Trans / Long Motor Control And Status - GE Medical Systems PRODIGY Service Manual

PORT F
Bit Name
0
/motion_fail_enable
1
long_motor_fail_axis
2
/hvps_enable
3
flex_diag_2
4
/arm_estop_sense
5
spare_jmp_[1]
6
spare_jmp_[0]
7
cpu_p1_2
PORT G
Bit Name
0
adc_mux_[0]
1
adc_mux_[1]
2
adc_mux_[2]
3
adc_mux_[3]
4
adc_mux_enable
5
8ms_clock
6
unused
7
unused

2.5.3 TRANS / LONG MOTOR Control and Status

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2-50 System Overview
R/ Def.
W
R/W 1
R/W 0
R/W 1
R/W 0
R N/A
R N/A
R N/A
R N/A
R/ Def.
W
R/W 0
R/W 0
R/W 0
R/W 0
R/W 0
R/W 0
N/A N/A
N/A N/A
Dual axis stepper motor control is provided entirely by the FLEX PLD. To
make a typical move the firmware loads a starting velocity into the 16 bit
VELOCITY register, the total number of steps for the move into the 16 bit
TARGET register, and step at which to next interrupt the CPU into the 16 bit
STEP register. Velocity is in terms of periods of the 2.0MHz fundamental clock
per micro step pulse to the stepper drive. The drives provide 10 micro steps
per full step. The firmware can track move status by reading the 16 bit READ
register.
Description
Arm scanner shutdown if OMI pulses w/o step pulses.
Motor fail circuitry axis control, clear for transverse.
Enable output to 7681 supply.
Firmware controlled diagnostic LED.
Emergency stop sense bit.
Unused input, resistor or jumper selectable on CCA.
Unused input, resistor or jumper selectable on CCA.
Firmware controlled diagnostic LED.
Description
ADC analog MUX input selection control bit.
ADC analog MUX input selection control bit.
ADC analog MUX input selection control bit.
ADC analog MUX input selection control bit.
ADC MUX output enable control.
Clock output provided to MAX PLD.
For expansion.
For expansion.
PRODIGY Service Manual (Rev C - 2000)