Mitsubishi Electric MELSEC-Q Series User Manual page 611

POINT
The settings of the upper/lower stroke limit signal are shown below. The HPR retry
function can be used with either setting. (Refer to Section 13.4.4 "Hardware stroke
limit function".)
• External input signal of servo amplifier
• External input signal via CPU (buffer memory of QD77GF)
[3] Setting the HPR retry function
To use the "HPR retry function", set the required details in the parameters shown
in the following table, and write them to the Simple Motion module.
When the parameters are set, the HPR retry function will be added to the
machine HPR control. The set details are validated at the rising edge (OFF
ON) of the PLC READY signal [Y0]. Set "[Pr.57] Dwell time during HPR retry"
according to the user's requirements.
Setting item
[Pr.48] HPR retry
Dwell time during
[Pr.57]
HPR retry
: Refer to Section 5.2 "List of parameters" for setting details.
REMARK
 Parameters are set for each axis.

It is recommended that the parameters be set whenever possible with GX Works2.
Execution by sequence program uses many sequence programs and devices. The
execution becomes complicated, and the scan times will increase.
Setting
value
1 Set "1: Carry out HPR retry by limit switch".
Set the deceleration stop time during HPR retry.
(Random value between 0 and 65535 (ms))
13 - 7
Chapter 13 Control Sub Functions
Setting details
Factory-set
initial value
0
0