Hach SC4500 User Manual page 44

• Exception—Unexpected behavior
• Running—Connection is established
As an alternative, examine the LEDs in the PROFINET module.
Figure 12 Module LEDS
1 Network status LED
2 Link/Activity LED
3 Module status LED
Network Module
status status
LED LED
Off Off
Off On
On On
Blinking Blinking
1 flash On
2 flashes On
42 English
Status PROFINET Event EtherNet/IP
Pending Waiting Ethernet
Link
Running PLC connection
or Simulation on
Running Identify node
Idle PLC in STOP
mode
Pending Broken PLC
connection
4 Link/Activity LED
5 Port 2
6 Port 1
event
Waiting Ethernet
Link
PLC connection
or Simulation on
PLC is not in
RUN mode
Broken PLC
connection
Comments
The module has no
power.
No ethernet cable
connected to
module
Ethernet cable
plugged on Port
2 in Mix IEP option.
PLC in RUN mode
without/with
simulation on.
Identify the node
on the Network.