Melsec-q, 5 data used for positioning control – MITSUBISHI ELECTRIC Mitsubishi Programmable Logic Controller QD75D User Manual
Page 196
5 - 108
MELSEC-Q
5 DATA USED FOR POSITIONING CONTROL
Storage item
Storage details
Md.41
Special start repetition
counter
•
This area stores the remaining number of repetitions during "repetitions" specific
to special starting.
•
The count is decremented by one (-1) at the loop end.
•
The control comes out of the loop when the count reaches "0".
•
This area stores "0" within an infinite loop.
Md.42
Control system repetition
counter
•
This area stores the remaining number of repetitions during "repetitions" specific
to control system.
•
The count is decremented by one (-1) at the loop end.
•
The control comes out of the loop when the count reaches "0".
•
This area stores "0" within an infinite loop.
Md.43
Start data pointer being
executed
•
This area stores a point No. (1 to 50) attached to the start data currently being
executed.
•
This area stores "0" after completion of a positioning operation.
Md.44
Positioning data No. being
executed
•
This area stores a positioning data No. attached to the positioning data currently
being executed.
Md.45
Block No. being executed
•
When the operation is controlled by "block start data", this area stores a block
number (7000 to 7004) attached to the block currently being executed.
•
At other times, this area stores "0".
Md.46
Last executed positioning
data No.
•
This area stores the positioning data No. attached to the positioning data that was
executed last time.
•
The value is retained until a new positioning operation is executed.
Md.47
Positioning data being
executed
•
The addresses shown to the right store details of the positioning data currently
being executed (positioning data No. given by
Md.44
).
Md.48
Deceleration start flag
•
"1" is stored when the constant speed status or acceleration status switches to the
deceleration status during position control whose operation pattern is "Positioning
complete".
•
"0" is stored at the next operation start or manual pulse generator operation
enable.