The Pke Field; Parameter Number (Pnu); Index (Ind) - Danfoss VLT FC 102 Series Design Manual

Installation and Set-up

8.4.7 The PKE Field

The PKE field contains two subfields: Parameter command
and response AK, and parameter number PNU:
PKE IND
AK PNU
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Figure 8.10 PKE Field
Bits no. 12-15 transfer parameter commands from master
to follower and return processed follower responses to the
master.
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/write text
Table 8.5 Parameter Commands Master ⇒ Follower
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 8.6 Response Follower⇒ Master
MG11BC22
Design Guide
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 (PWE):
PWE PWE
high low PWE low
(Hex)
0
1
2
3
4
5
11
82
83

8.4.8 Parameter Number (PNU)

Bits no. 0-11 transfer parameter numbers. The function of
the relevant parameter is defined in the parameter
description in chapter 8.11.1 Control Word According to FC
Profile (8-10 Control Profile = FC profile).

8.4.9 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 two
bytes, a low byte and a high byte.
Only the low byte is used as an index.
Danfoss A/S © Rev. 06/2014 All rights reserved.
Fault Report
The parameter number used does not exist
There is no write access to the defined parameter
Data value exceeds the parameter's limits
The sub index used does not exist
The parameter is not the array type
The data type does not match the defined
parameter
Data change in the defined parameter is not
possible in the adjustable frequency drive's
present mode. Certain parameters can only be
changed when the motor is turned off
There is no bus access to the defined parameter
Data change is not possible because the factory
set-up is selected
Table 8.7 Parameter Value Fault Report
8 8
151