TornOff comannd send no TLV commands to laser. PLC only set a BIT on the Ethercat. You can check this if you go online and the show on peripheral site under Peripheral._send.LaserOn. If this set to False, then the command was set correct. The error comes if after 5 seconds no answare from laser comes. This you can check under Peripherals._recv.StateDecode.LaserOn. The lib check this variable. If this not set to false, the error from your picture comes.
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