Documentation
Busscope documentation
Guides for testing Modbus devices with Busscope, and reference pages for the things that go wrong.
Reference
Modbus exception codes
Every exception code from 01 to 0B, what causes it and what to try, and how to tell an exception from a timeout.
Changelog
What changed in each version of Busscope.
Guides
Modbus TCP tester
Connect to a device, poll coils and registers, write with confirmation and read the frames on the wire.
Modbus RTU tester
Serial settings, RS-485 echo removal and RTS toggle for Modbus RTU and ASCII devices.
Modbus register poller
Several poll windows on one connection, with formats, names, colors, live charts and logging.
Modbus/TCP Security (TLS)
Connect to secured devices with TLS 1.2 or newer, client certificates and a CA file.
Need something that is not here?
Write to support@busscope.com. Questions that come up more than once become pages on this site.