Applies To:
  • CitectSCADA

We are facing problems with the OMRON driver communicating with an Omron CS1G-CPU43-EV1 PLC. The driver cannot read addresses higher than 10000.  

The Citect OMRON driver uses the Sysmac_way protocol, the protocol only supports reads and writes to DM in the range of 0000-9999. This is not usually a problem as most PLCs have less than 9999 DM channels. However, Omron CS1 has 32,000 DM channels and many other new memory areas which are not addressable with the Sysmac_way protocol.

The Citect OMFINS driver ( or higher) uses FINS protocol, which can access up to 32,000 DM channels.

See also KB Article Q1811.