Setting values for DINT/UDINT variables of the S7_NT Driver from zenon runtime to PLC leads to value 0 in both zenon runtime and plc.

Setting values for DINT/UDINT variables of the S7_NT Driver from zenon runtime to PLC leads to value 0 in both zenon runtime and plc.

Summary

Setting values for DINT/UDINT variables of the S7_NT Driver from zenon runtime to PLC leads to value 0 in both zenon runtime and plc. This behaviour occurs when the following prerequisites are given:

  • S7-Project created in Step 7 v. 55
  • SIMATIC.NET v13(.1)
  • zenon 7.20
   

Description

Setting values for DINT/UDINT variables of the S7_NT Driver from zenon runtime to PLC leads to value 0 in both zenon runtime and plc. This behaviour occurs when the following prerequisites are given:
  • S7-Project created in Step 7 v. 55
  • SIMATIC.NET v13(.1)
  • zenon 7.20
   

Solution

This issue was addressed by improving the way write requests are handled.

Issue Number: 36227
Fixed on Date: 5.4.2016
Versions: 7.20 0 BUILD 27570