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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: Problems with soft motors |
| From: | Kevin Peterson <[email protected]> |
| To: | Mark Rivers <[email protected]>, "[email protected]" <[email protected]>, 'Andrew Johnson' <[email protected]> |
| Cc: | EPICS tech talk <[email protected]> |
| Date: | Fri, 7 Sep 2018 17:16:07 -0500 |
Mark, I've successfully reproduced part of your problem.My vxWorks 6.9.4.1 IOC is using a recent version of motor (https://github.com/epics-modules/motor/commit/8b5d5f92bd1e91fe750401f921bea71cb0d815db) and calc-3-7-1.
The problem doesn't occur when I use base-3.15.5. When I switch to base-7.0.1.1, I see the following behavior:
* The DMOV of the "difference" soft motor is immediately reset to 1 when that soft motor is moved * The DMOV of the "difference" soft motor is fixed at 1 when a real motor is moved * The VAL of the "difference" motor fails to synchronize with the RBV when a real motor is moved
The readback of the "difference" soft motor seems to always be correct. The "average" soft motor behaves correctly.
I see the same behavior with MAXv, OMS and simulated motors. I've loaded one instance of the pseudoMotor support for each pair of motors on each of those controllers and I don't have any "difference" soft motors that behave correctly. I also haven't yet found a case where the RBV field of a soft motor fails to update.
I'll hopefully have more time to debug this next week. Kevin On 09/06/2018 06:23 PM, Mark Rivers wrote:
- I reverted the entire IOC application to the version I was running in the last run (3.15.5, master branch of synApps from January 2018) and all of the soft motors work fine. This seems to prove it is some software change in base 7.0.1 vs 3.15.5, or a change in synApps since January. But it is NOT the motor record itself.