Odd problem, I have a panel with a Red Lion Graphite controlling (among other things) 8 control techniques commander sk drives. I am communicating with them via MODBUS, with the drives set up for PR (preset speeds). I am writing into the drives parameter 18 (400121) the speed setting - preset 1.
Alll works fine, except when powered down and back up, the screen remembers the speed setting (retentive on the tag), but only one of the drives remembers the preset 1 speed setting - all the rest go to zero. If you change the setting on the Red Lion, all the drives take it and run fine.
I see no parameter difference at all between the drives (except the address obviously).
I just can't sort out why one drive retains the setting and the other ones do not.
Alll works fine, except when powered down and back up, the screen remembers the speed setting (retentive on the tag), but only one of the drives remembers the preset 1 speed setting - all the rest go to zero. If you change the setting on the Red Lion, all the drives take it and run fine.
I see no parameter difference at all between the drives (except the address obviously).
I just can't sort out why one drive retains the setting and the other ones do not.