Danfoss VLT AutomationDrive FC 300 Series Design Guide

FC 300 Design Guide
How to Program
" Serial Communication Reference
The serial communication reference is transferred
to the adjustable frequency drive as a 16-bit
word. The value is transferred in whole
numbers 0 - ± 32767 (±200 % ).
16384 (4000 Hex) corresponds to 100%.
The serial communica tion reference has the following format: 0-16384 (4000 H ex) 0-100%
(par. 3-02 Minimum Ref. to p a r. 3-03Maximum Ref.).
It is possible to change the direction of rotation via the serial reference. This is done by converting
the binary reference value to 2’ complemen t. See example.
E
xample - Control wo rd and serial communication ref.:
The adjustable frequency drive rece ives a start
command and the reference is set to 50%
(2000 Hex) of the reference range.
Control word = 047F Hex = > Start command.
Reference = 2000 Hex => 50% refe rence.
The adjustable frequency drive rece ives a start
command and the reference is set to -50%
(-2000 Hex) of the reference range.
The reference value is first converted to 1’
complement, and then 1 is added in binary
fashiontoobtain2’compleme
nt:
2000 Hex 0010 0000 0000 0000 0000
1’ complement 1101 1111 1111 1111 1111
+1
2’ complement 1110 0000 0000 0000 0000
Control word = 047F Hex = > Start command.
Reference = E000 Hex => -50% reference.
*
default setting ()display text []value for use in communication via serial c ommunication port
253
MG.33.B
3.22 - VLT is a registered Danfoss trademark

Danfoss VLT AutomationDrive FC 300 Series Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300 Series
Category	DC Drives
Language	English