Control Unit Generated A Fault; Control Unit Not Responding; Cs6 Guarto Generated A Fault - Siemens NK8000 Series Installation, Configuration & Operation

9.5.2
9.5.3
9.5.4
Building Technologies
CPS Fire Safety

Control unit generated a fault

If a control unit generated a fault, the problem may be in the connectivity between
one of the control units (or subsystems) and the NK8000.
Check network connections
CerCom/LON (CS6 Guarto only)
⚫
The LON networks are sensitive to improper termination. If it appears, that the
LON communication is not reliable, check the following points:
– Cabling, connectors
– Proper termination
– Physical LON addresses have to be unique in a LON-segment.
– Cable length / quality according to LON FT/TP-10 requirements
RS232
⚫
Diagnostic information about the RS232 state can be obtained from the LEDs
placed on the front panel of NK82xx. Typical problems of RS232
communication are:
– Mix of RXD / TXD lines.
– Line length exceeds the maximum of 15m.
– Disturbances, caused by ground loops.
– Solve problems of exceeding line length by using:
– RS232 line drivers
– Fibre optic converters
– RS422 converters

Control unit not responding

When adding and configuring an NK8000 node, verify that you have the correct
protocol, Local address and Baud rate, and that the data link is up (blinking red and
green). If you have an incorrect protocol, Local address or Baud rate, you will have
no communication in runtime, though no error message will be generated.
Note: The Local address must correspond with the one assigned to the
subsystem during the configuration in the NK8000 Composer tool.

CS6 Guarto generated a fault

When adding and configuring a CS6 node, verify that you have the correct Subnet,
Node, and Logical address. Ensure that Subnet and Node match what is physically
on the rotary switches of the Guarto LON-adapter board K3I070.
Note: For NK822x, the values Subnet = 01, Node = 02, and BACnet Logical
Address = 1 are reserved for the NK822x itself and must not be used for the
Guarto.
Check if the BACnet Logical Address for the management station in the CS6
Guarto configuration is set to 1 (for NK822x) or to the same value set in the
NK823x configuration (to be checked with the CS6 tool SWE6 for Guarto in node
CerCom Bus, properties of node Management Station).
Maintenance and diagnostics
Correcting communication failures
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30.01.2019