A Diagnostics And Error Messages A; Status Word (Byte 0, Byte 1) A; Led Displays - Siemens SIMATIC S5 Manual

Standard Function Counter
A Diagnostics and Error Messages
The actual operating state can be diagnosed and the error messages can be monitored over the
status word.
A.1 Status Word (Byte 0, Byte 1)
Byte 0
Byte 1
Bit 7
The group error bit is set in the case of every error.
A.2

LED Displays

Operating states and fault states can be detected via the STOP and RUN LEDs as well as by using
the diagnostics possibilities of the status word:
STOP LED
Constant light
Flashing light
Flashing light
--
Rapid flashing
EWA 4NEB 812 6131-02
Bit 0
RUN LED
--
--
Constant light
Constant light
--
Diagnostics and Error Messages
Status flag
Bit 1 Bit 0
0 1
1 0
1: IP 265 loaded
1: Module fault
1: I/O not ready (short-circuit, break in ground
connection)
1: Group error
Status
STOP Desired STOP
STOP Group error (for every error)
RUN Short-circuit at the output
RUN Status
STOP Load from the submodule
IP 265
STOP
RUN
Diagnosis
A-1