Siemens FS720 - Correcting an Invalid Topology; Error Message Too Many Devices

Repair
Correcting an invalid topology
24
159 |
178
Building Technologies
A6V10210416_j_en_
--
Fire Safety
2018
-
08
-
29
24.7 Correcting an invalid topology
If the topology of a C-NET 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
Stub on ↑ stub or ↑ loop interrupted
Stub on stub on loop
Several stubs starting from same
location on loop
Loop on loop
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 C-NET devices, change over
the wiring or add a ↑ line separator FDCL221 between each stub.
3. Read in the C-NET detector line again.
See also
2 Read in devices on detector line [➙ 82]
24.8 Error message 'Too many devices'
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'.