Parameter Number (Pnu); Index (Ind); Parameter Value (Pwe); Data Types Supported By The Frequency Converter - Danfoss VLT DriveMotor FCP 106 Programming Manual

RS-485 Installation and Set...
Bits no. 12-15 transfer parameter commands from master
to follower and return processed follower responses to the
master.
Parameter commands master ⇒ follower
Bit no. Parameter command
15 14 13 12
0 0 0 0 No command
0 0 0 1 Read parameter value
0 0 1 0 Write parameter value in RAM (word)
0 0 1 1 Write parameter value in RAM (double
word)
1 1 0 1 Write parameter value in RAM and
EEprom (double word)
1 1 1 0 Write parameter value in RAM and
EEprom (word)
1 1 1 1 Read text
Table 3.5 Parameter Commands
Response follower ⇒ master
Bit no. Response
15 14 13 12
0 0 0 0 No response
0 0 0 1 Parameter value transferred (word)
0 0 1 0 Parameter value transferred (double
word)
0 1 1 1 Command cannot be performed
1 1 1 1 text transferred
Table 3.6 Response
If the command cannot be performed, the follower sends
this response:
0111 Command cannot be performed
- and issues the following fault report in the parameter
value:
Error code
0 Illegal Parameter Number
2 Upper or lower limit exceeded
3 Subindex corrupted
4 No Array
5 Wrong Data Type
6 Not used
7 Not used
17 Not while Running
18 Other error
23 Parameter database is busy
100
>100
130 No bus access for this parameter
132 No LCP access
255 No error
Table 3.7 Follower Report
®
VLT DriveMotor FCP 106 and FCM 106 Programming Guide
+ Specification
MG03N102 - Rev. 2013-12-02

3.4.8 Parameter Number (PNU)

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

3.4.9 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. Index (IND)
Only the low byte is used as an index.

3.4.10 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 follower.
When a follower 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, e.g.
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
the second 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".
3.4.11 Data Types Supported by the
Frequency Converter
Unsigned means that there is no operational sign in the
telegram.
3 3
21