=?gb18030?b?u9i4tKO6IHRoZSBzYW1lIHF1ZXN0aW9uIHRvICJh?==?gb18030?b?IHNpbXBsZSBxdWVzdGlvbiBhYm91dCBweWVwaWNz?==?gb18030?b?Ig==?=

["=?gb18030?b?s8nN/rvG5a0=?=" <2200593819@qq.com>]

Hi, Peter,

Thanks a lot!

I think that goes to the firewall or /and EPICS_CA_ADDR_LIST issue.

Anyway I follow your guideline and connection established.

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Ying Huang

Chengwei Lab&Engineering Company

No1 Xiantong Street, Youxian Area, Mianyang City, Sichuan Province, China

86 0816 2967213

 

------------------ Ô­Ê¼Óʼþ ------------------

·¢¼þÈË: "Peter Milne"<peter.milne@d-tacq.com>;

·¢ËÍʱ¼ä: 2018Äê8ÔÂ30ÈÕ(ÐÇÆÚËÄ) Á賿0:26

ÊÕ¼þÈË: "³ÉÍþ»Æå­"<2200593819@qq.com>;"tech-talk"<tech-talk@aps.anl.gov>;

Ö÷Ìâ: Re: the same question to "a simple question about pyepics"

Hello Ying Huang



On 29/08/18 17:10, ³ÉÍþ»Æå­ wrote:
> Plus, this is just a beginning of mine and I do not connect any  device on my laptop. I just try it on a Virtual Mechine and follow the  easiest example hoping to get the entrance.
> Hope to get feedback. Thanks in advance.
> -------------------------------------------------------
>
> Hi,
> I am just facing the same question with that email "a simple question about pyepics".
> OS is redhat6, python is 2.7.6
> Here is what I tried:
> 1,    [root@localhost linux64]# echo $PYEPICS_LIBCA
> /test/base/lib/linux-x86_64/libca.so
> 2,    [root@localhost linux64]# echo $EPICS_BASE
> /test/base
> 3,    [root@localhost linux64]# echo $EPICS_HOST_ARCH
> linux-x86_64
> 4,    in python I am typing
> Python 2.7.6 (default, Aug 28 2018, 07:42:21)
> [GCC 4.4.7 20120313 (Red Hat 4.4.7-16)] on linux2
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from epics import caget
>>>> m1 = caget('root:ai2')
> cannot connect to root:ai2
> 5,   PV named 'root:ai2' does exist
> iocRun: All initialization complete
> ## Start any sequence programs
> #seq sncExample, "user=root"
> epics> dbl
> root:xxxExample
> root:calcExample
> root:calcExample1
> root:calc1
> root:calcExample2
> root:calc2
> root:calcExample3
> root:calc3
> root:subExample
> root:aSubExample
> root:compressExample
> root:aiExample
> root:aiExample1
> root:ai1
> root:aiExample2
> root:ai2
> root:aiExample3
> root:ai3
>
>
>
> What can I do then?

I would try the standard epics Channel Access CA tools eg

https://epics.anl.gov/base/R3-14/12-docs/CAref.html#caget

from the command line
caget root:ai2

or

camonitor root:ai2

If that doesn't work, your problem is not pyepics, but CA in general.
Could be firewall or name resolution issue.

https://epics.anl.gov/base/R3-14/12-docs/CAref.html#firewall
https://epics.anl.gov/base/R3-14/12-docs/CAref.html#EPICS
EPICS_CA_ADDR_LIST=ip-addr

Cheers

Peter


>
>
>
>
> ------------------
> »Æ å­
>
>  
> *****¿ªÆ±ÐÅÏ¢*****
> Ãû³Æ£ºÃàÑô³ÉÍþʵÑéÊÒ¹¤³Ì¼¼ÊõÓÐÏÞ¹«Ë¾
> Ë°ºÅ£º915107 0455 1000 912T
> ×¢²áµØÖ·£ºËÄ´¨Ê¡ÃàÑôÊÐÓÎÏÉÇøÏÉÈË·һ¶Î32ºÅ
> ¿ª»§ÒøÐУºÖйúÒøÐÐÃàÑôÓÎÏÉÖ§ÐÐ
> Õ˺ţº1279 5046 6834
> *****ËÍ»õÐÅÏ¢*****
> µØÖ·£ºËÄ´¨Ê¡ÃàÑôÊÐÓÎÏÉÇøÓÎÏÉÕòÏÉͯ½ÖÒ»ºÅ£¬µçÉ̹È
> ÁªÏµÈË£º»Æå­
> µç»°£º18784065819
> ************************************************
>
> Ying Huang
> Chengwei Lab&Engineering Company
> No1 Xiantong Street, Youxian Area, Mianyang City, Sichuan Province, China
> 86 0816 2967213
>


--
Peter Milne
Director of Sales
www.d-tacq.com