Video: What is Modbus Tester and how do I use it?
Need a simple tool that can read Modbus registers.
Diagnosing communications or verifying values.
Modbus Tester is a simple register reading/writing program. The below screen shot details each commonly used value block, and the video below shows how to read and write to registers. Note: Modbus Tester is hardcoded to port 502.
Attached is a copy of the program.