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MELSEC-Q
12 CONTROL SUB FUNCTIONS
(2) Block start
At a block start, this function is valid for only the position control whose
operation pattern is "Positioning complete" at the point whose shape has
been set to "End". (Refer to Fig. 12.52.)
The following table indicates the operation of the deceleration start flag in the
case of the following block start data and positioning data.
Block start
data
Da.11
Shape
Da.12
Start data No.
Da.13
Special start
instruction
1st point 1: Continue 1 0: Block start
2nd point 1: Continue 3 0: Block start
3rd point 0: End 4 0: Block start
•
•
Positioning
Data No.
Da.1
Operation pattern
1 01: Continuous positioning control
2 00: Positioning complete
3 00: Positioning complete
4 11: Continuous path control
5 00: Positioning complete
•
•
t
1st point: Continue (1) 3rd point: End (0)2nd point: Continue (1)
Operation
pattern
Continuous path
control (11)
Positioning
data No. 4
Positioning
data No. 5
Positioning complete (00)
Continuous
positioning
control (01)
Positioning
data No. 1
Positioning
data No. 2
Positioning complete (00)
Positioning
data No. 3
Positioning complete (00)
V
Md.48
Deceleration start flag
0 1
Fig. 12.52 Operation of deceleration start flag at block start