Absolute Position System - Mitsubishi Electric QD77MS User Manual

13.6 Absolute position system

PLC
CPU
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.
Simple Motion
Position command
Control command
Servo parameter
Monitor data
Fig. 13.33 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.
Absolute position detection system (PA03)
module
Position command
Control command
Servo parameter
OP
address
Monitor data
Return of the present value
QD77MS2/QD77MS4
13 - 65
Chapter 13 Control Sub Functions
Battery
Servo amplifier
Back-up
Buffer memory address
QD77MS16
30103+200n 28403+100n
Servomotor
M
Encoder
n: Axis No.-1