Yaskawa SGDB User Manual

Page 171

3.8 Special Wiring

159

• Incremental Pulse and Home Position

Pulse:

Initial incremental pulses which pro-
vide absolute data are first divided by
the frequency divider inside the SER-
VOPACK and then output in the same
way as normal incremental pulses.

• Use the following parameter to set the pulse dividing ratio.

Cn-0A

PGRAT

Dividing Ratio

Setting

Unit: P/R

Setting Range:

16 to Number

of Encoder

Pulses

For Speed/Torque

Control and

Position Control

Set the number of output pulses for PG output
signals (PAO, /PAO, PBO and /PBO).

Pulses from motor encoder (PG) are divided
by the preset number of pulses before being
output.

The number of output pulses per revolution is
set in this parameter. Set this value according
to the reference unit of the machine or control-
ler to be used.

The setting range varies according to the en-
coder used.

Phase A

Phase B

Phase C

Forward

rotation

Reverse

rotation

• Note that phase C is not divided so its pulse

width is narrower than phase A.

Phase A

Phase B

Phase C

SGMj

servomotor

encoder

SGDB

SERVOPACK

Output terminals:
PAO (1CN-33)

/PAO (1CN-34)

PBO (1CN-35)

/PBO (1CN-36)

Setting example:

Preset value: 16

1 revolution

Phase A

Phase B

Output

Fre-

quency

divider

PA0
PB0