Danfoss VLT 5072 - Page 98

VLT® 5000 Crane
Appendix
PCD 1 PCD 2
Process block
3. Text block, used for reading or writing
texts via the data block.
PKE IND Ch1 Ch2 Ch
n
PCD1 PCD2
Tex t blo ck Process
block
1. Parameter bytes
Commands and replies (AK)
Bits no. 12-15 are used for transmitting commands
from master to slave and the slave’s processed
replies back to the master.
Parameter commands master⇒slave
Bit no.
15 14 13 12 Parameter command
0000Nocommand
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)
0 1 0 0 Read parameter description
element
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)
1111Readtext
Reply slave⇒master
Bit no. Response
15 14 13 12
0000Noresponse
0 0 0 1 Parameter value transferred
(word)
0 0 1 0 Parameter value transferred
(double word)
0 0 1 1 Parameter description element
transferred
0 1 1 1 Command cannot be performed
1 1 1 1 Text transferred
If the command cannot be executed, the slave will
send this reply: 0111 and give the following error
message in the parameter value (PWE):
Error code
(reply 0111)
Error message
0 The parameter number used
does not exist
1 There is no write access to the
parameter called
2 Data value exceeds
the parameter limits
3 The sub index used
does not exist
4 The parameter is not the array type
5 The data type does not ma
tch the
parameter called
17 Data change in the pa
rameter called
is not possible in
the present mode of the frequency
converter.
Eg. someparameters can only be
changed when the
motor has stopped
130 There is no bus access to the
parameter called
131 Data change is not possible because
factory Setup is sel
ected
Parameter number (PNU)
Bits no. 0-10 are used for transmitting parameter
numbers. The function of a given parameter
can be seen from the parameter description
in the Programming section.
I
ndex
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