Contec F&eIT Series User Manual page 60

Command generation (transmitted data)
Identifier = "SV"
Version = 1
Command = 1h
Sequence number = 1
Response ID = 1234
Virtual address = 0000h
Access size = 32
Access ID = Read ID
Response frame (received data)
Identifier = "SV"
Version = 1
Command = 81h
Sequence number = 1
Response ID = 1234
Virtual address = 0000h
Access size = 32
Status = 0000h
Data = "CONTEC CO.,LTD."
Figure 8.5. Read Procedures
- Writing to a virtual address (command = 2)
A virtual address and its size are specified, and the frame is transmitted to the target device. The
result is received as a response frame status. (Example: setting an IP address)
Command generation (transmitted data)
Identifier = "SV"
Version = 1
Command = 2h
Sequence number = 1
Response ID = 1234
Virtual address = 1008h
(refer to [Control Information]
on the details)
Access size = 4
Access ID = R/W ID
Data = 192.168.132.31
Response frame (received data)
Identifier = "SV"
Version = 1
Command = 82h
Sequence number = 1
Response ID = 1234
Virtual address = 1008h
Access size = 4
Status = 0000h
Figure 8.6. Write Procedures
CPU-CA10(FIT)GY, CPU-CA20(FIT)GY
READ request
For the read operation,
either "Read ID" or
"Read/Write ID" is used.
Response
Copies the contents of the transmission header response ID.
When multiple commands are simultaneously issued, the
response ID in the response frame is referenced in order to
validate it with the command that was issued.
WRITE request
For the write operation,
"Read/Write ID" is used.
Response
8. System Reference
Device
Device
53