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7-1
CJ-series Serial Communications Units Operation Manual for NJ-series CPU Unit(W494)
7
This section describes the procedure and other information required to use Modbus-
RTU Slave Mode.
Communicating with NJ-series CPU Units Using Modbus . . . . . . . . . . . . . . . 7-3
7-2 Device Variables for CJ-series Unit and System-defined Variables
Device Variable for CJ-series Unit for System Settings . . . . . . . . . . . . . . . . . . 7-5
Device Variable for CJ-series Unit for Software Switches . . . . . . . . . . . . . . . . 7-8
Supported Modbus-RTU Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13
Command and Response Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14
Using Modbus-RTU Slave Mode