iSMA-B-AAC20/Sedona Modbus
Version 1.3
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Coil status -
Or simply “coils”: single
-bit flags that represent the status of Digital (Boolean)
Outputs of the slave, that is, On/Off output status. A Modbus Master can both read from
and write to coils.
Input status -
Or simply “inputs”: single
-bit flags that represent the status of Digital (Boolean)
Inputs of the slave, that is, On/Off output status. A Modbus Master can read (only) inputs.
Input register - Are 16-bit registers that store data collected from the field by the Modbus
Slave. The Modbus Master can read (only) input registers.
Holding register - Are 16-bit registers that store general-purpose data in the Modbus Slave.
The Modbus Master can both read from and write to input registers.