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12 CONTROL SUB FUNCTIONS
12.6 Absolute position system
PLC
CPU
Axis No.
Buffer memory
The QD75MH can construct an absolute position system by installing the absolute
position system and connecting it through SSCNET
The following describes precautions when constructing the absolute position system.
Position command
Control command
Servo parameter
Monitor data
Fig. 12.33 Configuration of absolute position system
[1] Setting for absolute positions
When constructing an absolute position system, use a servomotor with absolute
position detector.
It is also necessary to install a battery for retaining the location of the OPR in the
servo amplifier. When an absolute position detector is installed, the "
Absolute position detection system" is selected "1: Valid" in the amplifier setting
for the servo parameters (basic setting).
Axis 1
30103
QD75MH
Position command
Control command
Servo parameter
OPR
address
Monitor data
Return of the present value
Axis 2
30303
12 - 59
.
Battery
Servo amplifier
Back-up
Absolute position detector
Axis 3
Axis 4
30503
30703
MELSEC-Q
Servomotor
M
PLG
Pr.103
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