Burkert Type 8630 - Manual (Page 146)

144 - 8630
D
EVICE
N
ET
Bus status display
The bus standard is indicated on the display.
Display
message Device status Explanation/problem elimination
BUS OFFL
alternates with
the display
value set
offline Device is not connected to the bus; the network access
procedure (Duplicate MAC-ID-Test, duration 2 s) has not yet
ended or the device is the sole active network subscriber.
- Is the baud rate correctly set throughout the network?
- Is the bus connection incl. plug in assignment correct?
- Is the voltage supply and bus connection of the other
subscribers correct?
BUS NOCO
alternates with
the set
indication
value
online,
no connection to
Master
Device is correctly connected to the bus, the network access
procedure has been completed without error, but no
connection is established with the Master.
2 dots
left, under the
set indication
value
online,
Explicit Messaging
only
Messaging connection with Master is established. No I/O
connection is in the Established state (no I/O data exchange).
4 dots
left, under the
set indication
value
online,
active I/O connection An I/O connection is in the Established state (I/O data
exchange).
BUS TIME
alternates with
the set
indication
value
I/O connection
Timeout
An I/O connection is in the TIME OUT state.
- new establishmend of connection by Master; ensure the
I/O data are transferred cyclically, or with confirmedCOS,
the corresponding Acknowledge Messages are sent by the
Master.
BUS CRIT
alternates with
the set
indication
value
critical bus error Different device with same address in the network, or BUS
OFF due to communication problems:
- change address of device and restart device.
- error analysis in network with a bus monitor.