YASKAWA SGD7S Product Manual page 420

13.2 Communications Methods
13.2.2 Explicit Message Communications
 Attribute ID
Specify the attribute ID of the object from which to request the service.
The following services of the Command Block objects (class ID = 0x27) do not have attribute
IDs: Get_Attribute_All (service code = 0x01) and Set_Attribute_All (service code = 0x02).
 Service Data
Set the data that is required by the service, such as the data to write to the attribute of the
object from which the service is being requested. Set the lower byte first.
The service data depends on the service that is being requested.
Response Format
The following table gives the response format for explicit messages.
7
0
1
 MAC ID
The node address of the device that sent the message is specified.
 Service Code
The code of the requested service (edit, read, etc.) is specified.
 Response Service Data
The data from the requested service, such as read data, is set with the lower bytes first and
then the higher bytes.
The response data depends on the service that was requested.
13-12
6 5 4
0/1
Response Service Data
3 2
MAC ID
Service Code
1 0