CONTROL PANEL
ETV 1991
21.06.2018
Page 21
05
Watchdog
The program was interrupted through
the watchdog logic.
Possible Causes:
- Interrupts the user program blocked
of a long time period (STI instruction
forgotten)
- Programming error in a hardware
interrupt.
- INB, OUTB, INW, OUTW instruc-
tions used incorrectly.
- The processor is defect.
Solution:
- Correct programming error.
- Exchange CPU.
06
GENERAL
ERROR
General error
07
PROM DE-
FECT
An error has occurred while program-
ming the memory module.
Cause:
- The program memory module is
defect.
- The user program is too large.
- The program memory module is
missing.
Solution:
- Exchange the program memory
module
08
Reset
The CPU has received the reset signal
and is waiting for further instructions.
The user program is not processed.
09
WD DEFEKT
The hardware monitoring circuit (watch-
dog logic) is defect.
After power-up, the CPU checks the
watchdog logic function. If an error
occurs during this test, the CPU delib-
erately enters an infinite loop from
which no further instructions are ac-
cepted.
Solution: Exchange CPU.
10
STOP
11
PROG BUSYS
12
PROGRAM
LENGTH
13
PROG END
The memory module was successfully
completed.
14
PROG MEMO
The CPU is currently programming the
memory module.
