henkauto

I didn't realize I declared the struct I was writing to as an INOUT variable in the application .. solved the problem..

Same thing here. Every so often a write command seems to not be processed by the PLC. Regardless of single write of multi var write. Only happens to S7-1500. Tried with S7-1200 and this PLC does not experience this problem. Also tried different firmware versions of S7-1500. Wireshark shows the write command, and it is also confirmed by the PLC with a success, however, the actual value in the PLC is not changed. Any solution to this? EDIT: Ok, solution found.. I used the data I was writing to as a...

Same thing here. Every so often a write command seems to not be processed by the PLC. Regardless of single write of multi var write. Only happens to S7-1500. Tried with S7-1200 and this PLC does not experience this problem. Also tried different firmware versions of S7-1500. Wireshark shows the write command, and it is also confirmed by the PLC with a success, however, the actual value in the PLC is not changed. Any solution to this?

Hello Guys, I'm programming a application using Snap7 to communicate with the Siemens S7-400 PLC. It has a graphic user interface which is being controlled by some operators. However, periodically I get some random app crashes. On the links below you can see some images of the errors. Notice that the error sometimes seems to be caused by snap7.dll (0xC0000005) and sometimes the same error in clr.dll. https://ibb.co/gyGpnb https://ibb.co/bZbB0w https://ibb.co/fhsUnb https://ibb.co/cPkRYG Sometimes...

Hello Guys, I'm programming a application using Snap7 to communicate with the Siemens S7-400 PLC. It has a graphic user interface which is being controlled by some operators. However, periodically I get some random app crashes. On the links below you can see some images of the errors. Notice that the error sometimes seems to be caused by snap7.dll (0xC0000005) and sometimes the same error in clr.dll. https://ibb.co/gyGpnb https://ibb.co/bZbB0w https://ibb.co/fhsUnb https://ibb.co/cPkRYG I think it...