Siemens SIMATIC BusAdapter - Page 60

BusAdapter BA SCRJ/FC
10.3 Diagnostics
BusAdapter
Equipment Manual, 08/2020, A5E41449003-AB
59
LK1/LK2 and MT LEDs on the BusAdapter
Table 10- 2 Status and error displays
LED
Meaning Remedy
LK1/LK2
MT
off
Not relevant
There is no Ethernet connec-
tion between the PROFINET IO
interface of your PROFINET
device and a communication
partner, e.g. IO controller.
Check whether the bus cable to the
switch or IO controller is disconnect-
ed.
on
Not relevant
There is an Ethernet connec-
tion between the PROFINET IO
interface of your PROFINET
device and a communication
partner, e.g. IO controller.
-
flashes
Not relevant
The "Node flash test" is run-
ning. The RN/ER/MT LEDs are
also flashing.
-
Not relevant
off
No error
-
Not relevant
on
• Fiber-optic error
• Maintenance demanded:
attenuation through the fi-
ber-optic cable is already
so high that operation will
soon no longer be possible.
Causes and measures for the trans-
mission route:
• Replace the fiber-optic cable if
damaged or aged.
• Ensure correct installation of the
PROFINET plugs or PROFINET
connectors.
• Adhere to maximum length of
50 m for POF cable or 100 m for
PCF cable.
• Ensure that the FOC connectors
fit securely.