Sub Functions Specifically For Machine Hpr; Hpr Retry Function [Rj010 Mode] - Mitsubishi Electric MELSEC-Q Series User Manual

13.2 Sub functions specifically for machine HPR

13.2.1 HPR retry function [RJ010 mode]

1) The movement starts in the "[Pr.44] HPR direction" by a machine HPR start.
2) The operation decelerates when the limit signal OFF is detected.
3) After stopping due to the limit signal OFF detection, the operation moves at the "[Pr.46] HPR speed" in the
opposite direction of the "[Pr.44] HPR direction".
4) The operation decelerates when the proximity dog turns OFF.
5) After stopping due to the proximity dog OFF, a machine HPR is carried out in the "[Pr.44] HPR direction".
6) Machine HPR completion.
The sub functions specifically for machine HPR include the "HPR retry function" and
"HP shift function". Each function is executed by parameter setting.
When the workpiece goes past the HP without stopping during positioning control, it
may not move back in the direction of the HP although a machine HPR is commanded,
depending on the workpiece position. This normally means the workpiece has to be
moved to a position before the proximity dog by a JOG operation, etc., to start the
machine HPR again. However, by using the HPR retry function, a machine HPR can
be carried out regardless of the workpiece position.
The details shown below explain about the "HPR retry function".
[1] Control details
[2] Precautions during control
[3] Setting the HPR retry function
[1] Control details
The following drawing shows the operation of the HPR retry function.
(1) HPR retry point return retry operation when the workpiece is within the
range between the upper and lower limits.
5)
4)
ON
Proximity dog
Zero signal
Fig. 13.1 HPR retry operation by limit signal detection
1)
6)
Limit signal OFF
Hardware limit switch
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Chapter 13 Control Sub Functions
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