Changing Parameters (Sequence 2) - HMS A8NDPV1 Instruction Manual

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Executing example requests
After compiling the program, and writing it to the PLC, it is possible to execute parameter read
requests. First, get the inverter running by setting bits M0 and M1. Now read the actual frequency
by writing PNU 9193 to requestParameterNo and setting bit requestParameter. The result should
be a value of 1000 in parameterValue which corresponds to 10Hz. The PROFIdrive parameter
numbers (PNUs) available for use are listed in the Data Exchange subchapters 7.1 to 7.4.
Try reading an inverter parameter, for example the FDL address of the inverter (parameter 1305
+ 5096 offset = PNU 6401). The expected result is 1. It is possible to read any inverter parameter
in this way.
3.12.2

Changing parameters (Sequence 2)

Creating the request
The format of the write request is as follows:
Byte no.
0
1
2
3
4
5
6-7
8-9
10
11
12-13
A8NDPV1 PROFIBUS Option Board
GX Works2 (FX-CPU) Acyclic communication example
Description
Request ID
Request reference
No. of parameters
DO-ID
No. of elements
Attribute value
Parameter number
Subindex (irrelevant)
No. of values
Format
Set value
Value
0x02
0x01-0xFF
0x01
0x01
0x00
0x10 (value attribute)
Byte swapped PNU
0x00
0x01
0x06 (UINTEGER16 for all inverter
parameters)
See data format type table
Byte swapped set value
85