Voltage Sensor Data, Transfering to SEL RTAC using Modbus over serial (RS485 or RS232)

[John Ward]

Hello everyone,

I have a senior project and the goal of this project is to create a voltage sensor and transfer that data to our RTAC device connected to our SCADA. We have code that transfers the data into our voltage source and need to transfer that data into our RTAC. Don't know much about Modbus and would love any help!

Thank you in advance

John

[Shivam]

First if  u want to send data over modbus then you need address, slave id and length..mean decide one address for  sensor to read data and create slave id means sensor id and length means how many sensor data you want to send..like example:- like u said u have one voltage sensor to send data to modbus...let 1000 is the address  of voltage sensor and 1 is salve id and 1 is length because u only have one sensor to send data... Just use write register to send data...check pymodbus client example to understand how it working.

And one more thing in modbus u have modbus master and modbus slave.

Read pymodbus documentation for more understanding. If still u have any query please feel free to ask.

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[John Ward]

So using this line of code. What would I need to do exactly? Would I implement pymodbus functions into this source code? Sorry very new to this

Code Used 

    https://osoyoo.com/driver/voltage.py