8 Manual Control
8.3 Mechanical Zero Return Operation
88
FX3U-1PG User's Manual
8.3.3 Data-set type mechanical zero return operation
Data-set type mechanical zero return is the zero return method that is used to set the position, which is
traveled by the JOG operation etc., as a zero position. Therefore, the work piece does not move when the
data-set type mechanical zero return command is turned on.
This zero return method is often used in equipment for which the DOG cannot be used or in the transfer line
that does not have a mechanical zero position.
→ For details on the JOG speed, refer to Section 8.2.
1. Operation
1) Move the work piece to the position to be set as a zero position, by the JOG operation etc.
2) Set the data-set type mechanical zero return operation start from off to on. (It outputs the CLR signal.)
3) The set value of the zero-point address is written to the current address.
4) The zero return completion turns on.
In case of the data-set type zero return, the positioning completion flag does not turn on.
2. Positioning completion flag
Turns on when the zero return is completed and after the zero-point address is written to the current address.
Turns off when the power is turned off or when K0 is written to the status information. It does not turn off when
the operation is started.
3. Positioning completion flag
The positioning completion flag turns off when the data-set type mechanical zero return operation starts.
The positioning completion flag does not turn on when the zero return operation is completed.
Setting items of the data-set type mechanical zero return operation
BFM No.
Setting items
Positioning
parameter
Extension
positioning
parameter
#3 b1, b0 #37 b1, b0
Operation parameter
System of units
#3 b5, b4 #37 b5, b4 Position data multiplier
#14, #13 #50, #49 Zero-point address
#25 b15 Operation command
Data-set type mechanical zero return
operation start
#28 b2 Status information Zero return completion
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