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11 SUB FUNCTIONS
11.7 Restart function
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[2] Precautions for control
(1) At the set speed of 1 (pulse/s), the set acceleration/deceleration time is
ignored.
(2) In the acceleration/deceleration pattern where the movement amount is
small relative to the acceleration/deceleration time and a constant-speed
part does not exist, operation is not performed at the set
acceleration/deceleration time. In such a case, review the setting details.
(3) If operation is performed with 0 set as the bias speed at start in the control
method of "1-axis linear control (ABS)" or "1-axis linear control (INC)"
positioning control, an error "Movement amount shortage at 0 bias speed"
(error code: 514) may occur due to shortage of the movement amount.
Perform either of the following operations (a), (b) as the corrective action at
error occurrence.
(a) Set 1 (pulse/s) or more to " Pr. 6 bias speed at start".
(b) If the movement amount is 32 (pulse) or less, set the value equal to or
less than the initial value (1000ms) to " Da. 3 ACC/DEC time" and
" Da. 4 DEC/STOP time".
When the axis is stopped by the axis stop signal during operation, position control is
resumed from the stop position to the end of the positioning data by " Cd. 4 Restart
request".
[Position control that can be restored]
The restart function can be used only when the axis is stopped during operation under
position control or speed control of speed-position switching control.
[Position control that cannot be restored]
When the axis has been stopped during operation under position control of speed-
position switching control, do not restart it.
If the axis is restarted, it will not be stopped at the end point of the positioning data.
Refer to [2]-(5) in this section for operation details.
The following will be described for the "restart function".
[1] Control details
[2] Precautions for control
MELSEC-Q
11 - 15
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