Simply Modbus - Monitoring Software - Continental Control Systems, LLC

This is Modbus monitoring software for the PC.

All Modbus setup is done from one screen, so it’s simple to configure. It has fewer settings than Modscan32, which also simplifies configuration.
It has a “Send” button to manually send the register read command, which is useful for troubleshooting.
It shows a raw hex dump of the response received from the slave and can save it to a log file, which is useful for troubleshooting. At the same time, the 32-bit integer and/or float data types are displayed (though not logged), which is useful for helping programmers who are writing their own software to understand how Modbus register processing works.
It has a checkbox option for removing the command echo (presumably for old legacy RS485 adapters that might not allow disabling the echo).

Separate programs are required for the Modbus/RTU master and the Modbus client ($120 total cost).
Telnet and socket connections are not supported at all.
Can be used for displaying, but not for logging 32-bit integer, float and/or 16-bit integer data. Only a low-level hex dump of the response can be saved to the log file.
Only one slave can be polled at a time.
Only one block of registers can be polled at a time.
Demo version runs for a much shorter time than Modscan32’s demo version.
Data trend graphs are not supported.

Different 32-bit integer, float and/or 16-bit integer data types can be read from a single block of registers. However, this usually takes longer to setup (compared to just specifying one data type for all the registers in a block) since most slave device are designed to read the same data type from a given block of registers.

Simply Modbus – Monitoring Software