Bus Status Display - Burkert 8630 Operating Instructions Manual

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EVICE ET

Bus status display

The bus standard is indicated on the display.
Display
message
BUS OFFL
alternates with
the display
value set
BUS NOCO
alternates with
the set
indication
value
2 dots
left, under the
set indication
value
4 dots
left, under the
set indication
value
BUS TIME
alternates with
the set
indication
value
BUS CRIT
alternates with
the set
indication
value
144 - 8630
Device status
offline
online,
no connection to
Master
online,
Explicit Messaging
only
online,
active I/O connection
I/O connection
Timeout
critical bus error
Explanation/problem elimination
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?
Device is correctly connected to the bus, the network access
procedure has been completed without error, but no
connection is established with the Master.
Messaging connection with Master is established. No I/O
connection is in the Established state (no I/O data exchange).
An I/O connection is in the Established state (I/O data
exchange).
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.
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.