Sign in to follow this  
Followers 0
JiM_cz

Communication through CP1W-C1F11 "freezes up"

5 posts in this topic

Hello guys,

A machinery in my workplace uses  CP1H  with  CP1W-C1F11 card to set a speed via modbus of a VFD (Schneider ATV12). Everything works OK for a while and the Communications Status Indicator on the card flashes with about 1s interval. After a random time (sometimes 15 min, 25min..) the communication freezes up, the indicator stops flashing and the VFD ignores any changes in frequency that are sent to it from the PLC.

Any idea what might be the reason for the interrupted communication? 

Share this post


Link to post
Share on other sites

I believe this is the code. The first part is writing the frequency set point into the drive and at the second part is I think just some scaling. (Although not sure what the APR is there for)..

 

Edited by JiM_cz

Share this post


Link to post
Share on other sites

 

 

 

20190914_110648.jpg

Edited by JiM_cz

Share this post


Link to post
Share on other sites

When I check the error code D32252, the value is 100 (x4) and the manual describes it as: Serial communications mode error
The Modbus-RTU Easy Master function was 
executed when the serial communications 
mode was not the Serial Gateway Mode. 

Any idea how I can understand it?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0