Danfoss FC 300 Design Manual page 237

FC 300 Design Guide
11.4.11 Data Types Supported by AutomationDrive FC 300
Unsigned means that there is no operational sign in the telegram.
11.4.12 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.
11.4.13 Process Words (PCD)
The block of process words is divided into two blocks of 16 bits, which always occur in the defined sequence.
Control telegram (master⇒slave Control word)
Control telegram (slave ⇒master) Status word
has a conversion factor of 0.1.
PCD 1
MG.33.BC.02 - VLT ® is a registered Danfoss trademark
11 RS-485 Installation and Set-up
Data types Description
3 Integer 16
4 Integer 32
5 Unsigned 8
6 Unsigned 16
7 Unsigned 32
9 Text string
10 Byte string
13 Time difference
33 Reserved
35 Bit sequence
Conversion table
Conversion index Conversion factor
74 0.1
2 100
1 10
0 1
-1 0.1
-2 0.01
-3 0.001
-4 0.0001
-5 0.00001
Present outp. frequency
PCD 2
Reference-value
237
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