Designating The Positioning Address; Absolute System; Incremental System - Mitsubishi Electric QD77MS User Manual

9.1.3 Designating the positioning address

The following shows the two methods for commanding the position in control using
positioning data.

Absolute system

Positioning 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
Address
100
Address 150
100
OP
A point
(Reference point)
Within the stroke limit range
Fig. 9.6 Absolute system positioning

Incremental system

The position where the machine is currently stopped is regarded as the start point,
and positioning is carried out for a designated movement amount in a designated
movement direction.
Movement amount
+100
Movement
amount -150
Movement amount-100
100
OP
A point
(Reference point)
Within the stroke limit range
Fig. 9.7 Incremental system positioning
Address
100
150
Address
300
Address 100
Address 150
150
B point
Movement amount
Movement amount
+100
150 250
B point
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Chapter 9 Major Positioning Control
Start point
End point
300
C point
Start point
End point
-100
300
C point