HELIX CTI-CRYOGENICS On-Board FastRegen Programming And Operation Instructions page 96

Appendix B - On-Board Module RS-232 Interface Protocol Format
Table B-1: On-Board Module RS-232 Commands (Continued)
Command
T
[4 digit number]
| {[?] [0,1,2,8]}
B-10
Parameter
[1-2] This command programs the setpoint relays. The first parame-
{[0-8,ABCF]
ter tells the relay number (1 or 2). The second parameter is one
of two forms. The first, used for setting the item to be pro-
grammed, consists of a selector (0-8, ABCF). This form is fol-
lowed by a third parameter, a 4 four digit number, if the selector
is 0 - 8. The A - F selectors do not require a following numeric
parameter, as they are logical function settings.
The second form is used to query the settings and consists of
the "?" command element followed by a selector (0-2, 8) to
indicate what data is being queried.
Selector meaning for first form:
0 = Set first stage LL (deg Kelvin)
1 = Set first stage UL
2 = Set second stage LL (deg Kelvin)
3 = Set second stage UL
4 = Set Pump TC LL (microns)
5 = Set Pump TC UL
6 = Set AUX TC LL (microns)
7 = Set AUX TC UL
8 = Set time relay (0-9999 seconds)
A = Set unconditional ON
B = Set unconditional OFF
C = Set as REGEN status tracking relay
D = Set as rough valve tracking relay
F = Set as pump motor ON/OFF status tracking relay
Selector meaning for second form:
0:=Query previously set LL
1:=Query previously set UL
2:=Query last sent first form selector (0-7, A,B) used to
establish particular relay function
8:=Query relay time delay (0-9999 seconds)
Examples:
"$T 1 2 25" /* Set relay 1 second stage LL to 25K
"$T 1 8 30" /* Set relay 1 time delay to 30 seconds
"$T 1 ? 0" /* Query relay 1 last LL value
"$T 1 ? 2" /* Query mode of relay startup for relay 1, returns
Description
(meaning depends upon previous use)
(meaning depends upon previous use)
0 - 7 A - F as characters
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