5   Basic Control Mode
5 - 4
OMNUC G5-series (Pulse-train Input Type) AC Servomotors and Servo Drives User’s Manual
Command Pulse Rotation Direction Switching Selection and Command Pulse Mode Selection settings 
are as follows.
Pn006 Pn007
Command pulse 
pattern 
Signal
Forward direction 
command
Reverse direction 
command
0 0 or 2 90° phase 
difference
2-phase pulse
(Phase A and 
Phase B)
PULS
SIGN
1 Forward direction 
pulse train
+
Reverse direction 
pulse train
PULS
SIGN
3 Pulse train
+
Sign
PULS
SIGN
1 0 or 2 90° phase 
difference
2-phase pulse
(Phase A and 
Phase B)
PULS
SIGN
1 Forward direction 
pulse train
+
Reverse direction 
pulse train
PULS
SIGN
3 Pulse train
+
Sign
PULS
SIGN
Symbol
Maximum 
allowable input 
frequency
Minimum required duration [µs]
t1 t2 t3 t4 t5 t6
+CWLD, –CWLD, 
+CCWLD, –CCWLD
4 Mpps 0.25 0.125 0.125 0.125 0.125 0.125
+CW, –CW, 
+CCW, –CCW
Line driver 500 kpps 2 1 1 1 1 1
Open collector 200 kpps 5 2.5 2.5 2.5 2.5 2.5
 
t1
t1
Phase 
B
t1
t1
t1
Phase 
A
t1
t1
t1
Phase B is 90° behind phase A.Phase B is 90° ahead of phase A.
t2
t2
t2
t2
t3
 
 
 
 
 
t4
t4
t5
t5
t6
L
H
t6
t6
t6
 
 
 
 
 
 
 
t1
t1t1
t1
t1
t1
t1
t1
Phase 
B
Phase 
A
Phase B is 90° behind phase A.
Phase B is 90° ahead of phase A.
 
 
t2
t2
t2
t2
t3
 
t4
t5
t4
t5
t6
t6
H
L
t6
t6