Applies To:
  • CitectSCADA x.x
Summary:
I am trying to multilink two OMRON LK101 units on RS422. My project runs fine for one unit but I can't communicate with the second unit. 

Solution:
Remove the -s special option from the Ports form.

Yes! I did that and then both units crashed?

OK on the LK101, LK201 and LK202 there is a switch on the bottom of the PLC which is the hardware equivalent of the -s option. Make sure that this switch is in the off position for multilink operation. You will have to remove the PLC from the rack to access this switch.

 
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