Danfoss VLT Micro Drive FC 51 Design Manual page 75

RS-485 Installation and Set...
8.4.7 The PKE Field
The PKE field contains two subfields: Parameter command
and response (AK) and Parameter number (PNU):
AK
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Illustration 8.9
8 8
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.
15 14 13
0 0 0
0 0 0
0 0 1
0 0 1
1 1 0
1 1 1
1 1 1
Table 8.5
Response slave ⇒master
Bit no.
15 14 13
0 0 0
0 0 0
0 0 1
0 1 1
1 1 1
Table 8.6
If the command cannot be performed, the slave sends this
response:
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VLT
PKE IND PWE
high
PNU
Parameter command
12
0 No command
1 Read parameter value
0 Write parameter value in RAM (word)
1 Write parameter value in RAM (double
word)
1 Write parameter value in RAM and
EEprom (double word)
0 Write parameter value in RAM and
EEprom (word)
1 Read text
Response
12
0 No response
1 Parameter value transferred (word)
0 Parameter value transferred (double
word)
1 Command cannot be performed
1 text transferred
MG02K202 - VLT
®
Micro Drive FC 51 Design Guide
0111 Command cannot be performed
- and issues the following fault report in the parameter
value:
Error code
0
PWE
low
1
2
3
4
5
6
7
9
11
15
17
18
100
>100
130
131
132
252
253
254
255
Table 8.7
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 the VLT Micro Drive Programming Guide,
MG02C.
8.4.9 Index (IND)
The index is used together with the parameter number to
read/write-access parameters with an index, for example,
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.
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is a registered Danfoss trademark
FC+ Specification
Illegal Parameter Number
Parameter cannot be changed.
Upper or lower limit exceeded
Subindex corrupted
No Array
Wrong Data Type
Not used
Not used
Description element not available
No parameter write access
No text available
Not while Running
Other error
No bus access for this parameter
Write to factory set-up not possible
No LCP access
Unknown viewer
Request not supported
Unknown attribute
No error