YASKAWA E-7-Series SGD7S Product Manual page 243

6.12 Absolute Encoders
6.12.4 Reading the Position Data from the Absolute Encoder
 Using the Pull-Up Power Supply in the SERVOPACK
Host controller
ON:
1.5 V max.
 Using an External Pull-Up Power Supply
Pull-Up Voltage (Vcc)
Circuit Example for Open-Collector Outputs
Host controller
Pull-up
Sequence for Reading the Position Data from the Absolute
Encoder Using the SEN (Absolute Data Request) Signal
The sequence for using the SEN signal to read the position data from the absolute encoder of a Rotary
Servomotor is given below.
The multiturn data is sent according to the transmission specifications.
The position of the absolute encoder within one rotation is output as a pulse train.
6-74
SERVOPACK
PL1, PL2, or PL3 terminal
Ω
150
4.7 k
Approx. 9 mA
Pull-Up Resistance (R1)
24 V 1.8 kΩ to 2.7 kΩ
12 V max.
820
5 V max. 180
SERVOPACK
Vcc
R1
i
Ω
150
4.7 k
Tr1
VF = 1.5 V to 1.8 V
+12 V
S_Analog
Ω
0 V
Ω Ω
to 1.5 k
Ω Ω
to 470
Ω
V F