BadWriteNotSupported and TypeError: must be called with a dataclass type or instance about opcua-asyncio HOT 5 CLOSED

plc type and vendor?

from opcua-asyncio.

It should be a Schneider M241

from opcua-asyncio.

try to create the datavalue without servertimestamp!? the servertimestamp is usually the point in time in which the server recv that datapoint!

you can pass the dv to the write_value method!

https://github.com/AndreasHeine/opcua-tutorial/blob/main/client/write.py#L35-L42

from opcua-asyncio.

Hello,
that solved the issue

dv = ua.DataValue(
          ua.Variant(
              100, 
              ua.VariantType.Int16
          )
        )
await h_tmax_m2.write_value(dv)

I have one more question, my PLC is roughly 3 mins behind in terms of time right now. It seems like it has a drift.
Given how powerful and useful this library is i was wondering whether i could fix that.
What is the proper method to fix it? I do see there is a Status/CurrentTime variable which is not writeable. Shall i ask for a permission change or is there a more adequate method?

from opcua-asyncio.

most plc dont have battery buffered RTC.... so configuring a NTP-Server is the best option

from opcua-asyncio.