Danfoss VLT AQUA Instruction page 174

7 RS-485 Installation and Set-up
7.4.11 Data Types Supported by FC 300
Unsigned means that there is no operational sign in the message.
7
7.4.12 Conversion
The various attributes of each parameter are displayed in the section
Factory Settings. Parameter values are transferred as whole numbers
only. Conversion factors are therefore used to transfer decimals.
Motor Speed Low Limit [Hz]
Par. 4-12
To preset the minimum frequency to 10 Hz, transfer the value 100. A
conversion factor of 0.1 means that the value transferred is multiplied by
0.1. The value 100 is thus perceived as 10.0.
7.4.13 Process Words (PCD)
The block of process words is divided into two blocks of 16 bits, which always occur in the defined sequence.
Control message (master⇒slave control word)
Control message (slave ⇒master) Status word
7-10
has a conversion factor of 0.1.
PCD 1
MG.20.T1.22 - VLT
VLT AQUA Low Harmonic Drive Instruction
Data types
3
4
5
6
7
9
10
13
33
35
Conversion table
Conversion index
74
2
1
0
-1
-2
-3
-4
-5
Present output frequency
®
is a registered Danfoss trademark
Description
Integer 16
Integer 32
Unsigned 8
Unsigned 16
Unsigned 32
Text string
Byte string
Time difference
Reserved
Bit sequence
Conversion factor
0.1
100
10
1
0.1
0.01
0.001
0.0001
0.00001
PCD 2
Reference value
Manual