Danfoss VLT AutomationDrive FC 300 Design Manual page 242

FC 300 Design Guide
Example - Write a parameter value:
Change par. 4-14 Motor Speed High Limit
to 100 Hz. After a mains failure, recall the
value to write it in EEPROM.
PKE = E19E Hex - Write for par. 4-14
Motor Speed High Limit
IND = 0000 Hex
PWE = 0000 Hex
HIGH
PWE = 03E8 Hex - Data value 1000,
LOW
corresponding to 100 Hz, see conversion.
The response from the slave to the master will be:
Example - Reading a parameter value:
Requires a value in par. 3-41 Ramp 1 Up Time.
The master sends the following request:
PKE = 1155 Hex - read par. 3-41 Ramp 1 Up Time
IND = 0000 Hex
PWE = 0000 Hex
HIGH
PWE = 0000 Hex
LOW
If the value in par. 3-41 Ramp 1 Up Time is 10 s,
the response from the slave to the master is:
Conversion:
The various attributes of each parameter are
displayed in section Factory Settings. A parameter
value is only transferred as a whole number. Thus,
use a conversion factor to transfer decimals.
Example:
Par. 4-12 Motor Speed, Low Limit has a conversion
factor of 0.1. If you wish 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.
default setting ( )
*
242
How to Programme
display text [ ] value for use in communication via serial communication port
MG.33.B4.02 - VLT is a registered Danfoss trademark
Conversion table
Conversion index
74
2
1
0
-1
-2
-3
-4
-5
Conversion factor
0.1
100
10
1
0.1
0.01
0.001
0.0001
0.00001