Re: Multiple Queries(on Sequencer and IOC)

[Ralph Lange <Ralph.Lange@gmx.de>]

Hello Ganesh,

On 19.03.2014 10:30, Ganesh Jangir wrote:

2. How to check a particular PV is connected, in sequencer?

Use pvConnected [1].

3.  How to run multiple ioc(it may be soft or hard, having sequencer program ) on a single linux machine(Fedora 19).
I am getting warning when running multiple IOC machine. similar to ...

cas warning : configure TCP port was unavailable
cas warning : using dynamically assigned TCP port 56892
cas warning : but now two or more severs share the same UDP port
cas warning : Depending on your IP kernel this server may not be
cas warning : reachable with UDP unicast (a host's IP in EPICS_CA_ADDR_LIST)

I found some mail trail online but could  not get straight way. I also tried with putting firewall off.

These are the warnings that you get when you run multiple IOCs on one machine.
They are warnings (and not errors), and the only way to avoid them would be running only one IOC on a machine.

(Details are in the CA Reference Manual [2].)

4. How to monitor a passive record even it has same value after update.(as camonitor do not show/reflected same value update in pv ).

This depends on the record type. For analog records, set MDEL to -1 to get a monitor update for each processing.
(This is described in the Record Reference Manual [3].)

Please read the documentation that is available at the EPICS web site. [4]
Attending a training can also get you up to speed quickly. (Usually two-day trainings are held at the EPICS Collaboration Meetings. [5])

Cheers,
~Ralph

[1] http://www-csr.bessy.de/control/SoftDist/sequencer/Reference.html#pvconnected
[2] http://www.aps.anl.gov/epics/base/R3-14/12-docs/CAref.html#Unicast
[3] https://wiki-ext.aps.anl.gov/epics/index.php/RRM_3-14_Concepts#Monitor_Specification
[4] http://www.aps.anl.gov/epics/
[5] http://www.aps.anl.gov/epics/meetings.php