Applies To:
  • CitectSCADA 5x, 6x, 7.0

When using CitectSCADA, OPC arrays less than 10 elements regardless of data type comes up with #COMS. If the array is larger or equal to 10 elements, Citect connects ok. 

This problem effects driver versions less than and including V1.15.18.001. The solution is to define the array's address length using two digits rather than one.

For example, if an array of integers are defined in Citect with address TabMot!A[9], Citect fails to communicate. If address in Citect is specified TabMot!A[09], Citect is able to communicate.