Ge-Lunar Model 7861 X-Ray Generator Errors - GE Medical Systems PRODIGY Service Manual

Bit Name
0 /
thermostat_open_sense
1 /external_estop_sense
2 /dc_power_fail
3 /long_motor_fail
4 /trans_motor_fail
5 /dmb_error
6 /motion_fail
7 /watchdog_reset

2.5.7 GE-LUNAR Model 7861 X-ray Generator Errors

Bit Name
0 /hvps_error_0
1 /hvps_error_1
2 /hvps_error_2
3 hvps_enable_status
4 Unused
5 Unused
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PRODIGY Service Manual (Rev C - 2000)
The firmware can also initiate a reset sequence in response to fatal error
conditions by writing a 'death code' to the suicide reset register. Resets can
also be initiated by the manual push button on the cSBC and by a low 5VDC
power condition as sensed by the MAX705 supervisor. The scanner register is
also latched at the end of read cycles such that current status can be
ascertained by a double read. A bit map of the scanner reset register is
provided below
R/ Def. Description
W
R N/A Tube head thermostat over temperature.
R N/A Emergency stop input from external options block.
R N/A Loss of one or more of +5VDC,+12VDC,-12VDC, or +24VDC.
R N/A Motor failure detected on longitudinal axis.
R N/A Motor failure detected on transverse axis.
R N/A DMB dropped it's CTS indicating a DMB reset event.
R N/A OMI pulses detected without step pulse (manual arm motion).
R N/A Watchdog time-out indicates firmware crash.
The HVPS error register is used to monitor the status of the 7681 X-ray
source HVPS. If the register value is not equal to 0xF when /hvps_enable is
low, the FLEX will raise the HVPS_ERROR_INT output to the MAX PLD. The
MAX PLD latches this into the IIR register and issues an interrupt to the CPU.
As such status of the HVPS is monitored when the unit is enabled. The
handler for HVPS interrupt reads this register to determine the cause of the
interrupt. The HVPS register is also latched at the end of read cycles such
that current status can be ascertained by a double read. A bit map of the
register is provided below.
R/ Def. Description
W
R N/A Error code bit from 7681 supply.
R N/A Error code bit from 7681 supply.
R N/A Error code bit from 7681 supply.
R N/A Set when /hvps_enable == /hvps_eanble_status
N/A N/A Expansion room.
N/A N/A Expansion room.
System Overview 2-53