Position Control Under Vector Control; About Position Control - Mitsubishi Electric 800 Series Instruction Manual

Position control under vector control

5.5
Position control under vector control
Purpose
To perform Simple position
control by setting parameters
To perform position control by
pulse input to the inverter
To adjust the gear ratio of the
motor and machine
To improve the precision of the
position control
To monitor pulses
5.5.1

About position control

• In position control, speed commands, which are calculated to eliminate the difference between the command pulse
(parameter setting) and the estimated feedback pulse, are output to rotate the motor.
• This inverter can perform simple positioning by contact input or position control by simple pulse input to the inverter.
Control block diagram
Point table
Position
Pr.4 to 6, Pr.24 to Pr.27,
Pr.232 to Pr.239
RH
Pr.465 to Pr.494
Pr.1222 to Pr.1281
RM
RL
REX
distance
STF
STR
Command pulse
Command pulse selection
(FR-A8AL)
Pr.428
PGP, PP
Command pulse
(FR-A8AL)
PGN, NP
Command pulse selection
Command pulse
Pr.428
JOG
Pulse train sign
NP
204
PARAMETERS
To give parameter position
command
Simple pulse train position
command
Electronic gear settings
Setting the position
adjustment parameters
Position control gain
adjustment
Pulse monitor selection
Cumulative pulse monitor
Speed Acceleration/deceleration time Dwell time Auxiliary function
Position command
source selection
Pr.419
0, 10, 100, 110
Multi-speed,
Travel
communication
Electronic
gear
1
Pr.420
Pr.421
acceleration/deceleration
2
Parameter to set
P.B000,
P.B020 to P.B050,
P.B101,
P.B120 to P.B188,
P.B190 to P.B195
P.B000,
P.B009 to P.B010
P.B001, P.B002
and P.B005
P.B007, P.B008,
P.B192 to P.B195
P.B003, P.B004,
P.B006, P.B012,
P.B013, P.G220,
P.G224, P.C114
P.B011
P.M610 to P.M613
Vector Vector Vector
Position feed
forward
command filter Position feed
Pr.425
Model position
control gain
Pr.424
+
-
Position command
time constant
Pr.877
0,1 2
+
-
Pr.419,
Pr.464 to Pr.494,
Pr.1221 to Pr.1290,
Pr.1292, Pr.1293
Pr.419, Pr.428,
Pr.429
Pr.420, Pr.421 and
Pr.424
Pr.426, Pr.427,
Pr.1294 to Pr.1297
Pr.422, Pr.423,
Pr.425, Pr.446,
Pr.828, Pr.877,
Pr.880, Pr.1298
Pr.430
Pr.635 to Pr.638
forward gain
Pr.423
Model speed
control gain
Pr.446
Pr.828
+
-
integral integral
Speed feed
forward gain
0,1 2
Position
loop gain
Pr.422
+
Deviation
+
counter
-
Speed control
Pr.429
Differentiation
Clear signal
selection
Position feedback
Refer to
page
207
225
232
234
236
227
227
J
Torque coefficient
0
1 2 0
+
M
+
Torque
control
Encoder