I just started using the HMI. I added an extra DigitalPanelMeter #2, reading the variable N7:0.
When I run the program it shows the value for N7:0 in the beginning, but once in a while I get the message
"INVALID VALUE RETURNED, Requested source in use". Then suddenly the program stop running and I get the messageIO Exceptiontion was unhandle" &
"The requested resource is in use".
Micrologix 1200 with two serial ports
DF1 Full Duplex, on Channel0
DigitalPanelMeter1 is reading T4:0.acc
DigitalPanelMeter2 reading T4:1.acc no problem
DigitalPanelMeter2 reading N7:0, or F8:0 I get the error.
Removed DigitalPanelMeter1, and reading F7:0 with DigitalPanelMeter2, then it works OK.
I tried to stop (unload) RSLINX, still the error.
Any ideas what to try next?
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