Mitsubishi FX2N-10GM - Page 93

FX Series Positioning Controllers Parameters 4
4-17
PARA. 15: Zero return direction
Set the direction in which the machine travels when the zero return instruction is given.
PARA. 16: Machine zero point address
Set the present address at which the machine is placed when the zero return operation is com-
pleted.
The units of the set value are determined by PARA. 0 and PARA. 3. The value set here is
treated as an absolute address. Set this parameter to "0" when absolute position detection
(ABS) is performed.
PARA. 17: Zero point signal count
Set the number of zero point signals to be counted after the DOG switch input is turned ON or
OFF (The count timing is set by PARA. 18.) until the machine is stopped. One zero point signal
pulse is output per rotation of the motor (in the case of a servo motor) in general.
When PARA. 17 is set to "0", the machine immediately stops when the DOG input turns on or
off. (You can set the counting timing by PARA. 18.) At this time, the machine drastically stops
from the zero point return speed (PARA. 13).
If the machine may be damaged by drastic stop, set parameters so that the machine safely
decelerates to the creep speed (PARA. 14), then stops.
PARA. 18: Zero signal count start timing
Set the point at which the zero signal count is started.
PARA. 19: DOG switch input logic
Set the DOG switch input logic.
Table 4.20: Zero return direction
FX
2N
-10GM FX
2N
-20GM
Setting = "0" : Direction in which the present value increases.
Setting = "1" : Direction in which the present value decreases.
Table 4.21: Machine zero point address
FX
2N
-10GM FX
2N
-20GM
-999,999 to +999,999
Table 4.22: Zero point signal count
FX
2N
-10GM FX
2N
-20GM
0 to 65,535
Table 4.23: Zero signal count start timing
FX
2N
-10GM FX
2N
-20GM
Setting = "0": When the front end of the near-point dog reaches the DOG switch (OFF to ON).
Setting = "1": When the rear end of the near-point dog reaches the DOG switch (ON to OFF).
Setting = "2": When the near-point dog is not used.
Table 4.24: DOG switch input logic
FX
2N
-10GM FX
2N
-20GM
Setting = "0" : Normally open. (The DOG switch is closed at the near-point.)
Setting = "1" : Normally closed. (The DOG switch is opened at the near-point.)