Hitachi SJ Series, User Manual

Page: 378 / 786

12-17-17
Chapter 12 Inverter Functions
12.17.7 Performing the Pulse Train Position
Control
• How to input the pulse train to the feedback option
to perform the position control.
• The pulse train can be input to the SA/SB terminal
of the feedback option (P1-FB) to perform the
position control.
• In the position control mode, the
acceleration/deceleration time is disabled.
(The inverter output is performed following the
speed command. (refer to the following right.))
The larger the position loop back gain is, the
shorter the acceleration/deceleration time
becomes.
• Start the input of the pulse train by assigning the
073[STAT] pulse train position command input
permission to the input terminal and turning on the
terminal.
Setting Items for the Pulse Train Position Control
• Using this function requires the following settings.
- [AA121] Control method 10: Vector control with
sensor
- [AA123] Vector control mode
01: Pulse train position control mode
- [ob-10] Pulse train input SA/SB (P1-FB) mode
selection
01: Pulse train position command
The speed command in the pulse train position
control mode is calculated by the following formula.
• See also "12.9.17 Use Encoder".
Item Parameter Data Description
Control Method [AA121] 10 Vector control with sensor
Vector control mode
selection
[AA123] 01
Pulse train position control mode
Pulse train input SA/SB
(P1-FB) detection target
selection
[ob-10]
00 Pulse train frequency command
01
Pulse train position command
Pulse train input SA/SB
(P1-FB) mode selection
[ob-11]
00
MD0: 90° phase difference pulse
train
01
MD1: Forward/reverse rotation
c pulse train
02
MD2: Forward rotation pulse train +
reverse rotation pulse train
Electronic gear
installation position
selection
[AE-01]
00 FB: Feedback side
01
REF: Command side
Electronic gear ratio
numerator
[AE-02] 1~9999
Numerator of th electronic gear
Electronic gear ratio
denominator
[AE-03] 1~9999
Denominator of th electronic gear
Positioning completion
range setting
[AE-04] 0~10000
Set the value equivalent to encoder
4 multiplication
Positioning completion
delay time setting
[AE-05] 0.00~9.99(s)
Set the time from the positioning
completion to the output of the
[POK] signal.
Position feed forward [AE-06] 0.00~655.35 Position feed forward gain.
Position loop gain [AE-07] 0.00~100.00 Position loop gain.
Position bias amount [AE-08] -2048~2048 Set the bias value of the position.
Q
A
!
Speed Kv
4 ENC
⊿
P
2
P
P: Number of motor poles
Kv: Position loop gain
ENC: Number of encoder
pulses
⊿
P: Position deviation