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Process block (PCD)
The PCD is made up of a data block of 4 bytes (2 words) and contains:
-
Control word and reference value (from master to slave)
-
Status word and present output frequency (from slave to master)
ADR
LGE
STX
PCD1
PCD2
BCC
130BA269.10
Parameter block
The parameter block is used to transfer parameters between master and slave. The data block is made up of 12 bytes (6
words) and also contains the process block.
PKE
IND
ADR
LGE
STX
PCD1
PCD2
BCC
130BA271.10
PWE
high
PWE
low
Text block
The text block is used to read or write texts via the data block.
PKE
IND
130BA270.10
ADR
LGE
STX
PCD1
PCD2
BCC
Ch1
Ch2
Chn
11.6.7 The PKE Field
The PKE field contains two sub-fields: Parameter command and response AK, and Parameter number PNU:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
130BA268.10
PKE
IND
PWE
high
PWE
low
AK
PNU
Par
amet
er
commands
and r
eplies
Par
amet
er
number
Bits no. 12-15 transfer parameter commands from master to slave and return processed slave responses to the master.
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FC 300 Design Guide
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