Experimental Physics and
Industrial Control System

"Rarback, Harvey M." <[email protected]> · Thu, 15 Jul 2010 16:32:23 -0700

	Ernest,

> We are currently using "Motor Record Version 5.9"
> on some of our stepper motor applications.
> 
> We would like to use the motor software with USE READBACK enabled.
> We are connecting our calibrated LVDT to the READBACK link.
> 
> What has been your experience in using this feature of the Motor Record?

At SPEAR we are using motor record 6.22.  All our motors use the readback link to external encoders.  Although we have had some issues with callbacks going astray with soft motors (ask Till!), the external readback links seem to work ok.

> When using READBACK inlink for Motor position sensing:
> (1) Selecting YES/NO does not update the motor record properly.
> Should the software actually copy the contents of MOTOR.VAL to MOTOR.RBV
> If READBACK is toggled back to "NO"
> 
> If the READBACK is set to "YES" then "MOTOR.RDBL", should be copied to
> MOTOR.RBV ?

I believe your problem is "YES" is not equal to "Yes".  It bit me too ;-)

                                  --Harvey

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System