seeigecannon
Member
Hello. I am new with PLCs, and I am working on modifying code for a non-production system with no safety implications.
We are using an Allen-Bradley Micro850 and a PanelView800. We are using Connected Components Workbench for the programming.
We have gotten burned a couple of times before with the PLC being in programming mode and not working, but the display has no indication that the PLC is not running. I have tried linking an indicator on the display to "__SYSVA_RESMODE" which indicates what state the PLC is in (and is a global variable), and is independent of the run state, but when I try to link it in the display tags it says "System Variables not supported".
I have considered copying the global system variable to a regular global, but it wouldn't be updated if the program were to stop.
Does anybody have an idea how to read system variables with a display? If somebody knows of a better workaround then I am game for that too.
Thanks for taking the time to read this.
We are using an Allen-Bradley Micro850 and a PanelView800. We are using Connected Components Workbench for the programming.
We have gotten burned a couple of times before with the PLC being in programming mode and not working, but the display has no indication that the PLC is not running. I have tried linking an indicator on the display to "__SYSVA_RESMODE" which indicates what state the PLC is in (and is a global variable), and is independent of the run state, but when I try to link it in the display tags it says "System Variables not supported".
I have considered copying the global system variable to a regular global, but it wouldn't be updated if the program were to stop.
Does anybody have an idea how to read system variables with a display? If somebody knows of a better workaround then I am game for that too.
Thanks for taking the time to read this.