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MELSEC-A
8 ZERO POINT RETURN CONTROL
8.3 High-speed zero point return
8.3.1 Outline of the high-speed zero point return operation
High-speed zero point return operation
In a high-speed zero point return, positioning is carried out by a machine zero
point return to the "
Md.43 Zero point absolute position" stored in the AD75.
The following shows the operation during a high-speed zero point return start.
1) The high-speed zero point return is started.
2) Positioning control begins to the "
Md.43 Zero point absolute position",
following the speed set in the zero point return parameters (
Pr.45 to
Pr.59
).
3) The high-speed zero point return is completed.
* The "
Pr.47 Zero point address" is a fixed value set by the user, but the
"
Md.43 Zero point absolute position" is constantly changed by the AD75 to
indicate the "zero point", even if there is a change in the address information.
Machin zero point
(zero point position)
Pr. 48 Zero point return speed
High-speed zero point return start
(Positioning start signal)
Md.35 Axis operation status
In position control
Standing by
Standing by
Zero point
Positioning to the zero
M
Fig. 8.12 High-speed zero point return
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