How to implement on-demand reading?

[38368423]

I have a scenario like this: a Modbus device has a large number of parameters that need to be maintained, but I cannot read all the parameters every time, as that would affect the reading of other data. Therefore, I would like to read the parameters only after clicking a “Read Parameters” button on the interface. How can this be implemented?

[manjey73]

try to split the parameters into two devices, mydev1.1 and mydev1.2, and specify the second as command reading in the Communicator settings. well, and link the team.

[Mikhail]

Hi,
This is possible.
In Communicator, set the Poll only on command checkbox for the device.
To do a poll, send a command with the code App.Comm.PollDevice and the device number as a command value.

[Mikhail]

As written above you need to split Modbus parameters into several devices (in terms of Rapid SCADA).

[Author]

Posts