LED
Color
OFF
ON
Flashing
CN-RUN
Green
---
Device config-
ured, CANopen
bus in OPERA-
TIONAL state
and cyclic data
exchange run-
ning
Flashing:
CANopen bus in
PRE-OPERA-
TIONAL state
and slave is
being configured
Single flash:
CANopen bus in
STOPPED state.
Flickering: Auto-
detect is active
CN-ERR
Red
No system error
CANopen Bus is
OFF
Flashing: Config-
uration error
Single flash: error
counter overflow
due to too many
error frames
Double flash: A
node-guard or a
heartbeat event
occurred
Flickering: Auto-
detect is active
S-ERR
Red
No error
Internal error
--
I/O bus
Green
No decentralized
I/O modules con-
nected or com-
munication error
Decentralized I/O
modules con-
nected and
operational
---
LED
Color
OFF
ON
Flashing
AI0 to AI3
Yellow
Input is OFF
Input is ON
(brightness
depends on the
value of the
analog signal)
--
AO0 to AO1
Yellow
Output is OFF
Output is ON
(brightness
depends on the
value of the
analog signal)
--
DI0 to DI7
Yellow
Input is OFF
Input is ON (the
input voltage is
even displayed if
the supply
voltage is OFF)
--
DO0 toDO7
Yellow
Output is OFF
Output is ON
--
UP
Green
Process supply
voltage missing
Process supply
voltage OK and
initialization fin-
ished
--
States of the 27
process LEDs:
Device specifications
Communication interface modules (S500) > CANopen
2022/01/31
3ADR010278, 3, en_US
649