PKW parameter area
This data area is composed of ID, IND, VALUE_high and VALUE_low, as
shown in figure below. They are used to read or modify the parameter of a
certain function code of frequency converter, but only one function code can
be read or modified each time. When master gives request and slave makes
response, bit definition for each specific word in PKW area is shown in tab.
12-25 "Request data frame in PKW area_from master to slave" on page 237
and tab. 12-26 "Response data frame in PKW area_from slave to master" on
page 238. If frequency converter fails to execute PKW area request com‐
mand, it will return fault code to the master in VALUE_low. Refer to tab.
12-27 "PKW area fault codes" on page 238 for details.
Fig. 12-7: PKW area data format
● Request data frame in PKW area
Word Identifier bit Value Description
1
st
ID
15...12
0000B No task
0001B Request to read function code parameter
0010B Request to modify function code parameter
Others Illegal command code
11 0/1B Reserved
10...8 000B
Group No. for function code parameter
7...0 xxH
2
nd
IND
15...8 xxH Index serial number of function code within the group
7...0 0 Reserved, default is 0
3
rd
VALUE_high 15...0 0 Reserved, default is 0
4
th
VALUE_low 15...0 xxxxH
1. When reading parameters, default is 0.
2. When modifying parameters, it is modified value.
3. It can be of any value in case of no operation.
Tab. 12-25: Request data frame in PKW area_from master to slave
For addressing of parameter function group and the index serial
No. within the group, please refer to chapter "Addressing of com‐
munications function code parameter group and index number
within the group" on page 246.
DOK-RCON02-FV*********-IB08-EN-P Bosch Rexroth AG 237/259
Rexroth Frequency Converter Fv
Communication Protocols
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