Burkert Type 8645 - Manual (Page 35)

ConfiGuraTion anD funCTion of The moDules
English
8645 - 5
Troubleshooting�
Bus Error
LED Status Description cause of Error
BUS (BO) OFF
Response monitoring time on
FreeLINE has expired.
The master has not responded.
During commissioning:
Check network configuration at master
(controller) and station address of the
valve cluster.
During operations:
Check master (controller) and bus
cable.
BUS (BF) ON
FS OFF
FN OFF
U
i
ON
U
O
ON
U
S
ON
Global control Operate only
LED Status Description cause of Error
BUS (BO) OFF The fieldbus module is ready for the
status “Data Exchange”, but the
master sends no Global Control
Operate telegram [e.g. if the PLC is at
Stop (Global Control Clear)]. This status does not represent an
error. The function can, however, be
bypassed in the parameter telegram
(see chapter
Commissioning).
BUS (BF) FLASHING
FS OFF
FN OFF
U
i
ON
U
O
ON
U
S
ON