UNISTREAM RESTART FROM LADDER LOGIC

[KENNEDY WESONGA]

Am Having some  frequent "freezed " comms in unistream  MQTT and the only way i  solve them is by PLC   reboot. Is there anyway that i can restart my Unistream PLC from Ladder Logic.I can then  build logic to resolve the comms freezes

[Flex727]

This is another feature available in the Vision series, but not available with UniStream (at least as of the last time I asked). It's a feature that needs to be added.

[kratmel]

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.