Home / Mitsubishi Electric (Factory Automation) / Mitsubishi MELSEC iQ-R Series – Motion/positioning / RD78G8 Mitsubishi MELSEC iQ-R Series Motion

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RD78G8 Mitsubishi MELSEC iQ-R Series Motion

MPN: RD78G8 · Brand: Mitsubishi Electric (Factory Automation)

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12-month warranty (new) · 3-month (used/refurbished)

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Quick facts

Availability	Confirmed on request
Category	Mitsubishi MELSEC iQ-R Series – Motion/positioning
Lifecycle	Active
Warranty	12-month (new) · 3-month (used/refurbished)

Shipping & availability

When can RD78G8 be shipped?

RD78G8 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up RD78G8 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for RD78G8 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for RD78G8, subject to availability and destination.

The Mitsubishi Electric RD78G8 is a motion in the MELSEC iQ-R Series. Maximum number of control axes: 8 axes, Minimum operation cycle: 62.5 μs, CC-Link IE TSN connection, Positioning control, synchronous control, speed control, torque control. Specifications and manuals below are Mitsubishi Electric's own data.

Specifications

Product

Series	MELSEC iQ-R Series
Category	Motion
Type	CC-Link IE TSN-compatible
Outline	Maximum number of control axes: 8 axes, Minimum operation cycle: 62.5 μs, CC-Link IE TSN connection, Positioning control, synchronous control, speed control, torque control

[Control specifications] Simple Motion mode

Number of control axes	Up to 8 axes
Operation cycle (operation cycle settings) *1	250 μs, 500 μs, 1000 μs, 2000 μs, 4000 μs
Interpolation function	Linear interpolation (up to 4 axes), 2-axis circular interpolation, helical interpolation (3 axes)
Control method	Positioning control, continuous path control, speed control, speed-torque control, synchronous control, continuous operation to torque control
Acceleration/deceleration processing	Trapezoidal acceleration/deceleration, S-curve acceleration/deceleration
Compensation function	Backlash compensation, electronic gear, near pass function
Synchronous control	Synchronous encoder input, command generation axis, cam, phase compensation, cam auto-generation
Control unit	mm, inch, degree, pulse
Positioning control method	Motion profile table
Number of positioning data	600 data (positioning data No. 1 to 600)/axis (Can be set with MELSOFT GX Works3 or a sequence program.)
Backup	Parameters, positioning data, and block start data can be saved on flash ROM (batteryless backup)
Home position return	Driver home position return *2
Positioning control	Linear interpolation control (up to 4 axes) *3 , fixed-pitch feed control (up to 4 axes), 2-axis circular interpolation (auxiliary point-specified, central point-specified), helical interpolation, speed control (up to 4 axes), speed-position switching control (INC mode, ABS mode), position-speed switching control (INC mode), current value change
Manual control	JOG operation, inching operation, manual pulse generator operation (up to 1 module)
Speed-torque control	Speed control not including position loop, torque control, continuous operation to torque control
Absolute position system	Provided (batteryless)
Synchronous encoder operation function	Up to the number of axes of the connected servo amplifiers (via a servo amplifier or a CPU *4 )
Speed limit	Speed limit value, JOG speed limit value
Torque limit function	Torque limit value same setting, torque limit value individual setting
Forced stop	Valid/invalid setting
Software stroke limit function	Movable range check with feed current value or with machine feed value
Hardware stroke limit function	Provided
Speed change	Provided
Acceleration/deceleration processing change	Acceleration/deceleration time
Torque change function	Provided
Torque limit value change	Provided
Target position change function	Speed to a target position address and a target position is changeable.
Override	0 to 300 %
Event history function	Provided
Amplifier-less operation function	Provided
M-code output function	Provided
Step function	Deceleration unit step, data No. unit step
Skip function	Via a PLC CPU or an external command signal
Parameter initialization function	Provided
External input signal setting function	Via a CPU (buffer memory) or a servo amplifier
Teaching function	Provided
Mark detection function	Continuous detection mode, specified number of detections mode, ring buffer mode
Mark detection function: Mark detection signal	Signals for the number of axes of the connected servo amplifiers
Mark detection function: Mark detection setting	16 settings
Optional data monitor function	Up to 4 points/axis
Functional safety	Safety communication (network connection), DI/O connection of the servo amplifier
Driver communication function	Provided *5
Inter-module synchronization	Provided
CC-Link IE TSN safety communication function	Provided
Digital oscilloscope function	Bit data: 16 channels, word data: 16 channels *6
Automatic return	Provided
Number of slots occupied	1
5 V DC internal current consumption [A]	1.93
Servo amplifier connection method	CC-Link IE TSN
CC-Link IE TSN Class	B
Number of occupied I/O points	32 points (I/O allocation: intelligent function module 32 points)
Maximum distance between stations [m]	CC-Link IE TSN: 100
PERIPHERAL I/F	Via a CPU module (USB, Ethernet)
Extended memory	SD/SDHC memory card
Mass [kg]	0.26
Exterior dimensions [mm]	106.0 (H) x 27.8 (W) x 110.0 (D)

[Control specifications] PLCopen ® Motion Control FB Mode

Number of control axes	Up to 8 axes
Operation cycle (operation cycle settings) *1	62.5 μs, 125 μs, 250 μs, 500 μs, 1000 μs, 2000 μs, 4000 μs, 8000 μs
Interpolation function	Linear interpolation (up to 4 axes), 2-axis circular interpolation
Control method	Positioning control, speed control, torque control, synchronous control, cam control
Acceleration/deceleration processing	Trapezoidal acceleration/deceleration, jerk acceleration/deceleration, acceleration/deceleration time fixed method
Compensation function	Driver unit conversion
Synchronous control	• Module: master axis, cam, gear • Master axis: real drive axis, virtual drive axis, real encoder axis, virtual encoder axis, virtual linked axis
Control unit	Unit character string and decimal digit can be defined by users. (The following are given units: mm, inch, degree, pulse)
Programming language	• PLC CPU: ladder diagram, function block diagram/ladder diagram, structured text language • Motion module: structured text language
Backup	Parameters and programs can be saved on a flash ROM (batteryless backup)
Home position return	Driver home position return *2
Positioning control	Linear interpolation control (up to 4 axes), 2-axis circular interpolation (border point-specified, central point-specified, radius-specified circular interpolation), speed control, current value change
Manual control	JOG operation
Direct control: Speed control	Speed control not including position loop, speed control including position loop
Direct control: Torque control	Torque control, continuous operation to torque control
Absolute position system	Provided (batteryless)
Speed limit	Speed command range
Torque limit function	Torque limit value (positive/negative direction)
Forced stop	Valid/invalid setting
Software stroke limit function	Movable range check with an address of the set position or the feed machine position.
Hardware stroke limit function	Provided
Speed change	Provided
Acceleration/deceleration processing change	Acceleration/deceleration, acceleration/deceleration time
Torque change function	Provided
Torque limit value change	Provided
Target position change function	Target position change, movement distance change
Override	0.00 to 10.00 (0 to 1000 %)
Event history function	Provided
Logging	Data logging, real-time monitor
Axis emulate (amplifier-less operation)	Provided
Touch probe (mark detection)	Provided
Monitoring of servo data	Cyclic transmission, transient transmission
Servo system recorder function	Provided
CC-Link IE TSN safety communication function	Provided
Inter-module synchronization	Provided
Number of module occupied slots	1
5 V DC internal current consumption [A]	1.93
Servo amplifier connection method	CC-Link IE TSN
CC-Link IE TSN Class	B
Number of occupied I/O points	32 points, 1 slot (I/O assignment: 32 points)
Maximum distance between stations [m]	CC-Link IE TSN: 100
PERIPHERAL I/F	Via a CPU module (USB, Ethernet)
Extended memory	SD/SDHC memory card
Memory capacity: Built-in memory	16 M bytes
Memory capacity: SD memory card	Up to 32 G bytes
Mass [kg]	0.26
Exterior dimensions [mm]	106.0 (H) x 27.8 (W) x 110.0 (D)

Downloads & documentation

Official documents from Mitsubishi Electric (Factory Automation), downloaded directly from the manufacturer.

Data sheets & manuals

MELSEC iQ-R Motion Module User's Manual (Startup) (IB-0300406ENG-N)	PDF · 45.08MB
MELSEC iQ-R Motion Module User's Manual (Application) (IB-0300411ENG-P)	PDF · 13.73MB
MELSEC iQ-R Motion Module User's Manual (Application for Simple Motion Mode) (IB-0300572ENG-K)	PDF · 14.11MB
MELSEC iQ-R Motion Module User's Manual (Network) (IB-0300426ENG-N)	PDF · 47.18MB
MELSEC iQ-R Motion Module User's Manual (Advanced Synchronous Control for Simple Motion Mode) (IB-0300575ENG-G)	PDF · 3.41MB
MELSEC iQ-R Programming Manual (Motion Control Function Blocks) (IB-0300533ENG-M)	PDF · 10.05MB
MELSEC iQ-R Programming Manual (Motion Module Instructions, Standard Functions/Function Blocks) (IB-0300431ENG-H)	PDF · 2.03MB
MELSEC iQ-R Motion Module (Simple Motion Mode) Function Block Reference (BCN-B62005-1040ENG-C)	PDF · 0.76MB
RD78G(H) Before Using the Product (BCN-B62008-421E-E)	PDF · 0.13MB