Specifying The Positioning Address - Mitsubishi Electric MELSEC iQ-F Series FX5 User Manual

• Speed switching condition
If the movement amount is small relative to the target speed and the target speed is not reached even if the acceleration/
deceleration is performed, the machine is accelerated or decelerated to get close to the target speed. If the movement
amount will be exceeded when the automatic deceleration needs to be performed (such as when the operation pattern is 00
or 01), the machine will immediately stop at the specified positioning address, and Insufficient movement amount (Warning
code: 0998H) occurs.
■When the speed cannot be changed to the P2 speed in P1
When the relation of the speeds is P1 = P4, P2 = P3, P1 < P2
V
P1 P2

Specifying the positioning address

One of the following two methods can be used for commanding the position in the control using positioning data.
Absolute system
The positioning is performed to a specified position (absolute address) having the OP as a reference. The specified address is
used as the positioning address. (Any address can be set as the start point.)
Address
100
Address 150
OP 100
(Reference
Point A
point)
Incremental system
The position where the machine is currently stopped is regarded as the start point, and the positioning is performed for a
specified movement amount in a specified movement direction.
Movement amount
+100
Movement amount +100
Movement amount -100
OP 100
(Reference
Point A
point)
9 MAJOR POSITIONING CONTROL
102
9.1 Overview of the Major Positioning Controls
P3 P4
t
Address
100
Address
150
Address
300
Address 100
Address 150
150
Point B
Within stroke limit range
Movement amount
-100
Movement amount
Movement
+100
amount
-150
Movement amount +50
150
Point B
Within stroke limit range
■When the movement amount is small during the automatic deceleration
As the movement amount required to perform the automatic deceleration
cannot be secured, the machine immediately stops with speed status ≠ 0.
V
Pn
Positioning address Positioning address
Start point
End point
300
Point C
Start point
End point
300
Point C
Pn+1
t