GE Medical Systems PRODIGY Service Manual page 42

PORT B
Bit Name
0 /trans_front_lsw
1 /trans_back_lsw
2 /long_foot_lsw
3 /long_head_lsw
4 trans_count_eq[0]
5 long_count_eq[0]
6 /shutter_open_sense
7 /collimator_open_sense
PORT C
Bit Name
0
/long_rev_pos
1
/long_fwd_pos
2
/trans_rev_pos
3
/trans_fwd_pos
4
/hvps_ac_relay
5
/motor_fail_enable
6
ags_enable
7
/motor_power
This document contains confidential or proprietary information of GE-Lunar Corp. Neither the document nor the information therein is
to be reproduced, distributed, used or disclosed, either in whole or in part, except as specifically authorized by GE-Lunar Corp.
2-48 System Overview
R/ Def. Description
W
R N/A Transverse front limit switch position.
R N/A Transverse back limit switch position.
R N/A Longitudinal foot limit switch position.
R N/A Longitudinal head limit switch position.
R N/A Set when transverse step counter equals zero.
R N/A Set when longitudinal step counter equals zero.
R N/A Shutter limit switch position.
R N/A Collimator limit switch position.
R/ Def. Description
W
R N/A Patient positioner (joystick) input.
R N/A Patient positioner (joystick) input.
R N/A Patient positioner (joystick) input.
R N/A Patient positioner (joystick) input.
R/W 1 Enable AC power to X-ray HVPS.
R/W 1 Arm logic to shutdown scanner if OMI inputs not sensed.
R/W 0 Enable detector automatic gain control feedback circuit.
R/W 1 Enable 24VDC to the stepper motor drives (a.k.a. Centents).
PRODIGY Service Manual (Rev C - 2000)