Communication between a SLC505 and a 22-Comm-E AB VFD

[Foxhat]

Hi Ken,

Thanks for taking the time to help me. I'm new to the SLC5/05 environment and I'm still missing a part of the puzzle.

You indicated that I should only need 3 MSG commands to make a single drive work. In the example you provided, where does the speed reference and actual speed come into play? Are they part of the first write on line 0002 of your example?

Sorry to prolong this but I'm hoping to wrap this up so I can get home by Friday.



Thanks to both of you for your generous help. It is much appreciated.

BLS

 

[fuzzy logic]

Foxhat, in the useful example coming from Ken, the rung 002 is used to write to the drive the Command Word and the Reference.

N7:3 must contain Logic Command Bits and it is moved to N41:0 by MSG write
N7:4 is unused and it is moved to N41:1
N7:5 must contain the Reference and it is moved to N41:2 in the drive

In line 001 he uses EEM to get the Logic Status and Feedback from drive:
N7:0 will contain the Logic status bits
N7:1 is unused
N7:2 will contain the Feedback

Instead of this new instruction (EEM) you may use another message, reading from N41:0 to N41:2 to get the same infos from drive.

- [font=comic sans ms,sans-serif]fuzzy logic[/font]

 

[Foxhat]

Gents,

Thanks for all of your help. The system is working great!

Regards,

BLS