Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Wed, 11 Dec 1996 12:33:40 -0600

Johnny Tang wrote:
> 
> 
> Marty,
> 
> Matt and I are wonder how do you sync your ioc clocks
> after they have been rebooted for a while.
> 
> We found that our two iocs have about one minute difference
> after a week or two. The two iocs were booted at the
> different time.
> 
> We are thinking of writing a vxWorks task to periodicly
> update the IOC local clock.

The syncronous time support already supports what you want.
It offers several options. One is to set up one ioc as
the master. All other iocs ca sync to the master.
Jim Kowalkowski wrote this support. The documentation
is available via the WWW. I dont remember which release
first had this support but certainly by 3.12 it was in place.
Please read the doc for all the available options.
Note that with hardware support you can have completely
synchronized time stamps across iocs.

Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System