JP5762871B2 - Digital control device and digital control system provided with the digital control device - Google Patents

Description

  The present invention relates to a digital control device that does not affect the output terminal of an updated control device even if a simulation signal is input to the control device to be updated during a field test, and a digital control system including the digital control device.

  In a digital controller used in a power plant or the like and a digital controller system configured by connecting the digital controller to a network, input / output for transmission signals between a plurality of digital controllers connected to the network A test (data transmission test) is being conducted. When performing a data transmission test, a dedicated tool is directly connected to the digital control device that is the signal source, and a simulated value is input to the signal value.

  On the other hand, in the digital control device that is the signal receiving destination, a dedicated tool is directly connected to monitor the received signal in the same manner as the digital control device that is the transmission source. At this time, it is determined whether or not the data transmission test is normally performed by confirming whether the simulated value transmitted from the transmission source is correctly received at the reception destination.

  In such a digital control device and a digital control device system configured by connecting the digital control device to a network, the calculation result in the control device based on the operation command signal from the operation monitoring operation panel is a signal with which the signal is in control. On the other hand, it becomes a driving instruction signal, which is directly calculated as an input signal in the controller and directly affects the output signal.

  Therefore, for example, as described in Japanese Patent Application Laid-Open No. 2010-178106 (Patent Document 1), even when a simulated signal (simulated value) is input in a transmission test performed in a state where a dedicated tool is directly connected, There has been proposed a digital control device in which an output signal calculated using this simulated value does not affect other network connection devices.

JP 2010-178106 A

  When updating from an analog control device to a digital control device or from a digital control device to a new digital control device, check that the updated digital control device and the entire digital control system are operating properly Field tests are conducted. The field test includes an interlock test in addition to the data transmission test. In the interlock test, an operation command signal is transmitted from the operation monitoring operation panel to a control device on the network, and an arithmetic process is executed in the control device by the transmitted operation command signal. It is confirmed whether or not.

  When updating from an analog control device to a digital control device, or from a digital control device to a new digital control device, the system should be prioritized and updated to avoid prolonged plant shutdowns. Is going. That is, the digital control device that is not subject to update and the digital control device are in operation.

  Therefore, not only in the data transmission test but also in the interlock test, the calculation result in the control device based on the operation command signal from the operation monitoring operation panel becomes the operation instruction signal for the control device with which there is a signal exchange and is input in the controller Since it is calculated as a signal as it is, the output terminal (auxiliary machine) of an updated control apparatus that is already in operation may be operated.

  However, in the conventional digital control device including the digital control device described in Patent Document 1 as described above, the operation of the output end (auxiliary device) of the updated control device is performed during the interlock test without using a dedicated tool. Considering the influence, there is a problem that hard control is performed by a jumper or a lift on the updated control device side.

  The present invention has been made in order to solve the above-described problems. Even when a simulation signal is input to the control device to be updated at the time of the on-site test including the interlock test, the updated control device simulates it. It is an object of the present invention to provide a digital control device that is not calculated by a signal and does not affect the output end, and a digital control system including the digital control device.

  In order to solve the above-described problems, a digital control device according to an embodiment of the present invention includes a transmission function unit that transmits and receives data, an input address memory unit that stores a signal received by the transmission function unit, and the input address memory. A control arithmetic unit that performs a control operation based on a signal stored in the unit, an output address memory unit that stores a result calculated by the control arithmetic unit, and a signal stored in the output address memory unit as the output address A previous value memory unit for storing separately from the memory unit, an output buffer unit connected to the output terminal, receiving and storing one of the signals stored in the output address memory unit and the previous value memory unit, and the selected mode Whether to allow the signal stored in the output address memory unit to be stored in the previous value memory unit, and the output It is determined which one of the first signal path connecting the buffer unit and the output address memory unit and the second signal path connecting the output buffer unit and the previous value memory unit is selected, and the determination result Accordingly, permission is given to the previous value memory unit and the signal stored in the output address memory unit is stored in the previous value memory unit, while selecting between the first signal path and the second signal path And a switching permission unit that gives the switch permission to switch the signal path to the switched signal path and switches the switch.

In order to solve the above-described problem, a digital control device according to an embodiment of the present invention includes a transmission function unit that transmits and receives data, an input address memory unit that stores a signal received by the transmission function unit, and the input One of the previous value memory unit for storing the signal stored in the address memory unit separately from the input address memory unit, the signal stored in the input address memory unit, and the signal stored in the previous value memory unit A control calculation unit that performs control calculation based on the output address memory unit that stores a result calculated by the control calculation unit, and a signal stored in the input address memory unit based on the selected mode. Whether to permit storage in the value memory unit, the first signal path connecting the input address memory unit and the control calculation unit, and the previous time It is determined which of the second signal paths that connect the memory unit and the control arithmetic unit is selected, and the previous value memory unit is granted according to the determination result and stored in the input address memory unit. A switching permission unit for switching the switch by allowing the switch to switch the signal path to the selected signal path among the first signal path and the second signal path. The switching permission unit includes a first mode for selecting the first signal path and a signal stored in the input address memory unit by giving permission to the previous value memory unit. It is stored in the previous value memory unit and has a second mode for selecting the second signal path, and is connected to another digital control device for exchanging signals, In carrying out the test, whether the information digital controller is updated, already depending on whether the updated, that one of said first mode or said second mode is selectably configured Features.

In order to solve the above-described problem, a digital control system according to an embodiment of the present invention is configured by connecting at least two of the digital control devices so that data transmission is possible over a network.

  According to the present invention, even when a simulation signal is input to the control device to be updated at the time of the field test, the updated control device does not affect the output end without being calculated by the simulation signal. Even when the interlock test is performed, hard isolation by an updated jumper or lift on the control device side can be eliminated.

1 is a schematic diagram showing a digital control system according to a first embodiment of the present invention. Schematic which shows the digital control system which concerns on the 2nd Embodiment of this invention. Schematic which shows the digital control system which concerns on the 3rd Embodiment of this invention. Schematic which shows the digital control system which concerns on the 4th Embodiment of this invention. Schematic which shows the digital control system which concerns on the 5th Embodiment of this invention.

  Hereinafter, a digital control device and a digital control system according to embodiments of the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 includes a first control device 20a and a second control device 20b, which are examples of a digital control device according to the first embodiment of the present invention, and these digital control devices 20a and 20b. It is the schematic which shows the structure of 10 A of 1st digital control systems.

  The first digital control system 10A monitors and controls the operation status of a plurality of digital control devices 20 (20a, 20b), for example, and the digital control devices 20 (20a, 20b) via the network 11. The operation monitoring operation unit 40 is connected to be able to transmit data. Here, the first control device 20a is an already updated digital control device, and the second control device 20b is a digital control device (update target) updated by the current update.

  The first control device 20a and the second control device 20b are substantially the same except that they are updated digital control devices or update target digital control devices. In the description, the contents that do not need to be specifically distinguished between the first control device 20a and the second control device 20b will be collectively described as the digital control device 20 (a and b are not added to the reference numerals). . In addition, regarding the components of the digital control devices 20a and 20b such as the transmission function unit 21 (21a and 21b), the contents that do not need to be distinguished from each other are grouped without adding a and b to the reference numerals. I will explain.

  The digital control device 20 includes a transmission function unit 21 for enabling transmission with the network 11 and a controller 22 for processing a transmission signal received by the transmission function unit 21. An auxiliary machine 23 to be controlled is connected.

  The controller 22 inputs the output address (previous value) stored in the input address memory unit 25, the switching permission unit 27, the switch 28, the control calculation unit 29, the output address memory unit 30, and the output address memory unit 30. A previous value memory unit 26 for storing data and an output buffer unit 31 are provided.

  The input address memory unit 25 has a storage area for storing data, and stores the transmission signal received from the transmission function unit 21 in this storage area. The previous value memory unit 26 has a storage area for storing data, and stores the previous value (transmission signal immediately before receiving the current transmission signal) stored in the output address memory unit 30 in this storage area.

  The switching permission unit 27 has a mode switching element that accepts a mode switching request for switching between a mode (test mode) at the time of a field test and a normal mode (normal mode), and which mode is selected by the mode switching element. Depending on whether the switch 28 is switched, the switch 28 is controlled. Further, when the test mode is selected, the switching permission unit 27 includes a copy permission signal S1 for storing the output address (previous value) stored in the output address memory unit 30 in the previous value memory unit 26, and a subsequent stage. A switching permission signal S2 for switching a storage source of data to be supplied to the output buffer unit 31 is generated.

  Based on the switching permission signal S2 sent from the switching permission unit 27, the switch 28 switches whether the storage source of data to be given to the output buffer unit 31 in the subsequent stage is the output address memory unit 30 or the previous value memory unit 26. . That is, by switching the switch 28, one of the output address stored in the output address memory unit 30 and the output address (previous value) stored in the previous value memory unit 26 is given to the output buffer unit 31 in the subsequent stage.

  When the test mode is selected, the switch 28 uses the previous value memory unit 26 as the data storage source to be supplied to the output buffer unit 31 at the subsequent stage. When the normal mode is selected, the switch 28 supplies the data to the output buffer unit 31 at the subsequent stage. The data storage source is switched to the output address memory unit 30.

  The control calculation unit 29 receives a signal from the input address memory unit 25 and performs a control calculation based on the received signal. Then, the control calculation unit 29 gives the calculation result of the control calculation to the output address memory unit 30.

  The output address memory unit 30 has a storage area for storing data, and stores the calculation result received from the control calculation unit 29 in this storage area. The output buffer unit 31 has a storage area for storing data, stores a signal sent from the output address memory unit 30 or the previous value memory unit 26, and outputs the signal to the auxiliary machine 23.

  Then, the case where the interlock test from the driving | operation monitoring operation part 40 to the 2nd control apparatus (update object) 20b is performed is demonstrated.

  When performing an interlock test from the operation monitoring operation unit 40 to the second control device 20b, first, the updated first control device 20a that is in signal communication with the second control device 20b is not affected. In order to do so, the switching permission unit 27a of the already updated first control device 20a is set to the test mode, and the switching permission unit 27b of the second control device 20b to be updated is set to the normal mode to start the test.

  That is, in the second control device 20b to be updated, the signal path connecting the output address memory unit 30b and the output buffer unit 31b is connected by the switch 28b to connect the previous value memory unit 26b and the output buffer unit 31b. While the signal path to be connected is disconnected, in the already updated first control device 20a, the signal path for connecting the previous value memory section 26a and the output buffer section 31a is connected by the switch 28a to connect the output address memory section. The signal path connecting 30a and the output buffer unit 31a is separated.

  When the interlock test start request is given from the operation monitoring operation unit 40 to the second control device 20b, the operation command signal transmitted from the operation monitoring operation unit 40 is transmitted to the transmission function unit 21b of the second control device 20b. And stored in the input address memory unit 25b.

  In the second control device 20b, the control calculation unit 29b performs calculation processing based on the signal received from the input address memory unit 25b, and the calculation result is given to and stored in the output address memory unit 30b. The calculation result stored in the output address memory unit 30b is given from the output address memory unit 30b to the output buffer unit 31b connected by the switch 28b.

  The output buffer unit 31b stores the calculation result given from the output address memory unit 30b and operates the auxiliary machine 23b according to the stored signal. By confirming the operation of the auxiliary machine 23b, the quality of the interlock test in the second control device (update target) 20b is determined.

  On the other hand, in the updated first control device 20a that is in signal communication with the second control device 20b, the switching permission unit 27a is set to the test mode before the interlock test is started. The current value data of the output address memory unit 30a is stored in the previous value memory unit 26a by the copy permission signal S1, and the switch 28a is moved to the previous value memory unit 26a side by the switching permission signal S2 from the switching permission unit 27a. It has been switched.

  In the updated first control device 20a, the calculation result in the second control device 20b to be updated becomes an operation instruction signal for the first control device 20a and is input as an input signal into the controller 22a. However, since the signal path connecting the output address memory unit 30a and the output buffer unit 31a is disconnected by the switch 28a, the calculation result in the second control device 20b is transferred to the first control device 20a. On the other hand, even if it becomes a driving instruction signal, the driving instruction signal is not given to the output buffer unit 31a.

  On the other hand, the output buffer unit 31a receives and stores the signal received from the previous value memory unit 26a, that is, the previous value of the output address stored in the output address memory unit 30a. As a result, in the first control device 20a, the calculation result in the second control device 20b is not given as an operation instruction signal to the auxiliary machine 23a, but the signal stored in the output buffer unit 31a (the previous value of the output address). ) Is given to the auxiliary machine 23a.

  According to the first digital control system 10A configured by connecting the digital control device 20 configured in this way and a plurality of digital control devices 20a, 20b such as two, for example, the second target to be updated Even if the operation command signal is input to the control device 20b, the updated first control device 20a connects the signal path connecting the previous value memory unit 26a and the output buffer unit 31a by setting the test mode. On the other hand, since the signal path that connects the output address memory unit 30a and the output buffer unit 31a is disconnected, the first control device 20a that has been updated operates with the simulation signal (the calculation result of the second control device 20b). The auxiliary machine 23a that is the output end is not affected.

That is, even if an operation command signal is input to the second control device 20b to be updated, the updated first control device 20a is a simulation in which the output buffer unit 31a that supplies a signal to the auxiliary machine 23a is input. Since the calculation result based on the signal is not received, the auxiliary machine 23a as the output terminal is not affected. Therefore, the work of hard isolation using a jumper or lift by a human system, which has been performed before the conventional interlock test, is not required, and the test time can be shortened.

  In the first digital control system 10A shown as an example in FIG. 1, the updated first control device 20a and the second control device 20b to be updated are digital control devices having the same configuration. It is not always necessary that both control devices 20a and 20b are digital control devices having the same configuration. For example, when the first control device 20a has been updated, any of the second control devices 20b1 and 20b2 described in other embodiments (described later) may be used instead of the second control device 20b to be updated. good. Conversely, when the second control device 20b is an update target, any of the second control devices 20a1 and 20a2 described in the other embodiments may be used instead of the updated first control device 20a.

[Second Embodiment]
FIG. 2 is a schematic diagram showing a configuration of a second digital control system 10B including digital control devices 20a1 and 20b1 which are examples of the digital control device according to the second embodiment of the present invention.

  The second digital control system 10B is different from the first digital control system in that it includes digital control devices 20a1 and 20b1 instead of the digital control devices 20a and 20b. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  The second digital control system 10B monitors and controls the operation status of a plurality of digital control devices 20 (20a1, 20b1) such as two units and the digital control device 20 (20a1, 20b1) via the network 11, for example. The operation monitoring operation unit 40 is connected to be able to transmit data. Here, the first control device 20a1 is an already updated digital control device, and the second control device 20b1 is a digital control device (update target) updated by the current update.

  The digital control devices 20a1 and 20b1 are different from the digital control devices 20a and 20b in that the controllers 22a1 and 22b1 are provided instead of the controllers 22a and 22b. In the following description, the contents that do not need to be described separately for the controllers 22a1 and 22b1 will be described only for one controller 22a1, and description for the other controller 22b1 will be omitted. The handling of the symbols a and b is the same as in the case of the digital control devices 20a and 20b.

  The controller 22a1 sets the output address (previous value) stored in the input address memory unit 25, the switching permission unit 27, the switch 28, the control calculation unit 29, the output address memory unit 30, and the output address memory unit 30. A previous value memory unit 26 for storing data and an output buffer unit 31 are provided. The output address memory unit 30 has a connection terminal, receives a calculation result of the control calculation unit 29, is a simulation signal related to the operation of the auxiliary machine 23, and is a simulation signal (to be transmitted to the second control device 20b1). A simulator 32 for generating a repetitive simulation signal) is configured to be connectable.

  Then, the case where the interlock test from the driving | operation monitoring operation part 40 to the 2nd control apparatus (update object) 20b1 is performed is demonstrated.

  When the interlock test from the operation monitoring operation unit 40 to the second control device 20b1 is performed, first, the updated first control device 20a1 that is in signal communication with the second control device 20b1 is not affected. In order to do so, the switching permission unit 27a of the already updated first control device 20a1 is set to the test mode, and the switching permission unit 27b of the second control device 20b1 to be updated is set to the normal mode to start the test.

  That is, in the second control device 20b1 to be updated, the signal path connecting the output address memory unit 30b and the output buffer unit 31b is connected by the switch 28b to connect the previous value memory unit 26b and the output buffer unit 31b. While the signal path to be connected is disconnected, in the already updated first control device 20a1, the signal path for connecting the previous value memory unit 26a and the output buffer unit 31a is connected by the switch 28a to connect the output address memory unit. The signal path connecting 30a and the output buffer unit 31a is separated.

  When the interlock test start request is given from the operation monitoring operation unit 40 to the second control device 20b1, the operation command signal transmitted from the operation monitoring operation unit 40 is transmitted to the transmission function unit 21b of the second control device 20b1. And stored in the input address memory unit 25b.

  In the second control device 20b1, the control calculation unit 29b performs calculation processing based on the signal received from the input address memory unit 25b, and the calculation result is given to and stored in the output address memory unit 30b. The calculation result stored in the output address memory unit 30b is given from the output address memory unit 30b to the output buffer unit 31b connected by the switch 28b.

  The output buffer unit 31b stores the calculation result given from the output address memory unit 30b and operates the auxiliary machine 23b according to the stored signal. By confirming the operation of the auxiliary machine 23b, the quality of the interlock test in the second control device (update target) 20b is determined.

  On the other hand, in the updated first control device 20a1, which is in signal communication with the second control device 20b1, the switching permission unit 27a is set to the test mode before the interlock test is started. The current value data of the output address memory unit 30a is stored in the previous value memory unit 26a by the copy permission signal S1, and the switch 28a is moved to the previous value memory unit 26a side by the switching permission signal S2 from the switching permission unit 27a. It has been switched.

  In the updated first control device 20a1, the calculation result in the second control device 20b1 to be updated becomes an operation instruction signal for the first control device 20a1, and is input as an input signal into the controller 22a1. However, since the signal path connecting the output address memory unit 30a and the output buffer unit 31a is disconnected by the switch 28a, the calculation result in the second control device 20b1 is transferred to the first control device 20a1. On the other hand, even if it becomes a driving instruction signal, the driving instruction signal is not given to the output buffer unit 31a.

  On the other hand, the output buffer unit 31a receives and stores the signal received from the previous value memory unit 26a, that is, the previous value of the output address stored in the output address memory unit 30a. As a result, in the first control device 20a1, the calculation result in the second control device 20b1 is not given as an operation instruction signal to the auxiliary machine 23a, but the signal stored in the output buffer unit 31a (the previous value of the output address) ) Is given to the auxiliary machine 23a.

  In addition, the simulator 32 connected to the output address memory unit 30a generates a simulation signal related to the operation of the auxiliary machine 23a that has received the calculation result of the control calculation unit 29a of the updated first control device 20a1. To the control device 20b side.

  According to the second digital control system 10B configured by connecting the digital control devices 20a1 and 20b1 configured in this manner and a plurality of digital control devices 20a1 and 20b1 such as two, for example, the second control system 10B is an update target. Even if an operation command signal is input to the second control device 20b1, the updated first control device 20a1 sets the signal path for connecting the previous value memory unit 26a and the output buffer unit 31a by setting the test mode. On the other hand, since the signal path connecting the output address memory unit 30a and the output buffer unit 31a is disconnected, the simulated signal (calculation result in the second control device 20b1) is updated in the updated first control device 20a1. Is not calculated and does not affect the auxiliary machine 23a which is the output end.

  That is, even if an operation command signal is input to the second control device 20b1 to be updated, in the updated first control device 20a1, an output buffer unit 31b that provides a signal to the auxiliary machine 23a is input. Since the calculation result based on the signal is not received, the auxiliary machine 23a as the output terminal is not affected. Therefore, the work of hard isolation using a jumper or lift by a human system, which has been performed before the conventional interlock test, is not required, and the test time can be shortened.

  In addition, a simulator 32 that generates a simulation signal for returning to the second control device 20b1 related to the operation of the auxiliary machine 23a that has received the calculation result of the control calculation unit 29a of the updated first control device 20a1 can be connected. Thus, if the simulator 32 is connected, a simulation signal related to the operation of the auxiliary machine 23a that has received the calculation result of the control calculation unit 29a of the first control device 20a1 that has been updated by the simulator 32 is given to the transmission function unit 21a. Since the transmission function unit 21a transmits to the second control device 20b1 via the network 11, an interlock test in a state closer to actual plant operation can be performed.

  In the second digital control system 10B shown as an example in FIG. 2, the updated first control device 20a1 and the second control device 20b1 to be updated are digital control devices having the same configuration. The two control devices 20a1 and 20b1 do not necessarily have to be digital control devices having the same configuration. For example, in the case of the updated first control device 20a1, any of the second control devices 20b and 20b2 described in other embodiments may be used instead of the second control device 20b1 to be updated. Conversely, when the second control device 20b1 is an update target, any of the second control devices 20a and 20a2 described in other embodiments may be used instead of the updated first control device 20a1.

[Third Embodiment]
FIG. 3 is a schematic diagram showing a configuration of a third digital control system 10C including digital control devices 20a2 and 20b2 which are examples of the digital control device according to the third embodiment of the present invention.

  The third digital control system 10C is different from the first digital control system 10A in that it includes digital control devices 20a2 and 20b2 instead of the digital control devices 20a and 20b. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  The third digital control system 10C monitors and controls the operation status of a plurality of digital control devices 20 (20a2, 20b2), for example, and the digital control devices 20 (20a2, 20b2) via the network 11. The operation monitoring operation unit 40 is connected to be able to transmit data. Here, the first control device 20a2 is an already updated digital control device, and the second control device 20b2 is a digital control device (update target) updated by the current update.

  The digital control devices 20a2 and 20b2 are different from the digital control devices 20a and 20b in that the controllers 22a2 and 22b2 are provided instead of the controllers 22a and 22b. In the following description, the contents that do not need to be described separately for the controllers 22a2 and 22b2 will be described only for one controller 22a2, and the description for the other controller 22b2 will be omitted. The handling of the symbols a and b is the same as in the case of the digital control devices 20a and 20b.

  The controller 22a2 includes an input address memory unit 25, a previous value memory unit 26 that stores an input address (previous value) stored in the input address memory unit 25, a switching permission unit 27, a switch 28, and a control calculation unit 29. And an output address memory unit 30.

  The previous value memory unit 26 in the controller 22a2 stores the previous value (the transmission signal immediately before receiving the current transmission signal) stored in the input address memory unit 25 in its own storage area. Further, when the test mode is selected, the switching permission unit 27 includes a copy permission signal S1 for storing the input address (previous value) stored in the input address memory unit 25 in the previous value memory unit 26, and a subsequent stage. A switching permission signal S2 for switching a storage source of data to be supplied to the control arithmetic unit 29 is generated.

  Based on the switching permission signal S2 sent from the switching permission section 27, the switch 28 in the controller 22a2 uses the input address memory section 25 or the previous value memory section 26 as the data storage source to be supplied to the control arithmetic section 29 at the subsequent stage. Switch between. In other words, when the test mode is selected, the storage source of the data to be supplied to the control arithmetic unit 29 at the subsequent stage is the previous value memory unit 26, whereas when the normal mode is selected, the data to be supplied to the control arithmetic unit 29 at the subsequent stage is selected. The storage source is switched to the input address memory unit 25.

  The control calculation unit 29 in the controller 22a2 receives a signal from the input address memory unit 25 or the previous value memory unit 26, and performs control calculation based on the received signal. Then, the control calculation unit 29 gives the calculation result of the control calculation to the output address memory unit 30.

  Then, the case where the interlock test from the driving | operation monitoring operation part 40 to the 2nd control apparatus (update object) 20b2 is performed is demonstrated.

  When performing an interlock test from the operation monitoring operation unit 40 to the second control device 20b, first, the updated first control device 20a that is in signal communication with the second control device 20b is not affected. In order to do so, the switching permission unit 27a of the already updated first control device 20a is set to the test mode, and the switching permission unit 27b of the second control device 20b to be updated is set to the normal mode to start the test.

  That is, in the second control device 20b2 to be updated, a signal path connecting the input address memory unit 25b and the control calculation unit 29b is connected by the switch 28b to connect the previous value memory unit 26b and the control calculation unit 29b. While the signal path to be connected is disconnected, in the already updated first control device 20a, the signal path for connecting the previous value memory section 26a and the control calculation section 29a is connected by the switch 28a to connect the input address memory section. The signal path connecting 25a and the control calculation unit 29a is cut off.

  When the interlock test start request is given from the operation monitoring operation unit 40 to the second control device 20b2, the operation command signal transmitted from the operation monitoring operation unit 40 is transmitted to the transmission function unit 21b of the second control device 20b2. And stored in the input address memory unit 25b.

  In the second control device 20b2, a signal path that connects the input address memory unit 25b and the control calculation unit 29b is connected by the switch 28b, while a signal path that connects the previous value memory unit 26b and the control calculation unit 29b. Are separated, the signal stored in the input address memory unit 25b is given to the control arithmetic unit 29b.

  The control calculation unit 29b performs calculation processing based on the signal received from the input address memory unit 25b, and sends the calculation result to the output address memory unit 30b. The output address memory unit 30b stores the calculation result calculated by the control calculation unit 29b and operates the auxiliary machine 23b according to the stored signal. By confirming the operation of the auxiliary machine 23b, the quality of the interlock test in the second control device (update target) 20b2 is determined.

  On the other hand, in the updated first control device 20a2 that is in signal communication with the second control device 20b2, since the switching permission unit 27a is set to the test mode before the interlock test starts, the switching permission unit 27a The current value data of the input address memory unit 25a is stored in the previous value memory unit 26a by the copy permission signal S1, and the switch 28a is moved to the previous value memory unit 26a side by the switching permission signal S2 from the switching permission unit 27a. It has been switched.

  In the updated first control device 20a2, the calculation result in the second control device 20b2 to be updated becomes an operation instruction signal for the first control device 20a2, and is input as an input signal into the controller 22a. However, since the signal path connecting the input address memory unit 25a and the control operation unit 29a is disconnected by the switch 28a, the operation result in the second control device 20b2 is transferred to the first control device 20a2. On the other hand, even if it becomes a driving | operation instruction signal, the said driving | operation instruction signal is not given to the control calculating part 29a.

  On the other hand, the control calculation unit 29a performs control calculation based on the signal received from the previous value memory unit 26a, that is, the previous value of the input address stored in the input address memory unit 25a, and the calculation result is output to the output address memory. To the part 30a. The output address memory unit 30a stores the calculation result given from the control calculation unit 29a.

  According to the third digital control system 10C configured by connecting the digital control devices 20a2 and 20b2 configured in this way and a plurality of digital control devices 20a2 and 20b2 such as two, for example, the update target Even if the operation command signal is input to the second control device 20b2, the updated first control device 20a2 sets the signal path for connecting the input address memory unit 25a and the control calculation unit 29a by setting the test mode. On the other hand, in order to connect the signal path that connects the previous value memory unit 26a and the control calculation unit 29a, the first control device 20a2 that has been updated has its simulated signal (the calculation result in the second control device 20b2). Is not calculated and does not affect the auxiliary machine 23a which is the output end.

  That is, even if an operation command signal is input to the second control device 20b2 to be updated, in the first control device 20a2 that has been updated, the control calculation unit 29a calculates based on the input simulation signal. Since the calculation is based on the input address (previous value) stored in the previous value memory unit 26a, the auxiliary machine 23a that is the output end is not affected. Therefore, the work of hard isolation using a jumper or lift by a human system, which has been performed before the conventional interlock test, is not required, and the test time can be shortened.

  In the third digital control system 10C shown as an example in FIG. 3, the updated first control device 20a2 and the second control device 20b2 to be updated are digital control devices having the same configuration. It is not always necessary that both control devices 20a2 and 20b2 are digital control devices having the same configuration. For example, in the case of the updated first control device 20a2, any of the second control devices 20b and 20b1 described in other embodiments may be used instead of the second control device 20b2 to be updated. Conversely, when the second control device 20b2 is an update target, any of the second control devices 20a and 20a1 described in the other embodiments may be used instead of the updated first control device 20a2.

[Fourth Embodiment]
FIG. 4 is a schematic diagram showing a configuration of a fourth digital control system 10D which is an example of a digital control system according to the fourth embodiment of the present invention.

  The fourth digital control system 10D is configured such that the test devices 35a and 35b used for performing the data transmission test can be connected to the digital control devices 20a and 20b with respect to the first digital control system 10A. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted. In FIG. 4, the operation monitoring operation unit 40 that is not involved in the data transmission test is omitted. The handling of the symbols a and b is the same as in the above embodiment.

  The fourth digital control system 10D is connected to a plurality of digital control devices 20 (20a, 20b), for example, via the network 11. Here, the first control device 20a is an already updated digital control device, and the second control device 20b is a digital control device (update target) updated by the current update. Further, in the fourth digital control system 10D, a test device 35a used for performing a data transmission test is connected to the first control device 20a, and a test device 35b is connected to the second control device 20b.

  The test device 35a connected to the first control device 20a has a function of displaying the result of the data transmission test. The test apparatus 35a is connected to the input address memory unit 25a and displays a signal (input address value) stored in the input address memory unit 25a. The test device 35b connected to the second control device 20b has a function of giving a simulated value and a function of displaying the result of the data transmission test. The test apparatus 35b is connected to the output address memory unit 30b, gives a simulated value to the output address memory unit 30b, and displays a signal (output address value) stored in the output address memory unit 30b.

  Next, the case where the fourth digital control system 10D performs a data transmission test from the second control device 20b to be updated to the updated first control device 20a will be described.

  First, in performing the data transmission test, the first control device that has already been updated in order not to affect the updated first control device 20a that is in signal communication with the second control device 20b. The switching permission unit 27a of 20a is set to the test mode, and the switching permission unit 27b of the second control device 20b to be updated is set to the normal mode.

  That is, in the second control device 20b to be updated, the signal path connecting the output address memory unit 30b and the output buffer unit 31b is connected by the switch 28b to connect the previous value memory unit 26b and the output buffer unit 31b. While the signal path to be connected is disconnected, in the already updated first control device 20a, the signal path for connecting the previous value memory section 26a and the output buffer section 31a is connected by the switch 28a to connect the output address memory section. The signal path connecting 30a and the output buffer unit 31a is separated. In this state, the data transmission test is started.

  In the second control device 20b to be updated, a simulated value for a data transmission test is given from the test device 35b to the output address memory unit 30b connected to the test device 35b. The simulated value given to the output address memory unit 30b is transmitted to the network 11 via the transmission function unit 21b. On the other hand, in the first control device 20a, the data is stored in the input address memory unit 25a in the controller 22a from the network 11 via the transmission function unit 21a.

  In the already updated first control device 20a, the test device 35a is used to check the address state of the input address memory unit 25a, which matches the simulated value of the output address memory unit 30a of the second control device 20b. The quality of the data transmission test is determined by checking whether or not

  According to the fourth digital control system 10D configured as described above, even if a simulated signal is input to the second control device 20b to be updated in the data transmission test, the updated first control device 20a Since it is not calculated by the simulation signal and does not affect the auxiliary machine 23 at the output end, the work of hard isolation using a jumper or a lift is unnecessary by a human system, and the test time can be shortened. Become.

  That is, the first controller 20a that has already been updated includes the previous value memory unit 26a, and connects the signal path that connects the previous value memory unit 26a and the control calculation unit 29a, while the input address memory unit 25a controls Interlock at the time of updating from the conventional control device (analog control device or digital control device) to the digital control device 20 (20b, 20b1, 20b2) because the signal path connecting the arithmetic unit 29a can be disconnected. The same effect as the test can be obtained in the data transmission test.

In addition, the digital control apparatus 20 which comprises the 4th digital control system 10D necessarily connects the digital control apparatuses 20a and 20b like the 4th digital control system 10D shown by FIG. It is not limited to. That is, the digital control devices 20a1, 20b1, 20a2, and 20b2 may be used instead of the digital control devices 20a and 20b. Further, when the digital control device 20 is configured, the test device 35 may be incorporated.
[Fifth Embodiment]

  FIG. 5 is a schematic diagram showing a configuration of a fifth digital control system 10E which is an example of a digital control system according to the fifth embodiment of the present invention.

  The fifth digital control system 10E is configured by connecting test devices 36a and 36b to the fourth digital control system 10D in place of the test devices 35a and 35b used for performing the function test. Is different. Therefore, in the description of the present embodiment, the difference will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted. In FIG. 4, the operation monitoring operation unit 40 that is not involved in the function test is omitted. The handling of the symbols a and b is the same as in the above embodiment.

  The fifth digital control system 10E is connected to a plurality of digital control devices 20 (20a, 20b), for example, via the network 11. Here, the first control device 20a is an already updated digital control device, and the second control device 20b is a digital control device (update target) updated by the current update. Further, in the fifth digital control system 10E, a test device 36a used for performing a data transmission test is connected to the first control device 20a, and a test device 36b is connected to the second control device 20b.

  The test device 36a is connected to the input address memory unit 25a and the switching permission unit 27a, displays the input address value stored in the input address memory unit 25a, and gives a mode switching command to the switching permission unit 27a. The test device 36b is connected to the output address memory unit 30b and the switching permission unit 27a, gives a simulated value to the output address memory unit 30b, and displays the output address value stored in the output address memory unit 30b. A mode switching command is given to the switching permission unit 27b.

  The test device 36 stores a data, a transmission test unit 37 responsible for executing a data transmission test, a monitor 38 that visually presents (displays) information such as input / output address simulation, control status, and test results to the user. And a data storage unit 39.

  The transmission test unit 37 holds a program created in advance for executing the data transmission test, and is responsible for executing the data transmission test by executing the program. The transmission test unit 37a displays the input address value stored in the input address memory unit 25a on the monitor 38 and gives a mode switching command to the switching permission unit 27a. Further, the transmission test unit 37b gives a simulated value to the output address memory unit 30b, displays the output address value stored in the output address memory unit 30b on the monitor 38b, and gives a mode switching command to the switching permission unit 27b.

  The monitor 38 has an information presentation function for visually presenting information to the user. For example, the simulated value given to the output address memory 30b, the input address value stored in the input address memory unit 25a, the data control device 20a, Information such as the control state 20b and the data transmission test result is displayed to the user. The data storage unit 39 has a storage area, and can store test results such as a data transmission test in the storage area.

  Next, a case where the fifth digital control system 10E performs a data transmission test from the second control device 20b to be updated to the updated first control device 20a will be described.

  First, in starting the data transmission test, when the user (tester) inputs to the test apparatus 36b that the data transmission test is started, the test apparatus 36b and the test apparatus 36a execute the test program. When the test program is executed, first, the transmission test unit 37b sets the address of the output address memory unit 30 of the second control device 20b (data transmission source) to be updated, and the transmission test unit 37a has already been updated. The address of the input address memory unit 25 of one control device 20a (data receiving destination) is set.

  The setting of the addresses of the output address memory unit 30 of the second control device 20b (data transmission source) and the input address memory unit 25 of the first control device 20a (data reception destination) specifies, for example, a test range address. Alternatively, it can be performed by using a database in which test range addresses are set.

  Further, the transmission test units 37a and 37b do not affect the updated first control device 20a that is in signal communication with the second control device 20b, so that the first control that has already been updated is performed. The switching permission unit 27a of the device 20a is set to the test mode, and the switching permission unit 27b of the second control device 20b to be updated is set to the normal mode.

  When the transmission test unit 37 switches the mode of the switching permission unit 27, the second control device 20b connects the signal path connecting the output address memory unit 30b and the output buffer unit 31b by the switch 28b, and the previous value. While the signal path connecting the memory unit 26b and the output buffer unit 31b is separated, the previous value memory unit 26a and the output buffer unit 31a are connected by the switch 28a in the already updated first control device 20a. The signal path is connected to disconnect the signal path connecting the output address memory unit 30a and the output buffer unit 31a.

  Subsequently, the transmission test unit 37b of the test device 36b inputs a simulated value for the test range address of the output address memory unit 30b of the second control device 20b to be updated. On the other hand, the transmission test unit 37a of the test device 36a receives the signal state (input address value) of the test range address of the input address memory unit 25a, and sends the received input address value to the test device 36b (transmission test unit 37b).

  In the transmission test unit 37b, the signal state (input address value) of the test range address of the input address memory unit 25a in the first control device 20a matches the simulated state of the test range address set in the transmission test unit 37b. The data transmission test is judged as good or bad, and the quality judgment result is displayed on the monitor 38b. The transmission test unit 37b can display not only the pass / fail judgment result but also information specified by the user or the test program such as the simulated state of the set test range address on the monitor 38b.

  Moreover, the test apparatus 36b records the test data of the data transmission test including the pass / fail judgment result in the data storage unit 39b. As a result, the data storage unit 39 stores the signal state (input address value) of the test range address of the input address memory unit 25a, the simulated state of the test range address set in the transmission test unit 37b, and the input address memory unit 25a. Test data such as a match or mismatch between the input address value and the simulated value set in the transmission test unit 37b is stored.

  According to the fifth digital control system 10E configured as described above, in addition to the same effects as those of the fourth digital control system 10D, the test apparatus determines the output of the simulated value and the quality determination of the data transmission test result. 36 can be performed automatically. In addition, since the test device 36 includes the data storage unit 39, test data for the data transmission test can be stored in the data storage unit 39, and a form print of the stored data can be performed. Therefore, the test time of the data transmission test can be shortened, and editing work such as creation of a data transmission test report can be facilitated.

  Note that the digital control device 20 constituting the fifth digital control system 10E is not necessarily a system configured by connecting the digital control devices 20a and 20b as in the fifth digital control system 10E shown in FIG. It is not limited to. That is, the digital control devices 20a1, 20b1, 20a2, and 20b2 may be used instead of the digital control devices 20a and 20b.

  When the test device 36 does not need to have a function of storing test data of the data transmission test, the test device 36 that does not include the data storage unit 39 may be configured. Furthermore, when configuring the digital control device 20, the test device 36 may be incorporated. Furthermore, the monitor 38 is an example of information presenting means for presenting information to the user, and may be information presenting means that employs a method other than display.

  As described above, according to the digital control systems 10A to 10E configured by connecting the digital control device 20 and the plurality of digital control devices 20, the first control devices 20a, 20a1, and 20a2 that have been updated have their simulated signals. It is not calculated by (calculation results in the second control devices 20b, 20b1, and 20b2 to be updated), and the auxiliary machine 23a that is the output end of the updated first control devices 20a, 20a1, and 20a2. Therefore, the work of hard isolation using a jumper or lift by a human system, which has been performed before the conventional interlock test, is unnecessary, and the test time can be shortened.

  In addition, according to the second digital control system 10B, the interlock test in a state close to actual plant operation is performed by connecting the simulator 32 to the updated first control device 20a1 and performing the interlock test. It can be performed.

  Further, according to the fourth digital control system 10D, the auxiliary device 23a which is the output end of the first control devices 20a, 20a1 and 20a2 that has been updated is affected not only during the interlock test but also during the transmission test. Can be provided.

  Furthermore, according to the fifth digital control system 10E, the test device 36 can automatically perform signal simulation to the transmission source address and pass / fail judgment of the data transmission test result, thereby reducing the data transmission test time. Can be planned. In addition, since the test device 36 can store the test data result of the data transmission test, the data storage and form printing can be performed, the editing work can be facilitated, and the data transmission test. Time can be shortened.

  It should be noted that the present invention is not limited to the above-described embodiment as it is, and can be implemented in various forms other than the above-described examples in the implementation stage, and various modifications can be made without departing from the spirit of the invention. Can be omitted, replaced, or changed. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10A to 10E Digital control system 11 Network 20a, 20a1, 20a2 First control device (updated control device)
20b, 20b1, 20b2 Second control device (update target control device)
21 (21a, 21b) Transmission function part 22 (22a, 22b; 22a1, 22b1; 22a2, 22b2) Controller 23 (23a, 23b) Auxiliary machine 25 (25a, 25b) Input address memory part 26 (26a, 26b) Previous value Memory unit 27 (27a, 27b) Switching permission unit 28 (28a, 28b) Switch 29 (29a, 29b) Control operation unit 30 (30a, 30b) Output address memory unit 31 (31a, 31b) Output buffer unit 32 Simulator 35 ( 35a, 35b) Test device 36 (36a, 36b) Test device 37 (37a, 37b) Transmission test unit 38 (38a, 38b) Monitor 39 (39a, 39b) Data storage unit 40 Operation monitoring operation unit S1 Copy permission signal S2 switching Permission signal

Claims (10)

A transmission function unit for transmitting and receiving data;
An input address memory unit for storing a signal received by the transmission function unit;
A control calculation unit for performing a control calculation based on a signal stored in the input address memory unit;
An output address memory unit for storing results calculated by the control calculation unit;
A previous value memory unit for storing a signal stored in the output address memory unit separately from the output address memory unit;
An output buffer unit connected to an output terminal for receiving and storing one of the signals stored in the output address memory unit and the previous value memory unit;
Based on the selected mode, whether to permit the signal stored in the output address memory unit to be stored in the previous value memory unit, and to connect the output buffer unit and the output address memory unit It is determined which of the first signal path and the second signal path that connects the output buffer unit and the previous value memory unit is selected, and permission is given to the previous value memory unit according to the determination result. The switch stores the signal stored in the output address memory unit in the previous value memory unit, while permitting the switch to switch the signal path to the selected signal path of the first signal path and the second signal path. A digital control device comprising: a switching permission unit that gives and switches the switch. The switching permission unit includes a first mode for selecting the first signal path;
A second mode for giving permission to the previous value memory unit and storing the signal stored in the output address memory unit in the previous value memory unit and selecting the second signal path. The digital control device according to claim 1, wherein: A transmission function unit for transmitting and receiving data;
An input address memory unit for storing a signal received by the transmission function unit;
A previous value memory unit for storing a signal stored in the input address memory unit separately from the input address memory unit;
A control calculation unit that performs a control calculation based on one of a signal stored in the input address memory unit and a signal stored in the previous value memory unit;
An output address memory unit for storing results calculated by the control calculation unit;
Based on the selected mode, whether to permit the signal stored in the input address memory unit to be stored in the previous value memory unit, and to connect the input address memory unit and the control arithmetic unit It is determined which of the first signal path and the second signal path that connects the previous value memory unit and the control operation unit is selected, and permission is given to the previous value memory unit according to the determination result. The switch stores the signal stored in the input address memory unit in the previous value memory unit, and permits the switch to switch the signal path to the selected signal path out of the first signal path and the second signal path. A switching permission unit that gives and switches the switch ,
The switching permission unit includes a first mode for selecting the first signal path;
A second mode for giving permission to the previous value memory unit and storing the signal stored in the input address memory unit in the previous value memory unit and selecting the second signal path; And
The first mode is connected to another digital control device for signal exchange, and when the interlock test is performed, the first mode depends on whether the own digital control device is to be updated or has already been updated. Alternatively , a digital control device configured to be able to select one of the second modes . The switching permission unit, when performing a field test including the data transmission test in addition to the interlock test, depending on whether the own digital control device is to be updated or has already been updated. 4. The digital control device according to claim 3, wherein one of the first mode and the second mode is selectable . Whether it is connected to other digital control devices that communicate with each other, and whether the digital control device is to be updated or has already been updated when conducting on-site testing including interlock testing and data transmission testing 3. The digital control device according to claim 2 , wherein one of the first mode and the second mode can be selected accordingly. 6. A simulator capable of receiving a calculation result of the control calculation unit and generating a simulation signal related to an operation of an auxiliary machine connectable to the output terminal is connectable. The digital control device according to item. A test apparatus having a function of giving a simulated value to the output address memory unit, a function of reading a signal stored in the output address memory unit, and a function of reading a signal stored in the input address memory unit can be connected. The digital control device according to claim 1, wherein the digital control device is configured as follows. A result of reading a signal stored in an input address memory unit of the other digital control device by a test device connected to the other digital control device that is connected so as to be able to transmit signals to each other and communicates with the own digital control device , A function of presenting a result received from a test apparatus connected to the other digital control apparatus to the user, and a simulated value to the output address memory unit included in the digital control apparatus and the output 8. The digital control device according to claim 1, wherein a test device having a function of reading a signal stored in the address memory unit is connectable. 9. The digital control apparatus according to claim 7 , wherein the test apparatus further includes a data storage unit having an area for storing data. 10. A digital control system comprising at least two of the digital control devices according to claim 1 connected so as to be able to transmit data via a network .

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