36
Step 7: Checking the PROFINET fieldbus connection
After the re-start the controller should establish a PROFINET connection between
the controller and the device. To check the correct function have a look at the LEDs
on top of the bus system. After a few seconds you should see the following LEDs:
*
LED P2 L/A is only active if the outbound fieldbus cable is connected.
Picture 27 (PROFINET Status)
In addition you can see some status messages in the TwinCAT System Manager.
To do so, select the PROFINET Controller and click on
Device 1 - Process Im-
ages
. On the right side of the screen
you’ll see an overview over the status varia-
bles (select the register
Common
).
LED Designation
Color
State
24V_1
green
on
24V_2
green
on
24V_3
green
on or off
P1 L/A
green
on or flickering
P2 L/A
green
on or flickering *
MD OK
green
on
MD ERR
red
off
FB OK
green
on
FB ERR
red
off
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