Write Modbus data
Use ModbusDoctor to easily test the system → Modbus Doctor - KScada
Configuration
In the settings : TCP/IP address : µWiotys IP - Numport : 502 - Timeout : 1000.
To write value into Modbus device previously configured, select your slave number in modbus doctor.
Get adresses infos (Watteco IN’O exemple)
Address | Size | Description | Type |
|---|---|---|---|
0x2100 (8448 in DEC) | 1 | output 1 : current state | uint16 |
0x2101 (8449 in DEC) | 1 | output 1 : New state (write) | uint16 |
What you can see on Modbus Doctor:
The output state sent by sensor is 0.
Write value
We can write TRUE (1) to activate the output 1 :
On the µWiotys interface, in the Downlink menu of your sensor, you could see the created Downlink.
If the Downlink is sent, it will disappear from the interface and you couldn’t see it anymore.
The downlink message is sent through these steps : Modbus client (write Modbus register value)→ µWiotys (generate downlink and send to) → Sensor.