Machsupport Forum

Mach Discussion => Mach4 General Discussion => Topic started by: brianthechemist on February 27, 2023, 06:46:47 PM

Title: Modbus Gurus help... what is "195 - Unknown Error"
Post by: brianthechemist on February 27, 2023, 06:46:47 PM

Hi everyone,

I'm using the modbus plugin to talk to my VFD and I had it working last friday... I have been seeing some flaky behavior in the plugin, sometimes in the config screen it will not save my changes after I press "ok".  I'm wondering if there is a bug or something. (Version 4746)

Somehow now I get an incorrect value for a register read and this "195 - Unknown error" for the write. 

Both functions work perfectly well in the "CAS Modbus Scanner" that I have been using to troubleshoot.

Any thoughts?

Title: Re: Modbus Gurus help... what is "195 - Unknown Error"
Post by: brianthechemist on March 01, 2023, 10:43:32 AM

I fixed this, the registers were 1 off due to not adjusting the addresses after enabling the ‘zero based addressing’