write to modbus with bitmask

[jeroen@stevens.biz]

Try using multiple register write instead:

Code:

value = 4 -- bit 2 set to 1
res, err = mb:writemultipleregisters(33471, value)
log(res, err)

I get this output now:
* arg: 1
  * number: 1
* arg: 2
  * nil
I see the alarms are reset this way. Thanks.

---

Hi,

You can use your setbit script but instead of writing direct to modbus by script you should write the output value of your script to a virtual object and use the modbus template mapped to this virtual object.

Hi Erwin,

The reset works with the writemultipleregisters in the script. Now I want to move on to the profile way as you suggested.
1/ Is it sufficient to add to the modbus profile something like this:
    {
      "name": "reset flow error (err 20)",
      "bus_datatype": "int16",
      "datatype": "int16",
      "type": "register",
      "address": 33471,
      "writable": 1,
      "value_bitmask": 0x4
    }
and then link that to a virtual object?
2/ I've set the polling interval of that device to 55 seconds. Is then the value of the object written to the device every time? I'm asking because now I use a script to write values, but only when they change (like the setpoint for the cooling depending on the dewpoint).

Greets