ABB AC500 - Status Display and Error Indication on the AC500 CPU

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G1 Introduction to AC500 1-52 AC500 / Issued: 07.2006
Status display and error indication on the AC500 CPU
All AC500 CPUs have LEDs and a LC Display for indicating operating statuses and errors. The following
drawing shows the front face of a AC500 CPU.
ETH
FBP
COM1
COM2
PWR RUN ERR
RUN DIAG
VAL CFG
ESC
OK
PM581
INSERT
PUSH
MC
502
SYS
BATT
I/O-Bus
CPU
24 V DC 10 W
WARNING!
Use of
incorrect
battery may
cause fire or
explosion.
The CPU statuses are displayed on the CPU front
face with 3 LEDs:
–PWR
–RUN
–ERR
– and by means of a background-lighted display
The display contains the following indications:
– small black squares indications acting as a
LED status for the device written beneath
– small black arrows used for indication by
pointing the selected device to be con-
figured or read
– 6 x 7-segment displays for “plain text” or
error codes display
Figure: Front face of a AC500 CPU
The display’s background lighting is normally switched off. The status of the CPU is shown as plain text
"run" or "Stop", which reflects the operating status of the CPU program.
By pressing one of the dialog keys "RUN, DIAG, CFG or VAL", the background lighting is turned ON
and the desired function is performed.
In case of a function error, the display background lighting is also switched on and an error code is
displayed.