SIGMATEK CCP 621 - Page 31

C-DIAS PROCESSOR MODULE CCP 621
27.03.2020 Page 29
05
WATCHDOG
The program was interrupted via the
watchdog logic.
Possible Causes:
- User program interrupts blocked
over a longer period of time
(STI command 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
DEFECT
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 defective.
After power-up, the CPU checks the
watchdog logic function. If an error
occurs during this test, the CPU deliber-
ately enters an infinite loop from which
no further instructions are accepted.
Solution: Exchange CPU.
10
STOP
11
PROG BUSYS
12
PROGRAM
LENGTH
13
PROG END
A memory module was successfully
programmed.
14
PROG MEMO
The CPU is currently programming the
memory module.