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.
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals carefully and pay full attention to safety to handle
the product correctly.
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.
● For the operating status of each station after a communication failure, refer to manuals relevant to the
network. Incorrect output or malfunction due to a communication failure may result in an accident.
1
[Design Precautions]
WARNING
● 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.
● 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.
● 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 OPR (Original Point Return) is controlled by two kinds of data: an OPR direction and an
OPR speed. Deceleration starts when the near-point dog signal turns on. If an incorrect OPR
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 positioning module detects an error, the motion slows down and stops or the motion
suddenly stops, depending on the stop group setting in parameter. Set the parameters to meet the
specifications of the positioning control system used. In addition, set the OPR parameters 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 positioning module cannot detect
any error. In a system where the incorrect outputs could cause a serious accident, configure an
external circuit for monitoring output signals.
● An absolute position restoration by the positioning module may turn off the servo-on signal (servo off)
for approximately 60ms + scan time, and the motor may run unexpectedly. If this causes a problem,
provide an electromagnetic brake to lock the motor during absolute position restoration.
2
[Design Precautions]
CAUTION
● Do not install the control lines or communication cables together with the main circuit lines or power
cables. Keep a distance of 100mm or more between them. Failure to do so may result in malfunction
due to noise.
● 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.
[Security Precautions]
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.
[Installation 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.
3
[Installation Precautions]
CAUTION
● Use the programmable controller in an environment that meets the general specifications in the Safety
Guidelines included with the base unit. 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.
● 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 screw,
short circuit, or malfunction. Overtightening can damage the screw and/or module, resulting in drop,
short circuit, or malfunction.
● 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.
● 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.
[Wiring Precautions]
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 the included terminal cover to the module before turning it on for
operation. Failure to do so may result in electric shock.
4
[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. Keep a distance of 100mm or more between them. Failure to do so may result in malfunction
due to noise.
● 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. Doing so may change the characteristics of the cables, resulting in malfunction.
Do not clamp the extension cables with the jacket stripped.
● 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.
● A protective film is attached to the top of the module to prevent foreign matter, such as wire chips,
from entering the module during wiring. Do not remove the film during wiring. Remove it for heat
dissipation before system operation.
● 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.
5
[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.
6
[Startup and Maintenance Precautions]
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) more than 25cm 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
● 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.
● Do not touch the integrated circuits on the circuit board of an extended SRAM cassette or a batteryless option cassette.
● 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. Failure to do so may cause the module to fail or malfunction.
● 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.
7
[Operating 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 can 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.
[Disposal 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.
[Transportation Precautions]
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.
8
CONDITIONS OF USE FOR THE PRODUCT
(1) Mitsubishi programmable controller ("the PRODUCT") shall be used in conditions;
i) where any problem, fault or failure occurring in the PRODUCT, if any, shall not lead to any major or serious accident;
and
ii) where the backup and fail-safe function are systematically or automatically provided outside of the PRODUCT for the
case of any problem, fault or failure occurring in the PRODUCT.
(2) The PRODUCT has been designed and manufactured for the purpose of being used in general industries.
MITSUBISHI SHALL HAVE NO RESPONSIBILITY OR LIABILITY (INCLUDING, BUT NOT LIMITED TO ANY AND ALL
RESPONSIBILITY OR LIABILITY BASED ON CONTRACT, WARRANTY, TORT, PRODUCT LIABILITY) FOR ANY
INJURY OR DEATH TO PERSONS OR LOSS OR DAMAGE TO PROPERTY CAUSED BY the PRODUCT THAT ARE
OPERATED OR USED IN APPLICATION NOT INTENDED OR EXCLUDED BY INSTRUCTIONS, PRECAUTIONS, OR
WARNING CONTAINED IN MITSUBISHI'S USER, INSTRUCTION AND/OR SAFETY MANUALS, TECHNICAL
BULLETINS AND GUIDELINES FOR the PRODUCT.
("Prohibited Application")
Prohibited Applications include, but not limited to, the use of the PRODUCT in;
• Nuclear Power Plants and any other power plants operated by Power companies, and/or any other cases in which the
public could be affected if any problem or fault occurs in the PRODUCT.
• Railway companies or Public service purposes, and/or any other cases in which establishment of a special quality
assurance system is required by the Purchaser or End User.
• Aircraft or Aerospace, Medical applications, Train equipment, transport equipment such as Elevator and Escalator,
Incineration and Fuel devices, Vehicles, Manned transportation, Equipment for Recreation and Amusement, and
Safety devices, handling of Nuclear or Hazardous Materials or Chemicals, Mining and Drilling, and/or other
applications where there is a significant risk of injury to the public or property.
Notwithstanding the above restrictions, Mitsubishi may in its sole discretion, authorize use of the PRODUCT in one or
more of the Prohibited Applications, provided that the usage of the PRODUCT is limited only for the specific
applications agreed to by Mitsubishi and provided further that no special quality assurance or fail-safe, redundant or
other safety features which exceed the general specifications of the PRODUCTs are required. For details, please
contact the Mitsubishi representative in your region.
(3) Mitsubishi shall have no responsibility or liability for any problems involving programmable controller trouble and system
trouble caused by DoS attacks, unauthorized access, computer viruses, and other cyberattacks.
9
INTRODUCTION
Thank you for purchasing the Mitsubishi Electric MELSEC iQ-R series programmable controllers.
This manual describes the functions, programming, and troubleshooting 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
RD75P2, RD75P4, RD75D2, RD75D4
In this manual, buffer memory areas are classified into four groups using the following symbols. Each area
name is common to axis 1 to 4.
• [Pr.**]: Positioning parameter and OPR parameter
• [Da.**]: Positioning data and block start data
• [Md.**]: Monitor data
• [Cd.**]: Control data
Unless otherwise specified, this manual describes dedicated instructions using G(P).**** instructions. When
using Z(P).**** instructions, regard G(P).**** as Z(P).****. Applicable devices differ between G(P).****
instructions and Z(P).**** instructions. Check the devices in the following manual.
MELSEC iQ-R Programming Manual (Module Dedicated Instructions)
This manual does not include information on the module function blocks.
For details, refer to the Function Block Reference for the module used.
Functions, parameter settings, I/O signals, buffer memory,
programming, and troubleshooting of the positioning module
Common information on the hardware configuration of all modules,
overview of each system configuration, and specifications of the
power supply module, base unit, SD memory card, and battery.
System configuration, specifications, procedures before operation,
wiring, and operation examples of the positioning module
Dedicated instructions for the intelligent function modulese-Manual
Specifications, functions, and I/O labels of the positioning module
FBs
System configuration, parameter settings, and online operations of
GX Works3
The online module change, which allows a module to be changed
without stopping the system for MELSEC iQ-R series
programmable controllers
Print book
e-Manual
PDF
Print book
e-Manual
PDF
Print book
e-Manual
PDF
PDF
e-Manual
PDF
e-Manual
PDF
Print book
e-Manual
PDF
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.
TERMS
Unless otherwise specified, this manual uses the following terms.
TermDescription
Q series-compatible modeA mode in which the module operates with the buffer memory map converted to the equivalent one of the
MELSEC Q series
Engineering toolA tool used for setting up programmable controllers, programming, debugging, and maintenance.
Global labelA label that is valid for all the program data when multiple program data are created in the project.
Quick start modeA mode where the module operates with the start time of 0.3ms. Unless otherwise specified, the functions
Drive unit (servo amplifier)A unit that amplifies pulses that are output from the positioning module to control a motor. The unit is provided
Module labelA label that represents one of memory areas (I/O signals and buffer memory areas) specific to each module in a
There are two types of global label: a module specific label (module label), which is generated automatically by
GX Works3, and an optional label, which can be created for any specified device.
described in this manual are for when quick start mode is set.
with a servomotor or stepping motor. It is also called a servo amplifier.
given character string. For the module used, GX Works3 automatically generates this label, which can be used
as a global label.
18
GENERIC TERMS AND ABBREVIATIONS
Unless otherwise specified, this manual uses the following generic terms and abbreviations.
Generic term/abbreviationDescription
RD75An abbreviation for the MELSEC iQ-R series positioning module
RD75PA generic term for the positioning module RD75P2 and RD75P4
RD75DA generic term for the positioning module RD75D2 and RD75D4
Remote head moduleAn abbreviation for the RJ72GF15-T2 CC-Link IE Field Network remote head module
19
1STARTING AND STOPPING
This chapter describes how to start and stop positioning control operations with the RD75.
1.1Starting
The RD75 starts the positioning control when a start trigger, specific to the control, is turned on. The following table lists the
start signals by control type. This section describes starting with Positioning start signal [Y10, Y11, Y12, Y13] and an external
command signal.
Control detailsStart trigger
Major positioning control• Turn on Positioning start signal [Y10, Y11, Y12, Y13].
Advanced positioning control
OPR control
Manual controlJOG operationTurn on Forward run JOG start signal [Y8, YA, YC, YE] or Reverse run JOG start signal [Y9, YB, YD,
Inching operation
Manual pulse
generator operation
For the controls other than the manual controls, any one of the following start modes can be selected.
The target position for a control can be specified using positioning data, Block start data, and condition data. Available data
depends on the selected start mode.
• Execute the GP.PSTRT instruction.
• Turn on an external command signal (CHG).
YF].
Manipulate a manual pulse generator.
Start condition
Satisfy the following conditions to start a program. In addition, set the required conditions in the program to prevent an
operation from starting if the conditions are not satisfied.
Signal nameSignal statusDevice
Axis 1 Axis 2 Axis 3Axis 4
I/O signalsPLC READY signalONThe CPU module is ready.Y0
RD75 READY signalONRD75 READY signalX0
Module access flag
Axis stop signalOFFAxis stop signal is off.Y4Y5Y6Y7
M code ON signalOFFM code ON signal is off.X4X5X6X7
Error detection signalOFFNo error has been detected.X8X9XAXB
BUSY signalOFFBUSY signal is off.XCXDXEXF
Start complete signalOFFStart complete signal is off.X10X11X12X13
External signalDrive unit READY signal (READY)ONThe drive unit is ready.
Stop signal (STOP)OFFStop signal is off.
Upper limit signal (FLS)ONThe current position is within the limit.
Lower limit signal (RLS)ONThe current position is within the limit.
*1 The interlock must be provided so that the buffer memory is accessed after Module access flag [X1] turns on. When no interlock is
provided, the buffer memory may be accessed while the module parameter and module extension parameter that are sent from the CPU
module are updated. If the buffer memory is accessed during the update, an unexpected value may be read or written.
*1
ONThe RD75 buffer memory can be
accessed.
X1
20
1 STARTING AND STOPPING
1.1 Starting
Starting with Positioning start signal [Y10, Y11, Y12, Y13]
t
OFF
ON
OFF
ON
OFF
ON
OFF
ON
V
Positioning start signal
[Y10, Y11, Y12, Y13]
Start complete signal
[X10, X11, X12, X13]
BUSY signal
[XC, XD, XE, XF]
Positioning complete signal
[X14, X15, X16, X17]
Positioning
Dwell time
This section describes operations started with Positioning start signal [Y10, Y11, Y12, Y13].
• When Positioning start signal [Y10, Y11, Y12, Y13] is turned on, Start complete signal [X10, X11, X12, X13] and BUSY
signal [XC, XD, XE, XF] turn on, and the positioning operation starts. The on state of BUSY signal [XC, XD, XE, XF]
indicates that the corresponding axis is in operation.
• When Positioning start signal [Y10, Y11, Y12, Y13] is turned off, Start complete signal [X10, X11, X12, X13] turns off. If
Positioning start signal [Y10, Y11, Y12, Y13] remains on even after the positioning is completed, Start complete signal [X10,
X11, X12, X13] also remains on.
• If Positioning start signal is turned on again while BUSY signal [XC, XD, XE, XF] is on, Start during operation (Warning
code: 0900H) occurs.
• The operation performed after the completion of the positioning operation depends on whether or not the next positioning
control is set.
Presence or absence of the next
positioning control
When the next positioning control is performed• If [Da.9] Dwell time is set, the RD75 waits for the set time to elapse, and the positioning will be completed.
When the next positioning control is not
performed
Processing
• When the positioning has been completed, BUSY signal [XC, XD, XE, XF] turns off and Positioning
complete signal [X14, X15, X16, X17] turns on. However, when the speed control has been used or the
ON time of Positioning complete signal is 0, Positioning complete signal [X14, X15, X16, X17] does not
turn on.
• When the time set in [Pr.40] Positioning complete signal output time elapses, Positioning complete signal
[X14, X15, X16, X17] turns off.
• If [Da.9] Dwell time is set, the RD75 waits for the set time to elapse.
• When the time set in [Da.9] Dwell time elapses, the next positioning control starts.
1
■Time chart for starting
Even when the positioning control of a movement amount 0 is performed, BUSY signal [XC, XD, XE, XF] turns
on. However, since the ON time of the signal is short, the ON state of the signal may not be detected in the
program. (The on state of Start complete signal [X10, X11, X12, X13], Positioning complete signal [X14, X15,
X16, X17], and M code ON signal [X4, X5, X6, X7] can be detected in the program.)
1 STARTING AND STOPPING
1.1 Starting
21
Starting by inputting an external command signal (CHG)
Cd.3
Pr.42
Cd.8
1
0
01
[Y10]
[Y0]
[X0]
[X10]
[XC]
[X14]
[X8]
t
v
1(00)
Operation pattern
Positioning data No.
Positioning start signal
Positioning start No.
External command signal
(externally)
External command
function selection
External command
valid
PLC READY signal
RD75 READY signal
Start complete signal
BUSY signal
Positioning complete
signal
Error detection signal
Dwell time
When the positioning control is started by inputting an external command signal (CHG), the start command can be directly
input to the RD75. This method eliminates the variation time equivalent to one scan time of the CPU module. Use the start
command when an operation is required to be started as soon as possible, or when the starting variation time is to be
suppressed.
■Starting method
To start the positioning with the external command signal, set [Pr.42] External command function selection beforehand, and
validate [Cd.8] External command valid using a program. After setting those two areas, turn on an external command signal
Global label, local labelDefine the global label or local label as follows. Setting Assign (Device/Label) for labels is not necessary because the unused
internal relay and data device are automatically assigned to the labels.
■For External command signal (CHG)
Positioning can be started by setting 0: Start with external command in [Pr.42] External command function selection and
inputting External command signal (CHG) after executing the following program.
Page 509 External command function valid setting program
24
1 STARTING AND STOPPING
1.1 Starting
Quick start
Positioning controls can be started quickly by analyzing in advance the positioning data executed immediately after the
current operation to prevent the analysis time affecting the start. Positioning data for the major positioning controls can be
started in this mode.
By using an external command signal as a start trigger, positioning controls can be started bypassing a
program, which means that the operation is quickly started without being affected by the execution time of the
program.
Starting method
After setting positioning data, set [Cd.43] Analysis mode setting to 1: Pre-analysis mode and input a start trigger signal while
[Md.61] Analysis complete flag is 1: Analysis completed. The following table shows the start triggers used in this mode.
Start trigger nameStarting method (Start trigger)Positioning data to be started
Positioning start signalTurning off and on Positioning start signal [Y10, Y11, Y12,
External command
signal
Depending on the start timing of the positioning data analysis, a start trigger used is determined. Even if the settings are
changed after the start of the positioning data analysis, the changed settings are not valid. Therefore, when the following
settings are configured, an external command signal (CHG) is used as a start trigger.
• [Pr.42] External command function selection is set to 0: Start with external command.
• [Cd.8] External command valid is set to 1: External command valid.
Otherwise, Positioning start signal [Y10, Y11, Y12, Y13] can be used as a start trigger.
Y13]
Turning off and on an external command signal (CHG)Starts the positioning data specified in [Cd.3] Positioning start No.
Starts the positioning data specified in [Cd.3] Positioning start No.
1
1 STARTING AND STOPPING
1.1 Starting
25
Control details
t
t2
t1
ON
OFF
v
Md.26
Cd.43
Md.61
0: Normal analysis mode1: Pre-analysis mode
0: Analysis not completed1: Analysis completed
Waiting for a start trigger
0: Analysis not completed
Start trigger
BUSY signal [XC, XD, XE, XF]
Operation by a user
Operation by the system
Analysis mode setting
Analysis complete flag
Axis operation status
StandbyAnalyzingPosition control
■Length of time before the positioning starts
While [Cd.43] Analysis mode setting is 1: Pre-analysis mode, the positioning data specified in [Cd.3] Positioning start No. is
analyzed. The following shows the start timing of positioning data analysis.
• When the analysis mode is changed to the pre-analysis mode (Timing when the setting of [Cd.43] Analysis mode setting is
changed to 1: Pre-analysis mode)
• When the positioning start No. is changed after the analysis of the positioning data has been completed (Timing when the
setting of [Cd.3] Positioning start No. is changed while [Md.61] Analysis complete flag is 1: Analysis completed)
• When the positioning operation is completed and [Md.26] Axis operation status turns to 0: Standby However, When M code
ON signal [X4, X5, X6, X7] is on, the analysis of the positioning data will not start until M code ON signal [X4, X5, X6, X7]
turns off.
Once the analysis of the positioning data is completed, [Md.61] Analysis complete flag turns to 1: Analysis completed. The
quick start is executed by inputting a start trigger while [Md.61] Analysis complete flag is 1: Analysis completed. After the
quick start is executed, [Md.61] Analysis complete flag turns to 0: Analysis not completed.
The pre-analysis mode is changed to the normal analysis mode not only by setting [Cd.43] Analysis mode setting to 0: Normal
analysis mode, but also by the following factors. When the setting of [Cd.43] Analysis mode setting is changed to 0: Normal
analysis mode, the positioning data which has already been analyzed is cleared. (In the interpolation control, the positioning
data is cleared when the reference axis enters the normal analysis mode.)
• When an error is detected
• When PLC READY signal [Y0] is turned on and off
• When the positioning operation is stopped by a stop signal
If any of the three causes described above occurs, the reference axis or interpolation axis enters the normal analysis mode in
the interpolation control.
t1t2
0.88 to 1.77msExternal command signal: 20s
The shortest time between the completion of the positioning control and the starting of the next positioning control is t1 + t2.
26
1 STARTING AND STOPPING
1.1 Starting
Positioning start signal: 8s
■Executing the quick start repeatedly
t
t2
t1
v
Cd.3
Md.26
Cd.43
Md.61
1: Pre-analysis mode
0: Analysis not completed1: Analysis completed
Waiting for a start trigger
Positioning data No. used for positioning control 2
0: Analysis not completed
Start trigger
Positioning control 1
Positioning control 2
BUSY signal [XC, XD, XE, XF]
Operation by a user
Operation by the system
Analysis mode setting
Analysis complete flag
Positioning start No.
Axis operation status
StandbyPosition controlAnalyzingPosition control
t1t1
Md.61
Cd.3
Md.26
Cd.43
Axis operation status
Analysis mode setting
Analysis complete flag
Positioning start No.
Positioning data No.APositioning data No.B
AnalyzingAnalyzing
1: Pre-analysis mode
Standby
0: Normal
analysis mode
1: Analysis completed0: Analysis not completed1: Analysis completed
0: Analysis not
completed
The quick start can be executed repeatedly by remaining [Cd.43] Analysis mode setting to 1: Pre-analysis mode.
When [Cd.3] Positioning start No. is set to the positioning data No. used for the positioning control 2 during the operation of
the positioning control 1, the operation is performed as follows.
• The positioning by the positioning control 1 is completed and [Md.26] Axis operation status turns to 0: Standby.
• When [Md.26] Axis operation status turns to 0: Standby, the positioning data specified in [Cd.3] Positioning start No. starts
to be analyzed.
1
■Reanalysis of positioning data
The setting of [Cd.3] Positioning start No. is changed while [Md.61] Analysis complete flag is 1: Analysis completed, [Md.61]
Analysis complete flag turns to 0: Analysis not completed and the positioning data will be reanalyzed. When the reanalysis is
completed, [Md.61] Analysis complete flag turns again to 1: Analysis completed.
1 STARTING AND STOPPING
1.1 Starting
27
Restrictions
• The range of the positioning data Nos. used for the quick start is between 1 and 600. If a number other than 1 to 600 is set
for [Cd.3] Positioning start No., Pre-analysis not possible (Warning code: 09A8H) occurs and the pre-analysis of positioning
data is not performed. However, by inputting a start trigger signal, positioning data is analyzed before the positioning is
started, just as in the normal analysis mode. In this case, the setting in [Cd.43] Analysis mode setting remains 1: Pre-
analysis mode.
• In the pre-analysis mode, restarting is not allowed. To allow restarting, turn on a stop signal and change the analysis mode
to the normal analysis mode. If the analysis mode is changed again to the pre-analysis mode after changed to the pre-
analysis mode and restarting is attempted, Restart not possible (Error code: 090BH) occurs and restarting cannot be
executed.
• In the pre-analysis mode, the step function cannot be used. Even if [Cd.35] Step valid flag is 1: Carry out step operation
while positioning data is being analyzed, Step start disabled (Warning code: 09A6H) occurs and the normal operation is
performed with the setting ignored. (The step operation does not stop.)
• In the pre-analysis mode, the pre-reading start function cannot be used. The setting of Execution prohibition flag [Y14, Y15,
Y16, Y17] is ignored.
• In the pre-analysis mode, the manual control cannot be used. Starting the manual control causes Manual control start in
pre-analysis mode (Warning code: 09A4H), and the manual control does not start.
• Do not perform the manual pulse generator operation while the other axis is in the pre-analysis mode. To the axis where the
manual pulse generator operation is being performed, pulses may be output at an unintentional timing.
• The machine OPR, the fast OPR, the speed switching control using the positioning control (block start) and External
command signal, the position-speed switching control, the speed change, and the skip command cannot be used because
External command signal is invalid for a maximum of 1.77ms after the start. However, the speed-position switching control,
the position-speed switching control, and the speed change with the buffer memory can be performed.
Precautions
• If a start trigger is input while [Md.61] Analysis complete flag is 0: Analysis not completed, Pre-analysis incomplete start
(Warning code: 09A2H) occurs and the positioning will be started after the analysis of the positioning data is completed.
• When [Md.61] Analysis complete flag is set to 1: Analysis completed, errors are detected at intervals of 0.88ms. Thus, if a
start trigger is input within 0.88ms after the occurrence of an error, the operation may be started. In this case, the error is
detected immediately after the start, and the operation stops.
• The data reflected to basic parameter 2, detailed parameter 2, and positioning data is the one in the buffer memory at the
start of the analysis of positioning data. Therefore, even if a set value of basic parameter 2 and other data is changed after
the analysis of positioning data has been completed (When [Md.61] Analysis complete flag is 1: Analysis completed), the
value is not reflected to the control. To reflect the set value, conduct a reanalysis by changing the setting of [Cd.3]
Positioning start No. or using other methods.
The analysis of positioning data is performed by checking the settings of [Cd.43] Analysis mode setting and
[Cd.3] Positioning start No. at intervals of 0.88ms. Thus, set [Cd.43] Analysis mode setting and [Cd.3]
Positioning start No. beforehand so that the analysis starts 0.88ms earlier than the desired start timing and
earlier than a length of time longer than the analysis time for the positioning data. The analysis time for the
positioning data is approximately equal to the start time.
• For all the axes to which the quick start is performed, set [Cd.43] Analysis mode setting to 1: Pre-analysis mode. If 1: Pre-
analysis mode is set for the reference axis and 0: Normal analysis mode is set for the interpolation axes, Pre-analysis not
possible (Warning code: 09A9H) occurs and the pre-analysis of positioning data is not performed. However, by inputting a
start trigger signal, positioning data is analyzed before the positioning is started, just as in the normal analysis mode. In this
case, the setting in [Cd.43] Analysis mode setting remains 1: Pre-analysis mode.
• In the pre-analysis mode, the analysis of positioning data is performed in ascending order of axis numbers. For axes that do
not require the analysis of positioning data, such as an axis to be interpolated, setting [Cd.3] Positioning start No. to 0 is
recommended. Because the analysis of positioning data is not performed for the axes for which 0 is set, the time that
elapses until the positioning start is cut off.
28
1 STARTING AND STOPPING
1.1 Starting
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