Modicon PLC IO scanning fault indicating bit ?

[charliehu 0]

Hello there, Our project is using a Schneider Modicon TSX P572634M processor for main control. At the moment, I'm trying to use IO scanning function to achieve communication with a M340 PLC, which is just working fine. But the problem is I can't find a digital bit to indicate the IO scanning failure. Anybody has any idea which bit can be used for this purpose? For example, when we use modbus, we can have proper comm report. What about IO scanning? Is there any similar report or debugging information? Thanks!

[Ken Moore 23]

I moved this to the Modicon forum, you should get a better response here.

[charliehu 0]

Thank you for putting my post in right place.

[billysmithde2 1]

Try to create a an IODDT variable of typeT_COM_ETYX103 at the ETYPort channel: %CH0.1.0. Inside this derived data type will be health bits for IOScanning (and other things). Edited 10 Feb 2012 by billysmithde2

[charliehu 0]

Thank you very much Billy, it works, solve my problem