216
Motor brake and stop operation
(6) Orientation operation (under V/F control, advanced magnetic flux vector control)
Orientation during running
1) When the orientation command (X22) is input, the motor speed decreases to the orientation speed set in
Pr. 351
Orientation speed
. (
Pr. 351
initial value: 2Hz)
2) After the speed reaches the orientation speed, the speed decreases to the creep speed set in
Pr. 352 Creep speed
as soon as the current position pulse reaches the creep switchover position set in
Pr. 353 Creep switchover position
(
Pr. 352
initial value:0.5Hz,
Pr. 353
initial value: 511)
3) Moreover, as soon as the current position pulse reaches the set position loop switchover position in
Pr. 354 Position
loop switchover position
, control is changed to position loop. (
Pr. 354
initial value: 96)
4) After switching to position loop, the inverter decelerates and stops with DC injection brake as soon as the current
position pulse has rached the DC injection brake start position set in
Pr. 355 DC injection brake start position
. (
Pr. 355
initial value: 5)
5) When the position pulse has stopped within the in-position zone set in
Pr. 357 Orientation in-position zone
, the
orientation completion signal (ORA) is output after the comletion signal output delay time set in
Pr. 363 Completion
signal output delay time
has elapsed. If the motor does not stop within the in-position zone due to external force, etc.,
the orientation completion signal is turned off after the time set in
Pr. 363 Completion signal output delay time
has
elapsed. (
Pr. 357
initial value: 5)
6) If the orientation is not completed continusouly for the time set in
Pr. 365 Orientation limit
after passing the creep
switchover position, the orientation fault signal (ORM) is output.
7) When the motor stops before the position pulse reaching the in-position zone due to external force after orientation
start and orientation completion signal (ORA) is not output, orientation fault signal (ORM) is output after the time set
in encoder stop check time set in
Pr. 364 Encoder stop check time
has elapsed. Moreover, the orientation complete
signal (ORA) is turned off after the time set in
Pr. 363 Completion signal output delay time
has elapsed if the position
pulse is outside the in-position zone due to external force, etc. after outputting the orientation complete signal
(ORA), and the orientation fault signal (ORM) is output if the orientation has not completed within the time set in
Pr.
364 Encoder stop check time
.
8) When the start signal (STF or STR) is turned off with the orientation command on after outputting the orientation
completion signal (ORA) and orientation fault signal (ORM), the orientation complete signal (ORM) or orientation
fault signal (ORM) is output again after recheck time set in
Pr. 366 Recheck time
has elapsed.
9) The orientation completion signal (ORA) and orientation fault signal (ORM) are not output when the orientation
command is off.
• Action time chart
REMARKS
• When the orientation command is off with the start signal on, the speed accelerates to the command speed.
• If the motor shaft hants, set a larger value in
Pr. 354 Position loop switchover position
or a smaller value in
Pr. 352 Creep speed
to
prevent it.
Orientation stop position command
DC injection brake
Position loop switchover position
Creep switchover position
Orientation
speed
Origin
Creep
speed
Position loop
Main spindle speed (encoder)
Pr. 351
Pr. 352
Start signal (STF, STR)
Orientation command (X22)
Current position signal
Origin signal
Orientation speed (set with
Pr. 351
)
Creep speed (set with
Pr. 352
)
Creep switchover position
(set with
Pr. 353
)
Position loop switchover
(set with
Pr. 354
)
DC injection
brake start
position
(set with
Pr. 355
)
Stop position command
0
DC injection brake
OFF
OFF
ON
Orientation completion signal (ORA)
OFF
OFF
ON
OFF
OFF
Time
ON
OFF
ON
1)
2)
3) 4)
5)
Summary of Contents for FR-A740-00023-EC
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