Hitachi Vector Control with the SJ300 Inverter Application Note page 15

(3-2) Example of positioning under speed control mode (ASR) on SJ300 with SJ-FB
(3-2-1) Example of wiring
SJ300
f*
O
L
P24
ORT
SW
Material
M
Fig 4. Example of wiring
(3-2-2) Example of parameter settings
No. Code
1 A044 Control method
2 P011 ppr of the encoder
3 P012 Control mode
4 P013 Mode of the pulse train input
5 P014 Stop position while orientation
6 P015 Speed while orientation
7 P016 Direction of orientation
8 P017 Orientation completion range
9 A001 Frequency command from;
10 A002 RUN command from;
11 F002 Acceleration time
F003 Deceleration time
Above are the main parameters to get position control. You have to adjust other parameters ([H***] parameters)
to get good performance.
© 2002 Hitachi America, Ltd.
M
EP5 Encoder
EG5
EAP
EAN
Example of 1024ppr line driver type encoder.
EBP
EBN
EZP
EZP
EZN
EZN
SW
Œ • Ž
n (Pulses)
•
Allowable
Required stop
deviation
position
n (pulses)
0
Contents
In case of using external Z pulse
A
Belt is stopped at a certain position after passing a switch "SWZ".
Œ
Material M passes "SWO" point.
("SWO" turns ON which means an inverter is going into an
orientation mode.)
•
Belt speed will be an orientation speed (set in
[P015]), which means it is ready for positioning
Ž
After passing SWZ
and stops at a certain position (set in [P017]).
•
Inverter gives out a "positioning completion signal ; POK" from
an intelligent output terminal.
Set value
05 V2 (closed loop control)
1024 Depends on the encoder
00 ASR (Speed command base on speed)
- No need to care because this is ASR mode
* When you want to stop at n pulses after
catching zero-pulse (after AZP/N is given);
[P014] = 4096 * n / [P011]
<Regardless the ppr of an encoder>
Stop at 300 pulses after Z pulse is given
for example;
[P014] = 4096 * 300 / 1024 = 1200
2.0 In case of 2.0Hz for orientation speed.
00 In case of FW rotation
* Allowable deviation of positioning.
[P017] = n
01 Terminal (O-L input)
02 "RUN" key of the operator
3.0
As short as the system allows.
3.0
15
and wait for a Z pulse.
point, inverter starts counting the pulses
Remarks
* 4
o