Mitsubishi Electric MELSEC iQ-F FX5 User manual

MELSEC iQ-F
FX5 User's Manual (Serial Communication)

1
SAFETY PRECAUTIONS
(Read these precautions before using this product.)
Before using this product, please read this manual and the relevant manuals introduced in this manual carefully and pay full
attention to safety in order to handle the product correctly.
This manual classifies the safety precautions into two categories: " WARNING" and " CAUTION".
Depending on the circumstances, procedures indicated by " CAUTION" may also cause severe injury
It is important to follow all precautions for personal safety.
Store this manual in a safe place so that it can be read whenever necessary. Always forward it to the end user.
[DESIGN PRECAUTIONS]
[WIRING PRECAUTIONS]
WARNING
●Make sure to set up the following safety circuits outside the PLC to ensure safe system operation
even during external power supply problems or PLC failure. Otherwise, malfunctions may cause
serious accidents.
- Note that when the CPU module detects an error, such as a watchdog timer error, during self-
diagnosis, all outputs are turned off. Also, when an error that cannot be detected by the CPU
module occurs in an input/output control block, output control may be disabled. External circuits
and mechanisms should be designed to ensure safe machinery operation in such a case.
●Construct an interlock circuit in the program so that the whole system always operates on the safe
side before executing the control (for data change) to the PLC in operation. Read the manual
thoroughly and ensure complete safety before executing other controls (for program change,
parameter change, forcible output and operation status change) of the PLC in operation.
Otherwise, the machine may be damaged and accidents may occur due to erroneous operations.
WARNING
●Make sure to cut off all phases of the power supply externally before attempting installation or wiring
work. Failure to do so may cause electric shock or damage to the product.
●Make sure to attach the terminal cover, provided as an accessory, before turning on the power or
initiating operation after installation or wiring work. Failure to do so may cause electric shock.
●The temperature rating of the cable should be 80°C or more.
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
[WIRING PRECAUTIONS]
[STARTUP AND MAINTENANCE PRECAUTIONS]
●Make sure to wire the screw terminal block in accordance with the following precautions. Failure to do
so may cause electric shock, equipment failures, a short-circuit, wire breakage, malfunctions, or
damage to the product.
- The disposal size of the cable end should follow the dimensions described in the manual.
- Tightening torque should follow the specifications in the manual.
- Tighten the screws using a Phillips-head screwdriver No.2 (shaft diameter 6mm (0.24”) or less).
Make sure that the screwdriver does not touch the partition part of the terminal block.
●Make sure to wire the terminal block (European type) in accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit, wire breakage,
malfunctions, or damage to the product.
- The disposal size of the cable end should follow the dimensions described in the FX5 User's
Manual (Hardware).
- Tightening torque should follow the specifications in the FX5 User's Manual (Hardware).
- Twist the ends of stranded wires and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected parts are directly
stressed.
CAUTION
●Install module so that excessive force will not be applied to terminal blocks, power connectors, I/O
connectors, communication connectors, or communication cables.
Failure to do so may result in wire damage/breakage or PLC failure.
●Make sure to observe the following precautions in order to prevent any damage to the machinery or
accidents due to malfunction of the PLC caused by abnormal data written to the PLC due to the
effects of noise:
(1) Do not bundle the power line, control line and communication cables together with or lay them
close to the main circuit, high-voltage line, load line or power line. As a guideline, lay the power
line, control line and communication cables at least 100 mm (3.94”) away from the main circuit,
high-voltage line, load line or power line.
(2) Ground the shield of the shield wire or shielded cable at one point on the PLC. However, do not
use common grounding with heavy electrical systems.
WARNING
●Do not touch any terminal while the PLC's power is on. Doing so may cause electric shock or
malfunctions.
●Before cleaning or retightening terminals, cut off all phases of the power supply externally. Failure to
do so may cause electric shock.
●Before modifying the program in operation, forcible output, running or stopping the PLC, read through
this manual carefully, and ensure complete safety. An operation error may damage the machinery or
cause accidents.
WARNING

3
[STARTUP AND MAINTENANCE PRECAUTIONS]
●Do not change the program in the PLC from two or more peripheral equipment devices at the same
time. (i.e. from an engineering tool and a GOT) Doing so may cause destruction or malfunction of the
PLC program.
CAUTION
●Do not disassemble or modify the PLC. Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric representative.
●Turn off the power to the PLC before connecting or disconnecting any extension cable. Failure to do
so may cause equipment failures or malfunctions.
●Turn off the power to the PLC before attaching or detaching the following devices. Failure to do so
may cause equipment failures or malfunctions.
- Peripheral devices, expansion board, and expansion adapter
- Extension modules, bus conversion module and connector conversion module
-Battery
WARNING

4
INTRODUCTION
This manual explains the communication specifications and settings of the serial communication of FX5.
It should be read and understood before attempting to install or use the unit. Store this manual in a safe place so that you can
read it whenever necessary.
Always forward it to the end user.
Regarding use of this product
• This product has been manufactured as a general-purpose part for general industries, and has not been designed or
manufactured to be incorporated in a device or system used in purposes related to human life.
• Before using the product for special purposes such as nuclear power, electric power, aerospace, medicine or passenger
movement vehicles, consult Mitsubishi Electric.
• This product has been manufactured under strict quality control. However when installing the product where major
accidents or losses could occur if the product fails, install appropriate backup or failsafe functions into the system.
Note
• If in doubt at any stage during the installation of the product, always consult a professional electrical engineer who is
qualified and trained to the local and national standards. If in doubt about the operation or use, please consult your local
Mitsubishi Electric representative.
• Mitsubishi Electric will not accept responsibility for actual use of the product based on these illustrative examples. Please
use it after confirming the function and safety of the equipment and system.
• The content, specification etc. of this manual may be changed, for improvement, without notice.
• The information in this manual has been carefully checked and is believed to be accurate; however, if you notice a doubtful
point, an error, etc., please contact your local Mitsubishi Electric representative.

5
MEMO

6
CONTENTS
SAFETY PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
RELEVANT MANUALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
TERMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
CHAPTER 1 OUTLINE 13
CHAPTER 2 N:N NETWORK 14
2.1 Outline of System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.2 Procedures before Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Communication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Link specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2.5 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Wiring procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Termination resistor setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.6 Communication Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2.7 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Communication setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Contents of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Communication test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Create the master station program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Create programs for the slave stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
Cautions on program creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
2.8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Checking communication status based on LED indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Checking installation and wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Checking sequence program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Checking the communication setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Checking absence/presence of errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2.9 Related Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
List of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Details of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
CHAPTER 3 MC PROTOCOL 48
3.1 Function Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
3.2 Procedures before Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Communication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Link specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
3.5 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Wiring procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Selecting connection method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

7
CONTENTS
Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Termination resistor setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.6 Communication Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
3.7 MC Protocol Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Command list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59
Applicable device. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
3.8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Checking communication status based on LED indication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Checking installation and wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Checking sequence program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Checking the communication setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
Checking error codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .63
3.9 Related Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
List of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Details of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
CHAPTER 4 INVERTER COMMUNICATION 69
4.1 Function Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
4.2 Procedure before Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
4.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Communication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Applicable inverter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Inverter instruction codes and parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Time required for inverter communication instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
4.5 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Wiring procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Connection method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Connection devices (RJ45 connector and distributor). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Termination resistor setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Shielded wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
4.6 Inverter Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
FREQROL-A800 series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
FREQROL-F700P/A700 series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92
FREQROL-F700PJ/E700/D700/E700EX series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
FREQROL-V500 series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94
4.7 PLC Communication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
4.8 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Common items in inverter communication instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Inverter operation monitoring instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Inverter operation control instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Inverter parameter read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Inverter parameter write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Inverter parameter block write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Multiple inverter commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

8
Second parameter specification code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
4.9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Checking communication status based on LED display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Checking installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Checking sequence program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Checking the communication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Checking absence/presence of errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
4.10 Related Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
List of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Details of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
CHAPTER 5 NON-PROTOCOL COMMUNICATION 128
5.1 Function Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
5.2 Procedure before Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
5.3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
5.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
5.5 Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Wiring procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
Termination resistor setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
Connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
5.6 Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 136
5.7 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Serial data communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139
Operation of control line (RS-232C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Precautions for program creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
5.8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Checking communication status based on LED display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Checking installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Checking sequence program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Checking the communication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Caution on write during RUN, when RS2 instruction is driven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
Checking absence/presence of errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154
5.9 Related Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
List of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Details of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
CHAPTER 6 PREDEFINED PROTOCOL SUPPORT FUNCTION 165
6.1 Function Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
6.2 Procedure before Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
6.3 System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
6.4 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Communication specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Predefined protocol specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167
Communication type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
Packet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
6.5 Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
6.6 Protocol Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170
Adding protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171

9
CONTENTS
Configuring detailed setting of protocols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .172
Operations for protocol setting data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
6.7 Packet Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Terminator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 178
Length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Static Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Non-conversion Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
Conversion Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Check Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .189
Non-verified reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
6.8 Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Predefined protocol support instruction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 191
Program example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 198
6.9 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Checking communication status based on LED display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Checking installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Checking sequence program. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Checking the communication settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
Checking absence/presence of errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
6.10 Related Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
List of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Details of related devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
APPENDIX 212
Appendix 1 Combined Use of Serial Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 212
Appendix 2 Operation Image and Data Structure of Predefined Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .213
Operation image of each communication type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213
Verification operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Data examples of Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Data examples of Non-conversion Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .219
Data examples of Conversion Variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Data examples of Check Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Data examples of Non-verified reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Appendix 3 ASCII Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
INDEX 233
REVISIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .234
WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .235
TRADEMARKS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .236

10
RELEVANT MANUALS
User's manuals for the module
Manual title <manual number> Description
MELSEC iQ-F FX5 User's Manual (Startup)
<JY997D58201>
Performance specifications, procedures before operation, and troubleshooting of the
CPU module.
MELSEC iQ-F FX5U User's Manual (Hardware)
<JY997D55301>
Describes the details of hardware of the FX5U CPU module, including input/output
specifications, wiring, installation, and maintenance.
MELSEC iQ-F FX5UC User's Manual (Hardware)
<JY997D61401>
Describes the details of hardware of the FX5UC CPU module, including input/output
specifications, wiring, installation, and maintenance.
MELSEC iQ-F FX5 User's Manual (Application)
<JY997D55401>
Describes basic knowledge required for program design, functions of the CPU
module, devices/labels, and parameters.
MELSEC iQ-F FX5 Programming Manual (Program Design)
<JY997D55701>
Describes specifications of ladders, ST, FBD/LD, and other programs and labels.
MELSEC iQ-F FX5 Programming Manual (Instructions, Standard
Functions/Function Blocks)
<JY997D55801>
Describes specifications of instructions and functions that can be used in programs.
MELSEC iQ-F FX5 User's Manual (Serial Communication)
<JY997D55901> (This manual)
Describes N:N network, MELSEC Communication protocol, inverter communication,
non-protocol communication, and predefined protocol support.
MELSEC iQ-F FX5 User's Manual (MODBUS Communication)
<JY997D56101>
Describes MODBUS serial communication.
MELSEC iQ-F FX5 User's Manual (Ethernet Communication)
<JY997D56201>
Describes the functions of the built-in Ethernet port communication function.
MELSEC iQ-F FX5 User's Manual (SLMP)
<JY997D56001>
Explains methods for the device that is communicating with the CPU module by
SLMP to read and write the data of the CPU module.
MELSEC iQ-F FX5 User's Manual (Positioning Control)
<JY997D56301>
Describes the built-in positioning function.
MELSEC iQ-F FX5 User's Manual (Analog Control)
<JY997D60501>
Describes the analog function.
FX Series User's Manual - Data Communication Edition
<JY997D13301>
Describes the contents of communication types supported by PLCs of the FX3
Series or earlier.
GX Works3 Operating Manual
<SH-081215ENG>
System configuration, parameter settings, and online operations of GX Works3.

11
TERMS
Unless otherwise specified, this manual uses the following terms.
• indicates a variable part to collectively call multiple models or versions.
(Example) FX5U-32MR/ES, FX5U-32MT/ES FX5U-32M/ES
• For details on the FX3 devices that can be connected with the FX5, refer to FX5 User’s Manual (Hardware).
Terms Description
■Devices
FX5 Abbreviation of FX5 PLCs
FX3 Generic term for FX3S, FX3G, FX3GC, FX3U, and FX3UC PLCs
FX5 CPU module Generic term for FX5U CPU module and FX5UC CPU module
FX5U CPU module Generic term for FX5U-32MR/ES, FX5U-32MT/ES, FX5U-32MT/ESS, FX5U-64MR/ES, FX5U-64MT/ES,
FX5U-64MT/ESS, FX5U-80MR/ES, FX5U-80MT/ES, and FX5U-80MT/ESS
FX5UC CPU module Generic term for FX5UC-32MT/D and FX5UC-32MT/DSS
Extension module Generic term for FX5 extension modules and FX3 function modules
• FX5 extension module Generic term for I/O modules, FX5 extension power supply module, and FX5 intelligent function module
• FX3 extension module Generic term for FX3 extension power supply module and FX3 special function blocks
Extension module (extension cable type) Input modules (extension cable type), Output modules (extension cable type), Bus conversion module
(extension cable type), and Intelligent function modules
Extension module (extension connector type) Input modules (extension connector type), Output modules (extension connector type), Input/output
modules, Bus conversion module (extension connector type), and Connector conversion module (extension
connector type)
I/O module Generic term for input modules, output modules, Input/output modules, and powered input/output modules
Input module Generic term for Input modules (extension cable type) and Input modules (extension connector type)
• Input module (extension cable type) Generic term for FX5-8EX/ES and FX5-16EX/ES
• Input module (extension connector type) Generic term for FX5-C32EX/D and FX5-C32EX/DS
Output module Generic term for output modules (extension cable type) and output modules (extension connector type)
• Output module (extension cable type) Generic term for FX5-8EYR/ES, FX5-8EYT/ES, FX5-8EYT/ESS, FX5-16EYR/ES, FX5-16EYT/ES, and
FX5-16EYT/ESS
• Output module (extension connector type) Generic term for FX5-C32EYT/D and FX5-C32EYT/DSS
Input/output modules Generic term for FX5-C32ET/D and FX5-C32ET/DSS
Powered input/output module Generic term for FX5-32ER/ES, FX5-32ET/ES, and FX5-32ET/ESS
Extension power supply module Generic term for FX5 extension power supply module and FX3 extension power supply module
• FX5 extension power supply module Different name for FX5-1PSU-5V
• FX3 extension power supply module Different name for FX3U-1PSU-5V
Intelligent module The abbreviation for intelligent function modules
Intelligent function module Generic term for FX5 intelligent function modules and FX3 intelligent function modules
• FX5 intelligent function module Generic term for FX5 intelligent function modules
• FX3 intelligent function module Generic term for FX3 special function blocks
Simple motion module Different name for FX5-40SSC-S
Expansion board Generic term for board for FX5U CPU module
• Communication board Generic term for FX5-232-BD, FX5-485-BD, and FX5-422-BD-GOT
Expansion adapter Generic term for adapter for FX5 CPU module
• Communication adapter Generic term for FX5-232ADP and FX5-485ADP
• Analog adapter Generic term for FX5-4AD-ADP and FX5-4DA-ADP
Bus conversion module Generic term for Bus conversion module (extension cable type) and Bus conversion module (extension
connector type)
• Bus conversion module (extension cable
type)
Different name for FX5-CNV-BUS
• Bus conversion module (extension connector
type)
Different name for FX5-CNV-BUSC
Battery Different name for FX3U-32BL
Peripheral device Generic term for engineering tools and GOTs
GOT Generic term for Mitsubishi Graphic Operation Terminal GOT1000 and GOT2000 series

12
■Software packages
Engineering tool The product name of the software package for the MELSEC programmable controllers
GX Works3 The product name of the software package, SWnDND-GXW3, for the MELSEC programmable controllers
(The 'n' represents a version.)
■Manuals
User's manual Generic term for separate manuals
• User's manual (Startup) Abbreviation of MELSEC iQ-F FX5 User's Manual (Startup)
• FX5 User's manual (Hardware) Generic term for MELSEC iQ-F FX5U User's Manual (Hardware) and MELSEC iQ-F FX5UC User's Manual
(Hardware)
• FX5U User's manual (Hardware) Abbreviation of MELSEC iQ-F FX5U User's Manual (Hardware)
• FX5UC User's manual (Hardware) Abbreviation of MELSEC iQ-F FX5UC User's Manual (Hardware)
• User's manual (Application) Abbreviation of MELSEC iQ-F FX5 User's Manual (Application)
Programming manual (Program Design) Abbreviation of MELSEC iQ-F FX5 Programming Manual (Program Design)
Programming manual (Instructions, Standard
Functions/Function Blocks)
Abbreviation of MELSEC iQ-F FX5 Programming Manual (Instructions, Standard Functions/Function Blocks)
Communication manual Generic term for MELSEC iQ-F FX5 User's Manual (Serial Communication), MELSEC iQ-F FX5 User's
Manual (MODBUS Communication), MELSEC iQ-F FX5 User's Manual (Ethernet Communication), and
MELSEC iQ-F FX5 User's Manual (SLMP)
• Serial communication manual Abbreviation of MELSEC iQ-F FX5 User's Manual (Serial Communication)
• MODBUS communication manual Abbreviation of MELSEC iQ-F FX5 User's Manual (MODBUS Communication)
• Ethernet communication manual Abbreviation of MELSEC iQ-F FX5 User's Manual (Ethernet Communication)
• SLMP manual Abbreviation of MELSEC iQ-F FX5 User's Manual (SLMP)
Positioning manual Abbreviation of MELSEC iQ-F FX5 User's Manual (Positioning Control)
Analog manual Abbreviation of MELSEC iQ-F FX5 User's Manual (Analog Control)
■Communication
Built-in RS-485 port Built-in RS-485 port of the CPU module.
Serial port Generic term for FX5 Series built-in RS-485 port (CH1), communication board (CH2), communication
adapter 1 (CH3), and communication adapter 2 (CH4) (4 ports)
Counterpart device Generic term for device with which communication is conducted. (PC, indicators, etc.)
Terms Description

1 OUTLINE
13
1
1OUTLINE
The table below shows the serial communication types supported by the FX5.
Communication
functions
Function Reference
section
N:N Network Up to eight PLCs are connected, and data is automatically transferred among them. Page 14
MC protocol MC protocol is used to access CPU module and external devices (PC, GOT, etc.) from equipment that supports
MC protocol via Ethernet or serial communication.
The serial port of the FX5 is capable of communication with MC protocol 3C/4C frame.
Page 48
Inverter communication An FX PLC can control up to 16 inverters via RS-485 communication. Page 69
Non-protocol
communication
Non-protocol serial communication is available between an FX PLC and RS-232C/RS-485 interface equipment
such as bar code reader, printer, personal computer and measuring instrument.
Page 128
Predefined protocol
suppor
Data can be sent and received between the counterpart device and CPU module with a protocol appropriate to
the counterpart device (such as measuring instrument or barcode reader).
Page 165

14 2 N:N NETWORK
2.1 Outline of System
2N:N NETWORK
This chapter explains the N:N Network.
2.1 Outline of System
N:N Network allows connection of up to eight FX5 PLCs or FX3 PLCs via mutually linked devices through communication in
accordance with RS-485.
• One of three patterns can be selected according to the number of devices to be linked.
• Data link is automatically updated between up to eight FX5 PLCs or FX3 PLCs.
• The total extension distance is 1200m maximum. (only when the FX5-485ADP is used in the configuration)
• FX5 PLCs can set head device number for internal relay (M) and data register (D) for link.
The link information can be monitored in the master station and all slave stations.
The figure above shows the maximum number of linked devices. There are differences in specification depending on the
selected link pattern and FX Series.
System
1200m maximum (Distance varies depending on communication equipment type.)
8 units
FX5 PLC
Built-in
RS-485 port
Master station
Built-in
RS-485 port
Slave station Slave station No.2
FX5 PLC FX3 PLC
RS-485 communication
equipment
Transfer
direction
Transfer
direction
Word devices Word devicesWord devices
(Device numbers : D2000)
Bit devices
(Device numbers : M200)
M200 to M263
M264 to M327
M328 to M391
M648 to M711
Bit devices
(Device numbers : Fixed)
M1000 to M1063
M1064 to M1127
M1128 to M1191
M1448 to M1511
Bit devices
(Device numbers: M0)
M0 to M63
M64 to M127
M128 to M191
M448 to M511
D2000 to D2007
D2010 to D2017
D2020 to D2027
D2070 to D2077
(Device numbers : Fixed)
D0 to D7
D10 to D17
D20 to D27
D70 to D77
(Device numbers : D100)
D100 to D107
D110 to D117
D120 to D127
D170 to D177

2 N:N NETWORK
2.2 Procedures before Operation 15
2
2.2 Procedures before Operation
The flow chart below shows the N:N Network setting procedures up until data link:
*1 For more details about the connection and operation methods between the engineering tool (GX Works3) and PLC, refer to the manual
below.
GX Works3 Operating Manual
2.3 System Configuration
This section outlines the system configuration required to use the N:N Network.
You can use the N:N Network function in the CPU module using the built-in RS-485 port, communication board, and
communication adapter.
Allotment of serial ports is set to the following fixed numbers, regardless of system configuration.
1. Check communication specifications
Refer to Page 16 Specifications.
•Communication specifications, link specifications
•Link pattern and number of link points
•Link time
2. System configuration and selection
Refer to Page 15 System Configuration.
•System Configuration
•Select communication equipment
3. Wiring
Refer to Page 19 Wiring.
•Wiring with twisted pair cable
•Wiring example
4. Communication settings*1
Refer to Page 22 Communication Setting.
5. Program creation
Refer to Page 25 Programming.
•Communication test program
•Master station program
•Slave station program
FX5U CPU module FX5UC CPU module
CH2: Communication board
CH1: Built-in RS-485 port
CH3: Communication adapter-1
CH4: Communication adapter-2
CH3: Communication adapter-1
CH1: Built-in RS-485 port
CH4: Communication adapter-2

16 2 N:N NETWORK
2.4 Specifications
Communication device
*1 Assign CH3 and CH4 in the order from the adapter closest tomodule.
For the FX3 system configuration, refer to the manual below.
FX Series User's Manual - Data Communication Edition
In N:N Network, only one channel is available to use for one CPU module.
2.4 Specifications
This section describes the communication specifications and performance of the N:N Network function.
For the specifications of FX3 PLC, refer to FX Series User's Manual - Data Communication Edition.
Communication specifications
The N:N Network function is executed according to the communication specifications (fixed) shown in the table below.
Specification items such as baud rate cannot be changed.
Serial port Important points in selection Overall distance
Built-in RS-485 port CH1 Since it is built-into the CPU module, there is no need to add
equipment.
50 m or less
Communication
board
FX5-485-BD CH2 Mounted on top of the CPU module, there is no change in the
installation space requirements.
50 m or less
Communication
adapter
FX5-485ADP CH3, CH4*1 Mount the communication adapter to the left of the CPU
module.
1200 m or less
Items Specifications Remarks
Number of connectable units Maximum of 8 
Transmission standard RS-485 standard 
Maximum overall distance When only FX5-485ADP is used in the configuration: 1200 m or less
When configuring with FX5-485ADP or FX3U-485ADP: 500 m or less
Other than the above configuration: 50 m or less
When the built-in RS-485 port, FX5-485-BD
and 485-BD for FX3 Series are all connected:
50 m or less
Protocol type N:N Network 
Control procedure 
Communication method Half-duplex 
Baud rate 38400 bps 
Character
format
Start bit 1 bit 
Data length 7 bit 
Parity bit Even 
Stop bit 1 bit 
Header Fixed 
Terminator Fixed 
Control line 
Sum check Fixed 

2 N:N NETWORK
2.4 Specifications 17
2
Link specifications
Link pattern and number of link points
Settings of the link pattern are performed with GX Works3 Serial Communication setting. (Page 22 Communication
Setting)
The number of occupied points of the link device differ depending on the number of link patterns and local stations to be used.
The devices to be occupied are assigned according to the head number of the link device.
When an FX3 PLC are used, even if the link device numbers are different from that of FX5 PLC (the link device numbers of
FX3 PLC are fixed), the link devices corresponding to its station number are linked.
Precautions
When creating a program, do not change the information in devices used by other stations. If such information is changed, the
other stations will not operate normally.
Station number Model Pattern 0 Pattern 1 Pattern 2
Internal relay
(M)
Data register
(D)
Internal relay
(M)
Data register
(D)
Internal relay
(M)
Data register
(D)
0 points 4 in each
station
32 in each
station
4 in each
station
64 in each
station
8 in each
station
Master
station
Station
No. 0
FX5 D (x)
to D (x+3)
M (y)
to M (y+31)
D (x)
to D (x+3)
M (y)
to M (y+63)
D (x)
to D (x+7)
FX3 D0 to D3 M1000 to M1031 D0 to D3 M1000 to M1063 D0 to D7
Slave
stations
Station
No. 1
FX5 D (x+10)
to D (x+13)
M (y+64)
to M (y+95)
D (x+10)
to D (x+13)
M (y+64)
to M (y+127)
D (x+10)
to D (x+17)
FX3 D10 to D13 M1064 to M1095 D10 to D13 M1064 to M1127 D10 to D17
Station
No. 2
FX5 D (x+20)
to D (x+23)
M (y+128)
to M (y+159)
D (x+20)
to D (x+23)
M (y+128)
to M (y+191)
D (x+20)
to D (x+27)
FX3 D20 to D23 M1128 to M159 D20 to D23 M1128 to M1191 D20 to D27
Station
No. 3
FX5 D (x+30)
to D (x+33)
M (y+192)
to M (y+223)
D (x+30)
to D (x+33)
M (y+192)
to M (y+255)
D (x+30)
to D (x+37)
FX3 D30 to D33 M1192 to M1223 D30 to D33 M1192 to M1255 D30 to D37
Station
No. 4
FX5 D (x+40)
to D (x+43)
M (y+256)
to M (y+287)
D (x+40)
to D (x+43)
M (y+256)
to M (y+319)
D (x+40)
to D (x+47)
FX3 D40 to D43 M1256 to M1287 D40 to D43 M1256 to M1319 D40 to D47
Station
No. 5
FX5 D (x+50)
to D (x+53)
M (y+320)
to M (y+351)
D (x+50)
to D (x+53)
M (y+320)
to M (y+383)
D (x+50)
to D (x+57)
FX3 D50 to D53 M1320 to M1651 D50 to D53 M1320 to M1383 D50 to D57
Station
No. 6
FX5 D (x+60)
to D (x+63)
M (y+384)
to M (y+415)
D (x+60)
to D (x+63)
M (y+384)
to M (y+447)
D (x+60)
to D (x+67)
FX3 D60 to D63 M1384 to M1415 D60 to D63 M1384 to M1447 D60 to D67
Station
No. 7
FX5 D (x+70)
to D (x+73)
M (y+448)
to M (y+479)
D (x+70)
to D (x+73)
M (y+448)
to M (y+511)
D (x+70)
to D (x+77)
FX3 D70 to D73 M1448 to M1479 D70 to D73 M1448 to M1511 D70 to D77
x: Link device head number of data register (D)
y: Link device head number of internal relay (M)

18 2 N:N NETWORK
2.4 Specifications
Refresh range: pattern 1, link device head number: all station D1000/M4000,
Master station: FX5 PLC, slave station: FX5 PLC 3
In the example above, devices from D1000 to D1033 (34 points from the head device number of D) and from M4000 to M4223
(224 points from the head device number of M) are occupied. Other devices can be used as general control devices.
Link devices for unconnected slave stations can be used as general control devices; however, it is recommended to save the
unoccupied link devices for the slave stations to be used in the future.
Refresh range: pattern 2, Link device head number: station 0 (D200/M2000), station 2 (D500/M3000)
Master station: FX5 PLC, slave station: FX5 PLC 1/FX3 PLC 2
The link devices are allocated as above and the link device numbers are different according to the station number (for the FX3
series, the numbers are fixed). However, the link device numbers are linked to the corresponding devices.
The link device head number of FX5 PLC can be set individually for each station; however, unifying the numbers in the system
is recommended to prevent disordered numbers.
Link time
The link time indicates the cycle time from the start of parameter message editing until link devices are updated and
parameter message editing is restarted.
The link time varies depending on the number of linked units (master station and slave stations) and the number of linked
devices as shown in the table below.
Station number Master station Slave stations
Station No. 0 (FX5 PLC) Station No. 1 (FX5 PLC) Station No. 2 (FX5 PLC) Station No. 3 (FX5 PLC)
Master station Station No.
0
D1000 to D1003
M4000 to M4031
D1000 to D1003
M4000 to M4031
D1000 to D1003
M4000 to M4031
D1000 to D1003
M4000 to M4031
Slave stations Station No.
1
D1010 to D1013
M4064 to M4095
D1010 to D1013
M4064 to M4095
D1010 to D1013
M4064 to M4095
D1010 to D1013
M4064 to M4095
Station No.
2
D1020 to D1023
M4128 to M4159
D1020 to D1023
M4128 to M4159
D1020 to D1023
M4128 to M4159
D1020 to D1023
M4128 to M4159
Station No.
3
D1030 to D1033
M4192 to M4223
D1030 to D1033
M4192 to M4223
D1030 to D1033
M4192 to M4223
D1030 to D1033
M4192 to M4223
Station number Master station Slave stations
Station No. 0 (FX5 PLC) Station No. 1 (FX3 PLC) Station No. 2 (FX5 PLC) Station No. 3 (FX3 PLC)
Master station Station No.
0
D200 to D207
M2000 to M2063
D0 to D7
M1000 to M1063
D500 to D507
M3000 to M3063
D0 to D7
M1000 to M1063
Slave stations Station No.
1
D210 to D217
M2064 to M2127
D10 to D17
M1064 to M1127
D510 to D517
M3064 to M3127
D10 to D17
M1064 to M1127
Station No.
2
D220 to D227
M2128 to M2191
D20 to D27
M1128 to M1191
D520 to D527
M3128 to M3191
D20 to D27
M1128 to M1191
Station No.
3
D230 to D237
M2192 to M2255
D30 to D37
M1192 to M1255
D530 to D537
M3192 to M3255
D30 to D37
M1192 to M1255
Number of linked units Pattern 0 Pattern 1 Pattern 2
0 bit-device (M)
4 word-devices (D)
32 bit-devices (M)
4 word-devices (D)
64 bit-devices (M)
8 word-devices (D)
220 ms 24 ms 37 ms
3 29 ms 35 ms 52 ms
4 37 ms 45 ms 70 ms
5 46 ms 56 ms 87 ms
6 54 ms 67 ms 105 ms
7 63 ms 78 ms 122 ms
8 72 ms 88 ms 139 ms
Ex.
Ex.