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  1. S7-300/400 Status to Wonderware

    I've been tasked with building several "maintenance" related HMI screens in our Wonderware application for systems running on S7-300 and S7-400 PLCs. I'd like to provide an overview of general PLC status for all PLCs, displaying this type of information: LED StatusStatus of Communication to WonderwareI/O FaultsModule faultsetcFirst on my list was LED Status. I found a Siemens tech document describing how to determine the status of each LED on the processor via PLC programming, but it occurs to me that it's pointless to do so for the Run or Stop LED's - if it's not in the Run state, then the code will not execute, therefor the HMI will always display a healthy status for those two LED's. I'm referring to a Siemens document entitled "Programming Example in Ladder Logic, Getting the Status for the CPU LED Indicators." It would be nice to be able to indicate if a PLC was faulted/stopped. Does anybody out there know of a way to do this with Wonderware? I'm fairly new to Siemens and Wonderware (mostly AB and iFix experience), so detailed answers will be much appreciated!
  2. I have had a GE 90-30 CPU331 in my house for 17 years with no trouble at all. I have a problem that I have never seen before. I was editing the program using LM90. I don't know what I could have done in the program to disable an output. Just 1. All the rest of the points in that group on that card still work. I swapped cards with no difference. All of the elements of the rung are true (highlighted). The output is not on or highlighted. The nickname over the output has ONE letter highlighted. The bit in the reference is "0" and is highlighted or "grayed out" (the cursor is not on it). I searched for coil conflicts. I am using this output contact lots of places but only one output. The logic is working correctly when I use another output or %M. This is an isolated output which needs to be in this group (moving it would be awkward). What does a "grayed out" reference bit mean?