Implementing A Coupler With Higher-Level Control; Input Data; Output Data - WAGO I/O SYSTEM 750 750-641 Manual

16 • 750-641 [DALI/DSI Master Module]
Process Data

2.1.1.6.2 Implementing a Coupler with Higher-Level Control

By creating an IEC 61131-3 application for the higher-level control, detailed
process image of the module and coding in bytes of the process data is only
required when using a coupler.
Six data bytes are allocated in the process image of the coupler/controller by
the DALI/DSI Master Module in the input and output area.
The transfer of the data to be delivered and received takes place in 5 input and
5 output bytes. One control byte and one status byte are used to control the
data flow.
Further information
The individual commands and the corresponding codings in bytes are
described in detail in the sections "Command Sets acc. to DIN IEC 60929"
and "Extended Commands".

2.1.1.6.2.1 Input Data

Input data
Status
byte
The response of the Control Byte command is displayed in the Input Status
byte.

2.1.1.6.2.2 Output Data

Output data
Control
byte
The Control Byte sends output data commads to the module to control
functions.
Either a DALI individual address or a group address are recorded in byte D1
of the output data.
The requested command is determined in byte D0.
The selection of commands to be used is determined in byte D4.
If byte D4=0, the DALI standard commands will be used according to DIN
IEC 60929. In this case, the parameter bytes D2 and D3 are also equal to 0.
If byte D40, the extended commands which have been saved as macro in the
DALI/DSI Master Module will be accessed. The parameter bytes D2 and D3
are used for further extended parameters.
S D0
DALI response
C D0
DALI command,
DSI dimming value
D1 D2
DALI Message 3
address
D1 D2
DALI Parameter 2
address
D3 D4
Message 2 Message 1
D3 D4
Parameter 1 Command
extension
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