Modbus Illegal Data Value

[Ian@GWTi]

Hi,

I have an error in modbus. (write failed: Illegal Data Value) when writing to the register.  Reading works fine.

  {
      "name": "Machine On/Off",
      "address": 1280,
      "bus_datatype": "bool",
      "datatype": "uint16",
      "type": "register",
      "writable": true,
      "value_bitmask": "0x8"
    },

Any ideas would be apricated.

Thanks

[Daniel]

Add "write_bitmask": true,