[Halld-controls] Connecting Ethernet devices in the Hall D controls system to the PLC

[Elliott Wolin]

Hi,

How many devices do we have that have Ethernet interfaces?

Josh found a 10-channel device that allows the PLC to talk via TCP over 
Ethernet.  It costs around $650 so it's pretty cheap per channel ($65), 
but I only know of one potential use, the Lakeshore temperature 
controller Chris is looking at for the target cryo system.

Connecting RS232 to the PLC via the 435NBX costs around $350/channel, so 
every time we switch from RS232 to Ethernet we save a bundle (using the 
Point I/O RS232 modules costs almost the same per channel as the 
435NBX).  We haven't purchased more 435NBX modules so we have a chance 
to switch to Ethernet now.

What current or future controls devices have or might have Ethernet 
connections?

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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