Mitsubishi FX2N-10GM, Hardware / Programming Manual

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FX Series Positioning Controllers Parameters 4
4-18
PARA. 20: Limit switch logic
Set the logic of the limit switch (LS) used to confirm the machine operation limit. Apart from the
limit switches, software limits (set by PARA. 25 and PARA. 26) are also available.
PARA. 13 to PARA. 20 control the portion shown in the figure below.
For the details of return to the zero point, refer to "8.2.1 Zero point return control instruction".
*1 The number of zero point signal pulses (PG0) sent from the drive unit to the positioning unit
is counted, and operation is stopped when this number reaches the specified value. Usually,
one zero point pulse is generated per rotation of the motor.
The machine zero return command can be given by either of the following four methods.
1) Turning ON an external input (from the [ZRN] terminal).
2) Executing the cod 28 (DRVZ, machine zero return) command.
3) Sending the machine zero return command from a peripheral unit.
4) Turning ON the special auxiliary relay (M9008 for the X axis and M9024 for the Y axis).
Table 4.25: Limit switch logic
FX
2N
-10GM FX
2N
-20GM
Setting = "0" : Normally open. (The limit switch is closed at the limit.)
Setting = "1" : Normally closed. (The limit switch is opened at the limit.)
*1
Switch that is turned ON
at the reverse limit.
PARA.19:DOG switch input logic
(Switch that is turned ON before the zero point).
Switch that is turned ON
at the forward limit.
PARA.18:
Zero point signal count start timing.
Rear end
Front
end
Motor
PARA.14: Creep speed.
Reverse
Forward PARA.15:
Zero return direction.
DOG LSR
LSF
Initial position
PARA.13: Zero return speed.
This is the
zero point.
PARA.16: Machine zero point address.
(The value set to PARA.16 is entered to
the present value address when the machine
zero return operation is completed.)
PARA.17:
PG0:
Adjust to ensure that the DOG switch actuation
point is within the period between two consecutive
PG0 pulses.
Zeropoint signal count.
Zero point signal.