Mitsubishi Electronics QD75P, QD75D user manual Melsec-Q

9 MAJOR POSITIONING CONTROL

MELSEC-Q

3)Speed switching condition

If the movement amount is small in regard to the target speed, the current speed may not reach the target speed even if acceleration/deceleration is carried out. In this case, the machine is accelerated/decelerated so that it nears the target speed.

If the movement amount will be exceeded when automatic deceleration is required (Ex. Operation patterns "00", "01"), the machine will immediately stop at the designated positioning address, and a "insufficient movement distance warning (warning code: 513)" will occur.

[When the speed cannot change over to the P2 speed in P1]

When the relation of the speeds is P1 = P4, P2 = P3, P1 < P2.

P1 P2 P3 P4

[When the movement amount is small during automatic deceleration]

The movement amount required to carry out the automatic deceleration cannot be secured, so the

machine immediately stops in a speed ≠ 0 status.

Positioning address

9 - 14