Issue
Serial communications are not functioning on a Modbus daisy chain.
Product Line
Serial Devices
Environment
Windows OS
Resolution
Portman is a free application that monitors and displays all serial and parallel port activity on either the local computer on which it is installed or on a remote computer. Portmon understands all serial and parallel port I/O control commands and will display them along with interesting information regarding their associated parameters.
A typical application where Portmon is useful: monitoring packets in a serial daisy chain. Simply connect a serial device to a computer running PortMon. The serial device will then act as a sniffer and Portmon can capture packet traffic in the loop.
How to Run PortMon
- Run the PortMon executable (PORTMON.EXE)
- Select Computer > Connect to connect to a network computer or Connect Local to connect to the local machine
- Under the Capture menu, ensure that "Capture Events" is checked
- Under Capture > Ports, select a port to monitor
- Events at the selected port should appear in the PortMon window at this point
- When you are satisfied with the captured events, you can Save the log file for future review
Where to Download:
Portmon can be found on the Windows website by searching Portmon or by following this link: https://learn.microsoft.com/en-us/sysinternals/downloads/portmon.
Released for:Schneider Electric Egypt and North East Africa
