Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Wed, 21 May 2003 09:22:51 -0500

Dirk Zimoch wrote:

Hello Andy,
does that mean I have to fix EPICS_TIMEZONE every year?

Yes. This is a problem because of vxWorks.
Our CA clients have been built with R3.13.2 and EPICS_TIMEZONE is not
mentioned in base/config/. Will that environment variable work with our
clients?
Browsing the 3.13.2 code, I could only find TIMEZONE in drvTS.c and that
is vxWorks code. How is the client software affected by this? Aren't
EPICS time stamps time zone independent?

Yes. Epics time stamps use UTC. Thus they are OK.
Thus CA clients are NOT affected since they use epics time stamps.
The only problem is if code on an IOC converts an epics time stamp to an ascii
string. For example the IOC shell date command does this. Thus if TIMEZONE is
wrong date will report a different time than CA clients.

Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System