The Pke Field - Danfoss VLT AutomationDrive FC 300 Design Manual

RS-485 Installation and Set...
Parameter block
The parameter block is used to transfer parameters between master and follower. The data block is made up of 12 bytes (6
words) and also contains the process block.
STX
Illustration 10.7 Parameter block
Text block
The text block is used to read or write texts via the data block.
STX LGE
Illustration 10.8 Text Block

10.7.7 The PKE Field

The PKE field contains 2 sub fields:
•
Parameter command and response AK
•
Parameter number PNU
10 10
AK
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Illustration 10.9 PKE Field
Bits no. 12–15 transfer parameter commands from master
to follower and return processed follower responses to the
master.
244
LGE ADR PKE IND
ADR PKE IND
PKE IND
PWE
high
PNU
®
VLT AutomationDrive FC 300 Design Guide 90-1200 kW
PWE PWE
high low
Ch1 Ch2 Chn
Bit no.
15 14
0 0
0 0
0 0
0 0
1 1
PWE
low
1 1
1 1
Table 10.3 Parameter Commands Master⇒Follower
Bit no.
15 14
0 0
0 0
0 0
0 1
1 1
Table 10.4 Response Follower⇒Master
MG34S202 - Rev. 2013-08-19
PCD1 PCD2
PCD1 PCD2
Parameter command
13 12
0 0 No command
0 1 Read parameter value
1 0 Write parameter value in RAM (word)
1 1 Write parameter value in RAM (double
word)
0 1 Write parameter value in RAM and
EEprom (double word)
1 0 Write parameter value in RAM and
EEprom (word)
1 1 Read/write text
Response
13 12
0 0 No response
0 1 Parameter value transferred (word)
1 0 Parameter value transferred (double
word)
1 1 Command cannot be performed
1 1 text transferred
BCC
BCC