Skip to content

Exception code 2 "Illegal data address" and "Modbus checksum (CRC) invalid" from ModBus RTU FB

[Deleted User][Deleted User]
in PLCnext Engineer

Hello,

I'm trying to read and/or write a holding register for the current date from a ModBus slave (MAG X2 Flowmeter from arkon) using the function blocks MB_RTU_FC3 and FC16 but I get those error codes:

image.png
image.png

However, I'm able to read and write other registers without problem like "language" for example. The format of the register I want to read/write is:

image.png

Thanks.

Sign In or Register to comment.