Designating The Positioning Address - Mitsubishi Electric MELSECQ Series User Manual

9 POSITIONING CONTROL

9.1.3 Designating the positioning address

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The following shows the two methods for commanding the position in control using
positioning data.
Absolute system
Positioning control is carried out to a designated position (absolute address) having
the OP as a reference. This address is regarded as the positioning address. (The
start point can be anywhere.)
Address
100
Address 150
100
A point
Fig. 9.5 Absolute system positioning control
Incremental system
The position where the machine is currently stopped is regarded as the start point,
and positioning control is carried out for a designated movement amount in a
designated movement direction.
Movement amount
+100
Movement amount +100
Movement amount-100
100
OP
(Reference point)
A point
Within the stroke limit range
Fig. 9.6 Incremental system positioning control
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Address
100
Address
150
Address
300
Address 100
Address 150
150
B point
Within the stroke limit range
Movement amount
-100
Movement amount
+100
Movement
amount -150
Movement amount+50
150
B point
MELSEC-Q
Start point
End point
300
C point
Start point
End point
300
C point
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