Kinco CD430 - Calculation Procedure for Analog - Speed Mode

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
internal
U
Internal data corresponding
to the external voltage
-10 V – 10 V corresponds to
-2048 – 2047 when no offset or
dead zone voltage exists
tex 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
internal
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














externaldead
externaldead
deadexternalernal
deadexternaldeadernal
UU
UU
UUU
UUUU


int
int
0












shiftexternaldead
shiftexternaldead
deadshiftexternalernal
deadshiftexternaldeadernal
UUU
UUU
UUUU
UUUUU


int
int
0
20472048* 
filterfilterdemand
UUFactorV 
demand
V