Mitsubishi Electric M800VW Series Programming Manual page 658

M800V/M80V Series PLC Programming Manual (2/2)
14 PLC Help Function
14.12 Chopping
Procedures for setting the chopping control data
 Set the chopping control data to R register.
 Turn the chopping parameter valid signal ON.
Chopping control data is written into the current parameter area inside the NC at the rising edge of the chopping parameter
valid signal and is reflected to the chopping operation.
Turn the chopping parameter valid signal OFF after confirming that the chopping start ready completion signal in the control
status (Rn) within the chopping control data is turned ON.
Setting the chopping control data during chopping
Chopping control data can be set during chopping.
When the chopping parameter valid signal is turned ON, the chopping axis decelerates to stop once at the upper or bottom
dead center point to be changed. As soon as decelerating to stop, chopping operation is carried out with the changed
chopping control data.
[The upper and bottom dead center points are switched while moving from the upper dead center point to the bottom
dead center point.]
New upper dead center
point
Upper dead center point
before change
Control data change
Bottom dead center point
before change
New bottom dead
center point
[The upper and bottom dead center points are switched while moving from the bottom dead center point to the upper
dead center point.]
New upper dead center
point
Upper dead center point
before change
Control data change
Bottom dead center point
before change
New bottom dead
center point
Chopping control data can be changed at any time in the chopping start state. Checking the NC side status or considering the
timing is not necessary.
Chopping axis cannot be changed during chopping operation.
Note
(1) When the chopping parameter valid signal is turned ON, the chopping axis decelerates to stop once even if the chopping
control data has not been changed, and which may result in longer cycle time.
Upper dead center point before
change
Control data change
Bottom dead center point before
change
New upper dead center point
New bottom dead center point
Decelerates to stop
Decelerates to stop
Upper dead center point before
change
Control data change
Bottom dead center point before
change
New upper dead center point
New bottom dead center point
637
Decelerates
to stop
Decelerates to stop
IB-1501668-B