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UNISTREAM RESTART FROM LADDER LOGIC


KENNEDY WESONGA

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In CNC machine external hardware WatchDog is used for power off machine if something wrong happend.

In your case you can write some code for generate cyclic watchdog reset signal on some Unistream output if MQTT is OK.

This signal can reset external 24v powered NC timer (best way to use timer with two setpoint that generate power off and power on to Unistream +24V power supply) . 

You can also use another output to bypass external watchdog timer if user do not use MQTT and do not need to restart.

Or if restart happend to many times.

One problem - set timer setpoint correctly - Unistream must have time to restart MQTT and generate  watchdog reset signal.

 

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