Reading An Array Of Parameters (Sequence 3) - HMS A8NDPV1 Instruction Manual

Plug-in option, profibus communication interface
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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.
3.6.2

Reading an array of parameters (Sequence 3)

Certain parameters are available in the form of an array. It is possible to access individual ele-
ments of the array be changing the subindex. It is also possible to retrieve multiple elements of
the array by executing sequence 3. This requires only changing byte no. 4 of the request (No. of
values) to the amount of array values wanted. The response will contain additional parameter
values added to the end of the response data.
Creating the request
For this example all 5 array elements of PNU 964 (Device identification) will be requested. Modify
the parameter request as described above:
A8NDPV1 PROFIBUS Option Board
GX Works2 (Q-CPU) Acyclic communication example
37

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