Omron R88D-KTA5L User Manual page 166

3-1 Servo Drive Specifications
Encoder Outputs (Phases A, B and Z)
Pin 21: +A, 22: -A, 48: -B, 49: +B, 23: +Z, 24: -Z
Function
 It outputs the phase A, phase B, and phase Z encoder signals for the Servomotor.
 The encoder outputs conform to the RS-422 communication method.
 You can use External Feedback Pulse Dividing Numerator Setting (Pn324) and External
Feedback Pulse Dividing Denominator Setting (Pn325) to set the dividing ratio.
 The logical relation of phase B to the phase A pulse and whether to set the output source to an
encoder or external encoder can be selected with Encoder Output Direction Switching Selection
(Pn012).
 The ground for the output circuit line driver is connected to the signal ground (ZGND). It is not
3
isolated.
 The maximum output frequency is 4 Mpps (after quadruple multiplier).
 The output frequency = the motor encoder resolution × (Pn324/Pn325) × 4 × motor rotation speed
(r/min)/60
 The output phases are as shown below. (They are the same for both incremental and absolute
encoders.)
Phase A
Phase B
Phase Z
3-47
Synchronous
 If
the motor encoder
resolution × Pn324/Pn325
is a multiple of 4, phases Z
and A are synchronized.
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Phase A
Phase B
Phase Z
Asynchronous
 In cases except for the one
on the left, phases A and Z
are not synchronized.