JP2000299895A - Driver interface system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a driver interface system that quickly updates operating state information of a driver and realizes cost reduction of the system. SOLUTION: In this interface system, a plurality of drivers 4 are connected to a local station 6 and data sent/received between a main station 1 and the local station 6 by using an optical transmission line 9. The local station 6 transmits control information sent from the main station 1 to all the drivers 4 connected to itself. Furthermore, the local station 6 individually stores operating state information of the drivers 4 connected to itself and transfers the operating state information obtained from all the drivers 4 to the main station 1 at once.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interface between a plant controller and a drive device in a steel plant.

[0002]

2. Description of the Related Art FIG. 8 is a block diagram of a system used for conventional drive control. In FIG. 1, reference numeral 1 denotes a main station, which includes a drive control unit 2 for controlling a drive device and a drive monitoring unit 3 for monitoring an operation state of the drive device. Reference numeral 4 denotes a drive device for controlling the motors 5, the number of which is equal to the number of motors. Reference numeral 6 denotes a local station which is connected to each drive device by an electric signal path 7 and exchanges data with the main station 1. Then, the set of the local station 6 and the drive device and the motor connected to it are divided into predetermined units (blocks), for example, eight sets, and each block has a block number, and each set within each block has a station number. You have set. Data transmission is performed using an optical transmission line 9 via a repeater 8.

[0003] A drive device interface system in such a conventional system configuration will be described. First, transmission of drive control information from the main station 1 to the drive device 4 is performed in block units.
That is, the main station 1 transmits the drive control information by designating the destination block number, thereby
With each transmission, the drive control information is transmitted to a plurality of local stations existing in the block.
The local station 6 reads out the data when the block number in the transmitted data matches its own block number. Conversely, when the local station 6 transmits the operating state information of the drive device 4 connected to the local station 6 to the main station 1, the local station 6 must add the block number and the station number set for itself to the transmission information. Is recognized by the main station 1.

[0004]

In the conventional drive device interface system as described above, control information can be transmitted from the main station to a plurality of drive devices at once, but the control information is received. When the operation status information and history information of the drive device are transmitted to the main station, the information is transmitted for each local station connected to each drive device, so that only one drive device information can be transmitted in one transmission. However, it has been difficult to shorten the update cycle of the operation state information of all the drive devices. Further, since one local station is connected to one drive device (motor), a large number of local stations and optical cables for connecting the local stations are required, resulting in a problem that the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a first object of the present invention is to provide an interface system capable of shortening the update cycle of operating state information of a drive device. A second object is to obtain an interface system that can reduce the cost of the transmission system.

[0006]

In the interface system of a drive device according to the present invention, a plurality of drive devices are divided into predetermined units (blocks), and the drive devices in the block are connected for each block. Done 1
And a local station for exchanging data between the local station and the main station in each block.

Further, the main station transmits the drive control information by designating the destination local station, and the designated local station transmits the received drive control information to all of the drive units connected thereto. To communicate.

Further, the local station stores the individual operating state information of the drive unit connected thereto, and stores the stored operating state information in the main station in accordance with the drive unit control information from the main station. Send at once.

The main station transmits history information command information (collection start / collection stop / transfer) by designating the local station to which a drive device from which history information is to be collected and the drive device to which the drive device is to be connected. The local station collects (starts, stops, and transfers) the history information of the drive device in accordance with the received history information command information (starts, stops, and transfers).

When transmitting history information command information (collection start / collection stop / transfer) from the main station, a requested history information item is designated, and the local station collects only the designated history information item. (Collection start / collection stop / transfer).

The local station holds configuration information such as the number and position of the drive devices connected to the local station, and transmits the configuration information to the main station in response to a request from the main station.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 shows a configuration of a transmission system used in a drive device interface system according to an embodiment of the present invention. 1
A main station is provided with a drive control unit 2 for controlling the drive unit and a drive monitoring unit 3 for monitoring the operation state of the drive unit. Reference numeral 4 denotes a drive device for controlling the motors 5, and there are as many as the number of motors. The drive device 4 is divided into a number of blocks in a predetermined unit, and one local station 6 is provided for each block. The local station 6 is connected to the plurality of drive devices 4 in the block and the respective electric signal paths 7.
The control information and the operating state information of the drive device 4 are
And exchange data. Data transmission is performed using an optical transmission line 9 via a repeater 8.

The operation of transmitting the control information of the drive device 4 from the main station 1 in the transmission system thus configured will be described. FIG. 2 is a diagram showing a transmission frame when transmitting control information from the main station 1. The transmitted data indicates the start of the data. "
Starting with a "start flag", data of "address", "control", "control information", and "FCS" are stored in order, and finally, an "end flag" indicating the end of the data is formed. , Destination local station 6
The address “control” indicates an identifier for determining what kind of the transmission data is. The "control information" stores control information for the drive device 4 connected to the destination local station 6, and its data length changes depending on the number of connected drive devices. “FCS” is a frame check sequence for confirming whether a transmission frame has been transmitted reliably. Drive control unit 2 in main station 1
Stores the address of the destination local station and the control information for the number of drive devices connected to it in the transmission frame shown in FIG.

Next, the operation of the local station 6 receiving the transmission data will be described. The local station 6 refers to the "address" in the transmitted transmission data, and if it matches its own address, reads out all the "control information" in the data and controls the connected drive devices. The information is allocated and expanded on a two-port memory in the local station 6. Thereafter, a response transmission according to the received content is performed from the local station 6. The main station 1 waits for a response from the destination local station 6 and transmits the control information to the next destination local station. At this time, the "address" in the transmission frame may be incremented to the address of the next local station of the transmission destination. As described above, even if one local station is used for a plurality of drive devices, control information can be transmitted to a plurality of drive devices in one transmission frame. Therefore, without lowering the control information transmission speed,
The cost of the system can be reduced by reducing the number of components such as the local station and the optical transmission line.

Embodiment 2 Hereinafter, in the second embodiment, in the transmission system shown in FIG. 1, the local station 6 transmits the operating state information of the drive device 4 to the main station 1 according to the control information from the drive control unit 2 of the main station 1. The operation of transmitting a response will be described. FIG. 3 is a diagram showing a transmission frame when transmitting the operation state information of the drive device 4, and includes "start flag", "address", "control", "local station address", "operation state information", "". FCS ",
And an "end flag". "address"
Is set to a broadcast address. "control"
Indicates that this transmission frame is a frame storing the operation state information from the local station 6, and the "local station address" stores the address of the local station 6 of the transmission source. The “operating state information” includes the drive device 4 connected to the local station 6 itself, which is stored in the two-port memory of the local station 6 of the transmission destination.
Are stored. The local station 6 transmits the transmission frame to the main station 1
By transmitting a response to the drive control unit 2 within the main unit, the main station 1 obtains operating state information of a plurality of drive devices 4 at a time. Further, it is possible to request the next local station for the operation state information of the drive unit connected thereto, and to quickly obtain the operation state information of all the drive units. Therefore,
Control functions for all drive devices can be performed quickly.

Embodiment 3 Hereinafter, in the third embodiment, in the transmission system shown in FIG. 1, the drive monitoring unit 3 of the main station 1
A monitoring operation for requesting the history information of the operation state information from the server will be described. FIG. 4 is a diagram showing a transmission frame when transmitting a command for collecting history information of operating state information, and includes "start flag", "address", "control", "drive device address", "command", It consists of “history information request item”, “FCS”, and “end flag”. In the “address”, the address of the local station 6 of the transmission destination is set. “Control” includes an identifier indicating that this transmission frame is a frame storing a command for collecting history information, and “Drive device address”.
Stores the address of the drive device to which a command is to be given among the drive devices 4 connected to the destination local station 6. However, the number of drive devices to be commanded may be one, a plurality of devices, or all devices, and the number of drive devices to be commanded can be specified at a time. The “command” stores information for designating any one of collection start, collection stop, and transfer of history information. "History information request item"
Is information for designating items of history information to be collected from among a huge number of information items, and is stored using data types, packet numbers, and the like.

Drive monitor 3 of main station 1
Transmits the transmission frame as described above to the local station 6. On the other hand, the local station 6 can individually collect and store the history information reception of the drive device connected thereto, and starts collecting the history information of the specified drive device 4 according to the received data. Stop collection or transfer. When the transmission frame is received, a status such as collection of the history information, collection completion, etc. is attached, and information on the collection of the history information is transmitted to the drive monitoring unit 3 in response. FIG. 5 is a diagram showing a transmission frame when the local station 6 transmits information related to the collection of history information to the drive monitoring unit 3 in response to “start flag”, “address”, “control”, and “local station address”. , "Drive device address", "collection status", "history information", "FCS", and "end flag".

[0018] In the "address", a broadcast address is set. “Control” stores an identifier indicating that this transmission frame is a response frame to the transmission frame of the history information collection command shown in FIG. "
The “local station address” and the “drive device address” are the address of the source local station 6 and the address of the responding drive device 4. The “collection status” includes history information being collected, being transmitted, and collection completed. The status related to the history information collection is stored in the "history information", but the history information requested to be transferred from the drive monitoring unit 3 is stored, but nothing is stored when the transfer is being performed. When the transfer request frame of the history information collected from is received, and the transfer of the history information of the corresponding drive device is performed, the transfer request frame is divided into several packets and transmitted. The local station follows the instructions in the “history information request item” in the transmission frame. The history information of the drive can be individually collected and stored, and the history information of the drive device requested from the main station can be promptly transmitted. Since the data is transferred separately for each item, monitoring control can be performed without delaying the update cycle of control information transmission.

Embodiment 4 As described in each of the above embodiments, in the present invention, since a plurality of drive devices are connected to one local station, how many drive devices are connected to which local station in the main station. It is necessary to hold in advance configuration information such as whether the drive is set and to which address each drive device is set, and check the actual setting state at the start of operation or the like. Therefore, the local station 6 automatically recognizes that a drive device is connected, and generates configuration information such as the number of drive devices and connection points on its own configuration table. The main station 1 holds the preset configuration information of the local stations 6 and the drive devices connected to them. At the start of operation, the main station 1 transmits the transmission frame shown in FIG. ,
Request the actual configuration state at that time. In the figure, the "address" stores the address of the local station 6 requesting the configuration information. Also, “control”
An identifier indicating that this transmission frame is a frame for requesting configuration information.

The local station 6, which has received the transmission frame shown in FIG. 6, transmits the configuration information generated on its own configuration table to the main station 1 in the transmission frame shown in FIG. In the figure, “address” is a broadcast address, and “control” is an identifier indicating that this transmission frame is a frame including configuration information. The “local station address” is the address of the source local station, and stores its own configuration information in the “configuration information”. Main station 1
Receives the transmission data shown in FIG. 7 and compares the configuration information of the local station held in advance with the configuration state at the present time to check for a setting error or the like.

[0021]

Since the present invention is configured as described above, it has the following effects.

Since data is exchanged between one local station connected to a plurality of drive units and the main station, the number of local stations and system components can be reduced, and the cost can be reduced.

Further, the main station transmits the drive control information by designating the destination local station, and the designated local station transmits the received drive control information to all of the drive units connected thereto. , Control information can be transmitted from the main station to a plurality of drive devices at a time, and control can be performed quickly.

Further, since the local station transmits individual operating state information of the drive device connected thereto to the main station at a time, the main station can update the operating state information in a shorter time. .

Further, the local station can individually collect the history information of the drive units connected to the local station and transfer the history information of the drive units requested by the main station. Can be monitored.

Further, since the local station transfers only the history information items specified by the main station, the transmission can be performed in a short time, and the monitoring function can be realized without affecting the update cycle of the drive device operating state information. it can.

Further, the local station can generate configuration information such as the number and position of the drive devices connected to itself, and transmits the configuration information at that time to the main station. By comparing the configured configuration with the received configuration information, it is possible to quickly check for a setting error or the like.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a transmission system used in a drive device interface system according to an embodiment of the present invention.

FIG. 2 is a diagram showing a transmission frame from a main station according to Embodiment 1 of the present invention.

FIG. 3 is a diagram showing a transmission frame from a local station according to Embodiment 2 of the present invention.

FIG. 4 is a diagram showing a transmission frame from a main station according to Embodiment 3 of the present invention.

FIG. 5 is a diagram showing a transmission frame from a local station according to Embodiment 3 of the present invention.

FIG. 6 is a diagram showing a transmission frame from a main station according to Embodiment 4 of the present invention.

FIG. 7 is a diagram showing a transmission frame from a local station according to Embodiment 4 of the present invention.

FIG. 8 is a system configuration diagram used for conventional drive control.

[Explanation of symbols]

1 main station, 2 drive control unit, 3 drive monitoring unit, 4 drive device, 5 motor, 6 local station, 7 electric transmission line, 8 repeater,
9 Optical transmission line.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H572 AA05 BB06 BB07 BB10 EE03 HC01 HC07 JJ03 JJ17 KK05 5K048 AA08 BA23 DA02 DA07 DA08 DC08 EB02 EB12 HA01 HA02

Claims (6)

[Claims] In an interface system between a drive device for controlling a motor and a main station for controlling and monitoring the drive device, a plurality of the drive devices are divided into predetermined units (blocks). A drive device interface, wherein each block includes one local station to which a drive device in the block is connected, and data is exchanged between the local station and the main station in each block. method. 2. The main station transmits drive device control information by designating a destination local station, and the designated local station transmits the received drive device control information to all drive devices connected thereto. 2. The drive device interface system according to claim 1, wherein the data is transmitted to the drive device. 3. The local station stores individual operating state information of a drive device connected to the local station,
3. The drive device interface system according to claim 2, wherein the stored operating state information is transmitted to the main station at once according to the drive device control information from the main station. 4. The main station transmits history information command information (collection start / collection stop / transfer) by designating a local station to which a drive device from which history information is to be collected and a drive device to which the drive device is to be connected. The local station collects (starts, stops, and transfers) the history information of the drive device in accordance with the received history information command information (starts, stops, and transfers). Claims 1 to 3
The drive device interface method according to any one of the above. 5. When the history information command information (collection start / collection stop / transfer) is transmitted from the main station, the requested history information item is specified, and the local station collects only the specified history information item. 5. The drive device interface method according to claim 4, wherein (collection start / collection stop / transfer) is performed. 6. The local station holds configuration information such as the number and position of drive devices connected to itself,
6. The drive device interface system according to claim 1, wherein the configuration information is transmitted to the main station in response to a request from the main station.