• An extension rack is replaced with an extension rack with identical hardware.
Factory settings
The hardware configuration for each controller is created in the factory. If the hardware is changed, the controller activates a
Fieldbus conflict alarm. The controller hardware configuration must be confirmed in PICUS.
When a new extension rack is connected, the controller always activates a Fieldbus conflict alarm. The extension rack hardware
configuration must be confirmed in PICUS.
Topology examples
More information
See Wiring the communication, DEIF internal communication, Topology examples in the Installation instructions
for more information.
13.15.2 Fieldbus conflict
This alarm is for the internal communication between the controller and its extension units. If there is a hardware change or
hardware failure, this alarm communicates that the hardware configuration does not match the previous hardware configuration. Use
Configure > Fieldbus configuration in PICUS to correct the hardware configuration.
The alarm is always enabled, and the alarm action is Block. The alarm parameters are not visible.
13.15.3 Fieldbus connection missing
This alarm is for the internal communication between the controller and its extension units. If there is a redundancy connection, this
alarm communicates that an Ethernet connection is missing or broken.
The alarm is always enabled, and the alarm action is Block. The alarm parameters are not visible.
DESIGNER'S HANDBOOK 4189340911K UK Page 473 of 521
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