Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Thu, 23 Feb 2012 18:25:51 +0100

On 23.02.2012 17:10, Chris Slominski wrote:
> I was thinking of a local solution for one process on one host, but I
> will consider your global solution. I'm not sure I want every client
> restarting their searches for disconnected channels.
>
>   Thanks.

Start the wake-up IOC (using e.g. "echo iocInit | softIoc") on the same
host as your client, with EPICS_CA_ADDR_LIST=127.0.0.1 and
EPICS_CA_AUTO_ADDR_LIST=NO, and you have a one-host solution.

~Ralph

> Ralph Lange wrote:
>> Chris,
>>
>> You need a beacon anomaly that your clients can see, so they rebroadcast
>> their unresolved names.
>>
>> Quick-and-dirty solution:
>> The easiest way to create a beacon anomaly is to start up an IOC. Create
>> an empty soft IOC on a machine on the clients' network (the softIoc
>> executable from base is fine). Set up a cron job that starts the IOC,
>> waits a second, then kills it.
>> Whenever that cron job runs, all clients on the local network will try
>> to resolve their channels.
>>
>> ~Ralph
>>
>>
>> On 23.02.2012 14:18, Chris Slominski wrote:
>>  
>>> I want to be able to force my EPICS channel access client to begin a
>>> new search for currently disconnected channels.We have small short
>>> term pc104 iocs come and go and sometimes they are  not configured
>>> correctly to broadcast when they have been booted up. A client
>>> listening to the channels won't see a beacon anomaly and  begin the
>>> channel search sequence.
>>>
>>> I can see a couple of ways to do this.
>>>
>>> - Send a network beacon to the CA Repeater.
>>> - Issue a search for some non-existent channel.
>>>
>>> Please advise on what is a good way to do this. Example code or
>>> references to EPICS source code are very welcome, as I am neither
>>> familiar with EPICS base software, nor am I an experienced network
>>> programmer. My client software uses EPICS 3.13.10.
>>>
>>>       Chris
>>>     
>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System