HMS Networks Anybus Communicator ABC3028 User Manual page 80

Communicator Configuration
7.10.7 Live List
By default Live list is disabled.
When Live list is enabled, the first four bytes of process data on the Modbus TCP network
contain the live list.
The Live list holds 32 bits.
Each bit in the Live list can hold the status for a total of 32 nodes connected to the
Communicator.
The bit is 0 when the bit does not correspond to the configured node. For example, this occurs
when the number of configured nodes is less than 32.
Each bit is 1 when the corresponding node is online.
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Anybus Communicator User Manual
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