Mitsubishi Electric MELSEC-Q Series - Machine HPR; Outline of the Machine HPR Operation

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Chapter 8 HPR Control
8.2 Machine HPR
8.2.1 Outline of the machine HPR operation
Machine HPR operation
In a machine HPR, HP is established.
None of the address information stored in the Simple Motion module, PLC CPU, or
servo amplifier is used at this time. The position mechanically established after the
machine HPR is regarded as the "HP" to be the starting point for positioning
control.
M
HP
Proximity dog
Machine HPR
Fig. 8.2 Example of a machine HPR
The method for establishing an "HP" by a machine HPR differs according to the
method set in "[Pr.43] HPR method".
The following shows the operation when starting a machine HPR.
When "[Pr.43] HPR method" is set to other than "driver HPR method" [RJ010
mode]
1) The machine HPR is started.
2)
The operation starts according to the speed and direction set in the HPR parameters
([Pr.43] to [Pr.57]).
3)
The "HP" is established by the method set in "[Pr.43] HPR method", and the machine
stops. (Refer to Sections 8.2.2 to 8.2.7)
4)
If "a" is set as "[Pr.45] HP address", "a" will be stored as the current position in the
"[Md.20] Feed current value" and "[Md.21] Feed machine value" which are monitoring
the position.
5) The machine HPR is completed.
POINT
Use the HPR retry function when the HP is not always in the same direction from
the workpiece operation area (when the HP is not set near the upper or lower limit
of the machine).
The machine HPR may not complete unless the HPR retry function is used.