On-Board® W Module Programming and Operation ... - PTB Sales

Appendix B - On-Board Module RS-232 Interface Protocol Format
CTI-CRYOGENICS
HELIX TECHNOLOGY CORPORATION
Table B-1: On-Board Module RS-232 Commands (Continued)
Command Parameter Description
@ None Returns an identifier string indicating module type and software
revision level.
a None Read back how long it has been since the last REGEN cycle.
The units are in hours.
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.
g None Requests the auto calibration of the pump 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.
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).
k None Returns an internal interval timer value in minutes. When in
the appropriate phase, this value represents the time remaining
in the phase (delay start, cryo restart, purge time). Times from
1 to 60 seconds return as 1 minute. Times from 61 seconds to
120 seconds return as 2 minutes. Zero returns as 0 minutes.
l None Returns the number of failed purge cycles as an integer value.
This value starts at "0" and increments each time a purge phase
fails.
m None Returns the number of failed and extended ROR test cycles as
an integer value. This value starts at "0" and increments each
time a ROR test phase fails.
B-10 P/N 8040365