Process Data Channel Control I - GE Profibus - DP Bus Instructions Manual

Profibus-DP
Bus
4. PROCESS DATA CHANNEL CONTROL
This function allows the assignment of the drive parameter to the Process Data Channel Words.
The Profibus-DP interface card uses four words (WORD) for the Process Data Channel (abbr. PDC Process
Data Channel ).
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The Process Data Channel for the 6KCV300PDPB 1 card has the following configuration:
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WORD 0
WORD 1 WORD 2 WORD 3
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The Slave can both read and write Process Data Channel data.
The data read from Profibus-DP by the Slave are referred to as output data; the data written in Profibus-DP by
the Slave are referred to as input data.
Process Data
Drive parameters
Process Data
't
Input data descriptor
,
Channel Control :
Output data descriptor
Process Daja
Drive paraqneters
The Slave parameters are cyclically read by the Master by assigning drive parameters to the "PDC input data
descriptor" communication object.
The Master cyclically transmits drive parameters to the Slave by assigning drive parameters to the "PDC output
data descriptor" communication object.
The process data assignment to specific drive parameters must be set. The "PDC input data descriptor" and
"PDC
output data descriptor" communication objects are used for this aim.
PROCESS DATA CHANNEL CONTROL
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