Re: I implemented the Model 3 of EPICS motor driver support, but the VAL and RBV of motor record are zero after IOC reboot.

[Torsten Bögershausen via Tech-talk <tech-talk at aps.anl.gov>]

Hej,

without having seen ypur code, I would speculate that you run
into a not-unknown issue using Model 3 motors, connected via
a serial cable, USB or Ethernet?

The value that the motorRecord needs is read from the driver,
wich must have been able to read it from your hardware.
Here are ESS we have a patched motor, which can handle this.
If you use the upstream version, the easist workaround may be
to add a sleep() after the createController() line in your st.cmd

HTH
/Torsten


On 2024-11-20 09:47, LiangChih Chiang via Tech-talk wrote:
> Hello, EPICS mates.
>
> I implemented the Model 3 of EPICS motor driver support for some motor 
> controller,
> but the VAL and RBV of the motor record are zero after IOC reboot.
>
> I think the motor record doesn't restore the values of motor pulse and 
> encoder count from the motor controller after IOC reboot.
> What member functions of asynMotorController and asynMotorAxis classes 
> should I implement?
>
> Best regards.