Command/Response Blocks - Omron OMNUC W Series Manual

6 DeviceNet Communications

6.8.2 Command/Response Blocks

6.8.2 Command/Response Blocks
6
This section describes details of Explicit Message command/response blocks when the CS/
CJ-series DeviceNet Master Unit is used.
Command Block
The Explicit Message command block is shown below.
01
28
Command
code
Service code
Destination node address
Response Block
The Explicit Message response block is shown below.
Normal Response
When a normal response is returned to the sent Explicit Message, the response block is
shown below.
28 01 00 00
Command Response
code code
Error Responses
The following response is returned if an error occurs for the Explicit Message.
01
28 00
Command Response
code code
*
For DeviceNet error codes, refer to 10.3.3 Error Codes for Message Communications.
6-66
Class ID
Instance ID
(Object)
No. of bytes
received
Service code
Source node address
00
No. of bytes
received
Service code
(94 fixed)
Source node address
Service data
(Attribute No. or
attribute No.+ data)
Service data
94
Error code