Danfoss FC 100 Series Especificaciones descargar pdf (Pagina 68)

The 3 types of are:

Process block (PCD)

The PCD is made up of a data block of 4 bytes (2 words) and contains:

- Control word and reference value (from master to slave)

- Status word and present output frequency (from slave to master)

ADRLGESTX PCD1 PCD2 BCC

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Parameter block

The parameter block is used to transfer parameters between master and slave. The data block is made up of 12 bytes (6

words) and also contains the process block.

PKE INDADRLGESTX PCD1 PCD2 BCC

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PWE

high

PWE

low

Text block

The text block is used to read or write texts via the data block.

PKE IND

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ADRLGESTX PCD1 PCD2 BCCCh1 Ch2 Chn

7.4.7 The PKE Field

The PKE field contains two subfields: 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

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PKE IND

PWE

high

PWE

low

AK PNU

Parameter

commands

and replies

Parameter

number

Bits no. 12-15 transfer parameter commands from master

to slave and return processed slave responses to the

master.

Parameter commands master ⇒ slave

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

Response slave ⇒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

If the command cannot be performed, the slave sends this

response:

0111 Command cannot be performed

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