Parameter Number (Pnu); Index (Ind); Parameter Value (Pwe); Data Types Supported By Vlt Automationdrive - Danfoss VLT AAF00x Instruction Manual

RS-485 Installation and set...
0111 Command cannot be performed
- and issues the following fault report in the parameter
value (PWE):
PWE low Fault Report
(Hex)
0 The parameter number used does not exist
1 There is no write access to the defined parameter
2 Data value exceeds the parameter's limits
3 The sub index used does not exist
4 The parameter is not the array type.
5 The data type does not match the defined
parameter
11 Data change in the defined parameter is not
possible in the unit's present mode. Certain
parameters can only be changed when the motor
is turned off
82 There is no bus access to the defined parameter
83 Data change is not possible because the factory
set-up is selected.

7.3.8 Parameter Number (PNU)

Bits no. 0-11 transfer parameter numbers. The function of
the relevant parameter is defined in the parameter
description in the Programming Guide.

7.3.9 Index (IND)

The index is used together with the parameter number to
read/write-access parameters with an index, e.g.,
15-30 Alarm Log: Error Code. The index consists of 2 bytes,
a low byte and a high byte.
Only the low byte is used as an index.

7.3.10 Parameter Value (PWE)

The parameter value block consists of 2 words (4 bytes),
and the value depends on the defined command (AK). The
master prompts for a parameter value when the PWE block
contains no value. To change a parameter value (write),
write the new value in the PWE block and send from the
master to the slave.
When a slave responds to a parameter request (read
command), the present parameter value in the PWE block
is transferred and returned to the master. If a parameter
contains not a numerical value but several data options,
e.g., 0-01 Language where [0] corresponds to English, and
[4] corresponds to Danish, select the data value by
entering the value in the PWE block. See Example -
VLT Active Filter AAF 00x
Selecting a data value. Serial communication is only
capable of reading parameters containing data type 9 (text
string).
15-40 FC Type to 15-53 Power Card Serial Number contain
data type 9.
For example, read the unit size and AC line voltage range
in 15-40 FC Type. When a text string is transferred (read),
the length of the message is variable, and the texts are of
different lengths. The message length is defined in the
second byte of the message, LGE. When using text transfer
the index character indicates whether it is a read or a write
command.
To read a text via the PWE block, set the parameter
command (AK) to 'F' Hex. The index character high-byte
must be "4".
Some parameters contain text that can be written to via
the serial bus. To write a text via the PWE block, set the
parameter command (AK) to 'F' Hex. The index characters
high-byte must be "5".
7.3.11 Data Types Supported by VLT
Unsigned means that there is no operational sign in the
message.
Data types
3
4
5
6
7
9
10
13
33
35
®
MG.90.V2.22 - VLT is a registered Danfoss trademark
PKE IND PWE
Read text Fx xx 04 00
Write text Fx xx 05 00
AutomationDrive
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Text string
Byte string
Time difference
Reserved
Bit sequence
7
PWE
high low
7-5
7