Omron CP1L - 12-2007, Operation Manual

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Inverter Positioning
Section 5-3
Inverter Positioning with the CP1L
With the CP1L’s inverter positioning function, feedback is constantly read for
the positioning data while controlling the position.
Note (1) The CP1L’s inverter positioning function is designed to increase position-
ing speed and stopping precision by reading position information and us-
ing a feedback loop with an error counter to switch speeds. It does not
increase the response, stopping precision, or speed change rate of the
inverter and motor. These are characteristics of the inverter and motor.
Refer to user documentation on your inverter and motor for details.
(2) The corresponding pulse output number (0 or 1) cannot be used for the
PULSE WITH VARIABLE DUTY FACTOR instruction (PWM) if inverter
positioning 0 or 1 is used. The high-speed counter of the same number
(0 or 1) is used to input the feedback pulse.
CP1L
Position feedback
Speed command
Inverter
Power
supply
frequency
Inductive motor
Encoder
Feedback pulses
There is no positioning error because the present position and position error
are constantly monitored and corrected.
Frequency
Low-speed operation is not required to prevent
positioning error. Control is simplified because the
low-speed position does not need to be calculated.
Time
Time
Position
Actual/Settings
Command output
Settings/Actual
Positioning is faster because low-speed
operation is not used.