Meanings of the values sent in the order label – NORD Drivesystems BU0020 User Manual

Page 84

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PROFIBUS DP

– Supplementary manual options for NORD - Frequency Inverters

84

BU 0020 GB-2612

Note

With the Profibus protocol, the inverter parameters are mapped in the range from 1000
to 1999 i.e. for parameterisation via the bus, 1000 must be added to the parameter
numbers (e.g. P508 PNU=1508).

SPM

Bit 11 is the toggle-bit for spontaneous messages. This function is not supported!

AK

Bits 12 to 15 contain the order or response label.

Note

Both the order label and the response label are abbreviated as AK. Therefore, care must
be taken when reading or interpreting the order processing description in this section.

Meanings of the values sent in the order label,:

The following table lists all the orders which can be transferred from the master to the inverter. The
right-hand column contains the response, which is normally sent (response label positive). Only
certain response labels are possible, depending on the order label. In case of error (AK negative) the
inverter will always supply the value 7 in the response label (AK) to the master.

AK

Function

Response label positive

0

No order

0

1

Order parameter value

1 / 2

2

Change parameter value (word)

1

3

Change parameter value (double word)

2

4

Reserved

-

5

Reserved

-

6

Order parameter value (array)

4 / 5

7

Change parameter value (array word)

4

8

Change parameter value (array double word)

5

9

Order the number of array elements

6

10

Reserved

-

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