Examples - Danfoss FC 300 Design Manual

FC 300 Design Guide
9.4.12. Conversion
The various attributes of each parameter are
displayed in the section entitled "Factory Set-
tings." Parameter values are transferred as
whole numbers only. Conversion factors are
therefore used to transfer decimals.
Par. 4-12
version factor of 0.1.
To preset the minimum frequency to 10 Hz,
transfer the value 100. A conversion factor of
0.1 means that the value transferred is multi-
plied 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
Write the data in EEPROM.
PKE = E19E Hex - Write single word in par.
Motor Speed High Limit [Hz]
4-14
IND = 0000 Hex
PWEHIGH = 0000 Hex
PWELOW = 03E8 Hex - Data value 1000, cor-
responding 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 hexa-
decimal.
The response from the slave to the master will
be:
Motor Speed, Low Limit has a con-
Motor Speed High Limit [Hz]
MG.33.B9.22 - VLT ® is a registered Danfoss trademark.
9. RS-485 Installation and Set-up
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
PCD 2
Reference value
Present output frequency
to 100 Hz.
The telegram will look like this:
9
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