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Figure 6-2. Computer Discrete Loop Closer Functional Block Diagram | Up
TM-5-6675-238-14 Theodolite: Directional: 0.002-MIL Graduation: 5.9 In. Long Telescope Detachable Tribrach: w/Accessories and Tripod Manual | Next
Table 6-3. Input/Output Discrete Signals - Continued |
ARMY TM 5-6675-238-14
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Table 6-3. Input/Output Discrete Signals
Bit in
i n p ut
Output
Output discrete
discrete
Input discrete
group no.
signal name
word
signal name
Notes
1
IMU flag set
CDU flag set
IMU flag reset
CDU flag reset
X and Y gyro
fast slew
Z gyro fast slew
Spare
Spare
2
Spare
Spare
Power on reset
Charge
Battery (to CDU)
Computer fail
Spare
Spare
3
4
5
6
7
11
8
None
3
4
5
6
7
11
8
None
IMU ready
Accelerometer
coarse
heater on
Gyro coarse
heater on
Gyro float to
temperature
Spare no. 1
Spare no. 3
Spare no. 2
IMU fail
(from IMU)
IMU ready
Accelerometer
coarse
heater on
Gyro coarse
heater on
Gyro float to
temperature
Spare no. 1
Spare no. 3
Spare no. 2
IMU fail
(from IMU)
Each output discrete signal in this group
(except spares) is directly under com-
puter control (i.e., it is represented as a
bit in the output discrete word); hence,
this group of output signals is used to
test the input discrete lines in both the 1
and 0 states
The power on reset signal is a pulse and
must be stored in a latch in the SPU
6-7
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