With Modbus Poll you can monitor and test your modbus slave devices. It supports RTU and ASCII mode, tests Center for modbus slave developers, it has multiple windows for monitoring of multiple slaves or data areas and Monitoring of serial traffic. Data logging to a text file readable by MS Excel.
Modbus Poll is a Modbus simulator designed primarily to help developers of Modbus slave devices or others that want to test and simulate the Modbus protocol. With the multiple document interfaces you can monitor several Modbus slaves and/or data areas at the same time. For each window you simply specify the Modbus slave ID, function, address, size and poll rate. You can read and write registers and coils from any window. If you want to change a single register, simply double click the value. Or you can change multiple registers or coils. Multiple data formats such as float, double and long with word order swapping are available. In Modbus Poll exception errors are shown on the status line.