ABB AC 800M

Hot Swap of LD 800DN Section 2 Functional Description
44 9ARD000014-600 A
Hot Swap of LD 800DN
LD 800DN devices supports hot swap. Faulty units can be replaced online and
status is communicated to the CI873. After the hot insertion of new linking device
unit, CI873 configures the linking device automatically.
Hot Swap of DeviceNet Devices
Hot swap of DeviceNet devices is supported through the Automatic Device
Recovery (ADR) feature of the LD 800DN linking device. Faulty units can be
replaced online without disturbing the communication with other DeviceNet slaves
in the network.
Automatic Device Recovery
Automatic Device Recovery (ADR) is a feature of the LD 800DN linking device.
This feature allows a DeviceNet slave node to be replaced with another device of the
same type.
In this feature, if a DeviceNet slave device drops off the network due to fault or
power loss, and is replaced with another device of the same type, then LD 800DN
automatically configures the new device (the replacement) to the MAC ID address
downloaded for the device in the Control Builder.
The ADR feature consists of Address Recovery and Configuration Recovery.
Address Recovery automatically sets the address of the new slave device to that of
the slave device which has lost communication, provided the new device is inserted
at MAC ID 63. Address Recovery is enabled by enabling the ADR parameter of the
LD 800DN.
Configuration Recovery automatically configures the new slave device to the
settings of the slave device it replaces. For enabling Configuration Recovery, both
the ADR parameter of the LD 800DN and the Config Recovery parameter of the
associated DeviceNet device should be enabled.
When a DeviceNet slave is replaced with a new one, the linking device LD 800DN
checks the identity of the new device before performing any operation. The extent of
The new linking device replacing the faulty unit should be configured with the
same IP address and MAC ID used previously.