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Author Topic: Offline PLC  (Read 1817 times)

clanman

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Offline PLC
« on: September 24, 2014, 08:04:18 AM »
Hi to all.

Being a newbie to this great package, I have a question maybe someone out there could answer.

I am using AdvancedHMI with Codesys V2.3.9 and 2 Eaton HMI/PLC on OPC comms.

If a PLC is offline, I get an exception error in Public Function Write

I have put on onerror resume next in which seems to work ok and Comms starts again when PLC is powered.

Is this an expected event.

Cheers.


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Archie

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Re: Offline PLC
« Reply #1 on: September 24, 2014, 08:44:35 AM »
It is normal for an exception to be thrown if the driver cannot read/write to the controller. Any read or writes should be inside an Try-Catch block.
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clanman

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Re: Offline PLC
« Reply #2 on: September 25, 2014, 04:10:28 AM »
Many thanks
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