Specifications

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8.4.7 The PKE Field

The PKE field contains 2 sub-fields: Parameter command

and response AK, and Parameter number PNU:

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

130BA268.10

PKE IND

PWE

high

PWE

low

AK PNU

Parameter

commands

and replies

Parameter

number

Illustration 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

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 low

(Hex)

Fault Report

0 The parameter number used does not exit

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 exit

4 The parameter is not the array type

5 The data type does not match the defined

parameter

11 Data change in the defined parameter is not

possible in the frequency converter's present

mode. Certain parameters can only be changed

when the motor is turned off

82 There is no bus access to the defined parameter

83 Data change is not possible because factory setup

is selected

Table 8.7 Parameter Value Fault Report

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 2 bytes,

a low byte and a high byte.

Only the low byte is used as an index.

8.4.10

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 not a numerical value, but several data options,

e.g. 0-01 Language where [0] is English, and [4] is Danish,

select the data value by entering the value in the PWE

block. See Example - Selecting a data value. Serial

Installation and Set-up

Design Guide