Omron CS1W-PRM21 Operation Manual page 140

Configuring the Master
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3. When communication is achieved with the PLC, a warning window will be
displayed, notifying the user that the PLC will be switched to PROGRAM
mode. If the user confirms this, the download will continue.
4. The downloading process is handled by the Master DTM.
After successful download, the configuration will automatically be stored in the
Unit, after which the Unit will be reset, to allow the new configuration to be
loaded.
Note During the download, the Master Unit will switch to OFFLINIE.
Section 6-4