Explicit Message Communications - YASKAWA SGD7S Product Manual

 Command Error
This bit changes to 1 if an error is found in the command data in a command message. The
method to use to clear command errors depends on the setting of the 12th bit of the action
definition settings in PnBA5.
• PnBA5 bit 12 = 0:
Clear the Valid Data bit in the command messages to 0.
• PnBA5 bit 12 = 1:
The command error is cleared automatically when the command data in the command mes-
sage is corrected.
 Response Assembly Code
The response assembly code defines the response data in bytes 4 to 7.
Refer to the following section for details on the response assembly code.
Command Format on page 13-5
 Axis Instance
The axis instance is always set to 1 (the axis number).
 Response Data
The response data is set to the data that is defined for the response assembly code.
13.2.2

Explicit Message Communications

This section describes messages that are used to read and change attributes. These are
required for explicit message communications.
Command Format
The following table gives the command format for explicit messages.
7
0
0
 MAC ID
Specify the node address of the device to receive the message.
 Service Code
Specify the code of the requested service (edit, read, etc.).
 Class ID
Specify the class ID of the object from which to request the service.
 Instance ID
Specify the instance ID of the object from which to request the service.
6 5 4
0/1
Instance ID
Attribute ID
Service Data

13.2.2 Explicit Message Communications

3 2
MAC ID
Service Code
Class ID
13.2 Communications Methods
1 0
13
13-11