DVP-15MC Series Motion Controller Operation Manual
11-126
Case 3： During execution of the instruction, Done changes to TRUE when the instruction execution is
completed after Execute changes from TRUE to FALSE. Meanwhile, Busy and Active change to
FALSE and one period later, Done changes to FALSE.
Function
(RecordedPosition) the position that DMC_TouchProbe captures is converted from other value based
on axis parameters. The data sources for conversion are listed in the following table.
The number of pulses that the external encoder port of the motion
controller receives
Mode 2 The number of pulses that the servo motor feeds back to the servo drive
Mode 3
The number of pulses that the pulse, /pulse, sign and /sign input
terminals of CN1 port of the servo drive receive.
Mode 4
The number of pulses that A, /A, B and /B input terminals of CN5 port of
the servo drive receive.
For mode 0, 1 or 2, the range of the data source value is -2147483648~2147483647. When the
data source value exceeds 2147483647, it will become -2147483648. With the changing + or
– sign of the data source value, the + or - sign of the value of RecordedPosition will not change
but the value of RecordedPosition will continue to increase.
For mode 3 or 4, the range of the data source value is -2147483648~2147483647. When the
data source value exceeds 2147483647, it will become -2147483648. The value of
RecordedPosition will change from a positive number to a negative number.
The position captured by the DMC_TouchProbe instruction is calculated according to axis
parameters. For different modes, the data sources are different. “Servo gear ratio setting” and
“Mechanism gear ratio setting” in axis parameters are shown in the following table. When Mode
value of the instruction is equal to 3 (which you can refer to the introduction of mode 3 below), the
number of pulses received at pulse, /pulse, sign and /sign of CN1 is 435 and the position captured
by the instruction is 65.25. The calculation formula: 435×（3×1000）÷（2×10000）=65.25. 10000,
2, 3 and1000 in the formula correspond to 10000, 2, 3, and 1000 in the following table respectively.
For other mode, the calculation method for the position captured by the instruction is the same as
that described above but only the data source is different.
Servo gear ratio setting Mechanism gear ratio setting
Unit Numerator: 128
Output rotations of gear: 3
Unit Denominator: 1
Input rotations of gear: 2
Pulses per rotation:10000
Units per output rotation: 1000
units/rotation
When Mode=0 or 1 in DMC_TouchProbe, the captured position can be calculated according to
the method mentioned above as well. In actual application, the position capture is generally
performed by building an external encoder axis. When the number of pulses received at the
external encoder interface of the motion controller is 638, the position captured by
DMC_TouchProbe is 95.4. The calculation formula: 638×（3×1000）÷（2×10000）=95.4. In the
formula, 1000 is Units per output rotation, 2 is Input rotations of gear; 3 is Output rotations of
gear and 10000 is number of pulses per rotation). When I0 changes from OFF to ON once, the
position capture is performed once.
Wiring Figure
Mode 0 and mode 1
Mode 0: The external signal triggers I point of the motion controller and the position capture is
conducted through the rising edge of the input point specified by TriggerInput. The captured
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