Get datapoint value control uses "Get service" to retrieves one or more datapoint values and returns their current values as obtained from the edge device rather than relying on a “last known good” value stored somewhere.
This example shows setting of datapoint value control(Write Request) and Get datapoint value control(Read Request).
Sequence of Operations are:
Modbus Device Creation and Provisioning
Write request (Set Datapoint Value)
Read Request (Get datapoint Value using Get service)
1. Modbus Device Creation and Provisioning
To perform get/set datapoint operation device needs to be provision. After successful provisioning device is fully operational and we can get/set data-point values.
Set datapoint value request will be initiated by User/CMS. This request will be sent to modbus engine, to change the value of datapoint "Demand_Reset" which belongs to interface block number 3 of amik_rtu modbus device.