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MELSEC-Q Series

SSCNETIII/H

High-speed Synchronous Network SSCNETIII/H

  • Communications speed is increased to 150 Mbps full duplex (equivalent to 300 Mbps half duplex), three times faster than the conventional speed.
    System response is dramatically improved.
  • Smooth control of a machine is possible using high-speed serial communications with a cycle time of 0.222 ms.
  • Synchronous communications are achieved with SSCNETIII/H, offering technical advantages for machines that require deterministic control.
  • Long distance wiring is possible up to 3200 m (10498.69 ft.) per system (maximum of 100 m (328.08 ft.) between stations x control axes up to 32 axes), suitable for large-scale systems.
  • SSCNETIII/H compatible and SSCNETIII compatible servo amplifiers can be used together.
    (The communications speed when SSCNETIII compatible products are used together in the same system: 150 Mbps full duplex)
  • (Note): SSCNET (Servo System Controller Network)


Deterministic and Synchronized Communication

Complete deterministic and synchronized communication is achieved with SSCNETIII/H, offering technical advantages in machines such as printing and food processing machines that require synchronous accuracy.

Central Control with Network

Large amounts of servo data are exchanged in real-time between the controller and the servo amplifier. Using MELSOFT MR Configurator2 on a personal computer that is connected to the Simple Motion module QD77MS helps consolidate information such as parameter settings and monitoring for the multiple servo amplifiers.

No Transmission Collision

The fiber-optic cables thoroughly shut out noise that enters from the power cable or external devices.
Noise tolerance is dramatically improved as compared to metal cables.

Positioning Control

Execute positioning control with the data table method.

  • The Data Setting Assistant function simplifies settings.
  • Positioning data can be set very simply by using functions such as Automatic Command Speed Calculation, Offline Simulation, and automatic calculation of auxiliary arc, etc.

Synchronous Control

Synchronous control can be easily achieved with software by placing mechanical modules on screen, such as the gear, shaft, speed change gear and cam.

  • The Synchronous control is easily performed with parameter settings. There is no need to create complicated programs.
  • Synchronous control is started/stopped on axis-by-axis basis. The synchronous control axis and positioning control axis can exist together in a program.
  • The movement amount of main shaft is transmitted to the output axis via the clutch.

Cam Control

Various cam pattern can be easily created.

  • Cam control has become more flexible. Various cam patterns are available.
  • You can set the stroke, speed, acceleration and throb while simultaneously checking the profile on a graph.
  • The created cam data are easily viewed as thumbnails.
  • Cam data is imported and exported in CSV format.

Control Flow

The start of positioning operation by the Simple Motion module is programmed in PLC CPU.
The Simple Motion module starts operation from the designated positioning data No. and continues operation until the operation pattern ends.

High Compatibility with the Previous Models

The Positioning module (QD75MH) projects and sequence programs are easily diverted to the Simple Motion module (QD77MS/LD77MS).
The replacement to QD77MS/LD77MS is easily completed without replacing the prior model of servo amplifier MR-J3-B.

Functions List

  Simple Motion Module
QD77MS16QD77MS4QD77MS2
Servo amplifier connection method SSCNETIII/H (150Mbps)
Maximum distance between stations [m(ft.)] 100 (328.08)
Connectable servo amplifier MR-J4(W)-B
Number of control axes 16 axes4 axes2 axes
Operation cycle 0.88/1.77From 0.88
Engineering environment Simple Motion Module Setting Tool (Note-1)          MR Configurator2
Control modes PTP (Point To Point) control, Position control, Speed control, Torque control,
Tightening & press-fit control, Cam control, Advanced synchronous control,
2 axes/3 axes/4 axes Linear interpolation, 2 axes Circular interpolation, Trajectory control,
Speed/position switching control (ABS/INC), Position/speed switching control (INC)
Control unit mm, inch, degree, PLS
Positioning data 600 data (positioning data No. 1 to 600)/axis
(Can be set with MELSOFT GX Works2 or Sequence program.)
Acceleration/deceleration method Trapezoidal acceleration/deceleration, S-curve acceleration/deceleration
Manual control JOG operation, Manual pulse generator operation, Inching operation
Functions that change control details Current value change, Target position change function, Torque change function, Speed change function,
Override function, Acceleration/deceleration time change function
Home position return method Near-point dog method, Count method 1, Count method 2, Data set method,
Scale home position signal detection method
Auxiliary function Forced stop function, Hardware stroke limit function, Software stroke limit function, Absolute position system,
Amplifier-less operation function, Unlimited length feed, Optional data monitor function,
Mark detection function, Flash ROM backup, Module error collection function, M-code output function,
Digital oscilloscope function, Cam auto-generation function
Number of I/O occupying points 32 points (I/O allocation: Intelligent function module, 32 points)
5VDC internal current consumption [A] 0.75 0.6 0.6
Mass [kg] 0.16 0.16 0.15

(Note-1): Simple Motion Module Setting Tool is included in MELSOFT GX Works2.