Experimental Physics and
Industrial Control System

Hinko Kocevar via Tech-talk <tech-talk at aps.anl.gov> · Fri, 19 Apr 2024 12:30:02 +0000

I'm playing around with the motor record (motorMotorSim) and how one could abort the motion in progress.

With initial position at 0 I do the following in three terminals ; executing commands one after another:

TERM1:
$ camonitor IOC:m1.RBV
IOC:m1.RBV                     2024-04-19 14:17:15.641496 0  
IOC:m1.RBV                     2024-04-19 14:17:22.458046 0.02  
IOC:m1.RBV                     2024-04-19 14:17:22.558330 0.09  
...
IOC:m1.RBV                     2024-04-19 14:17:37.500906 14.99  
IOC:m1.RBV                     2024-04-19 14:17:37.601177 15  

TERM2:
$ caput -l -c -w 20 IOC:m1.VAL 15
Old : IOC:m1.VAL                     2024-04-19 14:17:15.641496 0  
New : IOC:m1.VAL                     2024-04-19 14:17:37.601294 15  

TERM3:
$ caput -l -c -w 20 IOC:m1.STOP 1
Old : IOC:m1.STOP                    2024-04-19 14:17:23.059605 0  
New : IOC:m1.STOP                    2024-04-19 14:17:37.601294 0  

The TERM3 caput to .STOP is waiting TERM2 caput to .VAL to finish.

If the caput command in TERM3 is not using the ca_put_callback then the motor motion is aborted immediately as seen below:

TERM1:
$ camonitor IOC:m1.RBV
IOC:m1.RBV                     2024-04-19 14:24:48.447635 0  
IOC:m1.RBV                     2024-04-19 14:24:54.863364 0.02  
IOC:m1.RBV                     2024-04-19 14:24:54.963617 0.09  
...
IOC:m1.RBV                     2024-04-19 14:24:57.269834 2.3  
IOC:m1.RBV                     2024-04-19 14:24:57.370032 2.31  

TERM2:
$ caput -l -c -w 20 IOC:m1.VAL 15
Old : IOC:m1.VAL                     2024-04-19 14:24:48.447635 0  
New : IOC:m1.VAL                     2024-04-19 14:24:57.370032 2.31  

TERM3:
$ caput -l -w 20 IOC:m1.STOP 1
Old : IOC:m1.STOP                    2024-04-19 14:24:57.069324 0  
New : IOC:m1.STOP                    2024-04-19 14:24:57.085839 0  

can someone explain what is going on in the first case with caput command both using ca_put_callback ?

Thanks,
//hinko

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System