Yaskawa MP920 Motion Module - Manual (Page 319)

7.2 Functions
7-17
7
„ Reference Pulse Forms
Reference pulses are either sign + pulse train (sign) or CW/CCW. Either form outputs a 5-V
differential.
Sign Reference Pulses
The CW pulse is the reference pulse train.
The CCW pulse is the sign.
The Servomotor rotates in the forward direction when the CCW pulse is high and in the
reverse direction when the CCW pulse is low.
CW/CCW
The CW pulse is the reverse reference pulse for the Servomotor.
The CCW pulse is the forward reference pulse for the Servomotor.
CW/CCW output signal polarity can be reversed. The following table shows the reference
pulses.
Table 7.3 Reference Pulse Forms
Motion Fixed Parameters
(Parameter No. 37:
Pulse Output Signal Form
Selection)
Reference Pulse
Form
Servomotor Forward
Direction Reference
(CCW Direction)
Servomotor Reverse
Direction Reference
(CW Direction)
Bit 8 Bits 12 to 15
0
(Positive Logic) 1 Sign + pulse train
0 CW pulse +
CCW pulse
1
(Negative Logic) 1 Sign + pulse train
0 CW pulse +
CCW pulse
H
PULSE
(CW)
SIGN
(CCW) L
PULSE
(CW)
SIGN
(CCW)
L
PULSE
(CW)
SIGN
(CCW)
PULSE
(CW)
SIGN
(CCW) L
PULSE
(CW)
SIGN
(CCW) L
PULSE
(CW)
SIGN
(CCW)
H
PULSE
(CW)
SIGN
(CCW)
H
PULSE
(CW)
SIGN
(CCW)
H