KENNEDY WESONGA Posted November 6, 2020 Report Share Posted November 6, 2020 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 Quote Link to comment Share on other sites More sharing options...
MVP 2023 Flex727 Posted November 7, 2020 MVP 2023 Report Share Posted November 7, 2020 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. Quote Link to comment Share on other sites More sharing options...
MVP 2023 kratmel Posted November 7, 2020 MVP 2023 Report Share Posted November 7, 2020 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. Quote Link to comment Share on other sites More sharing options...
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