How to keep MCD Signal Mapping Connection alive during simulation and download of new PLC-code to (e.g.) PLCSimAdvanced?
Many times, RunTime error of type "Signal Mapping Connection" shows like: "Read tag failed" or "Failed to get instance information".
Solution
First Pause the MCD simulation, after that perform in TIA portal "Download to Device".
Once this is finished successful, UN-pause MCD simulation again.
When the new PLC-code is not significant changed, the connection information can stay alive during download, but a time-out threshold may cause connection issues. Currently (since NX 1872) 20 seconds time-out threshold is used. This value may change in the future releases of NX.
Notes and References
Hardware/Software Configuration
Platform: na
OS: windows
OS Version: 1064
Product: NX
Application: MECHATRONICS
Version: V1872
Function: SIGNAL
Ref: 001-9784601