Process Words - Danfoss VLT AutomationDrive FC 300 Design Manual

FC 300 Design Guide
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.

Process Words

"
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 telegram (slave=>master)
default setting ( ) display text
*
242
How to Program
PCD 1
Control word
Status word
[ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
Conversion table
Conversion index Conversion factor
74
2
1
0
-1
-2
-3
-4
-5
Reference value
Present outp. frequency
0.1
100
10
1
0.1
0.01
0.001
0.0001
0.00001
PCD 2