Mitsubishi Electric MELSEC-Q QD75M User Manual page 546

12 CONTROL SUB FUNCTIONS
Setting item
Pr.48 OPR retry
Dwell time during
Pr.57
OPR retry
Refer to Section 5.2 "List of parameters" for setting details.
[2] Precaution during control
(1) The following table shows whether the OPR retry function may be executed
Pr.43
by the "
Pr.43 OPR method
Near-point dog method
Count method 1)
Count method 2)
Data set method
(2) Always establish upper/lower limit switches at the upper/lower limit positions
of the machine, and connect an QD75 module. If the OPR retry function is
used without hardware stroke limit switches, the motor will continue rotation
until a hardware stroke limit signal is detected.
(3) Always wire QD75 upper/lower limit switches even when the OPR function
is invalidated. Control cannot be carried out with the QD75 unless the wiring
is carried out.
(4) Do not carry out settings so that the servo amplifier power turns OFF by the
upper/lower limit switches connected to the QD75. If the servo amplifier
power is turned OFF, the OPR retry cannot be carried out.
(5) The operation decelerates upon detection of the hardware limit signal, and
the movement starts in the opposite direction. In this case, however, an
error (104, 105) is not produced.
[3] Setting the OPR retry function
To use the "OPR retry function", set the required details in the parameters shown
in the following table, and write them to the QD75.
When the parameters are set, the OPR retry function will be added to the
machine OPR control. The set details are validated at the rising edge (OFF
ON) of the PLC READY signal (Y0). Set "
according to the user's requirements.
Setting
value
1 Set "1: Carry out OPR retry by limit switch".
Set the deceleration stop time during OPR retry.
(Random value between 0 and 65535 (ms))
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with GX
Configurator-QP. Execution by PLC program uses many PLC programs and
devices. The execution becomes complicated, and the scan times will increase.
OPR method".
Execution status of OPR retry function
: Execution possible
: Execution possible
: Execution possible
:
Pr.57
Setting details
12 - 7
MELSEC-Q
Dwell time during OPR retry"
Factory-set
initial value
0
0