9600 Service Manual - gmecorp-usa.com

C-Arm Control 27
PIO SECTION
Several digital inputs and outputs are provided for software interface through
PIOs (Parallel Input/Out) U22, U27, and U38. They are connected to the PC bus
shared by the Technique Processor PCB and the Analog Interface PCB. Each
of the PIO chips have 3 eight bit ports; A, B, and C. The ports are configured by
software as either inputs or outputs. These devices monitor status bits and issue
various commands via software control. PIO pin assignments are listed below.
Refer to the C-Arm Software section for typical results for these signals using
the Control Panel Status software.
NOTE: Not all of these signals can be tested using Control Panel Status.
BIT # PIN # SIGNAL FUNCTION COMMENT
PA0-2,
4-7
2-4, 37-40 --------------- not used ---------------
PA3 1 INTEGRATE
(S3)
Integrate function on CCD camera, via
Image Function PCB
LO= CCD sensor not being
scanned
PB0 18 CONTACT Turn on relay K2 for Pre-Charge HI = turn on Q5
PB1 19 Output PRECHRG Turn on relay K1 for Pre-Charge HI = turn on Q4
PB2 20 -
Output
STAT_RUN 40 VAC for Stator Run. After 5 min.
[sleep mode]; this signal goes LO
HI = turn on Q3
PB3 21 --------------- not used ---------------
PB4 22 --------------- not used ---------------
PB5 23 -
Output
STATSTRT 120 VAC (2 sec) for Stator Start HI = turn on Q7 (2 sec)
PB6 24 -
II_ON 24 VDC to Image Intensifier
HI = FLUORO MODE
Output
in FLUORO MODE only
LO = FILM MODE
PB7 25 --------------- not used ---------------
PC0 14 --------------- not used ---------------
PC1 15 - Input SECURITY Verification signal to ensure an
HI = When CPP X-ray or any
X-ray switch has been pressed
footswitch is pressed
PC2 16 --------------- not used ---------------
PC3 17 --------------- not used ---------------
PC4 13 - Input L/R Detects when SAVE Footswitch has
been pressed
PC5 12 - Input FLORONLY Detects when SCOUT FLUORO
Footswitch has been pressed
PC6 11 - Input BOOST Detects when BOOST/DIG. SPOT
footswitch has been pressed
PC7 10 - Input XRAYSW Detects when CPP X-ray Switch or
DIGITAL PROCESS FLUORO footswitch
is pressed
Table 2 - U38 - PIO 1 Pin Assignments
LO = Save Footswitch
Pressed
HI = Scout Fluoro
Footswitch Pressed
HI = Boost/Dig. Spot
Footswitch Pressed
HI = X-ray Switch Pressed