Appendix B - On-Board Module RS-232 Interface Protocol Format
B-12
P/N 8040406
C
HELIX TECHNOLOGY CORPORATION
-
TI
CRYOGENICS
e
None
Read error code result of REGEN operation. Returns one of
eight characters as defined in Appendix C, should only be used
when REGEN response V is returned.
@ - No errorA,
B - WARMUP TIMEOUT. Did not reach warmup temperature
within 60 minutes.
C - COOLDOWN TIMEOUT. Did not cool down within 5
hours.
D - Error in rate of roughing (2% per minute).
E - ROR CYCLE LIMIT WAS REACHED. The pump did not
pass the rate-of-rise test within the programmed cycle limit.
F - MANUAL ABORT. Someone manually gave the command
to stop regeneration.
G - ROUGH VALVE TIMEOUT. Rough valve was opened for
more than 1 hour without closing.
H - Caused by illegal state
encountered, system bug.
I - Start of Fast regeneration not
allowed; pump too warm.
J - TOO COLD TO ROUGH. Pump was too cold to rough to
maintain base pressure.
g
None
Requests the auto calibration of the CRYO TC gauge. Returns
a "G" or "H" error code if conditions are not valid to perform
the auto zero calibrate, such as TC not turned ON or the pres-
sure is too high.
h
None
Requests the auto calibration of the AUX TC gauge. Returns a
"G" or "H" error code if conditions are not valid to perform the
auto zero calibrate, such as TC not turned ON or the pressure is
too high.
i
[0,1,2,?]
Set/Clear/Query the power fail recovery flag.
0 - Power Fail Recovery turned OFF
1 - Power Fail Recovery turned ON
2 - Power Fail Recovery if below power failure temperature
limit
? - Provides Power Fail Recovery status
j
[0..59994, ?]
Pump delay to start of regeneration cycle (minutes).
Table B-1: On-Board Module RS-232 Commands (Continued)
Command
Parameter
Description