Mitsubishi Electric MELSEC iQ-R Series User manual

MELSEC iQ-R Simple Motion Module
User's Manual (Advanced Synchronous Control)
-RD77MS2 -RD77GF4
-RD77MS4 -RD77GF8
-RD77MS8 -RD77GF16
-RD77MS16 -RD77GF32

1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using MELSEC iQ-R series programmable controllers, please read the manuals for the product and the relevant
manuals introduced in those manuals carefully, and pay full attention to safety to handle the product correctly. If the equipment
is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
The precautions given in this manual are concerned with this product only. For the safety precautions of the programmable
controller system, refer to the MELSEC iQ-R Module Configuration Manual.
In this manual, the safety precautions are classified into two levels: " WARNING" and " CAUTION".
Under some circumstances, failure to observe the precautions given under " CAUTION" may lead to serious
consequences.
Observe the precautions of both levels because they are important for personal and system safety.
Make sure that the end users read this manual and then keep the manual in a safe place for future reference.
[Design Precautions]
WARNING
●Configure safety circuits external to the programmable controller to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the programmable controller.
Failure to do so may result in an accident due to an incorrect output or malfunction.
(1) Emergency stop circuits, protection circuits, and protective interlock circuits for conflicting
operations (such as forward/reverse rotations or upper/lower limit positioning) must be configured
external to the programmable controller.
(2) When the programmable controller detects an abnormal condition, it stops the operation and all
outputs are:
• Turned off if the overcurrent or overvoltage protection of the power supply module is activated.
• Held or turned off according to the parameter setting if the self-diagnostic function of the CPU
module detects an error such as a watchdog timer error.
(3) All outputs may be turned on if an error occurs in a part, such as an I/O control part, where the
CPU module cannot detect any error. To ensure safety operation in such a case, provide a safety
mechanism or a fail-safe circuit external to the programmable controller. For a fail-safe circuit
example, refer to "General Safety Requirements" in the MELSEC iQ-R Module Configuration
Manual.
(4) Outputs may remain on or off due to a failure of a component such as a relay and transistor in an
output circuit. Configure an external circuit for monitoring output signals that could cause a
serious accident.
●In an output circuit, when a load current exceeding the rated current or an overcurrent caused by a
load short-circuit flows for a long time, it may cause smoke and fire. To prevent this, configure an
external safety circuit, such as a fuse.
●Configure a circuit so that the programmable controller is turned on first and then the external power
supply. If the external power supply is turned on first, an accident may occur due to an incorrect output
or malfunction.
WARNING Indicates that incorrect handling may cause hazardous conditions, resulting in
death or severe injury.
CAUTION Indicates that incorrect handling may cause hazardous conditions, resulting in
minor or moderate injury or property damage.

2
[Design Precautions]
WARNING
●Configure a circuit so that the external power supply is turned off first and then the programmable
controller. If the programmable controller is turned off first, an accident may occur due to an incorrect
output or malfunction.
●For the operating status of each station after a communication failure, refer to manuals for the network
used. For the manuals, please consult your local Mitsubishi representative. Incorrect output or
malfunction due to a communication failure may result in an accident.
●When connecting an external device with a CPU module or intelligent function module to modify data
of a running programmable controller, configure an interlock circuit in the program to ensure that the
entire system will always operate safely. For other forms of control (such as program modification,
parameter change, forced output, or operating status change) of a running programmable controller,
read the relevant manuals carefully and ensure that the operation is safe before proceeding. Improper
operation may damage machines or cause accidents.
●Especially, when a remote programmable controller is controlled by an external device, immediate
action cannot be taken if a problem occurs in the programmable controller due to a communication
failure. To prevent this, configure an interlock circuit in the program, and determine corrective actions
to be taken between the external device and CPU module in case of a communication failure.
●Do not write any data to the "system area" and "write-protect area" of the buffer memory in the
module. Also, do not use any "use prohibited" signals as an output signal from the CPU module to
each module. Doing so may cause malfunction of the programmable controller system. For the
"system area", "write-protect area", and the "use prohibited" signals, refer to the user's manual for the
module used. For areas used for safety communications, they are protected from being written by
users, and thus safety communications failure caused by data writing does not occur.
●If a communication cable is disconnected, the network may be unstable, resulting in a communication
failure of multiple stations. Configure an interlock circuit in the program to ensure that the entire
system will always operate safely even if communications fail. Failure to do so may result in an
accident due to an incorrect output or malfunction. When safety communications are used, an
interlock by the safety station interlock function protects the system from an incorrect output or
malfunction.
●Configure safety circuits external to the programmable controller to ensure that the entire system
operates safely even when a fault occurs in the external power supply or the programmable controller.
Failure to do so may result in an accident due to an incorrect output or malfunction.
(1) Machine home position return is controlled by two kinds of data: a home position return direction
and a home position return speed. Deceleration starts when the proximity dog signal turns on. If
an incorrect home position return direction is set, motion control may continue without
deceleration. To prevent machine damage caused by this, configure an interlock circuit external to
the programmable controller.
(2) When the module detects an error, the motion slows down and stops or the motion rapidly stops,
depending on the stop group setting in parameter. Set the parameter to meet the specifications of
a positioning control system. In addition, set the home position return parameter and positioning
data within the specified setting range.
(3) Outputs may remain on or off, or become undefined due to a failure of a component such as an
insulation element and transistor in an output circuit, where the module cannot detect any error. In
a system that the incorrect output could cause a serious accident, configure an external circuit for
monitoring output signals.

3
[Design Precautions]
[Design Precautions]
[Security Precautions]
WARNING
●If safety standards (ex., robot safety rules, etc.,) apply to the system using the module, servo amplifier
and servo motor, make sure that the safety standards are satisfied.
●Construct a safety circuit externally of the module or servo amplifier if the abnormal operation of the
module or servo amplifier differs from the safety directive operation in the system.
●Do not remove the SSCNET cable while turning on the control circuit power supply of the module
and servo amplifier. Do not see directly the light generated from SSCNET connector of the module
or servo amplifier and the end of SSCNET cable. When the light gets into eyes, you may feel
something wrong with eyes. (The light source of SSCNET complies with class1 defined in JISC6802
or IEC60825-1.)
CAUTION
●Do not install the control lines or communication cables together with the main circuit lines or power
cables. Doing so may result in malfunction due to electromagnetic interference. Keep a distance of
100 mm or more between those cables.
●During control of an inductive load such as a lamp, heater, or solenoid valve, a large current
(approximately ten times greater than normal) may flow when the output is turned from off to on.
Therefore, use a module that has a sufficient current rating.
●After the CPU module is powered on or is reset, the time taken to enter the RUN status varies
depending on the system configuration, parameter settings, and/or program size. Design circuits so
that the entire system will always operate safely, regardless of the time.
●Do not power off the programmable controller or reset the CPU module while the settings are being
written. Doing so will make the data in the flash ROM and SD memory card undefined. The values
need to be set in the buffer memory and written to the flash ROM and SD memory card again. Doing
so also may cause malfunction or failure of the module.
●When changing the operating status of the CPU module from external devices (such as the remote
RUN/STOP functions), select "Do Not Open by Program" for "Opening Method" of "Module
Parameter". If "Open by Program" is selected, an execution of the remote STOP function causes the
communication line to close. Consequently, the CPU module cannot reopen the line, and external
devices cannot execute the remote RUN function.
WARNING
●To maintain the security (confidentiality, integrity, and availability) of the programmable controller and
the system against unauthorized access, denial-of-service (DoS) attacks, computer viruses, and other
cyberattacks from external devices via the network, take appropriate measures such as firewalls,
virtual private networks (VPNs), and antivirus solutions.

4
[Installation Precautions]
[Installation Precautions]
[Wiring Precautions]
WARNING
●Shut off the external power supply (all phases) used in the system before mounting or removing the
module. Failure to do so may result in electric shock or cause the module to fail or malfunction.
CAUTION
●Use the programmable controller in an environment that meets the general specifications in the Safety
Guidelines (IB-0800525). Failure to do so may result in electric shock, fire, malfunction, or damage to
or deterioration of the product.
●To mount a module, place the concave part(s) located at the bottom onto the guide(s) of the base unit,
and push in the module until the hook(s) located at the top snaps into place. Incorrect interconnection
may cause malfunction, failure, or drop of the module.
●To mount a module with no module fixing hook, place the concave part(s) located at the bottom onto
the guide(s) of the base unit, push in the module, and fix it with screw(s). Incorrect interconnection
may cause malfunction, failure, or drop of the module.
●When using the programmable controller in an environment of frequent vibrations, fix the module with
a screw.
●Tighten the screws within the specified torque range. Undertightening can cause drop of the
component or wire, short circuit, or malfunction. Overtightening can damage the screw and/or module,
resulting in drop, short circuit, or malfunction. For the specified torque range, refer to the MELSEC iQ-
R Module Configuration Manual.
●When using an extension cable, connect it to the extension cable connector of the base unit securely.
Check the connection for looseness. Poor contact may cause malfunction.
●When using an SD memory card, fully insert it into the SD memory card slot. Check that it is inserted
completely. Poor contact may cause malfunction.
●Securely insert an extended SRAM cassette or a battery-less option cassette into the cassette
connector of the CPU module. After insertion, close the cassette cover and check that the cassette is
inserted completely. Poor contact may cause malfunction.
●Beware that the module could be very hot while power is on and immediately after power-off.
●Do not directly touch any conductive parts and electronic components of the module, SD memory
card, extended SRAM cassette, battery-less option cassette, or connector. Doing so can cause
malfunction or failure of the module.
WARNING
●Shut off the external power supply (all phases) used in the system before installation and wiring.
Failure to do so may result in electric shock or cause the module to fail or malfunction.
●After installation and wiring, attach a blank cover module (RG60) to each empty slot and an included
extension connector protective cover to the unused extension cable connector before powering on the
system for operation. Failure to do so may result in electric shock.

5
[Wiring Precautions]
CAUTION
●Individually ground the FG and LG terminals of the programmable controller with a ground resistance
of 100 ohms or less. Failure to do so may result in electric shock or malfunction.
●Use applicable solderless terminals and tighten them within the specified torque range. If any spade
solderless terminal is used, it may be disconnected when the terminal screw comes loose, resulting in
failure.
●Check the rated voltage and signal layout before wiring to the module, and connect the cables
correctly. Connecting a power supply with a different voltage rating or incorrect wiring may cause fire
or failure.
●Connectors for external devices must be crimped or pressed with the tool specified by the
manufacturer, or must be correctly soldered. Incomplete connections may cause short circuit, fire, or
malfunction.
●Securely connect the connector to the module. Poor contact may cause malfunction.
●Do not install the control lines or communication cables together with the main circuit lines or power
cables. Doing so may result in malfunction due to noise. Keep a distance of 100 mm or more between
those cables.
●Place the cables in a duct or clamp them. If not, dangling cables may swing or inadvertently be pulled,
resulting in malfunction or damage to modules or cables.
In addition, the weight of the cables may put stress on modules in an environment of strong vibrations
and shocks.
Do not clamp the extension cables with the jacket stripped. Doing so may change the characteristics
of the cables, resulting in malfunction.
●Check the interface type and correctly connect the cable. Incorrect wiring (connecting the cable to an
incorrect interface) may cause failure of the module and external device.
●Tighten the terminal screws or connector screws within the specified torque range. Undertightening
can cause drop of the screw, short circuit, fire, or malfunction. Overtightening can damage the screw
and/or module, resulting in drop, short circuit, fire, or malfunction.
●When disconnecting the cable from the module, do not pull the cable by the cable part. For the cable
with connector, hold the connector part of the cable. For the cable connected to the terminal block,
loosen the terminal screw. Pulling the cable connected to the module may result in malfunction or
damage to the module or cable.
●Prevent foreign matter such as dust or wire chips from entering the module. Such foreign matter can
cause a fire, failure, or malfunction.
●When a protective film is attached to the top of the module, remove it before system operation. If not,
inadequate heat dissipation of the module may cause a fire, failure, or malfunction.
●Programmable controllers must be installed in control panels. Connect the main power supply to the
power supply module in the control panel through a relay terminal block. Wiring and replacement of a
power supply module must be performed by qualified maintenance personnel with knowledge of
protection against electric shock. For wiring, refer to the MELSEC iQ-R Module Configuration Manual.
●For Ethernet cables to be used in the system, select the ones that meet the specifications in the user's
manual for the module used. If not, normal data transmission is not guaranteed.

6
[Startup and Maintenance Precautions]
[Startup and Maintenance Precautions]
WARNING
●Do not touch any terminal while power is on. Doing so will cause electric shock or malfunction.
●Correctly connect the battery connector. Do not charge, disassemble, heat, short-circuit, solder, or
throw the battery into the fire. Also, do not expose it to liquid or strong shock. Doing so will cause the
battery to produce heat, explode, ignite, or leak, resulting in injury and fire.
●Shut off the external power supply (all phases) used in the system before cleaning the module or
retightening the terminal screws, connector screws, or module fixing screws. Failure to do so may
result in electric shock.
CAUTION
●When connecting an external device with a CPU module or intelligent function module to modify data
of a running programmable controller, configure an interlock circuit in the program to ensure that the
entire system will always operate safely. For other forms of control (such as program modification,
parameter change, forced output, or operating status change) of a running programmable controller,
read the relevant manuals carefully and ensure that the operation is safe before proceeding. Improper
operation may damage machines or cause accidents.
●Especially, when a remote programmable controller is controlled by an external device, immediate
action cannot be taken if a problem occurs in the programmable controller due to a communication
failure. To prevent this, configure an interlock circuit in the program, and determine corrective actions
to be taken between the external device and CPU module in case of a communication failure.
●Do not disassemble or modify the modules. Doing so may cause failure, malfunction, injury, or a fire.
●Use any radio communication device such as a cellular phone or PHS (Personal Handy-phone
System) 25 cm or more away in all directions from the programmable controller. Failure to do so may
cause malfunction.
●Shut off the external power supply (all phases) used in the system before mounting or removing the
module. Failure to do so may cause the module to fail or malfunction.
●Tighten the screws within the specified torque range. Undertightening can cause drop of the
component or wire, short circuit, or malfunction. Overtightening can damage the screw and/or module,
resulting in drop, short circuit, or malfunction.
●After the first use of the product, do not perform each of the following operations more than 50 times
(IEC 61131-2/JIS B 3502 compliant).
Exceeding the limit may cause malfunction.
• Mounting/removing the module to/from the base unit
• Inserting/removing the extended SRAM cassette or battery-less option cassette to/from the
CPU module
• Mounting/removing the terminal block to/from the module
• Connecting/disconnecting the extension cable to/from the base unit
●After the first use of the product, do not insert/remove the SD memory card to/from the CPU module
more than 500 times. Exceeding the limit may cause malfunction.
●Do not touch the metal terminals on the back side of the SD memory card. Doing so may cause
malfunction or failure of the module.

7
[Startup and Maintenance Precautions]
CAUTION
●Do not touch the integrated circuits on the circuit board of an extended SRAM cassette or a battery-
less option cassette. Doing so may cause malfunction or failure of the module.
●Do not drop or apply shock to the battery to be installed in the module. Doing so may damage the
battery, causing the battery fluid to leak inside the battery. If the battery is dropped or any shock is
applied to it, dispose of it without using.
●Startup and maintenance of a control panel must be performed by qualified maintenance personnel
with knowledge of protection against electric shock. Lock the control panel so that only qualified
maintenance personnel can operate it.
●Before handling the module, touch a conducting object such as a grounded metal to discharge the
static electricity from the human body. Wearing a grounded antistatic wrist strap is recommended.
Failure to discharge the static electricity may cause the module to fail or malfunction.
●After unpacking, eliminate static electricity from the module to prevent electrostatic discharge from
affecting the module. If an electrostatically charged module comes in contact with a grounded metal
object, a sudden electrostatic discharge of the module may cause failure. For details on how to
eliminate static electricity from the module, refer to the following.
Antistatic Precautions Before Using MELSEC iQ-R Series Products (FA-A-0368)
●Use a clean and dry cloth to wipe off dirt on the module.
●Before testing the operation, set a low speed value for the speed limit parameter so that the operation
can be stopped immediately upon occurrence of a hazardous condition.
●Confirm and adjust the program and each parameter before operation. Unpredictable movements
may occur depending on the machine.
●When using the absolute position system function, on starting up, and when the module or absolute
position motor has been replaced, always perform a home position return.
●Before starting the operation, confirm the brake function.
●Do not perform a megger test (insulation resistance measurement) during inspection.
●After maintenance and inspections are completed, confirm that the position detection of the absolute
position detection function is correct.
●Lock the control panel and prevent access to those who are not certified to handle or install electric
equipment.

8
[Operating Precautions]
[Computer Connection Precautions]
CAUTION
●When changing data and operating status, and modifying program of the running programmable
controller from an external device such as a personal computer connected to an intelligent function
module, read relevant manuals carefully and ensure the safety before operation. Incorrect change or
modification may cause system malfunction, damage to the machines, or accidents.
●Do not power off the programmable controller or reset the CPU module while the setting values in the
buffer memory are being written to the flash ROM in the module. Doing so will make the data in the
flash ROM and SD memory card undefined. The values need to be set in the buffer memory and
written to the flash ROM and SD memory card again. Doing so also may cause malfunction or failure
of the module.
●Note that when the reference axis speed is specified for interpolation operation, the speed of the
partner axis (2nd, 3rd, or 4th axis) may exceed the speed limit value.
●Do not go near the machine during test operations or during operations such as teaching. Doing so
may lead to injuries.
CAUTION
●When connecting a personal computer to a module having a USB interface, observe the following
precautions as well as the instructions described in the manual for the personal computer used.
Failure to do so may cause the module to fail.
(1) When the personal computer is AC-powered
When the personal computer has a 3-pin AC plug or an AC plug with a grounding wire, connect
the plug to a grounding receptacle or ground the grounding wire. Ground the personal computer
and the module with a ground resistance of 100 ohms or less.
When the personal computer has a 2-pin AC plug without a grounding wire, connect the computer
to the module by following the procedure below. For power supplied to the personal computer and
the module, using the same power source is recommended.
1. Unplug the personal computer from the AC receptacle.
2. Check that the personal computer is unplugged. Then, connect the personal computer to the
module with a USB cable.
3. Plug the personal computer into the AC receptacle.
(2) When the personal computer is battery-powered
The personal computer can be connected to the module without taking specific measures.
For details, refer to the following.
Cautions When Using Mitsubishi Programmable Controllers or GOTs Connected to a Personal
Computer With the RS-232/USB Interface (FA-A-0298)
When the USB cable used is the GT09-C30USB-5P manufactured by Mitsubishi Electric, specific
measures are not required to connect the AC-powered personal computer to the module. However,
note that the signal ground (SG) is common for the module and its USB interface. Therefore, if an SG
potential difference occurs between the module and the connected devices, it causes failures of the
module and the connected devices.

9
[Disposal Precautions]
[Transportation Precautions]
CAUTION
●When disposing of this product, treat it as industrial waste.
●When disposing of batteries, separate them from other wastes according to the local regulations. For
details on battery regulations in EU member states, refer to the MELSEC iQ-R Module Configuration
Manual.
CAUTION
●When transporting lithium batteries, follow the transportation regulations. For details on the regulated
models, refer to the MELSEC iQ-R Module Configuration Manual.
●The halogens (such as fluorine, chlorine, bromine, and iodine), which are contained in a fumigant
used for disinfection and pest control of wood packaging materials, may cause failure of the product.
Prevent the entry of fumigant residues into the product or consider other methods (such as heat
treatment) instead of fumigation. The disinfection and pest control measures must be applied to
unprocessed raw wood.

10
INTRODUCTION
Thank you for purchasing the Mitsubishi Electric MELSEC iQ-R series programmable controllers.
This manual describes the functions and programming of the relevant products listed below. Before using this product, please
read this manual and the relevant manuals carefully and develop familiarity with the functions and performance of the
MELSEC iQ-R series programmable controller to handle the product correctly.
When applying the program examples provided in this manual to an actual system, ensure the applicability and confirm that it
will not cause system control problems.
Please make sure that the end users read this manual.
Relevant products
RD77MS2, RD77MS4, RD77MS8, RD77MS16
RD77GF4, RD77GF8, RD77GF16, RD77GF32
Symbols used in this manual are shown below.
A serial No. is inserted in the "**" mark.
• [Pr.**]: Symbols indicating positioning parameter or home position return parameter items
• [Da.**]: Symbols indicating positioning data or block start data items
• [Md.**]: Symbols indicating monitor data items
• [Cd.**]: Symbols indicating control data items
• [RD77MS]: Symbols indicating that it corresponds to only RD77MS
• [RD77GF]: Symbols indicating that it corresponds to only RD77GF
COMPLIANCE WITH EMC AND LOW VOLTAGE
DIRECTIVES
Method of ensuring compliance
To ensure that Mitsubishi programmable controllers maintain EMC and Low Voltage Directives when incorporated into other
machinery or equipment, certain measures may be necessary. Please refer to one of the following manuals.
MELSEC iQ-R Module Configuration Manual
Safety Guidelines (IB-0800525)
The CE mark on the side of the programmable controller indicates compliance with EMC and Low Voltage Directives.
Additional measures
To ensure that this product maintains EMC and Low Voltage Directives, please refer to one of the following manuals.
MELSEC iQ-R Module Configuration Manual
Safety Guidelines (IB-0800525)

11
CONTENTS
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
COMPLIANCE WITH EMC AND LOW VOLTAGE DIRECTIVES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
CHAPTER 1 OUTLINE OF ADVANCED SYNCHRONOUS CONTROL 15
1.1 Outline of Synchronous Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1.2 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
1.3 Operation Method of Synchronous Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Synchronous control execution procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Starting/ending for synchronous control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Stop operation of output axis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CHAPTER 2 INPUT AXIS MODULE 28
2.1 Servo Input Axis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Overview of servo input axis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Servo input axis parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Servo input axis monitor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2.2 Synchronous Encoder Axis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Overview of synchronous encoder axis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Setting method for synchronous encoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Synchronous encoder axis parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Synchronous encoder axis parameters via link device [RD77GF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Synchronous encoder axis control data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Synchronous encoder axis monitor data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
CHAPTER 3 CAM FUNCTION 63
3.1 Control Details for Cam Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
3.2 Create Cam Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Memory configuration of cam data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Cam data operation function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Cam auto-generation function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
CHAPTER 4 ADVANCED SYNCHRONOUS CONTROL 92
4.1 Main Shaft Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Overview of main shaft module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Main shaft parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Main shaft clutch parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Main shaft clutch control data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
4.2 Auxiliary Shaft Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Overview of auxiliary shaft module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Auxiliary shaft parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Auxiliary shaft clutch parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104
Auxiliary shaft clutch control data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
4.3 Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Overview of clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Control method for clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

12
Smoothing method for clutch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Use example of clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
4.4 Speed Change Gear Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Overview of speed change gear module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Speed change gear parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
4.5 Output Axis Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Overview of output axis module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Output axis parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
4.6 Synchronous Control Change Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Overview of synchronous control change function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Synchronous control change control data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
4.7 Synchronous Control Monitor Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
4.8 Phase Compensation Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
4.9 Output Axis Sub Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143
CHAPTER 5 ADVANCED SYNCHRONOUS CONTROL INITIAL POSITION 144
5.1 Synchronous Control Initial Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
5.2 Synchronous Control Initial Position Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148
5.3 Cam Axis Position Restoration Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Cam axis position value per cycle restoration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Cam reference position restoration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Cam axis command position value restoration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
5.4 Synchronous Control Analysis Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
5.5 Cam Position Calculation Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Cam position calculation control data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164
Cam position calculation monitor data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
5.6 Method to Restart Synchronous Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
APPENDICES 172
Appendix 1 List of Buffer Memory Addresses (for Synchronous Control). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Appendix 2 Sample Program of Synchronous Control of the RD77MS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
INDEX 188
REVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .191
INFORMATION AND SERVICES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192
TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .192

13
RELEVANT MANUALS
This manual does not include information on the module function blocks.
For details, refer to the Function Block Reference for the module used.
e-Manual refers to the Mitsubishi Electric FA electronic book manuals that can be browsed using a dedicated
tool.
e-Manual has the following features:
• Required information can be cross-searched in multiple manuals.
• Other manuals can be accessed from the links in the manual.
• The hardware specifications of each part can be found from the product figures.
• Pages that users often browse can be bookmarked.
• Sample programs can be copied to an engineering tool.
Manual name [manual number] Description Available form
MELSEC iQ-R Simple Motion Module User's Manual
(Advanced Synchronous Control)
[IB-0300249ENG] (This manual)
Functions and programming for the synchronous control of the
Simple Motion module
Print book
e-Manual
PDF
MELSEC iQ-R Simple Motion Module User's Manual
(Startup)
[IB-0300245ENG]
Specifications, procedures before operation, system
configuration, wiring, and operation examples of the Simple
Motion module
Print book
e-Manual
PDF
MELSEC iQ-R Simple Motion Module User's Manual
(Application)
[IB-0300247ENG]
Functions, input/output signals, buffer memory, parameter
settings, programming, and troubleshooting of the Simple
Motion module
Print book
e-Manual
PDF
MELSEC iQ-R Simple Motion Module User's Manual
(Network)
[IB-0300307ENG]
Functions, parameter settings, troubleshooting, and buffer
memory of CC-Link IE Field Network
Print book
e-Manual
PDF

14
TERMS
Unless otherwise specified, this manual uses the following terms.
*1 SSCNET: Servo System Controller NETwork
Term Description
2-axis module A generic term for RD77MS2
4-axis module A generic term for RD77MS4
8-axis module A generic term for RD77MS8
16-axis module A generic term for RD77MS16
32-axis module A generic term for RD77GF32
Axis Another term for a servo amplifier
Buffer memory A memory in an intelligent function module, where data (such as setting values and monitoring values) are
stored. When using the CPU module, the memory is indicated for storing data (such as setting values and
monitored values) of the Ethernet function and data used for data communication of the multiple CPU function.
CC-Link IE Field Network A high-speed and large-capacity open field network that is based on Ethernet (1000BASE-T)
CPU module The abbreviation for the MELSEC iQ-R series CPU module
Device A device (X, Y, M, D, or others) in a CPU module
Engineering tool A generic term for GX Works3 and MR Configurator2
Global label A label that is enabled for all program data when creating multiple program data in the project. There are two
types of global labels: module label that is automatically generated by GX Works3 and label that can be created
for the any of the specified devices.
GX Works3 The product name of the software package for the MELSEC programmable controllers
Intelligent function module A MELSEC iQ-R series module that has functions other than input and output, such as an A/D converter module
and D/A converter module
Label A label that represents a device in a given character string
Link device A device (RX, RY, RWr, or RWw) in a module on CC-Link IE Field Network
Link scan (link scan time) Time required for all the stations on the network to transmit data.The link scan time depends on data volume and
the number of transient transmission requests.
Module label A label that represents one of memory areas (I/O signals and buffer memory areas) specific to each module in a
given character string. GX Works3 automatically generates this label, which can be used as a global label.
MR Configurator2 The product name of the setup software for the servo amplifier
MR-J3(W)-B MR-J3-_B_(-RJ)/MR-J3W-_B Servo amplifier series
MR-J4(W)-B MR-J4-_B_(-RJ)/MR-J4W_-_B Servo amplifier series
MR-J4W2-B MR-J4W2-_B Servo amplifier series
MR-J4-B-RJ MR-J4-_B_-RJ Servo amplifier series
MR-J4-GF MR-J4-_GF_(-RJ) Servo amplifier series
MR-J4-GF-RJ MR-J4-_GF_-RJ Servo amplifier series
MR-J5(W)-B MR-J5-_B_(-RJ)/MR-J5W_-_B Servo amplifier series
MR-J5W2-B MR-J5W2-_B Servo amplifier series
MR-J5-B-RJ MR-J5-_B_-RJ Servo amplifier series
MR-JE-B(F) MR-JE-_B/MR-JE-_BF Servo amplifier series
RD77GF Another term for the MELSEC iQ-R series Simple Motion module (compatible with CC-Link IE Field Network)
RD77MS Another term for the MELSEC iQ-R series Simple Motion module (compatible with SSCNET/H)
Remote input (RX) Bit data input from a slave station to the master station (For some areas in a local station, data are input in the
opposite direction.)
Remote output (RY) Bit data output from the master station to a slave station (For some areas in a local station, data are output in the
opposite direction.)
Remote register (RWr) Word data input from a slave station to the master station (For some areas in a local station, data are input in the
opposite direction.)
Remote register (RWw) Word data output from the master station to a slave station (For some areas in a local station, data are output in
the opposite direction.)
Servo amplifier A generic term for a drive unit. Unless specified in particular, indicates the motor driver unit of the sequential
command method which is controlled by the Simple Motion module (belonging to own station).
Simple Motion module The abbreviation for the MELSEC iQ-R series Simple Motion module
SSCNET*1 High speed synchronous communication network between RD77MS and servo amplifier
SSCNET/H*1

1 OUTLINE OF ADVANCED SYNCHRONOUS CONTROL
1.1 Outline of Synchronous Control 15
1
1OUTLINE OF ADVANCED SYNCHRONOUS
CONTROL
The outline, specifications and the operation method of synchronous control using the Simple Motion module are explained in
this chapter.
This chapter helps to understand what can be done using the positioning system and which procedure to use for a specific
purpose.
There are restrictions in the function that can be used by the software of the Simple Motion module and the version of
engineering tool. For details, refer to "Restrictions by the version" in the following manual.
MELSEC iQ-R Simple Motion Module User's Manual (Application)
1.1 Outline of Synchronous Control
"Synchronous control" can be achieved using software instead of controlling mechanically with gear, shaft, speed change
gear or cam, etc.
"Synchronous control" synchronizes movement with the input axis (servo input axis or synchronous encoder axis), by setting
"the advanced synchronous control parameters" and starting synchronous control on each output axis.
Positioning data
Positioning control
Positioning start Synchronous control start Synchronous control start
Synchronous encoder axis
Servo input axis
*1
Synchronous parameter
Synchronous control start
It is possible to control without amplifier
by setting the virtual servo amplifier.
Cam data
Output axis
Speed
change
gear *2
Speed
change
gear *2
Speed
change
gear
Auxiliary
shaft axis Cam
Synchronous
encoder
Manual pulse generator/
Synchronous encoder input Simple Motion module
Synchronous
encoder axis
parameter
Servo input axis
parameter
Auxiliary
shaft
clutch
Servo
amplifier
Servo
motor
Servo
amplifier
Servo
motor
Servo
motor
Servo
motor
Servo
amplifier
Servo
amplifier
Auxiliary
shaft
gear
Main shaft
(sub input axis)
Main shaft
(main input axis)
Composite
main shaft gear
Main shaft gear
Main shaft
clutch
Composite
auxiliary shaft
gear
*2

16 1 OUTLINE OF ADVANCED SYNCHRONOUS CONTROL
1.1 Outline of Synchronous Control
*1 It is possible to drive the servo input axis except for the positioning control (home position return, manual control, speed-torque control,
synchronous control).
For details on the positioning control, the home position return, the manual control and the speed-torque control, refer to the following
manual.
MELSEC iQ-R Simple Motion Module User's Manual (Application)
*2 Speed change gear can be arranged on one of "Main shaft side", "Auxiliary shaft side" or "After composite auxiliary shaft gear".
List of synchronous control module
The module is used in synchronous control as follows.
• Input axis module can be set to one of servo input axis or synchronous encoder axis.
• Speed change gear can be arranged on one of main shaft side, auxiliary shaft side or after composite
auxiliary shaft gear.
• Set the movement amount of input axis module as large as possible to prevent the speed fluctuation of
output axis module in the synchronous control. If the movement amount of input axis module is small, the
speed fluctuation of output axis module may occur depending on the setting for advanced synchronous
parameter.
• The following items can be monitored in the "Synchronous Control Image" window using the Simple Motion
Module Setting Function; each synchronous control monitor data and the rotation direction of main shaft
main input axis, main shaft sub input axis, auxiliary shaft axis, and output axis (cam axis command position
value).
Synchronous parameter
Synchronous encoder
axis parameter
Synchronous encoder axis
Servo input axis
parameter
Servo input axis
Input axis module
Main shaft module
Output axis
module
Cam data
Speed change
gear module
Auxiliary shaft module
Main shaft
(main input axis)
Auxiliary
shaft
clutch
Auxiliary
shaft
gear
Main shaft
(sub input axis)
Main shaft
gear
Main shaft
clutch
Composite
auxiliary
shaft gear
Composite main
shaft gear
Output axis
Speed
change
gear
Auxiliary shaft axis
Cam

1 OUTLINE OF ADVANCED SYNCHRONOUS CONTROL
1.1 Outline of Synchronous Control 17
1
■Input axis
• Input axis module
■Output axis
• Main shaft module
Name Parts Function description Maximum number of usable Reference
per module per axis
2-axis
module
[RD77MS]
4-axis
module
8-axis
module
16-axis
module
32-axis
module
[RD77GF]
Servo input
axis
• Used to drive the input axis
with the position of the servo
motor controlled by the
Simple Motion module.
2 481632 Page 28
Servo Input
Axis
Synchronous
encoder axis
• Used to drive the
input axis with
input pulse from
the synchronous
encoder.
RD77MS 4 Page 35
Synchronous
Encoder Axis
RD77GF 481632
Name Parts Function description Maximum number of usable Reference
per module per axis
2-axis
module
[RD77MS]
4-axis
module
8-axis
module
16-axis
module
32-axis
module
[RD77GF]
Main shaft
main input
axis
• The input axis on the main
side of the main shaft module.
• The reference position on the
main shaft.
2 481632 1 Page 92 Main
Shaft Module
Main shaft
sub input
axis
• The input axis on the sub side
of the main shaft module.
• It is used to input the
compensation amount for the
position of the main shaft
main input axis.
2 481632 1 Page 92 Main
Shaft Module
Composite
main shaft
gear
• The composite movement
amount of the main shaft
main input axis and the main
shaft sub input axis are
transmitted to the main shaft
gear.
2 481632 1 Page 92 Main
Shaft Module
Main shaft
gear
• The converting movement
amount after composite main
shaft gear is transmitted by
the setting gear ratio.
2 481632 1 Page 92 Main
Shaft Module
Main shaft
clutch
• The movement amount of the
main shaft is transmitted by
the clutch ON/OFF.
2 481632 1 Page 92 Main
Shaft Module
Page 111
Clutch

18 1 OUTLINE OF ADVANCED SYNCHRONOUS CONTROL
1.1 Outline of Synchronous Control
• Auxiliary shaft module
• Speed change gear module
• Output axis module
■Cam data
Name Parts Function description Maximum number of usable Reference
per module per axis
2-axis
module
[RD77MS]
4-axis
module
8-axis
module
16-axis
module
32-axis
module
[RD77GF]
Auxiliary
shaft axis
• The input axis of the auxiliary
shaft module.
2 4 8 16 32 1 Page 102
Auxiliary
Shaft Module
Auxiliary
shaft gear
• The converting movement
amount of the auxiliary shaft
is transmitted by the setting
gear ratio.
2 4 8 16 32 1 Page 102
Auxiliary
Shaft Module
Auxiliary
shaft clutch
• The movement amount of the
auxiliary shaft is transmitted
by the clutch ON/OFF.
2 4 8 16 32 1 Page 102
Auxiliary
Shaft Module
Page 111
Clutch
Composite
auxiliary
shaft gear
• The composite movement
amount of the main shaft and
the auxiliary shaft are
transmitted.
2 4 8 16 32 1 Page 102
Auxiliary
Shaft Module
Name Parts Function description Maximum number of usable Reference
per module per axis
2-axis
module
[RD77MS]
4-axis
module
8-axis
module
16-axis
module
32-axis
module
[RD77GF]
Speed
change gear
• It is used to change the speed
by setting speed change ratio
during the operation.
2 4 8 16 32 1 Page 124
Speed
Change Gear
Module
Name Parts Function description Maximum number of usable Reference
per module per axis
2-axis
module
[RD77MS]
4-axis
module
8-axis
module
16-axis
module
32-axis
module
[RD77GF]
Output axis • The cam conversion is
processed based on the input
movement amount and the
setting cam data. The
command position value is
output as the command to the
servo amplifier.
2 4 8 16 32 1 Page 126
Output Axis
Module
Name Function description Maximum number of usable Reference
per module
Cam data • It controls the operation pattern of the output axis
(two-way operation and feed operation), which is
corresponding to the input movement amount of the
output axis module.
Up to 256 [RD77MS]
Up to 1024 [RD77GF]
Page 63 CAM FUNCTION