Examples - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide
9.4.11. Data Types Supported by FC 300
Unsigned means that there is no operational sign in the telegram.
9.4.12. 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
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.
9.4.13. Process Words (PCD)
The block of process words is divided into two blocks of 16 bits, which always occur in the defined sequence.
PCD 1
Control telegram (master⇒slave Control word)
Control telegram (slave ⇒master) Status word

9.5. Examples

9.5.1. Writing a parameter value
Change par. 4-14 Motor Speed High Limit [Hz]
Write the data in EEPROM.
PKE = E19E Hex - Write single word in par. 4-14
[Hz]
IND = 0000 Hex
PWEHIGH = 0000 Hex
PWELOW = 03E8 Hex - Data value 1000, corresponding to 100 Hz, see
Conversion.
Note: Parameter 4-14 is a single word, and the parameter command for
write in EEPROM is "E". Parameter number 414 is 19E in hexadecimal.
has a conversion factor of 0.1.
to 100 Hz.
Motor Speed High Limit
MG.33.BA.02 - VLT ® is a registered Danfoss trademark
9. RS-485 Installation and Set-up
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
PCD 2
Reference-value
Present outp. frequency
The telegram will look like this:
The response from the slave to the master will be:
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
171
9