Experimental Physics and Industrial Control System
I'm experiencing some strange behavior when using camonitor against an
For some reason a CA_PROTO_EVENT_ADD response from IOC to CA client does
not arrive, or arrives several minutes later after the PV value has
changed. Note that first CA_PROTO_EVENT_ADD response is seen always,
only latter CA_PROTO_EVENT_ADD responses do not arrive (or arrive late)?!
This behavior is not seen always - sometimes the IOC would promptly
respond with CA_PROTO_EVENT_ADD response when needed.
I can see the CA_PROTO_ECHO requests/responses fine on the same
camonitor channel link, only CA_PROTO_EVENT_ADD response is not seen.
Inspecting the IOC I can see that the value did change (on lower levels)
and caput response is also valid - updated with new value.
I've ruled out the network problems, since the issue is raised even when
using cross-over cable to communicate with the IOC. Actually even I
update the value in the IOC shell, the camonitor is not refreshed!!
Has someone experienced something similar?
Are there some conditions that need to fulfilled in order for IOC to
send a subsequent CA_PROTO_EVENT_ADD response(s)?
TIA & HAND,
Technical support software engineer
Velika pot 22, SI-5250 Solkan - Slovenia
T:+386 5 3352600, F:+386 5 3352601
http://www.i-tech.si - When your users demand stability
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