EPICS Home EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

Format page
for printing


Search Tech-talk
1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  <2015>  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  <2015>  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>
Subject: RE: about Galil controller in linux-64bit system
From: LiuP <[email protected]>
To: "'Mark Clift'" <[email protected]>, <[email protected]>
Date: Thu, 21 May 2015 11:58:20 +0800

Thank you, Dr Clift.  The firmware version of DMC 2183 is Q.

As you said, I change the third parameter from 8 to -10. But it doesn’t work. I tried to use other update period, such as ‘’1’’

GalilCreateController("Galil", "192.168.1.22", 1)

 

I got the right response of the readback PV. It’s almost keep up with the motor’s motion. My problem is gone.

Then I test other values, such as 6,7,9,12,17,18,20,29,38,60. It seems if you set the value between 8 and 18, you will get the wrong feedback. Others should be ok.

 

I also try to compile the Galil v3-1 driver, but there are some errors because  l don’t have C++ 2011 in my linux PC.

 

Mark Clift [mailto:[email protected]]
2015-5-20- 21:06
LiuP; [email protected]
RE: about Galil controller in linux-64bit system

 

Dear Liu Ping,

 

>From your description it sounds as though the data records are being sent from the controller faster than the driver poll cycle is occurring.  The gcl communications library from the Galil website, which the EPICS driver uses, does buffer the data records.  So if the EPICS driver is not keeping up, a lag will develop, and get worse.  I've seen this case during early development, and suggest the driver is not usable until that is fixed.  Something is delaying the poller in your case?

 

I've been unable to reproduce this fault on CentOS 6.4 64 bit.  I will try with CentOS 6.5 64 bit soon.

 

What is the firmware version on the 2183 controller?  The EPICS driver is tested with 2183 revision S firmware.

 

Finally, how is the EPICS driver poller set up in your case?  Could you show me the GalilCreateController

call you use? You could force the poller into synchronous mode by specifying a negative poll cycle period, and compare that with the asynchronous mode.



Also, the version 3-1 version of the EPICS driver does not use the gcl from the Galil website for communications.

Instead, the EPICS Asyn module is used for communications in 3-1, and there is no data record buffering. However, I'd like to reproduce this poller fault in 3-0 here too, and get it fixed.



I also recommend that you don't use the linux version of GalilTools to connect with the controller, it leaves

the communication handles open. This problem has been fixed in the Windows version of GalilTools.



Best wishes,



Mark

 

Dr. Mark Clift

Senior Controls Engineer

Australian Synchrotron

800 Blackburn Road

Clayton 3168

Ph: +613 8540 4264

Fax: +613 8540 4200

From: LiuP [[email protected]]
Sent: Wednesday, 20 May 2015 16:47
To: [email protected]
Cc: Mark Clift
Subject: about Galil controller in linux-64bit system

Hi, all

 

The Galil-v3.0 SoftIOC works well in CentOS6.4 32Bit system. But when it run in CentOS6.5 64Bit platform, there is one problem.

Set the motor PV "BL14B1:EH:GALIL:A.VAL" from 0 to 100, the motor is moving and stop after a while. But the response of the readback PV "BL14B1:EH:GALIL:A.RBV" (Encoder counts) is very slow. As the camonitor shows below, it spent almost 90 seconds to get the final position feedback 99.72. Except the first 3 seconds, during the last 87 seconds, the motor kept at a standstill. Observing the readback pv on the edm interface, it'same.

 

Details:

Galil - 2183 controller

Galil -V3.0 App ( https://github.com/motorapp/Galil-3-0/releases/tag/V3-0)

Galiltools.x86_64.rpm

EPICS Base 3.14.12.4

SynApps_5_7

CentOS 6.5 x86_64 64bit

 

Everthing is ok in 32bit system. Why not in 64bit system?

 

################################################################

[blctrl@BL14B1-EX iocGalil]$ camonitor BL14B1:EH:GALIL:A.RBV

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:04:51.407462 0

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:05:59.130087 0.36

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:00.771175 1.08 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:02.530912 2.16 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:02.927468 2.52 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:02.937029 3.6 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:03.575116 4.32 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:03.762514 5.4 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:05.465514 6.48 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:06.873518 7.2 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:08.137867 8.64 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:08.272796 9.72 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:08.904386 10.8

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:09.505998 12.24 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:09.818511 13.68 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:09.872235 14.76 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:10.279506 16.2 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:11.348856 17.64 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:13.310518 19.08 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:13.435513 20.88 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:13.872735 21.96 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:14.013388 23.4 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:14.980559 24.84 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.011857 26.28 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.012204 27.72 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.014297 29.16 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.014583 30.24 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.014834 32.04 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.015112 33.12 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.015402 34.56 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.015674 36 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.015923 37.44 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.021128 38.88 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.021317 40.32 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.021534 41.76 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.028130 43.2 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.028321 44.64 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.262379 45.72 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:15.980549 47.16 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:16.011832 48.6 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:16.014270 50.4 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:16.021010 51.48 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:16.028005 52.92 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:16.036806 54.36 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:16.037138 55.8 

...

...

...  

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:22.206448 99

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:22.208181 99.36 

BL14B1:EH:GALIL:A.RBV          2015-05-20 11:06:22.208420 99.72

##################################################################

 

 

LIU Ping

Beamline Contrl Group, SSRF

No. 239 Zhangheng Road, Pudong, Shanghai

 

Replies:
RE: about Galil controller in linux-64bit system Mark Clift
Navigate by Date:
Prev: Re: EPICS web GUIs using websockets Jon Brinkmann
Next: Re: EPICS web GUIs using websockets Jani Hakala
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  <2015>  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: RE: about Galil controller in linux-64bit system Mark Clift
Next: RE: about Galil controller in linux-64bit system Mark Clift
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  <2015>  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 16 Dec 2015 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·