Technical data

CHALLENGE/Onyx Diagnostic Road Map 4-9
COP FAILURE The Computer Operating Properly (COP) timer has
exceeded time limits. The System Controller firmware
must write to a COP timer port before it times out. If the
firmware exceeds the time allowed between writes to a
COP port, an interrupt is generated. The System
Controller firmware may have entered an endless loop.
COP MONITOR FAILURE A Computer Operating Properly (COP) clock monitor
failure was detected. The System Controller clock
oscillator is operating at less than 10 kHz.
FP CONTROLLER FAULT An error was detected in the front panel LCD display
control process.
ILLEGAL OPCODE TRAP The System Controller’s microprocessor tried to execute
an illegal instruction, probably because of a stack
overrun followed by a process switch.
MEMORY FAILURE The System Controller’s internal memory experienced a
failure.
PULSE ACCU INPUT An interrupt was detected on the pulse accumulator
input port. The port is not used and an interrupt is
considered an error.
PULSE ACCU OVERFLOW The pulse accumulator overflow port received an
interrupt. This port is unused and the interrupt is
considered an error.
SOFTWARE INTERRUPT A software generated interrupt was detected. This
function is not supported and the interrupt is considered
an error.
SPI TRANSFER An interrupt was detected on the synchronous serial
peripheral interface. This interface is not supported and
the interrupt is an error.
STACK FAULT PID 0–6 One of the seven stack areas used by a System Controller
process has overflowed its assigned boundaries
TIMER IN COMP 1 The timer input compare port received an interrupt. The
port is not used and the interrupt is considered an error.
TIMER IN COMP 2
TIMER IN COMP 3
TIMER OUT COMP 1–5 One of the five timer output compare ports received an
interrupt. The port is not supported and the interrupt is
considered an error.
TIMER OVERFLOW A timer overflow port interrupt occurred. This port is not
used and the interrupt is considered an error.
SCI SERIAL COMM
REAL TIME INTERRUPT
Error Message Error Meaning
Table 4-5 System Controller Internal Problems