MG.90.A2.02 – VLT is a registered Danfoss trademark
18
FCM 300 PROFIBUS / VLT 2800 PROFIBUS
DP
■
Parameter and data type structure description
Parameter description:
DP has a number of describing attributes (see rigth).
Read/write on parameter description is made by the
PCV part using the RC commands 4/5 and subindex
of the desired description element.
Size attribute
The
size index
and the
conversion index
for each
parameter can be taken from the parameter list on
page 36.
Physical unit
Size index
Measuring unit
Designation
Conversion index
Conversion factor
0
No dimension
0
1
second
s
0
1
-1
0.1
-2
0.01
Time
4
millisecond
ms
-3
0.001
minute
min
70
60
hour
h
74
3600
day
d
77
86400
watthour
Wh
0
1
Energy
8
kilowatthour
kWh
3
1000
megawatthour
MWh
6
10
6
milliwatt
mW
-3
0.001
watt
W
0
1
Power
9
kilowatt
kW
3
1000
megawatt
MW
6
10
6
Rotation
11
rotation per minute
RPM
0
1
Torque
16
newtonmeter
Nm
0
1
kilonewtonmeter
kNm
3
1000
Temperature
17
degree Celsius
°C
0
1
millivolt
mV
-3
0.001
Voltage
21
volt
V
0
1
kilovolt
kV
3
1000
milliampere
mA
-3
0.001
Current
22
ampere
A
0
1
kiloampere
kA
3
1000
milliohm
mOhm
-3
0.001
Resistance
23
ohm
Ohm
0
1
kiloohm
kOhm
3
1000
Ratio
24
per cent
%
0
1
Relative change
27
per cent
%
0
1
hertz
Hz
0
1
Frequency
28
kilohertz
kHz
3
1000
megahertz
MHz
6
10
6
gigahertz
GHz
9
10
9
PNU
Characteristics
Subindex 1
Size of elements
Subindex 2
Size attributes
Subindex 4
Lower limit
Subindex 7
Upper limit
Subindex 8
Extended characteristics
Subindex 10