the arbitration means may be provided in the initiator board. A plant control device comprising: an arbitration number counting unit that counts the number of times the bus master has been granted by the arbitration; and a priority order determination unit that determines a priority order of the bus use permission based on the number. 4. An initiator board which is connected to a common bus and arbitrates the bus, and which serves as a bus master for controlling data transmission on the common bus, and a bus master which controls the bus by the arbitration means. In a plant control device configured to include one or more master substrates that can be a master substrate and one or two or more target substrates that can be accessed from a bus master and control a plant, the master substrate and the initiator substrate An interrupt arbitration unit for arbitrating an interrupt from the target substrate to the initiator substrate, a unit for detecting a mounting position of the substrate that generated the interrupt request, and a unit for setting a type of the substrate, wherein the interrupt arbitration unit includes: Determine the priority of interrupts according to the type of board or the mounting position of the board Plant control system, characterized in that. 5. An initiator board which is connected to a common bus and arbitrates the bus, and serves as a bus master for controlling data transmission on the common bus, and a bus master which controls the bus by the arbitration means. In a plant control apparatus configured to include one or more master substrates that can be a master substrate and one or two or more target substrates that can be accessed from a bus master and control a plant, the master substrate or A hot-plug insertion / removal detection unit that detects that the target substrate is being inserted / removed in a power-supply hot-plug state, and an access prohibition setting unit that sets prohibition of access to any substrate connected to the bus with respect to the master substrate. The access method is performed when the stopcock insertion / removal detection unit detects that the stopcock is being inserted / removed. Plant control system and sets the access prohibition to the substrate of the stopcock in insertion to all of the master substrate leading to the bus by the stop setting means. 6. An initiator board which is connected to a common bus and arbitrates the bus, and serves as a bus master for controlling data transmission on the common bus, and a bus master which controls the bus by the arbitration means. In a plant control apparatus configured to include one or more master boards that can be a master board and one or two or more target boards that can be accessed from a bus master and control a plant, the master board is included in the initiator board. Alternatively, a stopcock insertion / removal detecting means for detecting that the target substrate is being inserted / removed in a power plug state, and the stopcock for all the master substrates connected to the bus when detecting that the target board is being inserted / removed by this means. Mounting position notifying means for notifying the mounting position information of the middle board; and Plant control apparatus characterized by comprising: a means for inhibiting access to the substrate in the mounting position, the by mounting location. 7. An initiator board which is connected to a common bus and arbitrates the bus, and serves as a bus master for controlling data transmission on the common bus, and a bus master which controls the bus by the arbitration means. In a plant control apparatus configured to include one or more master substrates that can be used as a target and one or two or more target substrates that can be accessed from a bus master and control a plant, a required number of the master substrate and the target substrate A plant control apparatus comprising: an access rejection setting unit for rejecting access from the initiator substrate on a substrate. 8. An initiator board which is connected to a common first bus and arbitrates the first bus, and serves as a bus master for controlling data transmission on the common first bus; A plant for controlling the plant, comprising one or more master substrates that can be a bus master that controls the common first bus by means and one or more target substrates that can be accessed from the bus master In the control device, a common second bus is provided, and at least one of the initiator board, the master board, and the target board is connected to the second bus, and a required board of the initiator board and the master board is provided. Means for setting a bus-in-use flag when the second bus is used, and another master board. Plant control system being characterized in that a detecting means bath used for detecting that sets the use flag. 9. A first initiator board which is connected to a common bus and arbitrates the bus, includes a first initiator board serving as a bus master for data transmission on the bus, and the first arbitration means. In a plant control device configured to include one or more master boards that can be a bus master that controls the bus and one or more target boards that can be accessed from the bus master and control a plant, Second arbitration means for arbitrating the bus and multiplexing data storage means for storing multiplexing control data for redundantly configuring the initiator; and
A second initiator board which can be the bus master by the first arbitration means of the first initiator board, or which can be accessed from the bus master; wherein the first initiator board is the second initiator board; Wherein the multiplexing control data is periodically written to the multiplexing data storage means. 10. A first initiator board which is connected to a common bus and includes first arbitration means for arbitrating the bus, and serving as a bus master for controlling data transmission on the bus;
A plant that includes one or more master boards that can be a bus master that controls the bus by the first arbitration means, and one or more target boards that can be accessed from the bus master, and controls the plant The control device, further comprising: second arbitration means connected to the bus for arbitrating the bus; and control cycle time management means for periodically outputting an arbitration request to the first initiator board;
A second initiator board which can become the bus master by the first arbitration means of the initiator board. 11. An initiator board which is connected to a common bus and arbitrates the bus, includes an initiator board serving as a bus master for controlling data transmission on the common bus, and a bus master which controls the bus by the arbitration means. A plant control device configured to include one or more master substrates that can be used as a master substrate and one or more target substrates that can be accessed from a bus master and control a plant, wherein at least one of the master substrate or the target substrate One is a communication board that performs communication for connecting between plant control devices.This communication board monitors a communication link state, and when a change in the link state is detected, all communication boards except for this communication board are monitored. Link monitoring means for notifying the link state to the master board, all master boards, An access prohibition setting unit for prohibiting access to a board mounted in a fixed position, wherein when the communication board cannot communicate with another plant control device, the communication board is provided to the access prohibition setting unit of another control board. A plant control device which sets access prohibition to the device and releases the access prohibition of the access prohibition setting means when communication is possible.