Hitachi SJ-FB - Manual (Page 25)

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Chapter 7 FUNCTIONS
7.1.2 Data setting
Data setting related to speed control
Setting item Function code Setting Range, Setting Contents
Orientation speed setting (Note 1) P015 0.00 ∼99.99 / 100.0∼120.0 (Hz)
Orientation direction setting (Note 2) P016 0:Forward / 1:Reverse
(Note 1) : In order to stop the motor for setting position. (Motor takes 2 rotation to stop setting
position)Don’t set high frequency to the orientation speed setting. Otherwise it will be
over-voltage protection trip.
(Note 2) : Turn direction of the motor while orientation is done based on the setting of P016.
Data setting related to position control
Setting item
Function
code
Setting range, setting contents
Orientation stop position(Note 3) P014 0. ∼4095.
Completion range setting P017
0 ∼9999. / 1000 (10,000) (pulses)
(Setting four times fairly of the encoder pulses)
Completion delay time (Note 4) P018 0.00 ∼9.99
Position loop gain(Note 5) P023 0.00 ∼99.99 / 100.0 (rad/s)
(Note 3) : The orientation stop position is to be set as 4096 of division (0 ∼4095) per 1 turn toward
forward from the original point. (It is 4096 division irrespective of the pulse number
of the encoder.) The original point is where the pulse has input to EZP-EZN.
Stoppage goal position is like shown in Figure 7-2 irrespective of the turn direction.
(Note 4) : It depends on what type of main body combines with the SJ-FB, the setting value
conversion is different. Please refer to the (Note 3) of the “5.3 Items regarding the
feed back board of the inverter main body“.
(Note 5) : To improve the positioning accuracy. Increase position loop gain (G).
When the motor is unstable. Decrease position loop gain.
Z pulse Position
0
1024
2048
3072
(Reference point)
Motor Shaft viewed from
the load side
Figure 7-2 Concept of Orientation setting Position