Detect a not running PLC with HMI

[Zimmbo]

Hi all,

is there any watchdogs or item to get a information in web-iq, if the plc or the connection to plc is not fine?

I search for a methode to detect this issue with the HMI.

If it possible to code a TON-timer that have a look to a toggle bit from PLC?

[webiq-sk · Accepted solution]

You can use the Heartbeat widget for that. Just setup a PLC item that changes every second for example and set the widget to expect a change at least every two seconds. If the PLC item is not updated anymore or cannot be read the heartbeat widget will show an error and you can also attach anything you want using UI Actions, like displaying a dialog etc. and hide the dialog when it is available again.