YASKAWA SVC - Page 382

5.2 Absolute Encoders
5.2.6 Position Management Method for Each Machine Operation Type
5-41
5
Machine-Specic Motion Control
The following flowchart shows the procedure for storing this information to these buffers.
The example of ladder programming on the next page is for the above flowchart. Axis 1 of cir-
cuit number 1 is used here. Change the motion parameter register address if the circuit and/or
axis numbers are different.
Two sets of buffers are needed to save the power OFF encoder position and the power OFF
pulse position because the program may end without setting all four words of the position infor-
mation if the power supply is turned OFF during the high-speed scan.
Important
Is the Toggle Buffer Enabled Flag set to 1?
Set the Toggle Buffer Selection Flag to 0. Set the Toggle Buffer Selection Flag to 1.
YES
NO
YES
NO
YES
NO
Is the Toggle Buffer Selection Flag set to 1?
Position Information Save Request Flag = 0
NO
YES
Position Information Save Request Flag = 1
YES
NO
Has the set origin operation been completed and is
the Position Information Save Request Flag set to 1?
Is the origin setting
completed status ON?
Is operation not ready and
is there a current alarm?
Is this the rst scan after the
high-speed scan started?
End of high-speed scan drawing
Copy the value of the monitor
parameters to buffer 1.
Copy the value of the monitor
parameters to buffer 0.
Start of high-speed scan drawing