6.12 Absolute Encoders
6.12.4 Reading the Position Data from the Absolute Encoder
6-74
Using the Pull-Up Power Supply in the SERVOPACK
Using an External Pull-Up Power Supply
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.
Pull-Up Voltage (Vcc) Pull-Up Resistance (R1)
24 V
1.8 kΩ to 2.7 kΩ
12 V max.
820
Ω to 1.5 kΩ
5 V max.
180
Ω to 470 Ω
Circuit Example for Open-Collector Outputs
SERVOPACK
Host controller
PL1, PL2, or PL3 terminal
0 V
+12 V
4.7 kΩ
150 Ω
ON:
1.5 V max.
Approx. 9 mA
SERVOPACK
VF = 1.5 V to 1.8 V
Vcc
Tr 1
V
F
R1
i
Host controller
150 Ω
4.7 kΩ
Pull-up
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