Mitsubishi Electric MELSEC Q Series User Manual page 25

1 OVERVIEW
Communication
Control signals
Write data
Status signal
Read data
Communication
Control signals of SSCNET
Status signals of SSCNET
Communication
Forced stop input signal
(1) QD74MH ― PLC CPU
The QD74MH and PLC CPU communicate the following data via the base unit.
Signal related to commands
• Y0: PLC READY signal
• Y1: All axis servo ON signals
• Y2: Stop signals
• Y10 to Y1F: Positioning start signals
Data to be written to buffer memory
• Parameter
(Basic, OPR, Manual control, System, Servo)
• Control data
• Positioning data
Signal indicating QD74MH state
• X0: Unit READY signal
• X1: Error detection signal
• X2: Warning detection signal
• X2: Synchronization flag signal
• X10 to X1F: Busy signal
Data to be read from buffer memory
• Parameters
(Basic, OPR, Manual control, System, Servo)
• Monitor data
• Control data
• Positioning data
(2) QD74MH ― Servo amplifier
The QD74MH and servo amplifier communicate the following data via the
SSCNET .
Command signals to servo amplifier
• Position commands
• Control commands
• Servo parameters
Monitor information of the servo amplifier
• Operating information of the servo amplifier
• Servo parameters (Auto tuning, Parameter
change by MR Configurator, etc.,)
• External input signals (DOG, FLS, RLS) of the
servo amplifier
(3) QD74MH ― Forced stop input signal
The QD74MH and forced stop input signal communicate the following data via
the forced stop input connector.
Forced stop input signal to QD74MH
Details
Details
Details
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MELSEC-Q
Signal direction
PLC CPU QD74MH
QD74MH PLC CPU
Signal direction
QD74MH Servo amplifier
Servo amplifier QD74MH
Signal direction
Forced stop input QD74MH