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MELSEC-Q
8. DATA SETTING
HELPFUL OPERATION (2)
Perform the following operation when you want to determine the command speed
from the time needed to complete positioning. Use the axis speed calculation
function to calculate the command speed from the travel distance, acceleration
time, deceleration time, time needed for positioning completion and so on.
1. Open the positioning data edit window of the corresponding axis. (Active status)
2. Click the [Edit]
[Speed of axis setting] menu.
3. Set the Rating, Feedback, Start position, End position, Operation interval and
Data No. in the Axis speed calculation dialog box, and choose ACC interval and
DEC interval.
4. Click the "Calculation" button to show the operation result in the Confirmation
dialog box.
5. Click "OK" in the Confirmation dialog box to change the command speed to that
of the operation result.
[Axis speed calculation dialog box]
[Confirmation dialog box]
• Axis speed calculation is to be made for the control method of 1-axis linear control
(ABS).
• If the axis speed calculated exceeds the speed limit value, setting it to the
positioning data will result in an error.
• You cannot perform axis speed calculation if the set number of pulses output
exceeds the performance of the QD75.
For QD75P1/P2/P4 (open collector output type)
Number of output pulses ((rated speed)
(number of feedback pulses) / 60) ≤
200kpps
For QD75D1/D2/D4 (differential driver output type)
Number of output pulses ((rated speed)
(number of feedback pulses) / 60) ≤
1Mpps