Check Map
Run deterministic register-map checks
Problem
Invalid read block boundaries
A read block can become invalid when its start and quantity cross the server's defined data range.
Why it matters
The official protocol defines exception 02 for an invalid address and transfer-length combination. A Pymodbus discussion shows users working to restrict undefined register ranges.
What to do
Sources
- Modbus Application Protocol modbus.org
- Pymodbus discussion #2268 github.com