Danfoss VLT AAF00x, Руководство по эксплуатации

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The 3 types of telegram are:
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
7.3.7 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.
Parameter commands master
⇒
slave
Bit no. Parameter command
15 14 13 12
0 0 0 0 No command
0 0 0 1 Read parameter value
0 0 1 0 Write parameter value in RAM (word)
0 0 1 1 Write parameter value in RAM (double
word)
1 1 0 1 Write parameter value in RAM and
EEprom (double word)
1 1 1 0 Write parameter value in RAM and
EEprom (word)
1 1 1 1 Read/write text
Response slave
⇒
master
Bit no. Response
15 14 13 12
0 0 0 0 No response
0 0 0 1 Parameter value transferred (word)
0 0 1 0 Parameter value transferred (double
word)
0 1 1 1 Command cannot be performed
1 1 1 1 text transferred
RS-485 Installation and Set... VLT Active Filter AAF 00x
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