The Pke Field; Parameter Number (Pnu); Index (Ind) - Danfoss VLT HVAC Basic Drive FC 101 Design Manual

RS485 Installation and Set-...
STX LGE ADR
Illustration 7.7 Parameter Block
Text block
The text block is used to read or write texts via the data
block.
STX LGE ADR PKE
Illustration 7.8 Text Block

7.4.7 The PKE Field

The PKE field contains 2 subfields:
•
Parameter command and response (AK)
7 7
•

Parameter number (PNU)

AK
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Illustration 7.9 PKE Field
Bits 12–15 transfer parameter commands from master to
slave and return processed slave responses to the master.
Parameter commands master⇒slave
Bit number
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 7.5 Parameter Commands
84
PKE IND PWE PWE PCD1
high low
IND Ch1 Ch2 Chn PCD1
PKE IND PWE
high
PNU
Parameter command
12
0 No command.
1 Read parameter value.
0 Write parameter value in RAM (word).
Write parameter value in RAM (double
1
word).
Write parameter value in RAM and
1
EEPROM (double word).
Write parameter value in RAM and
0
EEPROM (word).
1 Read text.
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®
VLT HVAC Basic Drive FC 101
PCD2 BCC
Bit number
15 14
0
0
0
0
1
PCD2 BCC
Table 7.6 Response
If the command cannot be performed, the slave sends
0111 Command cannot be performed response and issues
the following fault reports in Table 7.7.
Fault code
PWE
low
>100
Table 7.7 Slave Report
7.4.8 Parameter Number (PNU)
Bit numbers 0–11 transfer parameter numbers. The
function of the relevant parameter is defined in the
parameter description in chapter 6 Programming.

7.4.9 Index (IND)

The index is used with the parameter number to read/
write access parameters with an index, for example,
parameter 15-30 Alarm Log: Error Code. The index consists
of 2 bytes: a low byte and a high byte.
Response slave⇒master
Response
13 12
0 0 0 No response.
0 0 1 Parameter value transferred (word).
Parameter value transferred (double
0 1 0
word).
1 1 1 Command cannot be performed.
1 1 1 Text transferred.
FC specification
0 Illegal parameter number.
1 Parameter cannot be changed.
2 Upper or lower limit is exceeded.
3 Subindex is corrupted.
4 No array.
5 Wrong data type.
6 Not used.
7 Not used.
9 Description element is not available.
11 No parameter write access.
15 No text available.
17 Not applicable while running.
18 Other errors.
100 –
–
130 No bus access for this parameter.
131 Write to factory set-up is not possible.
132 No LCP access.
252 Unknown viewer.
253 Request is not supported.
254 Unknown attribute.
255 No error.
MG18C702