7 Before Starting Positioning Operation
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FX
3U
-20SSC-H Positioning Block User's Manual
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Int
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Sy
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Exam
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C
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Ins
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Wi
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Me
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Befor
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M
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Posit
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Table O
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7.9 Other functions
7.9.7
Follow-up function
With the follow-up function, the motor rpm is monitored when the servo is OFF, and the motor rpm is reflected
in the current value.
With this function, even if the servomotor rotates while the servo is OFF, the servomotor always starts
positioning at the next servo-ON, ignoring the drop pulse.
The 20SSC-H always executes the follow-up process during servo OFF. However, the current value may not
be correctly reflected during motor deceleration after a forced stop or alarm occurrence.
Caution
Do not perform the release of a forced stop or release of an alarm during the deceleration of the motor caused
by a forced stop or alarm occurrence. A servo motor carries out the amount of rotation equal to the dropped
pulses, and there is a possibility that the machine will be damaged. Only perform the release of a forced stop
or release of an alarm after confirming that the motor has stopped sufficiently.
7.9.8
Simultaneous start function
Operation in the X- and Y-axes start simultaneously with this function.
→
For the parameters, control data and monitor data, refer to Chapter 11
1.
Applicable positioning operations
2. Operation
1) Enter the X-axis and Y-axis operation patterns.
2) Turn ON the X-axis simultaneous start flag.
3) Turn ON the X-axis start command.
In JOG operation, turn ON the X-axis forward/reverse rotation jog command.
4) X-axis and Y-axis operation begins simultaneously.
POINT
While the "simultaneous START" flag remains ON, the START command and forward rotation jog/reverse
rotation jog for the Y-axis are ignored.
• Operations applicable to the simultaneous start
function
• Operations inapplicable to the simultaneous
start function
- JOG operation
- Mechanical zero return
- 1-speed positioning operation
- Interrupt 1-speed constant quantity feed
- 2-speed positioning operation
- Interrupt 2-speed constant quantity feed
- Interrupt stop
- Table operation (individual)
- Reciprocal movement instruction
(Ver.1.10 or later)
- Manual pulse generator operation
- Variable speed operation
- Multi-speed operation
- Linear interpolation
- Linear interpolation (interrupt stop)
BFM Number
Data type
X-axis
Y-axis
Operation pattern selection
BFM #520
BFM #620
Control data
Forward rotation JOG
Operation command 1 BFM #518 b4
BFM #618 b4
Control data
Reverse rotation JOG
Operation command 1 BFM #518 b5
BFM #618 b5
Control data
START command
Operation command 1 BFM #518 b9
BFM #618 b9
Control data
Simultaneous START flag
Operation command 1 BFM #518 b10
Control data