
OMRON Tech Note
Setting up AB Point I/O with CS1W-DRM21 10/19
Software, Contd.
• If your DRM21 has the left decimal point ON, then no scan list is being
used.
• If your DRM21 has the left decimal point OFF, then a scan list has been
registered and must be cleared/cancelled before proceeding
• If registered, use a PRO27 or CX-Programmer to
1. Put the PLC in the ‘Program’ mode
2. Toggle the ‘clear scan list’ bit (in this example, bit 1575.01)
3. The DRM21 should blank its display and return with the left decimal
ON
• By now the 1734 Adapter should be stabilized and ready to proceed
• Using the PRO27 or CX-Programmer (still in the ‘Program’ mode)
1. Toggle the ‘create scan list’ bit (in this example, bit 1575.00)
2. The DRM21 module should quickly blink off its display and then
show it node number along with two solid green LEDs (MS and NS)
• If this does not show, refer to manual W380 Section 8 ‘Troubleshooting’
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