Positioning Dedicated Signals - Mitsubishi Electric MELSEC Q Series Programming Manual

3 POSITIONING DEDICATED SIGNALS

3. POSITIONING DEDICATED SIGNALS
The internal signals of the Motion CPU and the external signals to the Motion CPU are
used as positioning signals.
(1) Internal signals
(2) External signals
PLC control
processor
PLC I/O module
(DI/O)
Note) : Device memory data : 1) = 2)
The following five devices of the Motion CPU are used as the internal signals of
the Motion CPU.
• Internal relay (M) .............................. M2000 to M3839 (1840 points)
• Special relay (SM) ........................... SM0 to SM2255 (2256 points)
• Data register (D) .............................. D0 to D799 (800 points)
• Motion register (#) ............................ #8000 to #8751 (752 points)
• Special register (SD) ....................... SD0 to SD2255 (2256 points)
The external input signals to the Motion CPU are shown below.
• Upper/lower limit switch input .......... The upper/lower limit of the positioning
• Stop signal ....................................... This signal makes the starting axis stop.
• Proximity dog signal ........................ ON/OFF signal from the proximity dog.
• Speed/position switching signal ...... Signal for switching from speed to position.
• Manual pulse generator input .......... Signal from the manual pulse generator.
Configuration between modules
PLC CPU
1)
Device memory
Multiple CPU
high speed
Multiple CPU
bus
high speed
transmission
memory
Q series PLC system bus
PLC intelligent
function module
(A/D, D/A, etc.)
Fig.3.1 Flow of the internal signals/external signals
3 - 1
range is controlled.
Motion CPU
2)
Device memory
Motion control
processor
Multiple CPU
high speed
transmission
memory
Motion module
(Proximity dog signal, manual
pulse generator input)
SSCNET (/H)
Servo
amplifier
Servo motor
M M
Servo external input signals
(FLS, RLS, DOG)
3