2024年5月4日发(作者：)

5.7 LED Displays and Troubleshooting

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