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Response
Fault report
(0111)
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
17
Data change in the defined para-
meter is not possible in the variable
frequency
drive's present mode.
Certain parameters can only be
changed
when the motor is turned off
130
There is no bus access to the
defined parameter
131
Data change is not possible because
factory Setup is selected
Parameter number (PNU)
Bits no. 0-10 are used to transfer parameter
numbers. The relevant parameter's function
is defined in the parameter description in the
section entitled Programming.
Index
Index is used together with the parameter number
to read/write-access parameters that have an index,
e.g. parameter 615 Error code . The index is made
up of 2 bytes, one lowbyte and one highbyte, but
only the lowbyte is used as an index.
Example - 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.
152
Decentral Solutions
The variable frequency drive will respond in the
parameter value block (PWE) with a fault code
value from 1 - 99. See Summary of Warnings and
Alarms to identify the fault code.
Parameter value (PWE)
The parameter value block consists of 2 words
(4 bytes), and the value depends on the defined
command (AK). If the master prompts for a parameter
value, the PWE block does not contain a value.
If you wish the master to change a parameter
value (write), the new value is written in the PWE
block and sent to the slave.
If the 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. parameter 001
Language where [0] corresponds to English ,
and [3] corresponds to Danish, the data value is
selected by entering the value in the PWE block.
See Example - Selecting a data value.
Via serial communication it is only possible to read
parameters that have data type 9 (text string).
Parameter 621 - 635 Nameplate data is data type 9.
For example, in parameter 621 Unit type it is possible
to read the unit size and electrical voltage range.
When a text string is transferred (read) the length of
the telegram is variable, as the texts are of different
lengths. The telegram length is defined in the
telegram's second byte, known as LGE.
To be able to read a text via the PWE block the
parameter command (AK) must be set to 'F' Hex.
MG.90.F2.22 - VLT is a registered Danfoss trademark
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