BONFIGLIOLI Vectron ACTIVE CUBE - Page 41

Data set access messages for parameter access are special PROFINET messages
which are sent only if a parameter is required. Unlike in the case of PKW objects,
data access messages can access all parameter types, including string type parame-
ters.
The S7 PLC uses two special functions, SFC58 WR_REC and SFC59 RD_REC, for
data set access. Addressing is carried out based on the diagnosis address of the
device to be accessed (Slot 0 / Sub-slot 1 / Index). “Index” addresses the accessed
parameters using the following code:
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
Data set
Parameter number
Permissible index range = 0 … 0x7FFF
Data types and byte arrangement
Byte
0
1
2
3
4
5
…
….
max. 98
Data type
uint/int
Contents
high byte low byte
Data type
long
Contents
high byte low byte
Data type
string
Contents
first char.
uint/int = 2 bytes
long = 4 bytes
string = 1 … 99 bytes
In order to access the parameters of the individual frequency inverters through Sys-
tem Bus, Parameter 1600 is set to the ID of the relevant Systembus node.
The data type of 1600 is an unsigned integer, value range 0…63.
Parameter 1600 can be read and written.
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