Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Tue, 04 Dec 2007 14:36:16 -0600

Robert Emery wrote:

I have two IOC's running on one linux PC. One is using the default
ports and I changed the other's port using:
EPICS_CA_REPEATER_PORT=5070
EPICS_CA_SERVER_PORT=5071

Do you realize that you don't actually have to do that to run multiple
IOCs on the same workstation (unless that's not why you're seting the
port numbers); almost everything will work properly if you just run them
normally and ignore the warning message from iocInit.
The only time when things might not work is if you have CA clients
connecting to these IOCs from a different subnet and thus that have
their EPICS_CA_ADDR_LIST set to the IP address of the host. In those
circumstances you might just see slow connections, or some channels
might never connect if you're unlucky.
I have been able to get an edm screen to see pv's from both IOC's by
changing the environment variable:
EPICS_CA_ADDR_LIST=nnn.nnn.nnn.nnn nnn.nnn.nnn.nnn:5071
I have not been able to get the two IOC's to see each others PV's. Any
ideas how I would be able to do this?

To answer that, think of each IOC as just another CA client; set its
EPICS_CA_ADDR_LIST to include the other's IP:Port combination and it
should connect properly.
- Andrew
--
When a distinguished but elderly scientist states that something is
possible, he is almost certainly right.  When he states that something
is impossible, he is very probably wrong.  -- Arthur C. Clarke

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System