Loopback Test - Omron CJ1W-SCU32 Operation Manual

1 Introduction
Connectable Devices
The following serial communications modes are supported by the Serial Communications Units:
Protocol Macro, No-protocol, Modbus-RTU Slave, and Loopback Test Modes. You can also connect
the devices shown in the following diagram.
General-purpose
external device
General-purpose
external device
There is another serial communications mode, Serial Gateway, which enables connection with the
following devices.
CompoWay/F-
compatible
OMRON
component
CompoWay/F-
compatible
OMRON
component
1-4
Programming Host computer
Device
Programming Host computer
Device
Modbus-RTU-compatible
device (e.g., Inverter)
Modbus-ASCII-compatible
device (e.g., Servo)
Serial
Communications
Unit
Protocol
conversion
Protocol
conversion
Modbus-RTU-compatible
device (e.g., Inverter)
Modbus-ASCII-compatible
device (e.g., Servo)
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
Serial Communications Unit
NJ-series PLC
Message
CPU Unit
message