Puu Number - Delta ASDA-B3 Series User Manual

ASDA-B3

10.3.3 PUU number

The PUU number is a 32-bit absolute value with a positive or negative sign. When the motor is
running in the forward direction, the PUU number increases; when it is running in the reverse
direction, the PUU number decreases. The forward direction does not mean the motor is
running clockwise; the direction is defined by P1.001.Z. The range of the cycle number is
-32768 to +32767. AL062 occurs when the number of cycles overflows. If the PUU number
exceeds the range -2147483648 to +2147483647, the position counter overflows and AL289
occurs. Establish the absolute origin coordinates to clear AL062 or AL289. You can determine
whether or not to show AL062 and AL289 when the position overflows with P2.070. When
reaching the maximum PUU number in the forward direction, the value changes from
2147483647 to -2147483648, and then increases from -2147483648 to 2147483647. The value
changes the other way when the motor operates in the reverse direction. See the following
examples:
Example 1:
When P1.044 = 16777216 and P1.045 = 100000, the motor needs 100,000 PUU to run a
cycle. 2147483647 ÷ 100000 ≒ 21474.8, so once the motor runs over 21,474.8
(< 32767) cycles in the forward direction, AL289 occurs.
Example 2:
When P1.044 = 16777216 and P1.045 = 10000, the motor needs 10,000 PUU to run a
cycle. 2147483647 ÷ 10000 ≒ 214748.3, so once the motor runs over 32,767
(< 214748.3) cycles in the forward direction, AL062 occurs.
PUU
2147483647
-2147483648
Overflow
warning
Note: after establishing the absolute origin coordinates, any change to P1.001.Z or E-Gear ratio (P1.044
and P1.045) changes the original setting of the absolute origin coordinates. If the above parameters
are changed, re-establish the absolute origin coordinates.
......
2147483647
......
0
Reverse
direction
AL289
Figure 10.3.3.1 Absolute position for PUU number
Overflow cycle value
-2147483648 to 2147483647
Origin
Absolute System
......
-2147483648
......
Forward
direction
AL289
10
10-15