Experimental Physics and
Industrial Control System

Do you write to one of those records that take a long time to complete a
ca_put_callback? Many SynApps records behave like that. For example the motor
record does not become "ready" until motion has finished.

From studying the debugging logs, it looks like some channels

continuously report:
"write() pv not ready" when a client tries to write to them through the
gateway.
Then (usually triggered by a caget from a terminal) they become ready
"vcAdd() connecting -> ready"
After which a large backlog of writes are allowed through.

In some cases, I looks like a write to an input field is put on hold as
the channel isn't "ready" and then when a write to the Directive field
goes through, the input field becomes ready and the input is written
after the directive ... causing the "out of order", and thus failed,
commands.

What handshake between the ioc and the gateway is failing to set some
channels ready while others work properly?

Some help here would be greatly appreciated.
Angelic

--
Dr. Dirk Zimoch
Paul Scherrer Institut, WBGB/006
5232 Villigen PSI, Switzerland
Phone +41 56 310 5182

References:

Gateway problem .... more info Angelic Ebbers

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