Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Wed, 19 Mar 2003 09:00:33 -0600

Lifang Zheng wrote:
> Dear all,
>  
> Could somebody explain about the restriction of  naming channels from 
> the history of EPICS developing? I learned from APS web site, the total 
> length of channel name should be less than 28 characters. Do EPICS base 
> & CA library support different length of channel names? Is there any 
> modification in EPICS new versions for the limits?
> Is there any limit in the character length between two delimiters(:) 
> among channel name?
> Any information is welcome.
>  
> Regards,
>  
> Lifang

For R3.13 the name must be <= 28 characters.
For R3.14 the name must be <= 60 characters

I believe that CA has no limits on channel names. Jeff can verify.

Warning:

If you use 3.14 and have channel names longer than 28 characters some Channel
Access clients may break. Also you may not be able to dynamically modify soft links.

Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System