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STOP Mode
LED displays
STOP LED lit continuously
STOP LED flashes slowly
(approx. once every 2 sec)
4 - 12
The SOFT STOP status can be recognized by the LEDs on the front
panel of the CPU as follows:
LED
RUN
STOP
SYSFAULT
BASP
on (except in test mode with multiprocessor mode
The STOP LED signals the possible causes of the current stop status,
as follows:
The SOFT STOP mode was triggered by the following:
in single processor operation:
-
by changing the mode selector
from RUN to STOP,
-
by the PG function PLC STOP,
-
by a device fault (PEU),
-
following an OVERALL RESET.
in multiprocessor operation:
-
by changing the mode selector on the COR to STOP,
-
a different CPU has changed to the STOP mode due to a problem
(each CPU not causing the error has a constantly lit LED) or by the
STOP switch,
-
PG function PLC STOP
-
PG function "program test end" on a different CPU
The SOFT STOP was triggered by the following:
-
STP or STS statement in the user program,
-
operator error (DB 1/DX 0 error, selection of an illegal start-up
mode etc.),
-
BSTACK overflow (STUEB) or bracket counter overflow (KZU),
-
programming errors or device faults; the following LEDs provide
further information:
- "ADF" LED
- "QVZ" LED
- "ZYK" LED
-
by the PG function "program test end" on this CPU.
Status
off
on (continuous or flashing light)
off
or with PG function "force outputs")
CPU 948 Programming Guide
C79000-G8576-C848-04
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