12 - 10
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
12.2.2 Zero point shift function
When a machine zero point return is carried out, the zero point is normally established
using the near-point dog and zero point. However, by using the zero point shift
function, the machine can be moved a designated movement amount from the position
where the zero point was detected. A mechanically established zero point can then be
interpreted at that point.
The zero point shift function can be used without relation to "
Pr.45 Zero point return
method".
The details shown below explain about the "zero point shift function".
(1) Control details
(2) Setting range for the zero point shift amount
(3) Movement speed during zero point shift
(4) Precautions during control
(5) Setting the zero point shift function
(1) Control details
The following drawing shows the operation of the zero point shift function.
Zero point return direction
Machine zero point return start
Shift operation is carried out.
Speed selected by the "
speed designation during
zero point shift"
Zero point
Zero point return speed
Near-point dog
Creep speed
Zero point shift amoun
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