Mitsubishi A1SD75P1-S3 User Manual page 423

12 CONTROL AUXILIARY FUNCTIONS
Machine zero point return start
(4) Precautions during control
(5) Setting the zero point shift function
Setting item
Zero point shift
Pr.55
amount
Speed designation
Pr.57 during zero point
shift
* Refer to "5.2 List of parameters" for setting details.
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(b) Zero point shift operation at the " Pr.49 Creep speed"
Pr. 46 Zero point
return direction
Pr. 49
Creep speed
Zero point
Near-point dog
Zero point signal
Fig. 12.7 Zero point shift operation at the creep speed
The following data are set after the zero point shift amount is complete.
•
Zero point return request flag ( Md.40 Status: b3)
•
Zero point return complete flag ( Md.40 Status: b4)
•
Md.29 Current feed value
•
Md.30 Machine feed value
•
Md.35 Axis operation status
•
Md.44 Movement amount after near-point dog ON (" Pr.55 Zero point shift
amount" is not added.)
To use the "zero point shift function", set the required details in the parameters
shown in the following table, and write them to the AD75.
When the parameters are set, the zero point shift function will be added to the
machine zero point return control. The set details are validated at the rising edge
(OFF ON) of the PLC READY signal (Y1D).
Setting
value
Set the shift amount during the zero point shift.
Select the speed during the zero point shift
0: Pr.48 Zero point return speed
1: Pr.49 Creep speed
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with the AD75
software package. Execution by sequence program uses many sequence
programs and devices. The execution becomes complicated, and the scan times
will increase.
When the " Pr. 55 Zero point
shift amount" is positive
Zero point
When the " Pr. 55 Zero point
shift amount" is negative
Setting details
12 - 10
MELSEC-A
Factory-set
initial value
0
0