419
1000=100.0% 700=70.0%
8-1-1 Assign the positioning Units
The VS series PLC’s positioning control functions are through the high-speed pulse output points, to operate the motor
positioning control drives. Thus, the basic unit of operating speed is the output pulse frequency (Hz) and the position is
the number of pulses (PLS).
Nonetheless, using the machine unit is more suitable for the positioning control of the real applications. Therefore, the
VS PLC provides the unit setting function, that unit conversion is performed by the system. By way of the function, it
allows user to proceed the positioning control by using the most appropriate unit.
Positioning unit in the system:
According to actual control needs, select one from the Motor (pulse) system, Machine system or Combined system.
The Motor system is defaulted.
Type
Description
Motor system
Machine system
Combined system
The units of position and speed at the control are based on the number of pulses
The units of position and speed at the control are based on metric/inch lengths or angles
The units of speed at the control is based on the number of pulses per second;
The units of position at the control is based on metric/inch length or angle
Unit of the speed:
According to the unit on the control system to select an appropriate speed unit. The frequency Hz is defaulted.
This speed unit is relate to the maximum speed, bias speed, jog speed, home position return speed, home position
return creep speed, operating speed and current speed value of the positional control.
Unit of the position:
According to the unit on the control system to select an appropriate position unit. The number of pulses (PLS) is
defaulted.
This position unit is relate to the home position, the target position and the current position value of the positional
control.
Pulse Per Revolution of motor and Distance Per Revolution of motor:
When the Machine system or Combined system is selected as the unit of the control type, it is necessary to set the
contents of the “Pulse Per Revolution of motor” and “Distance Per Revolution of motor”.
Thus, the positioning control system can proceed the unit conversion and then send correct pulse strings.
The default value of the “Pulse Per Revolution of motor” is 2000 PLS.
The default value of the “Distance Per Revolution of motor” is 2000 µm.
Multiple ratio of speed:
This is used to change the operating speed when the positioning control is active. The default value is 1,000 (equal to
100.0%).
The jog speed, home position return speed, home position return creep speed and operating speed are affected by
this parameter.
If this parameter value is changed during the positioning control instruction is active, the actual operating speed is
changed accordingly.
The available range of the multiple ratio is from 1 to 30,000, in a unit of 0.1% (that means 0.1% ~ 3000.0%).
Speed
Multiple ratio
of speed
Time
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