Led "Ch2-Level"/"Ch3-Level - Siemens SIMATIC NET Operating Instructions Manual

LED color LED status
Red/yellow Flashing
Red/yellow/off Flashing
Mode "bus without fiber-optic link monitoring"
LED color LED status
- Off
Yellow Lit
2.5.5

LED "CH2-LEVEL"/"CH3-LEVEL"

LED color LED status
Green Lit
Yellow Lit
Red Lit
NOTICE
Mode: LED lit green
If the display of the port level is green in conjunction with a periodically changing color (red
- yellow - off), the relevant port LED, this points to overdrive of this channel. To counteract
this, the transmit power can be reduced, refer to the section "Reducing optical transmit
power (Page 27)".
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06
Meaning
Periodically occurring problem (see above), loose contact
•
in a FO cable connector
FO cable fiber is loose in the FO cable plug
•
There is only one single active bus node connected that
•
is only transmitting tokens to itself. After connecting a
second node, there should no longer be an error display
A periodically changing color (red - yellow - off) at the port
LED in conjunction with a green port level LED indicates
overdrive of this channel. To counteract this, the transmit
power can be reduced, refer to the section "Reducing optical
transmit power (Page 27)".
Meaning
There is no transmitting bus node
•
Send and receive FO cable swapped over
•
No partner module connected or partner module is not
•
turned on
Connected partner module fault
•
PROFIBUS frames are being received on the optical chan-
nel.
Meaning
Receive level adequate, normal operation
Receive level critical, link power margin reduced
Receive level inadequate, function not guaranteed
•
Channel not used, no FO cable connected
•
Description of the device
2.5 LED display
Signaling contact
Signals
Signals
Signaling contact
Does not signal
Does not signal
Signaling contact
Not relevant
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