Burkert Type 8793 - Manual (Page 233)

233
Maintenance and Troubleshooting
35.1.5. Error Messages on Field Bus Devices
Display Causes.of.error Remedial.action
MFI fault Field bus board defective. Not possible, device defective.
Table 127: Error Messages on Field Bus Devices
On.DeviceNet:
Display
(is displayed
approx. every
3 seconds) Device.status Explanation Troubleshooting
BUS offline Offline
Device is not connected to the bus.
The network access procedure
(Duplicate MAC-ID-Test, duration
approx. 2 s) has still not ended.
The device is the only active network
node.
• Check whether the baud rate has
been correctly set network-wide.
• Bus connection including plug
assignment correct.
• Check operating supply and bus
connection of the other nodes.
BUS no
connection
Online,
no connection
to the master
Device is connected correctly to the
bus, the network access procedure
has ended without errors, however
there is no established connection
to the master.
• New connection established by
master.
BUS timeout
I/O connection
timeout An I/O connection is in the TIME
OUT state.
• New connection established by
master.
• Ensure that I/O data is transferred
cyclically or, if COS confirmed, that
corresponding Acknowledge mes-
sages are sent by the master.
BUS critical err
Critical bus
error
Other device with the same
address in the network.
BUS offline due to communication
problems.
• Change address of the device and
restart device
• Error analysis in the network with a
bus monitor.
Table 128: Error message DeviceNet
On.PROFIBUS:
Display Device.status Explanation Troubleshooting
BUS offline
is displayed approx.
every 3 seconds
Offline.
Device is not connected to the
bus.
• Check bus connection including
plug assignment .
• Check operating voltage and bus
connection of the other nodes.
Table 129: Error message PROFIBUS
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Type 8792, 8793