Watchdog function

Watchdog function 1:
Block diagram for determining the output values (Watchdog function)

Watchdog function, Index 0x80n0:05

The EL40xx/EL41xx terminals are equipped with a safety device (watchdog) that switches the outputs to a defined state, for example in case of interrupted process data traffic.

The watchdog time is set via the general TwinCAT dialog

"Advanced Settings" -> General -> Behavior -> Watchdog -> "Set Multiplier" and "SM Watchdog":

Watchdog function 2:
Watchdog settings

A maximum watchdog time of 65 s is possible. Larger values are calculated modulo 65, for example 70 s would be shortened to 5 s.

Notice

Watchdog function 3:

General information on watchdog settings

Observe the general notes on the watchdog setting.

The procedure is as follows:

The following settings can be made for the substitute value in index 0x80n0:05: