[Halld-controls] Latest on detector temperature measurements

[Elliott Wolin]

Hi,

The latest I know about concerning temperature measurements is as follows:

- CDC  - 10 (?) thermocouple channels , I forget which type they settled 
on (Naomi)
- BCAL - 96 RTD channels (Elton, Jim will present more information at a 
Controls meeting)
- Start counter - 4-30 Type-T thermocouple channels (Fernando)

My understanding in all cases is that these are for monitoring/alarming 
only, no feedback to any control systems.

Fernando is not sure whether they need to read out a few representative 
start counter thermocouple channels or whether they need readouts from 
all 30 boards.  Note that all these channels come out upstream.  We 
should plan for either case.

One possibility is to run all these channels to a single box on top of 
the magnet, perhaps a stand-alone CompactLogix system (n.b. SNS 
confirmed the EPICS driver works with both ControlLogix and CompactLogix 
PLC's).  Or we could have a hybrid system containing CompactLogix, 
ControlLogix, Point I/O and/or Flex I/O systems.  Or...?

Thanks,

-- 

				Sincerely,
					Elliott


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  Those raised in a morally relative or neutral environment will hold
		    no truths to be self-evident.
				

Elliott Wolin
Staff Physicist, Jefferson Lab
12000 Jefferson Ave
Suite 8 MS 12A1
Newport News, VA 23606
757-269-7365

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