ABB AC500 PLC - 1.7.1.3.9 State LEDs

4
)
This message appears if external voltages at one or more terminals DC0..DC7
or DO0..DO7 cause other digital outputs to be supplied by that voltage (voltage
feedback, see Electrical Connection Ä Chapter 1.7.1.3.3 “Electrical Connec-
tion” on page 740). All outputs of the digital output groups will be turned off for
5 seconds. The diagnosis message appears for the whole output group.
5
)
The voltage at digital outputs DC0..DC7 and DO0..DO7 has exceeded the
process supply voltage UP3 (see Electrical Connection Ä Chapter 1.7.1.3.3
“Electrical Connection” on page 740). A diagnosis message appears for the
whole module.
6
)
This message appears if the output of a channel DC0..DC7 or DO0..DO7
should be switched on while an external voltage is connected. In this case the
start-up is disabled while the external voltage is connected. Otherwise, this
could produce reverse voltage flowing from this output to other digital outputs.
This diagnosis message appears for each channel.
7
)
Short circuit: After a short circuit has been detected, the output is deactivated
for 100ms. Subsequently, a new start-up will be executed. This diagnosis mes-
sage appears for each channel.
1.7.1.3.9 State LEDs
The LEDs are located at the front of the module. There are 2 different groups:
● The 5 system LEDs (PWR, CN-RUN, CN-ERR, S-ERR and I/O bus) show the operation
states of the module and display possible errors.
● The 29 process LEDs (UP, UP3, inputs, outputs, CH-ERR1 to CH-ERR3) show the process
supply voltage and the states of the inputs and outputs and display possible errors.
LED Color OFF ON Flashing
PWR/RUN Green Process supply
voltage missing
Internal supply
voltage OK,
module ready for
communication
with I/O controller
Start-up / pre-
paring communi-
cation
Yellow --- --- ---
CN-RUN Green --- Device config-
ured, CANopen
bus in OPERA-
TIONAL state
and cyclic data
exchange run-
ning
Flashing: CAN-
open bus in PRE-
OPERATIONAL
state and slave is
being configured
Single flash:
CANopen bus in
STOPPED state.
Flickering: Auto-
detect is active
States of the 5
System LEDs
Device Specifications
Communication Interface Modules (S500) > CANopen
2019/04/173ADR010121, 13, en_US754