Pulse Counting - Delta ASD-A2-0121 Series User Manual

Chapter 12 Absolute System

12.3.2 Pulse Counting

When the motor is running in clockwise direction, the counting number of turns will be minus where
the counter clockwise rotating is plus. The number range for turns is from -32768 to 32767. The
fault code, AL062, will appear when exceeding this counting range and it can be cleared by
resetting the coordinate system. If parameter P2-70 has been set to ignore the over range alarming,
the AL062 is disabled even exceeding the counting range. For the counter clockwise counting, the
sequence of the number is ...32767, -32768, -32767, -32766 .... and the clockwise will have a
sequence like ...-32768, 23767, 32766 ....
In addition, there are 1280000 pulses (0 ~ 1279999) in one rotation. Please pay attention on its
direction. The communication or digital inputs/digital outputs can be used to read it.
Pulse number for the distance = m (turn) × 1280000 + pulse number within one turn (0 ~
1279999)
The conversion between Pulse and PUU:
When the rotating direction is CCW defined in P1-01.
PUU number = pulse number ×
When the rotating direction is CW defined in P1-01.
PUU number = (-1) × pulse number ×
Turn, P0-51
(1280000-1)
Pulse
0
( 1 45 )

P
+ (P6-01)
( 1 44 )

P
( 1  45
P
( 1 44

P
m=-2
0~1279999 0~1279999 0~1279999 0~1279999 0~1279999 0~1279999
CW
Figure 12.1 Pulse counting in absolute coordinate system
)
+ (P6-01)
)
Pulse within one turn
P0-52
m=-1 m=0 m=1
ORG
CCW
ASDA-A2
12-17