Chapter 9 Inverter Functions
9-14-3
Operation procedure for simple position control function
1 Pre-Setting of Parameters
(1) Perform wiring of the encoder and set related parameters. For details, refer to "9.5.8 Using
Encoder Feedback".
(2) To enable the simple position control function, set "Pulse input, target function selection
[P003]" to "Speed feedback (01)" and "Simple positioning selection [P012]" to "Simple
positioning enabled (02)".
(3) To prevent the current position data from being cleared when a reset is input for trip
release, etc., set "Reset mode selection [C102]" to "Only enable in trip status (Trip release
at turn-ON, clear only trip memory) (03)".
(4) Set "DC braking selection [A051]" to "Disable (00)" (in the simple position control, even if
[A051] is "Disable (00)", the DC braking operates automatically when the positioning is
completed). Also, set "DC braking force [A054]" so that the required braking force is
obtained when the positioning is completed.
(5) When "RUN command input source selection [A002]" is "Keypad (RUN-key) (02)", the DC
braking does not work when stopped after the completion of positioning. To operate the
DC braking when stopped after the completion of positioning, set [A002] to "Control
terminal (01)", and assign either "Forward rotation [FW]" or "Reverse rotation [RV]" to the
input terminal. The rotation method for the simple position control is the forward rotation
if (target position - current position) is a positive value, and the reverse rotation if (target
position - current position) is a negative value. Therefore, the "Forward rotation [FW]" input
and the "Reverse rotation [RV]" input have no meaning in terms of rotation direction, but
they work only as an input signal for starting or stopping operation.
(6) Set "Position displacement at creep speed [P014]" and "Creep speed [P015]" according to
the operation pattern. Set the creep speed movement amount, with one motor rotation
treated as 100%.
Also, set "Lower frequency limit, 1st-motor [A062]" to zero. If it is not set to zero, the value
specified will be the lower limit of [P015].
(7) Set a pulse multiplier of 4 (the number of pulses for phase A single pulse cycle multiplied
by four) for "Positioning completed range [P017]". When the current position falls within
the target position ± [P017] range, the "Positioning completed [POK] (23)" output is turned
on. Assign [POK] to the output terminal as needed.
(8) Set the target position, speed command (frequency command), acceleration time, and
deceleration time for the positioning operation. Set the target position to "Position set-
point 0 [P060]" to "Position set-point 7 [P067]", and select a value by combining the
position set-point selections 1 to 3 ([CP1] to [CP3]) of the input terminal function. The
speed command (frequency command) and the acceleration/deceleration time are
specified according to the frequency command and the acceleration/deceleration time
setting from each command selection source at the time of RUN command input.
(9) If "Position control mode selection [P075]" is set to "Limit (00)", the specified position
control range is enabled. Set the position control range to "Position control range (forward)
[P072]" and "Position control range (reverse) [P073]". If the current position goes outside
the specified position control range, the inverter trips due to the "Position control range
error [E83]". If [P075] is set to "No Limit (01)", the specified position control range is
disabled and the turntable operation function is enabled. For details, refer to "Turntable
Operation Function" in this section.
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