Mitsubishi Electric Melsec-F FX3GC Series User Manual page 151

FX /FX /FX /FX /FX
3S 3G 3GC 3U 3UC
Built-in Positioning Functions
4) If the limit switch in the zero return direction turns ON (if the start position is at forward rotation limit 1 or
reverse rotation limit 1):
a) When the zero return instruction is executed, zero return will be started.
b) Transfer operation will be started in the opposite direction of the zero return direction at the zero return
speed.
c) If the front end of the DOG is detected, the speed will decelerate and the operation will stop. (The
workpiece will detect the DOG and then come out of the DOG area.)
d) Transfer operation will be restarted in the zero return direction at the zero return speed (and the
workpiece will enter the DOG area again).
e) If the front end of the DOG is detected, the speed will be reduced to the creep speed.
f) After detecting the rear end of the DOG, if the first zero-phase signal is detected, the operation will be
stopped.
PLC User's Manual - Positioning Control Edition 6 Mechanical Zero Return - DSZR/ZRN Instruction
6.2 DOG Search Zero Return (DSZR Instruction)
A
B
Apx.
B - 107