PMM Modbus tester is a Modbus master/slave simulator that was created to assist Modbus device, developers and those who want to test and replicate the Modbus protocol. You can monitor many Modbus slaves/masters and/or data regions simultaneously using the multiple document interface. Simply provide the Modbus slave ID, function, address, size, and baud rate for each window. From any window, you may read and write registers and coils. Simply double-click the value of a single register to modify it. Alternatively, you can alter numerous registers/coils. There are several data types accessible, including float, double, and long, as well as word order shifting.