How to monitor S5 analog signal?

[presario2100 0]

How to monitor S5 analog signal PW XXX in Step5 programming software?

[Mike Dyble 0]

You cannot monitor PW's using the status or force variable functions. However if you look at the program where they are used and look at that in status mode you will see the values in the ACCU1 column. Failing that you will have to put in a small program mod to write the value to an unused flag or dataword. e.g. L PW160 T FW198 "New intruction" ...... Or find where the PW is written to. And to cover your other request on ZYK: Usually one of two causes, You have created an endless (or too long) loop in the code so that the program cannot complete in time. OR You hae a program where I/O failures are handled by one of the error OB's and dont cause a CPU stop, and there are a lot of failures which result in a massivly extended scan time due to the extra processing time. Mike