User's Manual

SECTION III OPERATION
SM 7063 07/97 3-31
Defined ASCII Messages:
In addition to the above characters, specific ASCII messages are transmitted by the Data Logger Port
as follows:
1. If the CDU has a valid ID number but has not been armed to this ID, the message
“ NOT ARMD “
is output to the Datalogger Port. Until such time as the CDU is armed to the End Unit with this ID,
all subsequent outputs will carry the “U” in character position 4.
2. If the CDU has declared a Rear-to-Front Communications Failure, the following message
is output to the Datalogger Port:
“ R>F FAIL “
3. If the CDU has declared a Front-to-Rear Communications Failure, the following message
is output to the Datalogger Port:
“ F>R FAIL “
4. If the End Unit powers down as a result of the brakepipe pressure dropping to < 5 psig, the following
message is output to the Datalogger Port:
“ NO AIR # “
5. If the CDU is in the ID Scan Mode where it is displaying all incoming IDs, all readable IDs are output
to the data logger port in the following format:
“ ID=12345 “
6. If an ARM NOW message is received from the End Unit, the following message is output to the
Datalogger Port:
“ ARM NOW# “
7. If the Arming process has failed, the following message is output to the Datalogger Port:
“ ARM FAIL “
8. If the Arming process was successful, the following message is output to the Datalogger Port:
“ ARMED “
9. On CDU power-up, the following messages are output to the Datalogger Port:
“ US&S6696“
followed by
“POWERUP”
10. If a failure occurs during the CDU power-up self-test sequence, the following messages are output
to the Datalogger Port:
“ SELFTEST“
followed by
“FAIL ”