X
X
L
L
D
D
C
C
M
M
A
A
N
N
.
.
d
d
o
o
c
c
3
3
-
-
6
6
7
7
R
R
E
E
V
V
E
E
3-272 SERIAL FUNCTION F72 - FAULT STATUS REQUEST
This function displays the current status of faults in the XL-DC sub-systems. Currently, the status of the
antenna, PLL synthesizer lock status and the GPS lock status are the only such faults being monitored.
The faults indicated here contribute to the state of the summary alarm open collector output and should
be checked via F72 whenever an alarm output is detected.
Send the string F72<CR> and the Serial Port will respond with the following:
F72<SEP>Antenna: <ANT STATUS> PLL: <PLL STATUS> GPS: <GPS STATUS><CR><LF>
where:
F = ASCII character F
72 = function number
<SEP> = one or more separator characters; either space, comma or tab
<ANT STATUS> = OK, OPEN or SHORT
<PLL STATUS> = OK, UNLOCKED
<GPS STATUS> = LOCKED, UNLOCKED
<CR> = ASCII carriage return character
<LF> = ASCII line feed character
3-273 SERIAL FUNCTION F73 - REQUEST/SET ALARM STATUS/CONTROL
This function allows the user to control which conditions will signal an alarm or fault through the 87-6XX
GPS-XL open collector output or through relay contacts on the 86-336 or 86-379 option boards. The
user may also monitor the status of the individual indicators which may contribute to the summary
alarm output. In addition, the user may monitor the status of a latched version of the individual fault
indicators which will show whether transient faults are occurring.
The fault status flags can be read by the following command, regardless of whether the faults are
enabled or not:
F73<CR>
which returns: F73<SP>S12345678<SP>M12345678<SP>m12345678<CR><LF>
where:
F = ASCII character F
7 = ASCII character 7
3 = ASCII character 3
<SP> = ASCII space character
S = 'S' Status delimiter
1 = 'L' Satellite Lock OK
'U' Unlock Spec Reached
2 = 'A' Position Accurate, Full Accuracy and Stability When
Locked
'B' Position Approximate, Slightly Degraded Accuracy and
Stability When Locked
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