In Vijeo Citect ver 7.40 , I have configured trend tag using local variable tag with some calculations, but this doesn`t shows on the trend page when I start runtime in multi process. How can I solve
There are some limitations with the Local Variable tags that each process has its own copy of each local variable configured in the project and the values in a local variable are available only to the process that wrote them. So due to this in Vijeo Citect you were getting this problem mostly when you start runtime in multi process mode.
To use any internal tag for calculation purpose you can configure a Persistant Memory IO Device and use the tags that were defined in that IO device to serve the purpose.