D301271 1013 - FGEN - multi protocol
9-19
Bit areas: mapping of input-discrete- and coil-areas
9.4 Bit areas: mapping of input-discrete- and coil-areas
The digital in- and outputs can be read and written (for outputs) as registers in the data area of the
packed in- and output process data.
In order to set for example a single output (single coil), the following functions are available for reading
and writing single bits:
FC1 („Read Coils“),
FC2 („Read Discrete Inputs“),
FC 5 („Write Single Coil“)
FC15 („Write Multiple Coils“)
Data mapping in the input-discrete- and coil-areas:
Mapping: input-discrete
All digital inputs are stored in this area (offset "0").
Mapping: coils
All digital outputs are stored in this area (offset "0").
Note
In the packed process data, the digital I/O data are stored following the variable in- and
output data area of the intelligent I/Os, which means they are stored with a variable offset,
depending on the station’s I/O-configuration.
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