Applies To:
  • CitectSCADA 4.xx, 5.xx

I am using the Getcp driver and Citect v5.01, but I don't seem to be able to write a string longer than 8 characters to the GE Fanuc PLC.  What could be the problem? 

The problem is due to the fact that the protocol which Getcp is using cannot carry more than 8 bytes of data (to write strings longer than 8 characters) in a single request. The solution to the problem is to break a long string into smaller fragments inside the driver so that each fragment contains less than 8 characters in length and the driver writes them to the PLC one by one in a row. This operation is transparent to the user.

CIT has confirmed this to be a problem in Getcp driver prior to driver version 2.12 and this problem has been fixed in driver version 2.12