User Guide

Honeywell • 34 FAULT TRACING
Figure 3. Fault tracing diagram for BACnet IP
Drive does not start from the bus
Check communi- cation status (par. Counter does not run Counter for bad frames (see Table 3) increases Counter OK.
No communication Poor communication
Is the device in READY state? Check the led on keypad Check external interlockings (I/O)
Is fieldbus selected as control place? Check parameter M1.15 or P3.2.1
Does Master give RUN command? Use keypad to monitor
FB Control
Set variable AV36 to ‘1’
Check fieldbus parameters Check other field- bus parameters
Check Master’s parameters Check IP address, gateway etc.
Check cabling Check cable for cuts Check correct place- ment of conductors in terminals
Other bus devices Check other necessary devices (e.g. switches)
Check cabling Check distances between cables, see chapter 4.2. Check cable types, see chapter 3.
Check connections Check stripping of cables and conductors, see chapter 4. Check e.gWLAN or other routers
7075A_uk
P5.9.3.2.2)
Word (M2.12)
Check BACnet IP ‘protocol
in use’ parameter (P5.9.3.1.4)