
LED
State
Color
LED = ON
LED = OFF
LED flashing
PWR
Power supply Green
Power supply
present
Power supply
missing
--
RUN
RUN/STOP
state
Green
Processor
module is in
state RUN
Processor
module is in
state STOP
Fast flashing
(4 Hz): The
processor
module is
reading/
writing data
from/to the
memory card.
If the ERR-
LED is also
flashing, data
is being
written to the
Flash-
EEPROM.
Slow flashing
(1 Hz): The
firmware
update from
the memory
card has been
completed
successfully.
ERR
Error indica-
tion
Red
An error
occurred
No errors or
only warnings
encountered
(E4-errors).
The LED
behavior for
the error
classes 2 to 4
is configu-
rable.
With 4 Hz
(fast): dis-
plays together
with the RUN
LED a cur-
rently running
a firmware-
upgrade or
writing data to
the Flash-
EPROM.
Each processor module contains up to 15 LEDs (depending on type) to display the states of the
inputs and outputs.
Processor
module
LED
State
Color
LED = ON
LED = OFF
PM55x-xP
PM56x-xP
I0...I7
(PM55x-xP)
I0...I5
(PM56x-xP)
Digital input
Yellow
Input is ON
Input is OFF
O0...O5
Digital output
Yellow
Output is ON
Output is OFF
PM56x-xP
AI0, AI1 *)
Analog input
Yellow
Input is ON
Input is OFF
AO
Analog output Yellow
Output is ON
Output is OFF
*) The analog inputs AI0 and AI1 can be configured as digital input or analog input.
I/O LEDs
Device Specifications
Processor Modules > AC500-eCo
2019/04/17
3ADR010121, 13, en_US
31