Correcting An Invalid Topology; Error Message 'Too Many Devices - Siemens FS20 Commissioning, Maintenance, Troubleshooting

Repair
31

Correcting an invalid topology

31.7 Correcting an invalid topology
Stub on ↑ stub or ↑ loop interrupted
Stub on stub on loop
Several stubs starting from same
location on loop
Loop on loop

31.8 Error message 'Too many devices'

170 | 188
Building Technologies
Fire Safety
If the topology of a FDnet detector line is invalid, the error message 'Topology is
invalid' is displayed after the ↑ detector line has been read in. The table below
shows invalid topologies.
Invalid topologies
Troubleshooting
1. Check the detector line with the line tester FDUL221. You will find more
information about this in document 008250. See chapter 'Applicable
documents'.
2. Create a valid topology:
– Rectify the fault by changing over the wiring or plan the detector line again.
– If there are several stub outputs between two FDnet devices, change over
the wiring or add a ↑ line separator FDCL221 between each stub.
3. Read in the FDnet detector line again.
See also
1 Read in devices on detector line [➙ 85]
If the error message 'Too many devices' is displayed after you have removed and
added devices on an active line, run the following command: 'Restart line'.
009052_s_en_--
2016-06-02