Looking at using an E-series HMI (probably E-1060) with a AnS based PLC
Does anyone know if there is a way that the PLC can be programmed so that it can detect that comms with the HMI have failed?
This is so that the PLC can default the equipment to a safe state in the event of a failure.
Thanks.
Full Version: AnS and E-1060
You should make the terminal update the PLC clock (you can set up the terminal to download the clock to your preferred dataregister), and then check that the value(s) are updated (e.g. the dataregister which shows seconds)..... If the dataregister fails to update within a given interval, the comm link is down.
Go to "Setup->Date Time Format....." in E-Designer
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Go to "Setup->Date Time Format....." in E-Designer
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QUOTE (kaare_t @ Oct 29 2009, 05:07 PM) 
You should make the terminal update the PLC clock (you can set up the terminal to download the clock to your preferred dataregister), and then check that the value(s) are updated (e.g. the dataregister which shows seconds)..... If the dataregister fails to update within a given interval, the comm link is down.
Excellent. Many thanks kaare_t
Chaz
Just remember that the clock occupies 6 or 7 dataregisters (if you use D0, it will also occupy D1-6)..... Year, Month, Date, Hour, Minute, Second.... 
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