Re: Use of the sequencer for run permit calculations

[Ron Chestnut <rpc@SLAC.Stanford.EDU>]

Dear Peregrine,

The sequences in EPICS are my favorite hammer. I have implemented several 
complicated ones here at SLAC to control PEP-II injection. The detector, BABAR, 
is making progress now and we'll soon be implementing the injection permissive 
stuff, where we check-in with BABAR and await permission before beginning 
injection.

In addition, our RF systems in PEP-II use sequences to process the stations at 
turn-on, which is a kind of interlocked run permit situation.

If timing is very important, you can fetch the time stamps of when a record was 
last processed to ensure fresh data.

/Ron Chestnut
SLAC (650) 926-2450