Mitsubishi A1SD75M1, User Manual

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12 - 8
MELSEC-A
12 CONTROL AUXILIARY FUNCTIONS
(2) Precaution during control
(a) The following table shows whether the zero point return retry function may
be executed by the " Pr.45 Zero point return method".
Pr.45 Zero point return method Execution status of zero point return retry function
Near-point dog method
: Execution possible*
1
Near-point dog method 2)
: Execution possible*
2
Count method 1)
: Execution possible*
3
Count method 2)
: Execution possible
Count method 3)
: Execution possible
Data setting method
: Execution not possible
*1: In the case of the AD75 whose software version is "P" or earlier, if the zero point is not
passed between a machine zero point return start and the near-point dog OFF, the machine
decelerates to a stop due to an error "zero point not pass at zero point return" (error code:
210), and the zero point return retry function is not executed.
*2: When the zero point is not passed between a machine zero point return start and the near-
point dog OFF, the operation performed when the zero point is not passed is performed if the
zero point return retry function is made valid.
Refer to section 8.2.4 for the operation of the near-point dog method 2).
*3: If the zero point is not passed between a machine zero point return start and the near-point
dog OFF, the machine decelerates to a stop due to an error "zero point not pass at zero
point return" (error code: 210), and the zero point return retry function is not executed.
(b) Always establish upper/lower limit switches at the upper/lower limit positions
of the machine, and connect an AD75 module. If the zero point return retry
function is used without hardware stroke limit switches, the motor will
continue rotation until a hardware stroke limit signal is detected.
(c) Always wire AD75 upper/lower limit switches even when the zero point
return function is invalidated. Control cannot be carried out with the AD75
unless the wiring is carried out.
(d) Do not carry out settings so that the servo amplifier power turns OFF by the
upper/lower limit switches connected to the AD75. If the servo amplifier
power is turned OFF, the zero point return retry cannot be carried out.