Danfoss VLT 8000 AQUA series User Manual

VLT
®
8000 AQUA
If the command cannot be carried out, the slave
will send this reply (0111) Command cannot be
executed and give the following error message
in the parameter value (PWE):
(reply 0111) Error message
0 The parameter number used does
not exist
1 There is no write access to the
parameter called
2 The data value exceeds the
parameter limits
3 The used sub-index does not exist
4 The parameter is not of the array
type
5 The data type does not match the
parameter called
17 Data change in the parameter
called is not possible in the
present mode of the frequency
converter. E.g. some parameters
can only be changed when the
motor has stopped
130 There is no bus access to the
parameter called
131 Data change is not possible
because factory Setup has been
selected
Parameter number PNU)
Bits no. 0-10 are used for transmitting parameter
numbers. The functio
n of a given parameter is defined in
the parameter description in the Programming section.
I
ndex
Index is used together with the parameter number for
read/write access to parameters with an index, such
as parameter 615 Error code. Index has 2 bytes - a
lowbyteandahighbyte. However,onlythelowbyte
is used. See example on the following page.
E
xample - Index:
The first error code (index [1]) in parameter 615
Error code must be read.
PKE = 1267 Hex (read parameter 615 Error code).
IND = 0001 Hex - Index no. 1.
The frequency converter will respond in the parameter
value (PWE) block by means of an error code
with a value from 1-99. See List of warnings and
alarms to identify the error code.
Parameter value (PWE)
The parameter value block consists of 2 words
(4 bytes) and its value depends on the command
given (AK). If the master enquires about a parameter
value, the PWE block contains no value.
If a parameter value is to be changed by the
master (write), the new value is entered in the
PWE block and sent to the slave.
If the slave responds to a parameter requirement (read
command), the present parameter value is transferred
in the PWE block and returned to the master.
If a parameter does not contain a numerical value, but
several data selection options, e.g. parameter 001
Language,where[0]isEnglish and [1] is Danish,the
data value is selected by writing the value in the PWE
block. See example on the following page.
Via the serial communication it is only possible to read
parameters with data type 9 (text string). In VLT 8000
AQUA, parameters 621-631 Nameplate data have data
type 9. For example, it is possible in parameter 621
(Unit Type) to read the unit size and mains voltage range.
When a text string is transferred (read), the telegram
length is variable, since the texts have different
lengths. The telegram length is stated in the 2nd
byte of the telegram, called LGE.
In order to read a text via the PWE block, the parameter
command (AK) must be set to ’F’ Hex.
MG.83.A2.02 - VLT is a registered Danfoss trademark
152

Danfoss VLT 8000 AQUA series Specifications

General

Brand	Danfoss
Model	VLT 8000 AQUA series
Category	DC Drives
Language	English