Fuji Electric ALPHA7, User Manual

Page: 248 / 662

CHAPTER 4 PARAMETER
Automatic Operation Setting Parameters
4-57
4
(2) OT reference homing profile (equivalent to homing profile 2 of FALDIC-
α
Series)
If the OT located in the starting direction for homing is detected after homing is started before the
reference signal for homing (deceleration starting signal) is detected, the motion reverses
automatically and a travel occurs in the opposite direction for a reference signal for shift operation
in this homing profile.
Secure homing is realized even if the direction of the reference signal for homing (deceleration
stating signal) or reference signal for shift operation in relation to the machine stopping position is
not known.
[Parameter setting example]
PA2_
No. Name Setting
Default
value
Change
06 Homing speed 500.00 [r/min] 500.00 Always
07 Creep speed for homing 50.00 [r/min] 50.00 Always
08 Starting direction for homing 0: Forward rotation 0 Power
09 Reverse traveling unit amount for homing 0 [unit amount] 0 Always
10
Homing direction after reference signal
detection
0: Forward rotation 0 Power
11 Reference signal for shift operation 1: Encoder Z-phase 1 Power
12
Reference signal for homing
(Deceleration starting signal)
0: Home position LS 0 Power
13 Home position LS signal edge selection 0: Rising edge timing 0 Power
14 Home position shift unit amount 1000 [unit amount] 1000 Always
15 Deceleration operation for creep speed
0: Reverse rotation
is
disabled
0 Power
16 Home position after homing completion 0 [unit amount] 0 Always
17 Home position detection range
0: Always ON after homing
completion
0 Always
18 Deceleration time at OT during homing 100.0 [ms] 100.0 Always
24
Selection of operation at OT during
homing
0: Reverse rotation 0 Power

Because the reverse rotation upon OT detection is enabled with the standard homing setting of
ALPHA7, the OT reference homing is executed with the same parameter settings as those of the
basic homing profile.
If the reference signal for homing (deceleration starting signal) is detected before OT is detected,
the motion profiles the same as that of (1) basic homing profile.
If OT is detected in the starting direction for homing during homing motion, the motion proceeds
in the following procedure.
(1) The motion starts at the rising edge (OFF → ON) of homing [ORG] in the starting direction
for homing (PA2_08) at the homing speed (PA2_06).
(2) If OT is detected in the starting direction for homing (PA2_08) before the home position LS
(PA2_12) is detected, the motion reverses at the homing speed (PA2_06).
(3) If home position LS (PA_12) is detected during reverse rotation, the motor will move at
homing speed (PA2_06) in the homing direction (PA2_10).