SMC Networks LECYU Series, Operation Manual

Page: 124 / 250

4 Operation
4-25
4.4.4 Encoder Output Pulses
The encoder pulse output is a signal that is output from the encoder and processed inside the DRIVER. It is
then output externally in the form of two phase pulse signal (phases A and B) with a 90
°
phase differential. It is
used as the position feedback to the host PC or PLC...etc.
Signals and output phase form are as shown below.
(1) Signals
Type
Signal
Name
Connector
Pin Number
Name Remarks
Output
PAO CN1-17
Encoder output pulse: phase A
These encoder pulse output pins out-
put the number of pulses per motor
revolution that is set in Pn212. Phase
A and phase B are different from
each other in phase by an electric
angle of 90
°
.
/PAO CN1-18
PBO CN1-19
Encoder output pulse: phase B
/PBO CN1-20
PCO CN1-21
Encoder output pulse: phase Z
One pulse is output per motor rota-
tion.
/PCO CN1-22
Host PC or
PLC...etc
DRIVER
CN1 CN2
PAO
PBO
PCO
Converts
serial
data to
pulse.
Serial
data
(2) Output Phase Form
Note: The pulse width for phase Z (origin pulse) changes according to the setting of the encoder output pulses (Pn212) and
becomes the same as that for phase A.
Even in reverse rotation mode (Pn000.0 = 1), the output phase form is the same as that for the standard setting
(Pn000.0 = 0) above.
If using the DRIVER
’s phase-Z pulse output for a zero point return, rotate the ser-
vomotor two or more times before starting a zero point return. If the servomotor cannot
be rotated two or more times, perform a zero point return at a motor speed of 600 min
-1
or below. If the motor speed is faster than 600 min
-1
, the phase-Z pulse may not be out-
put correctly.
Z
Z