JP2005033670A - Field network system, its device id setting method, setting tool, and motor drive - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for setting a new device ID via a network even when a device ID of each of nodes is the same, in the case of initially starting a field network system. <P>SOLUTION: Each of the nodes comprises a node ID holding means 9j for holding the node IDs for designating a communication destination and a communication source, a device ID holding means 10j for holding a device ID that becomes identification information as an FA apparatus, and a device ID setting value holding means 11j for holding a preset value. A communication means low-order layer 4j in each of the nodes comprises an automatic node ID assigning means 6j for automatically assigning a value of the node ID when initiating the field network and a topology information collecting means 7j for collecting topology information in the assignment, and a communication means high-order layer in each of the nodes comprises a device ID setting means 8j for setting the value of the device ID when initiating each of the nodes. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a field network system that combines a motor drive and a setting tool for setting a device ID of the motor drive, and more particularly to a method for setting a device ID.

In an FA system consisting of multiple motor drives such as servo drives and inverter drives that support field network communication functions, a setting tool that can generally set parameters and display data for each motor drive via the field network ( (Also called engineering tools).
The setting tool includes a keyboard for input operation, a monitor for displaying a screen, and a pointing device such as a mouse.

  FIG. 6 is a block diagram of a field network system of a conventional FA system. In the figure, 1 is a field network using a serial cable, 2 is a setting tool, and 31 and 3i are motor drives. Here, i is 1, 2,... N, and represents the first axis, the second axis,. 2, 3i are one of communication nodes. 200, 201, and 20j represent device IDs. Here, j is 0, 1, 2,..., N and 0 is a setting tool, 1 or more represents the first axis, second axis,... N axis motor drive.

  Here, the node ID, which is an inter-node communication address, and the device ID (axis number, etc.) for identifying each device in the FA system, which is a higher function of the node ID, are used without distinction and are preset in advance. The device ID is the same for each motor drive in one FA system. For this reason, since the setting tool cannot communicate normally with each motor drive at the initial startup of the FA system, a setting switch or operation panel is provided on the motor drive to set the device ID or connect to the local setting tool. A communication port is prepared separately, and a local setting tool is connected to set a device ID.

Alternatively, using the function disclosed in Japanese Patent Laid-Open No. 09-200210, one motor drive 3i for each setting tool 2 is connected to the field network, and device IDs are sequentially set. (For example, see Patent Document 1, Non-Patent Document 1, and Non-Patent Document 2)
JP 09-200210 (page 3-3, FIG. 1) PROFIBUS Specification (No. 0.032) Edition 1.0, 1998, p. 704 Issue: PNO (PROFIBUS International) DeviceNet Specifications (Release 2.0), 1997, Volume I p. 5-51-5-52: Open DeviceNet Vendor Association, Inc.

In the conventional field network system, at the initial startup of the FA system, the node ID and device ID are set prior to communication by means such as a separate setting switch, operation panel, and communication port for local setting tool connection on the motor drive. It was necessary to keep. Alternatively, there is a method in which device IDs are sequentially set by connecting to the field network one by one, but in any case, there is a problem that the setting work is complicated and the load is large.
The present invention has been made in view of such problems. From the initial startup of the FA system, a setting tool connected to the field network is used to set the device ID of the motor drive via the field network. It aims to provide a method that can be used.

In order to solve the above problem, the invention described in claim 1 is directed to a plurality of motor drives using a plurality of motor drives constituting an FA system, a setting tool for setting a device ID of the motor drives, and a serial cable. It consists of a drive and a field network that connects the nodes to each other using the setting tool as a node, and communicates with other nodes, and transmits and receives commands and parameters by the FA system function. In a field network system in which each node includes two layers of communication means comprising a communication means upper layer, each node holds a node ID for holding a node ID for addressing a communication destination and a communication source in a RAM. And a device that holds the device ID that is identification information as the FA device on the RAM. A device ID holding unit and a device ID setting unit for holding a preset value in a nonvolatile memory, and the node ID is automatically assigned to the lower layer of the communication unit of each node when the field network is activated. A device for setting the device ID at the time of starting each node in the upper layer of the communication means of each node. And an ID setting means.
The invention according to claim 2 is the field network system according to claim 1, wherein the lower layer of the communication means is IEEE1394.
According to a third aspect of the present invention, there are provided a plurality of motor drives constituting the FA system, a setting tool for setting a device ID of the motor drive, and the plurality of motor drives and the setting tool using a serial cable. A communication device lower layer that communicates with other nodes, and a communication means upper layer that transmits and receives commands and parameters by the FA system function. In the field network system provided with the two-layer communication means consisting of the above, each node reads the setting value of the device ID, and if the read setting value is a predetermined code, the node ID value is predetermined. The calculation is performed, and the calculation result is used as the device ID.
According to a fourth aspect of the present invention, in the motor drive connected as one of the communication nodes to the field network system according to the first aspect, the setting value of the device ID is read by the communication means upper layer service, It is characterized by writing.
According to a fifth aspect of the present invention, in the setting tool for setting a device ID of a motor drive connected as one of the communication nodes to the field network system according to the first aspect, the communication means upper layer service provides: 5. The motor drive according to claim 4, which is also connected to the field network, commands the device ID setting value to be read, performs a predetermined calculation on the read value, and writes the calculated value to the motor drive. It is characterized by giving a command.
For this reason, since the motor drive can set the device ID via the field network at the initial startup of the FA system, it is not necessary to set the device ID in advance, and the device ID setting work load at the initial startup is reduced. It can be made.

  According to the field network system of the present invention, if the initial setting of the device ID setting value of the motor drive is set to a predetermined code, the device ID setting value of all the motor drives connected to the field network at the initial startup of the FA system. Even if the same, the temporary device ID can be set based on the unique node ID in the field network automatically assigned by the node ID automatic assigning means, and normal communication can be performed. It is not necessary to set the device ID locally or connect to the field network one by one and sequentially set the device ID, so that the device ID setting work load at the initial startup can be reduced. In addition, even if the motor drive itself does not have a setting switch, operation panel, communication port for connecting the local setting tool, etc., the device ID of all motor drives can be set using the setting tool via the field network. Effective for downsizing, weight reduction, and cost reduction. In particular, a very high effect can be obtained when starting up and adjusting an extremely multi-axis motor drive system of 30 to 100 axes.

  Hereinafter, specific examples of the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram of a field network system of the FA system of the present invention. This figure shows only the part related to the field network of the setting tool and motor drive. In the figure, 1, 2, and 3i are the same as those in FIG. On the RAM, there are a node ID holding unit 9j for temporarily storing the node ID and a device ID holding unit 10j for temporarily storing the device ID, and a device ID that is initialized in advance is stored on the nonvolatile memory. There is a device ID set value holding means 11j. 4j is a communication means lower layer, 5j is a communication means upper layer, and node ID automatic assignment means for automatically assigning the node ID of each node to the communication means lower layer 4j when the field network is activated when the FA system is started up. 6j, there is topology information collecting means 7j for collecting topology information of each node. The communication means upper layer 5j has a device ID setting means 8j, which calculates the device ID of each node from the value of the node ID holding means 9j and the value of the device ID setting value holding means 11j, and sends it to the device ID holding means 10j. Store. Here, j is 0, 1, 2,..., N and 0 when the setting tool, 1 or more represents the first axis, the second axis,... N-axis motor drive.

  FIG. 4 shows an upper layer communication service message example 1000 exchanged between the communication means upper layer 5j and a lower layer communication service message example 1010 exchanged between the communication means lower layer 4j. In this embodiment, the upper layer communication service message includes a transmission destination device ID 1001, a transmission source device ID 1002, an upper layer control code 1003 indicating the content of the message, that is, the communication service, an upper layer PDU (protocol data unit) 1004, and an upper layer. It consists of a layer trailer, and a device ID is used as an address during communication. Examples of the upper layer communication service include a parameter read service and a parameter write service, and the contents of the device ID set value holding unit 11j can be set / changed using these services. The lower layer communication service message includes a transmission destination node ID 1011, a transmission source node ID 1012, a lower layer control code 1013, a lower layer PDU 1014, and a lower layer trailer 1015. The node ID is used as an address during communication. . As an example of the lower layer communication service, there is a device ID read service in addition to an upper layer packet transmission service that simply transmits an upper layer packet on a lower layer PDU.

The operation of the present invention will be described step by step with reference to FIGS.
FIG. 3 is a device ID setting flowchart when the field network is activated when the FA system is started up. When the device ID setting tool 2 and the motor drive 3i connected to the field network 1 are activated, the nodes of all the nodes connected to the field network are activated by the actions of the node ID automatic assigning means 6j in the communication means lower layer in steps 3001 and 4001. An ID is assigned and the result is written in the node ID holding means 9j in each node (2 and 3i). When IEEE1394 is adopted as the communication means lower layer, the topology information collecting means 7j works simultaneously in this step to edit the topology map of the entire network. (See IEEE Std. 1394-1995)

  Next, in steps 3002 and 4002, the device ID setting means 8j of the communication means upper layer 5j works individually in each node and sets the device ID in the device ID holding means 10j of the own node. A detailed flowchart in this case is shown in FIG. 2 and will be described later.

  FIG. 5 shows a device ID setting screen 5000 of the setting tool when performing the following steps. The screen is divided into a topology display panel unit 5006 and a selected node information display panel unit 5007. The topology display panel unit 5006 displays connection information and ID information of the setting tool 2 and the motor drive 3i based on the topology map. (5001 to 5005) When a node for which a device ID is to be set is selected on this panel by using a mouse or a cursor, the ID information of the selected node is displayed on the selected node information display panel unit 5006. A device ID can be set by inputting a set value in the ID input field 5008.

  Next, returning to the explanation of the next step in FIG. 3, the setting tool 2 sends a device ID read request in the lower layer communication service message (1010) based on the node ID of the motor drive 3i in step 3003 to all the motor drives 3i. Send to. Receiving this, the motor drive 3i reads the value of its own device ID holding means 10j in step 4003, and returns the device ID value read during the device ID read response of the lower layer communication service message as a response. The setting tool 2 displays the device IDs of all motor drives on the topology display panel unit 5006 of the device ID setting screen 5000. The operator who knows the information on the entire device ID selects the object whose device ID is to be changed with the mouse or the like on the topology display panel unit 5006. The selected target node ID and device ID are displayed on the selected node information display panel unit 5007, and the operator changes the device ID displayed in the device ID input field 5008 using the keyboard. Then, the setting tool 2 sets a parameter write request in the upper layer communication service message (1001) and transmits it to the current device ID. In step 4004, the motor drive 3i receives this request, reads the device ID value that the operator wants to set set in the parameter write request, and writes it in its own device ID setting value holding means 11j. Furthermore, a parameter write response is returned. In this way, the device ID setting of one node of the motor drive 3i is changed.

  Next, a flowchart of the device ID setting unit 8j in FIG. 2 will be described. The device ID setting unit 8j is activated individually for each node in steps 3002 and 4002 in FIG. 3. First, in step 2001, the value of the device ID setting value holding unit 11j of the own node is read. In step 2002, this value (device ID setting value) is determined. If it is a predetermined code (for example, 0xFF, etc.), this node is regarded as a node that has been initially set at the time of shipment, and the process proceeds to step 2004. The value is read from the node ID holding means 9j. In step 2005, a predetermined calculation is performed based on this value (a unique node ID value in the field network set by the node ID automatic setting means) (for example, the node ID + 0x80 or the node ID value may be used as it is). The calculation result is set as a temporary device ID and written in the device ID holding means 10j. On the other hand, if the predetermined code is not determined in step 2002, it is determined that one or more device ID setting values have already been set. In step 2003, the value is directly stored in the device ID holding unit 10j. Write.

  In this way, even when there are a plurality of motor drives 3i that are initially set at the time of shipment, unique device IDs are automatically assigned based on the node IDs uniquely assigned in the field network. The setting tool 2 connected to can write a new device ID to be set via the field network using this device ID. Thus, if the initial setting of the device ID setting value of the motor drive 3i is set to a predetermined code, the device ID setting values of all the motor drives 3i connected to the field network at the initial startup of the FA system are the same. In addition, the temporary device ID can be set based on the unique node ID in the field network automatically assigned by the node ID assigning means 6j, and normal communication can be performed. It is not necessary to set the device ID sequentially by connecting to the field network one by one, and the device ID setting work load at the initial startup can be reduced.

  The difference between the present invention and Patent Document 1 that is the prior art is that a node ID and a device ID are distinguished, and a temporary device ID can be created based on the node ID. In the prior art, when there are a plurality of motor drives having the same device ID, communication by a field network is not possible. However, in the present invention, communication by an upper layer of communication means is possible using a temporary device ID.

  Since the present invention can communicate correctly even when there are a plurality of devices having the same device ID in the field network system, the present invention is not limited to a motor drive, and is a system in which FA devices such as robots, NCs, PLCs, etc. are connected by a field network. Is also applicable.

The block diagram of the field network system of FA system of the Example of this invention Device ID setting means flowchart of the embodiment of the present invention Device ID setting flowchart according to an embodiment of the present invention (a) Setting tool flowchart (b) Motor drive flowchart Communication data format of an embodiment of the present invention Device ID setting screen of setting tool of embodiment of the present invention Block diagram of a field network system of a conventional FA system

Explanation of symbols

1 Field network 2 Setting tool 3i Motor drive (servo, inverter, etc.)
(I = 1, 2,... N)
4j communication means lower layer (j = 0, 1, 2,... N)
5j Communication means Upper layer 6j Node ID automatic assignment means 7j Topology information collection means 8j Device ID setting means 9j Node ID holding means (on RAM)
10j Device ID holding means (on RAM)
11j Device ID setting value holding means (on nonvolatile memory)
20j Device ID
1000 Upper layer communication service message 1001 Data format: Destination device ID field 1002 Data format: Source device ID field 1003 Data format: Upper layer control code 1004 Data format: Upper layer PDU (protocol data unit)
1005 Data format: Upper layer trailer 1010 Lower layer communication service message 1011 Data format: Destination node ID field 1012 Data format: Source node ID field 1013 Data format: Lower layer control code 1014 Data format: Lower layer PDU (protocol data unit )
1015 Data format: Lower layer trailer 2000 to 2007 Steps 3000 to 3005 of the device ID setting means processing flow Steps 4000 to 4005 of the setting tool side device ID setting procedure Steps 5000 to 4005 of the motor drive side device ID setting procedure Device ID setting screen 5001 to 5005 Node information 5006 Topology display panel section 5007 Selected node information display panel section 5008 Device ID input field

Claims (5)

A plurality of motor drives constituting the FA system;
A setting tool for setting the device ID of the motor drive;
A field network that interconnects the plurality of motor drives and the setting tool as nodes by using a serial cable;
Consists of
A communication means lower layer for communicating with other nodes;
Upper layer of communication means for sending and receiving commands and parameters by FA system function;
In the field network system provided with the two-layer communication means comprising:
Each node has a node ID holding means for holding a node ID for addressing the communication destination and the communication source on the RAM;
Device ID holding means for holding a device ID serving as identification information as an FA device on the RAM;
Device ID setting means for holding a preset value on the nonvolatile memory,
Node ID automatic assigning means for automatically assigning the node ID at the time of starting the field network to the communication means lower layer of each node;
Topology information collecting means for collecting topology information at the time of allocation,
A field network system comprising: a device ID setting unit configured to set the device ID when each node is activated in the upper layer of the communication unit of each node.     The field network system according to claim 1, wherein the communication means lower layer is IEEE1394. A plurality of motor drives constituting the FA system;
A setting tool for setting the device ID of the motor drive;
A field network that interconnects the plurality of motor drives and the setting tool as nodes by using a serial cable;
Consists of
A communication means lower layer for communicating with other nodes;
Upper layer of communication means for sending and receiving commands and parameters by FA system function;
In the field network system provided with the two-layer communication means comprising:
A field network system that reads a set value of the device ID, performs a predetermined calculation on the value of the node ID if the read set value is a predetermined code, and sets the calculation result as a device ID Device ID setting method.   2. A motor drive connected to the field network system according to claim 1 as one of the communication nodes, wherein a set value of the device ID is read and written by the communication means upper layer service.   5. The device ID set value for the motor drive according to claim 4, wherein the device ID is connected to the field network system according to claim 1 as one of the communication nodes and is also connected to the field network by the communication means upper layer service. A setting tool for setting a device ID of a motor drive, which performs a predetermined calculation on the read value, and issues a write command to the motor drive after the calculation.