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

Description of the device
2.5 LED display
2.5.4

LED "CH2"/"CH3" - optical

Mode "bus with fiber-optic link monitoring and "redundant optical ring"
LED color LED status
- Off
Yellow Lit
Yellow Flashing
Red Lit
16
Meaning
Transmission rate not yet detected - "System" LED flashes
red
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
•
Transmission rate has been detected - "System" LED lit
green
If the "redundant optical ring" mode is set, the optical
•
channel operates as a standby channel. There is no prob-
lem in the OLM or on the fiber-optic cable.
If one of the modes "bus with fiber-optic link monitoring
•
..." is set, no PROFIBUS frames are received on the opti-
cal channel. There is no problem in the OLM or on the fi-
ber-optic cable.
PROFIBUS frames are being received on the optical chan-
nel.
Transmission rate has been detected - "System" LED lit
green or flashes red/green
There is no transmitting bus node (fiber-optic cable link is
•
okay)
Send and receive FO cable swapped over
•
No partner module connected or partner module is not
•
turned on
Connected partner module fault
•
Transmission time exceeded by the connected partner
•
module
Interrupted FO cable
•
FO cable section to partner module longer than allowed
•
Fiber-optic cable connector has a loose contact
•
FO cable fiber is loose in the FO cable plug
•
If the channel LED of the two OLMs involved continues to
•
be lit red even after eliminating a FO cable problem in the
redundant optical ring, check that the setting of the HSA
parameter as described in the section "Ring topology
(Page 59)" is correct
Operating Instructions, 01/2020, C79000-G8976-C270-06
Signaling contact
Does not signal
Does not signal
Does not signal
Signals
Optical link module