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MELSEC-Q
1 PRODUCT OUTLINE
QD75 PLC CPU
The QD75 and PLC CPU communicate the following data via the base unit.
Direction
Communication
QD75
PLC CPU PLC CPU QD75
Control signal
Signal indicating QD75 state
• QD75 READY signal
• BUSY signal
and etc.
Signal related to commands
• PLC READY signal
• Various start signals
• Stop signals
• All axis servo ON signal
and etc.
Data (read/write)
• Parameter
• Positioning data
• Block start data
• Control data
• Monitor data
• Parameter
• Positioning data
• Block start data
• Control data
Refer to section "3.3 Specifications of input/output signals with PLC CPU" for details.
QD75 Peripheral device
The QD75 and peripheral device communicate the following data via the PLC CPU:
Direction
Communication
QD75
Peripheral device Peripheral device QD75
Data (read/write)
• Parameter
• Positioning data
• Parameter
• Positioning data
Test operation –
• OPR control start command
• Positioning control start command
• JOG/Inching operation start command
• Teaching start command
• Manual pulse generator operation
enable/disable command
Operation monitor • Monitor data –
QD75 Servo amplifier
The QD75 and servo amplifier communicate the following data via the SSCNET.
Direction
Communication
QD75
Servo amplifier Servo amplifier QD75
SSCNET
• Positioning commands
• Control commands
• Servo parameter
• Operating information of the servo
amplifier
• Servo parameter
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