Modbus16 CRC Error

Serial and TCP terminal for engineering and debugging

Brought to you by: crun

#96 Modbus16 CRC Error

Milestone: V3.0.0.45

Status: open

Owner: nobody

Labels: Modbus (2) CRC (2)

Fixed_in_Version: Not Fixed

Priority: 5

Updated: 2019-04-06

Created: 2019-04-04

Creator: Ciro

Private: No

I noticed that there is a problem on modbus16 CRC calculation.
The CRC is sometimes wrong, in particular I have found an wrong CRC when one or more byte transmitted have a value greater than or equal to 128.
I'm using the 3.0.1.45 BETA2 version, but I also tried with the version 3.0.1.44 and the result is the same.
One example of byte stream is:
0x01 0x04 0x02 0x8A 0x00 0x02
the realterm appends the CRC "70 6D"
but the correct CRC should be "51 99"

Discussion

Simon Bridger - 2019-04-06

Reported before. I suspect cause is not CRC but some string handling error and same root cause as bug #95

If you would like to refer to this comment somewhere else in this project, copy and paste the following link:

Modbus16 CRC Error

Serial and TCP terminal for engineering and debugging

Fixed_in_Version

Version

Searches

Help

#96 Modbus16 CRC Error

Discussion