Receiving Explicit Messages - Omron CJ1W-DRM21 Operation Manual

6 Message Communications
6-3

Receiving Explicit Messages

CJ-series DeviceNet Unit contains a PLC Object. The Unit will receive messages addressed to the PLC
Object, process service requests addressed to the CPU Unit, and return responses.
The following services are provided by the PLC Object.
• CPU Unit status read/write
• CPU Unit I/O memory read/write
The explicit messages can be received from the following sources:
• DeviceNet masters made by other manufacturers
• PLCs with C200H-series DeviceNet Master Units (C200HW-DRM21-V1)
• PLCs with CVM1/CV-series DeviceNet Master Units (CVM1-DRM21-V1)
• NJ-series PLCs with CJ-series DeviceNet Units
• CS/CJ-series PLCs with CS/CJ-series DeviceNet Units
Example
NJ-series CPU Unit
CJ-series DeviceNet Unit
DeviceNet
Note Status and the I/O memory read/write operations cannot be performed for PLCs with a
C200H-series or CVM1/CV-series DeviceNet Master Units. The CPU Unit of a CS/CJ-series
DeviceNet Unit can also send an explicit message to read/write I/O memory of PLCs with
C200H I/O Link Units.
6-16
C200H-series DeviceNet Master Unit
C200HX/HG/HE
CPU Unit
Explicit messages can be
received
Explicit message
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
DeviceNet master made by
other manufacturers