Mitsubishi Electric MELSERVO MRJ2S-B, Инструкция по эксплуатации

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Absolute position detection system General description
6 - 2
6.1.2 System configuration
6.1.3 Communication overview
Block diagram
The encoder consists of a detector designed to detect a position within one revolution and a
cumulative revolution counter designed to detect the number of revolutions. The absolute
position detection system always detects the absolute position of the machine and keeps it
battery-backed, independently of whether the servo system controller power is on or off.
Therefore, once home position return is made at the time of machine installation, home position
return is not needed when power is switched on thereafter. If a power failure or a fault occurs,
restoration is easy. Also, the absolute position data, which is battery-backed by the super
capacitor in the encoder, can be retained within the specified period (cumulative revolution
counter value retaining time) if the cable is unplugged or broken (for data holding time refer tab.
6-1).
S000994
Fig. 6-1: System configuration
S000995C
Fig. 6-2: Communication block diagram
CN1 CN2
CN5
Battery
Controller
Servo amplifier
Servo motor
Controller
Servo amplifier
Servo motor
1 pulse/rev accumulative revolution
counter
Within one-revolution counter
Current
position
Home position data
LS0
CYC0
(Encoder)
Position data
MR-BAT
Detecting the
number of
revolutions
Detecting
the position
within one
revolution
High speed serial
communication
Position control
speed control
Battery
Capacitor