boolean ModBus_RequestRead (integer $InstanceID)
|InstanceID||ID of the device to be switched|
|If the command succeeds, it returns TRUE, otherwise FALSE.|
Executes a new read for the device with the ID InstanceID.
Once the function has been performed, the new values are available in the state variables.
//Read out device with the ID 12345 ModBus_RequestRead(12345);