ABB ACS880 Firmware Manual page 76

76 Program features
Three words of additional data can optionally be read from each follower. The
followers from which data is read are selected by parameter 60.14 in the master.
In each follower drive, the data to be sent is selected by parameters 61.1...61.3.
The data is transferred in integer format over the link, and displayed by parameters
62.28...62.36 in the master. The data can then be forwarded to other parameters
using 62.4...62.12.
To indicate faults in the followers, each follower must be configured to transmit
its status word as one of the above-mentioned data words. In the master, the
corresponding target parameter must be set to Follower SW. The action to be
taken when a follower is faulted is selected by parameter 60.17. External events
(see parameter group 31 Fault functions) can be used to indicate the status of
other bits of the status word.
For block diagrams of the master/follower communication are presented on pages
760 and 761.