Omron CJ1W-DRM21 Operation Manual page 61

Precautions for Safe Use
Make sure the scan list is enabled when you use the master function.
This will allow you to check whether slaves are online or not from the CPU Unit so that you will be
able to determine whether or not the DeviceNet communicates properly.
Additional Information
You can turn OFF (disconnected) remote I/O communications with a specified slave by changing
*_CnctCmd (Disconnect/Connect Switches) to TRUE when a slave is replaced or is registered in
the scan list prior to connection. These switches, however, are changed to FALSE when the
power supply is turned OFF, however, so a bit must be turned back to TRUE from the user pro-
gram when the power turns ON for it to be valid again.
Using the Slave Function
To use the slave function, the *_Sw2SlavEnblCmd (Slave Enable Switch) must be changed to TRUE
from Sysmac Studio.
With fixed allocations or allocations set in the device variables for CJ-series Unit, slave communications
must be disabled prior to area allocation and must be enabled following the area allocation.
The order of the procedure is thus Slave Stop Switch (if slave communications are enabled), area allo-
cation, and Slave Enable Switch.
Note Enable slave communications through CJ1W-DRM21 properties if you use a CX-Integrator.
CJ-series DeviceNet Units Operation Manual for NJ-series CPU Unit(W497)
1 Features and System Configuration
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