8. USAGE EXAMPLE
IMR01Y09-E3
81
8.4.2 Explicit message communication (When the SYSMAC CJ)
In order to conduct Explicit message communication using the OMRON SYSMAC CJ PLC,
the FINS command for FINS communication (communication protocol developed by
OMRON) is used.
For the FINS command and the CMND instruction, see the Instruction Manual of OMRON
SYSMAC CJ PLC.
Communication requirement
The vendor code is read from the COM-JH (slave). (RKC vendor code: 394 = 018AH)
•
Using the “Explicit message send” command (2801) of FINS command.
•
The “CMND instruction” is used to send FINS commands.
•
Write location of request data from the PLC (master):
On and after D01000
•
Storage location of response data from the COM-JH (slave): On and after D02000
•
The completion code is stored in D00006 when execution of CMND has been completed abnormally
and then the command is executed again.
•
When an Explicit message is sent by the SYSMAC CJ, the send location of the FINS command is
assigned to the DeviceNet master unit of its own node instead of the actual send location (COM-JH).
The COM-JH node address is specified within Explicit message send command data.
FINS command
CMND
CPU unit
DeviceNet master unit
Unit No.:
0
Node address: 05
Unit address: FEH or 10H
SYSMAC CJ
Explicit
message
COM-JH
Node address: 11
