Pa2_10 Homing Direction After Reference Signal Detection; Pa2_11 Reference Signal For Shift Operation - Fuji Electric ALPHA7 User Manual

PA2_10 Homing direction after reference signal detection

No. Name
10 Homing direction after
reference signal detection
Specify the direction of the zero position when viewed from the reference signal for shift operation. The
reference signal for shift operation is passed during home position shift unit amount travel in this
direction.
-OT
 If +OT, -OT, or stopper is set for the homing reference signal, this parameter will be disabled,
and the direction opposite to that of the set OT signal or detected stopper will be the homing
direction. Furthermore, this parameter will also be disabled if "Encode Z-phase" is selected for
the homing reference signal, and the homing direction will be the homing starting direction.
The definition of the direction of motion is shown below.
Forward: direction of position increase Reverse: direction of position decrease

PA2_11 Reference signal for shift operation

No. Name
Reference signal for shift
11
operation
Specify the signal serving as a standard of the home position.
The position of a travel from the specified reference signal toward the homing direction after reference
signal detection by the home position shift unit amount is the home position.
The home position accuracy (reproducibility of zero position) is the highest with 3 (encoder Z-phase).
If the Z-phase is selected, the reference signal for shift operation (deceleration starting signal) can be
installed.
Next to the encoder Z-phase, 4 (interrupt input) has the highest home position accuracy (reproducibility
of zero position). This is because 4 (interrupt input) detects the interrupt position with a signal while 0
(home position LS), 2 (+OT) and 3 (-OT) detects a level.
Encoder Z-phase
-OT
 If one among 0 (home position LS), 2 (+OT) and 3 (-OT) is selected, there is an error of ±250 [pulses]
in the zero position at a creep speed for homing of 50 [r/min].
Setting range
0: Forward rotation
1: Reverse rotation
Reverse Forward
Reference signal for
shift operation
Setting range
0: Home position LS
1: Encoder Z-phase
2: +OT 3:-OT 4: Interrupt input
5: Stopper
Interrupt +OT
Home
input
position LS
Automatic Operation Setting Parameters
CHAPTER 4 PARAMETER
Default
value
0
+OT
Default
value
1
Home position shift unit
amount
Reference signal for
shift operation
Change
Power
4
Change
Power
4-45