< When normally closed contacts are used >
The input connection diagram shown below indicates
the case where the BFM #3 b 12 and b14 are set to 1
and normally closed contacts (b-contacts) are used.
Input switches SW1 to SW3 are selected in accordance
with the type of operation.
• To assure safety, provide limit switches for
detecting the forward and reverse limits on the
servo amplifier also. (See Section 8.4.)
Make sure so that the limit switches on the PC
are actuated simultaneously with or a little earlier
than the limit switches on the servo amplifier.
• Because a drive amplifier for a stepper motor does
not have these terminals, make sure to provide
limit switches on the PC.
• When b2 and b3 of the BFM #25 are driven by
these signals, pulse output is immediate stopped
and the counter clear output CLR is generated.
(See Section 8.4.)
• Evade from the state of the pulse output stop by
Jog in the opposite direction when forward pulse
stop (BFM #25 b2) or reverse pulse stop (BFM
#25 b3) is turned on.
• Because the counter clear output CLR is genarated,
the forward pulse stop and the reverse pulse stop
cannot be used as a stop and home position.
PC
Forward
limit
Forward
limit
Servo amplifier
LSP LSN
Reverse
limit
Reverse
limit
24V
SW1
Home position
return
LSD
Near point
signal
SW2
Interrupt
single-speed
LSI
INTERRUPT
input
SW3
External
command
LS1
Deceleration
start
STOP
input
SW3
External
command
LS2
Stop point
0V S/S STOP DOG
PGU
PC
S/S
24V
DC
6
FX-1PG/FX
2N
-1PG PULSE GENERATOR UNIT OUTLINE OF OPERATION MODES
6-11
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