Danfoss VT2800 Series User Manual

VLT
®
2800 Series
■ Data Character (byte)
The structure of data blocks depends on the type
of telegram. There are three types of telegram,
and the type of telegram applies for both control
telegrams ( ma ster⇒slave) and response telegrams
(slave⇒master). The three types of telegram a re:
- Parameter block, 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.
- The process block is made up of a data block
of four bytes (2 words) and co ntains:
- C ontrol word and reference value
- Status word and present output frequency
(from slave to master)
- Text block, which is used to read or write
textsviathedatablock.
Parameter commands a nd responses (AK).
Bits no. 12-15 are used to transfer parameter
commands from master to slave and the slave’s
processed responses back to the master.
Parameter commands master⇒slave
Bit no.
15 14 13 12 Parameter comm and
0 0 0 0 No command
0 0 0 1 Read parameter value
0 0 1 0 Write parame ter value in RAM
(word)
0 0 1 1 Write parame ter value in RAM
(double word)
1 1 0 1 Write parame ter value in RAM
and EEprom (double word)
1 1 1 0 Write parame ter value in RAM
and EEprom (word)
1111Read/writetext
Response slave⇒master
Bit no. Response
15 14 13 12
0000Noresponse
0 0 0 1 Parameter value transferred
(word)
0 0 1 0 Parameter valu e transferred
(double word)
0 1 1 1 Command cannot be performed
1111Texttransferred
If the command cannot be performed the slave
sends this response: 0111 Command cannot
be performed and gives the following fault report
in the parameter value (PWE):
Response
(0111)
Fault report
0Theparameternumberused
does not exist
1 There is no write access to the
defined parameter
2 Data value exceeds
the param eter’slimits
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
frequency
converter’spresentmode.
Certain parame ters ca n 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 S etup is selected
MG.28.E9.02 - VLT is a registered Danfoss trademark
110

Danfoss VT2800 Series Specifications

General

Brand	Danfoss
Model	VT2800 Series
Category	Controller
Language	English