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G1 Introduction to AC500 1-53 AC500 / Issued: 07.2006
The meanings of the LEDs and the LCD display are listed in the following table:
AC500 CPU module LEDs
LED Status Color LED = ON LED = OFF LED flashes
PWR 24 V DC
power supply
is provided
green voltage is present voltage is
missing
--
RUN activity status green CPU is in RUN
mode
CPU is in
STOP mode
If flashes fast (4 Hz):
The CPU is
reading/writing the SD
card, indicates together
with the blinking error
LED that the CPU is
writing the internal Flash
EEPROM.
If flashes slow (1 Hz):
The firmware update
from the SD card is
finished without errors.
ERR error indication red An error has
occurred. The
error type and
code is displayed
in the LC Display.
The error codes
can be shown by
means of the
DIAG and OK
keys.
No errors are
encountered or
only warnings
(E4 errors).
This is
configurable
(by error 2 - 4,
the LED
behaviour is
configurable.
Flashing fast (4 Hz):
Indicates together with
RUN a firmware update
process and a Flash
EEPROM write.
Working
activity of the
beneath
described
device (e.g.
top right of the
display ETH
communication
line).
black Device is present
and OK (e.g. the
battery is present
and OK).
No activity or
device not
present
Flashing according to
the device activity, e.g.
when data exchange on
ETH, COM1, etc...
communication lines.
or Indicates the
selected
device to be
read or
configured.
Acts as a
cursor moving
with the arrow
keys
black Points out the
selected device
of which the
name is written
beneath (e.g. top
right of the
display ETH
communication
line).
No device
selected
--
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