Parameter Number (Pnu); Index (Ind); Parameter Value (Pwe); Data Types Supported By The Frequency Converter - Danfoss VLT Midi Drive FC 280 Design Manual

RS485 Installation and Set-...
Fault code
0
1
2
3
4
5
6
7
9
11
5 5
15
17
18
100
>100
130
131
132
252
253
254
255
Table 5.7 Slave Report

5.4.8 Parameter Number (PNU)

Bits 0–11 transfer parameter numbers. The function of the
relevant parameter is defined in the parameter description
®
in the VLT Midi Drive FC 280 Programming Guide.

5.4.9 Index (IND)

The index is used with the parameter number to read/
write access parameters with an index, for example,
parameter 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.

5.4.10 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 several data options, for example
58
®
VLT Midi Drive FC 280
FC specification
Illegal parameter number.
Parameter cannot be changed.
Upper or lower limit is exceeded.
Subindex is corrupted.
No array.
Wrong data type.
Not used.
Not used.
Description element is not available.
No parameter write access.
No text available.
Not applicable while running.
Other errors.
–
–
No bus access for this parameter.
Write to factory set-up is not possible.
No LCP access.
Unknown viewer.
Request is not supported.
Unknown attribute.
No error.
Danfoss A/S © 03/2016 All rights reserved.
parameter 0-01 Language, select the data value by entering
the value in the PWE block. Serial communication is only
capable of reading parameters containing data type 9 (text
string).
Parameter 15-40 FC Type to parameter 15-53 Power Card
Serial Number contain data type 9.
For example, read the unit size and mains voltage range in
parameter 15-40 FC Type. When a text string is transferred
(read), the length of the telegram is variable, and the texts
are of different lengths. The telegram length is defined in
nd
the 2 byte of the telegram (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.
5.4.11 Data Types Supported by the
Frequency Converter
Unsigned means that there is no operational sign in the
telegram.
Data types
3
4
5
6
7
9
Table 5.8 Data Types

5.4.12 Conversion

The programming guide contains the descriptions of
attributes of each parameter. Parameter values are
transferred as whole numbers only. Conversion factors are
used to transfer decimals.
Parameter 4-12 Motor Speed Low Limit [Hz] has a conversion
factor of 0.1. To preset the minimum frequency to 10 Hz,
transfer the value 100. A conversion factor of 0.1 means
that the value transferred is multiplied by 0.1. The value
100 is thus perceived as 10.0.
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Text string
MG07B102