Kinco CD420, User Manual

Page: 54 / 108

54
Mathematical equation for dead zone processing:
Mathematical equation for integrated processing (offset and dead zone)
Table 7-10 Analog signal variables
Variable Meaning Range
int ernal
U
Internal data corresponding
to the external voltage
-10 V
– 10 V corresponds to
-2048
– 2047 when no offset or
dead zone voltage exists
t ex ernal
U
External input voltage -10V
– 10V
shift
U
Offset voltage 0
– 10 V corresponds to
log_ Ana Offset
0~8191
dead
U
Dead zone voltage 0
– 10 V corresponds to
log_ Ana Dead
0~8191
The obtained analog signal
int ernal
U
obtains
filter
U
after passing through a first-order low-pass filter, and is
applied by the internal programs again.
In the analog
– speed mode, if the analog signal
filter
U
that passes through the filter is multiplied by a factor,
this signal will be regarded as the internal target speed
demand
V
.
Mathematical formula:
Formula for
rpm
V
conversion:
Note: The resolution unit of an encoder is inc/r.
7.2.4 Calculation Procedure for Analog
– speed Mode
Table 7-11 Calculation procedure for analog
– speed mode
Procedure Method Formula
Step 1
Calculate
filter
U
according
to the offset voltage and dead
2047
10 10
filter
shift dead
U
v v U U

 








 
 
   
external dead
external dead
dead external ernal
dead external dead ernal
U U
U U
U U U
U U U U
  
     
int
int
0








 
  
  
    
shift external dead
shift external dead
dead shift external ernal
dead shift external dead ernal
U U U
U U U
U U U U
U U U U U
  
       
int
int
0
2047 2048 *
   
filter filter demand
U U Factor V
 
demand
V