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Chapter 13 Control Sub Functions
13.6 Absolute position system
The Simple Motion module can construct an absolute position system by installing the
absolute position system and connecting it through SSCNET
/H.
The following describes precautions when constructing the absolute position system.
The configuration of the absolute position system is shown below.
Servomotor
Servo amplifier
Position command
Control command
Servo parameter
Simple Motion
module
Monitor data
PLC
CPU
OPR
address
M
Absolute position detector
Back-up
Return of the present value
Battery
Position command
Control command
Servo parameter
Monitor data
Encoder
Fig. 13.35 Configuration of absolute position system
[1] Setting for absolute positions
For constructing an absolute position system, use a servo amplifier and a
servomotor which enable absolute position detection.
It is also necessary to install a battery for retaining the location of the OPR in the
servo amplifier. To use the absolute position system, select "1: Enabled (absolute
position detection system)" in "Absolute position detection system (PA03)" in the
amplifier setting for the servo parameters (basic setting).
Refer to each servo amplifier instruction manual for details of the absolute
position system.
Buffer memory address
QD77MS2/QD77MS4 QD77MS16
Absolute position detection system (PA03) 30103+200n 28403+100n
n: Axis No.-1