Mitsubishi A1SD75P1-S3, Руководство пользователя

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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
Stopper stop method 1)
: Execution may not be possible due to the stopper
Stopper stop method 2)
: Execution may not be possible due to the stopper
Stopper stop method 3)
: Execution not possible
Count method 1)
: Execution possible
Count method 2)
: Execution possible
(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 drive unit power turns OFF by the
upper/lower limit switches connected to the AD75. If the drive unit power is
turned OFF, the zero point return retry cannot be carried out.
(3) Setting the zero point return retry function
To use the "zero point return retry function", set the required details in the
parameters shown in the following table, and write them to the AD75.
When the parameters are set, the zero point return retry function will be added to
the machine zero point return control. The set details are validated at the rising
edge (OFF ON) of the PLC READY signal (Y1D). Set " Pr.58 Dwell time
during zero point return retry" according to the user's requirements.
Setting item
Setting
value
Setting details
Factory-set
initial value
Pr.50
Zero point return
retry
1
Set "1: Carry out zero point return retry by limit
switch".
0
Pr.58
Dwell time during
zero point return
retry Set the deceleration stop time during zero point
return retry.
(Random value between 0 and 65535 (ms))
0
* 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 the AD75
software package. Execution by sequence program uses many sequence
programs and devices. The execution becomes complicated, and the scan times
will increase.
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