olm指示灯ch2闪烁_olm灯状态全文
System
lit green
The transmission rate was detected and the voltage supply is ok
does not signal
not lit
Voltage supply outage (complete outage, with a redundant
signals
supply, outage down of both supply voltages)
- Voltage supply connected wrongly
- Module defective
flashes red
Transmission rate not yet detected
does not
signal
- There is no transmitting bus node
- No connection to a partner module sending frames
- Transmit and receive fiber-optic cables are swapped over
- Transmission rate does not correspond to the PROFIBUS standard
- Only one single bus node is connected, which only sends token to itself. After
activation of a second bus node, the display must change (token frames are not
enough to set the transmission rate) - The connected RS-485 segment is only
terminated at one side
flashes red/green
Transmission rate detected but
does not signal
- The slot time of the network could not be dete
does not signal
cted yet (network parameter HSA set too low, there is no transmitting bus node)
-
One optical channel is set to “redundant optical ring“ mode but the second one is not
(this mode must always be set on both optical channels)
- The value for the slot time of the network is set too low
CH1, CH0
lit yellow
Signals are received on the RS-485 bus lines.
does not signal
Electrical
not lit
Bus node is not connected, does not signal
-Connected bus node is not turned on
does not signal
- Interruption
4
of one or both cores of the RS-485 bus line
- Short circuit
1
or ground fault of cores of the RS-485 bus line
flashes red/lit red
Sporadic disturbances because of
signals
- Insufficient shielding of the RS-485 bus cable
does not signal
- Open bus cable, this means the RS-485 bus cable is only connected at one end
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