9 Positioning Control
9.7 Variable Speed Operation
170
FX
3U
-20SSC-H Positioning Block User's Manual
Note
• When setting the operation speed to 0, the work piece decelerates to stop, but the variable speed
operation does not end.
The operation pattern should be changed to another pattern when terminating the variable speed
operation.
• At STOP command ON, the work piece decelerates to stop.
Note that the operation restarts at STOP command OFF.
• Even if the current address overflows, no error occurs.
• The current address may overflow during unlimited length feed operation.
No error occurs even if the current address overflows, but note that the current address changes "from the
maximum value to the minimum value" or "from the minimum value to the maximum value."
2. Operation speed
The actual operation speed is "operation speed 1 x override setting."
→
For the override function, refer to Subsection 7.6.1
3. Rotation Direction
The operation direction is decided by the sign of operation speed 1.
+: Operates in the direction which increases the current value.(Decelerates to stop when the value is 0.)
-:
Operates in the direction which decreases the current value.
If the sign of the operation speed value changes, the reverse operation starts after decelerating to stop.
Caution
An abrupt change in the rotation direction may cause damage to the machine.
It may also cause an error through motor overload.
To change the rotation direction, set operation speed 1 value to 0, and wait for the motor to stop completely
after decelerating to stop.
If operation speed 1 value changes from positive to negative (e.g. 100
→
-100), the work piece decelerates to
stop, and the 20SSC-H starts the reverse operation immediately.
BFM Number
Data type
X-axis
Y-axis
Ring counter setting
(Ver.1.10 or later)
Operation parameter 2
BFM #14002 b3
BFM #14202 b3
Positioning parameters
Pulse rate
BFM #14005,#14004 BFM #14205,#14204 Positioning parameters
Feed rate
BFM #14007,#14006 BFM #14207,#14206 Positioning parameters
Maximum speed
BFM #14009,#14008 BFM #14209,#14208 Positioning parameters
Acceleration time
BFM #14018
BFM #14218
Positioning parameters
Deceleration time
BFM #14020
BFM #14220
Positioning parameters
Servo end evaluation time
BFM #14032
BFM #14232
Positioning parameters
Ring counter upper limit value (Ver. 1.10 or later)
BFM #14101,#14100 BFM #14301,#14300 Positioning parameters
Positioning completion signal output waiting time
(Ver.1.20 or later)
BFM #14106
BFM #14306
Positioning parameters
Acceleration time 2 (Ver.1.30 or later)
BFM #14108
BFM #14308
Positioning parameters
Deceleration time 2 (Ver.1.30 or later)
BFM #14110
BFM #14310
Positioning parameters
