Experimental Physics and
Industrial Control System

"Schoeneburg, Bernd" <[email protected]> · Fri, 20 Feb 2009 17:06:35 +0100

Ralph Lange schrieb:

. . .

For the Redundant IOC , it has the interesting side effect that you

can select if the record should be processed at boot time, or after

the IOC has become active.

(If the IOC switches back and forth between active and inactive, would

UP records be processed whenever it gets active? Do we need to

distinguish between "Once UP" and "Whenever UP"?)

. . .

This is really a good idea.

We have an additional requirement: The record code of some records need

to know if it is processed normally, the first time at all or the first

time after the ioc became active. Up to now we solved this problem by

introducing a new field in those records and a function, which sets

these fields, is registered to the redundancy task (RMT). These records

are in a linked list. When the ioc becomes active the RMT sets the

fields to a value, so that the record code can see that the record is

processed first after becoming active.

A more general solution for this problem would be welcome.

- Bernd