VLT® 5000/ 5000 FLUX/ 6000 HVAC/
8000 AQUA PROFIBUS
STW
0F07Hex means that the motor is running and that
no warnings or errors are present (further details
can be found in the status word table).
MAV
2000Hex indicates that the output frequency is
50% of the maximum frequency.
PCD1
HEX F6 = 246 decimal. The conversion index for
parameter 520 is -2, i.e. the value must be divided by
100. Thus, the present motor current is: 2.46 A
PCD2
Hex 28 = 0010 1000 binary. The allocation of the digits:
(digital inputs of the frequency converter)
This means that input 18 and input 27 of the
frequency converter are switched.
PCD3
Hex FA = 250 decimal. The conversion index for
parameter 518 is -1, i.e. the value must be divided by
10. Thus, the instantaneous frequency is 25.0 Hz.
PCD4
Hex 2F8 = 760 decimal. The conversion index for
parameter 529 is -2, i.e. the value must be divided
by 100. Thus, the instantaneous voltage at terminal
53 of the frequency converter is: 7.60 Volt.
NB!:
Information concerning the conversion
index for each parameter can be found
in the parameter list.
The explanation of the column headings for the
parameter table can be found in the section "Parameter
and data structures" (keyword: size attribute).
■
Example 3: Array treatment
Example for addressing an array parameter.
Assumption: as in the previous examples, the
frequency converter is running. Now, the variable
process data are not to be preconfigured on the
display, but are to be configured through the PCV
portion (of the PPO2) instead.
For example, only the PCD 1 will be configured
for the display of the motor current.
Master telegram (PPO2)
The master sends the following telegram to
the frequency converter:
Byte
Value (Hex)
PCA
1 and 2
7394
PCV
IND
3 and 4
0100
PVA
5 and 6
0000
PVA
7 and 8
0208
CTW
9 and 10
047F
MRV
11 and 12
2000
PCD1
13 and 14
0000
PCD2
15 and 16
0000
PCD3
17 and 18
0000
PCD4
19 and 20
0000
PCA
Hex 7 corresponds to "change parameter value
(array word)" in the RC portion of the PCA.
Hex 394 = 916 decimal.
The parameter 916 is used to configure the PCD-Read.
Since a subindex is required to configure the
parameter, the parameter 916 is an array.
IND
Hex 01 in byte 3 is used for the assignment
to PCD 1. The byte 4 is not used and is thus
filled with Hex 00 by the master.
PVA
In the high portion of the PVA is Hex 0000. In the
low portion of the PVA is Hex 0208 = 520 decimal.
The parameter number for the display of the of the
motor current is thus assigned to the PCD 1.
CTW and MRV
For an explanation of the Control word and of the
main reference value see example 1.
PCD 1 to 4
Since PPO 2 is used, PCD1-4 must be transmitted by
the master (filled with zeros as the PCD-Write
are not defined).
VLT response telegram (PPO2)
The frequency converter might send back the
following telegram to the master:
Byte
Value (Hex)
PCA
1 and 2
4394
PCV
IND
3 and 4
0100
PVA
5 and 6
0000
PVA
7 and 8
0208
STW
9 and 10
0F07
MAV
11 and 12
2000
PCD1
13 and 14
00F6
PCD2
15 and 16
0000
PCD3
17 and 18
0000
PCD4
19 and 20
0000
MG.90.G1.02 - VLT is a registered Danfoss trademark
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Содержание VLT 5000 Series
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