Experimental Physics and
Industrial Control System

Hi Guobao,

In 2018, in the task of event timing system prototype of the HEPS-TF project, I built a test stand with MRF VME-EVM-300 and VME-EVR-300, and did a simple test of the delay compensation function.

Hardware platform:

MVME-5100

VME-EVM-300

VME-EVR-300

Software platform:

Debian 8.7 32-bit running in VirtualBox

vxWorks 6.8

PSI fork of mrfioc2 [1]

EPICS-3.14.12.3

devlib2-2.8

The caQtDM OPI (included in mrfioc2) developed by PSI was very straightforward and contained everything I wanted. I enabled the delay compensation mode in both VME-EVM-300 and VME-EVR-300 as well as some other configurations, and set a appropriate delay compensation target value to VME-EVR-300, then the internal FIFO in VME-EVR-300 did the compensation.

Actually, the only test I did was switching optical fiber from 3 meter to 6 meter, and it turned out that the compensation function worked properly. Due to my work assignment, I did not do any further test since then. Shortly, I will send you a memo document written in Chinese which records my test procedure. 

Regards,

Lin

[1] https://github.com/paulscherrerinstitute/mrfioc2

-----Original Messages-----
From:"Shen, Guobao via Tech-talk" <tech-talk at aps.anl.gov>
Sent Time:2020-02-19 02:43:22 (Wednesday)
To: Tech-Talk <tech-talk at aps.anl.gov>
Cc:
Subject: MRF Delay Compensation Function

Hi all,

Is there anyone who has been using MRF EVM-300 delay compensation function for any purpose, in the lab, test stand, real machine, etc?

If yes, would you mind to share us your experience?

 

Thanks,

Guobao

 

--------

Guobao Shen

gshen at anl.gov

Controls Group Leader

Advanced Photon Source

Argonne National Laboratory

9700 S. Cass Avenue, Lemont, IL 60439