Panasonic AFP7CPS4E, AFP7CPS3E, AFP7CCS1, AFP7CCS2, AFP7CCM1 User Manual

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Safety Precautions

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Observe the following notices to ensure personal safety or to prevent accidents.
To ensure that you use this product correctly, read this User’s Manual thoroughly before use.
Make sure that you fully understand the product and information on safety.
This manual uses two safety flags to indicate different levels of danger.

WARNING

If critical situations that could lead to user’s death or serious injury is assumed by
mishandling of the product.

-Always take precautions to ensure the overall safety of your system, so that the whole

system remains safe in the event of failure of this product or other external factor.

-Do not use this product in areas with inflammable gas. It could lead to an explosion.

-Exposing this product to excessive heat or open flames could cause damage to the lithium
battery or other electronic parts.

CAUTION

If critical situations that could lead to user’s injury or only property damage is
assumed by mishandling of the product.

-To prevent excessive exothermic heat or smoke generation, use this product at the values
less than the maximum of the characteristics and performance that are assured in these
specifications.

-Do not dismantle or remodel the product. It could cause excessive exothermic heat or smoke
generation.

-Do not touch the terminal while turning on electricity. It could lead to an electric shock.

-Use the external devices to function the emergency stop and interlock circuit.

-Connect the wires or connectors securely.
The loose connection could cause excessive exothermic heat or smoke generat ion.

-Do not allow foreign matters such as liquid, flammable materials, metals to go into the inside
of the product. It could cause excessive exothermic heat or smoke generation.

-Do not undertake construction (such as connection and disconnection) while the power
supply is on. It could lead to an electric shock.

Copyright / Trademarks

-This manual and its contents are copyrighted.

-You may not copy this manual, in whole or part, without written consent of

Industrial Devices SUNX Co., Ltd.

-Windows is a registered trademark of Microsoft Corporation in th e United States and other
countries.

-All other company names and product names are trademarks or registered trademarks of
their respective owners.

Panasonic

PLC_ORG

Introduction

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Thank you for buying a Panasonic product. Before you use the product, please carefully read
the installation instructions and the users manual, and understand their contents in detail to
use the product properly.

Types of Manual

 There are different types of user's manual for the FP7 series, as listed below. Please refer to

a relevant manual for the unit and purpose of your use.

The manuals can be downloaded on our website.



Unit name or purpose of
use

FP7 Power Supply Unit

FP7 CPU Unit

ons for Built-in

Instructi
LAN Port

ons for Built-in

Instructi
COM Port

FP7 Extension Cassette
(Communication)
(RS-232C/RS485 type)

FP7 Extension Cassette
(Communication)
(Ethernet type)

FP7 Extension (Function)
Cassette

Analog Cassette
FP7 Digital Input/Output Unit FP7 Digital Input/Output Unit Users Manual WUME-FP7DIO
FP7 Analog Input Unit FP7 Analog Input Unit Users Manual WUME-FP7AIH
FP7 Analog Output Unit FP7 Analog Output Unit Users Manual WUME-FP7AOH
FP7 High-speed counter Unit FP7 High-speed counter Unit Users Manual WUME-FP7HSC

FP7 Pulse Output Unit FP7 Pulse Output Unit Users Manual
FP7 Positioning Unit FP7 Positioning Unit Users Manual WUME-FP7POSP

FP7 Serial Communication
Unit

PHLS System PHLS System Users Manual WUME-PHLS
Programming Software

FPWIN GR7

Manual name Manual code

FP7 CPU Unit Users Manual (Hardware) WUME-FP7CPUH

FP7 CPU Unit Command Reference Manual WUME-FP7CPUPGR
FP7 CPU Unit Users Manual

(Logging Trace Function)
FP7 CPU Unit Users Manual (Security Function) WUME-FP7CPUSEC
FP7 CPU Unit Users Manual

(LAN Port Communication)

FP7 series Users Manual (SCU communication) WUME-FP7COM

FP7 series Users Manual (Communication
cassette Ethernet type)

FP7 Analog Cassette Users Manual

FP7 series Users Manual (SCU communication) WUME-FP7COM

FPWIN GR7 Introduction Guidance WUME-FPWINGR7

WUME-FP7CPULOG

WUME-FP7LAN

WUME-FP7CCET

WUME-FP7FCA
(Upcoming)

WUME-FP7PG
(Upcoming)

Table of Contents

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Table of Contents

1. Functions of Units and Restrictions on Combination.....1-1

1.1 Features and Functions of Units ............................................................ 1-2

1.1.1 Functions of Units....................................................................................1-2

1.1.2 Types of Unit...........................................................................................1-3

1.1.3 Types of Cassette ...................................................................................1-3

1.1.4 Applications that can be Used in Each Port............................................1-3

1.2 Overview of Communication Functions..................................................1-4

1.2.1 PLC Link Functions (MEWNET-W0).......................................................1-4

1.2.2 MEWTOCOL Master/Slave Communication...........................................1-5

1.2.3 MODBUS RTU Master/Slave Communication........................................1-6

1.2.4 General-Purpose Communication...........................................................1-7

1.3 Restrictions on Units Combination.........................................................1-8

1.3.1 Restrictions on the Number of Installed Units.........................................1-8

1.3.2 Restrictions on the Combination of Extension Cassettes (Communication

Cassettes)...............................................................................................1-8

1.3.3 Restrictions on Communication Functions to be Used ...........................1-8

1.3.4 Unit to be Used and Applicable Versions of CPU Unit and FPWIN GR71-8

1.3.5 Restrictions on Consumption Current.....................................................1-9

2. Names and Functions of Parts ..........................................2-1

2.1 Names and Functions of Parts............................................................... 2-2

2.1.1 Communication Port of CPU Unit............................................................2-2

2.1.2 Parts Names and Functions of Serial Communication Unit....................2-3

3. Wiring the COM. Port..........................................................3-1

3.1 Attaching a Communication Cassette....................................................3-2

3.1.1 Attachment Instructions...........................................................................3-2

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3.2 Wiring of COM Port Terminal Block........................................................3-3

3.2.1 Suitable Wires and Tools........................................................................3-3

3.2.2 Applicable Cable.....................................................................................3-4

3.2.3 Wiring Method.........................................................................................3-5

3.3 Wiring for CPU Unit (GT Power Supply and COM0 Port).......................3-6

3.3.1 Handling of GT Power Supply Terminals................................................3-6

3.3.2 Terminal Layouts and Examples of Wiring .............................................3-6

3.4

Wiring for Communication Cassettes COM.1 to COM.4 Ports...............3-8

3.4.1 Communication Cassette AFP7CCS1 (RS-232C, 1-Channel Insulated

Type).......................................................................................................3-8

3.4.2 Communication Cassette AFP7CCS2 (RS-232C, 2-channel insulated

type) ........................................................................................................3-9

3.4.3 Communication Cassette AFP7CCM1 (RS-422 / RS-485, 1-Channel

Insulated Type) .....................................................................................3-12

3.4.4 Communication Cassette AFP7CCM2 (RS-422 / RS-485, 2-Channel

Insulated Type) .....................................................................................3-15

3.4.5 Communication Cassette AFP7CCS1M1 (RS-232C 1-Channel + RS-485

1-Channel Insulated Type)....................................................................3-19

4. I/O Allocation .......................................................................4-1

4.1 Input/Output Signals Used for Communication.......................................4-2

4.1.1 I/O Allocation of CPU Unit.......................................................................4-2

4.1.2 I/O Allocation of Serial Communication Unit...........................................4-4

4.2 Registration in I/O Map...........................................................................4-6

4.2.1 Settings Using FPWIN GR7 (For CPU with built-in SCU).......................4-6

4.2.2 Settings Using FPWIN GR7 (For Serial Communication Unit) ...............4-6

5. Setting and Confirming Communication Conditions.......5-1

5.1 Setting Applications and Communication Conditions.............................5-2

5.1.1 Applications to be Set for Each Port .......................................................5-2

5.1.2 Conditions to be Set for Each Port..........................................................5-2

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5.2 Setting Communication Conditions........................................................5-3

5.2.1 Settings Using FPWIN GR7 (For CPU with built-in SCU).......................5-3

5.2.2 Settings Using FPWIN GR7 (For Serial Communication Unit) ...............5-4

6. PLC Link...............................................................................6-1

6.1 Operation of PLC link MEWNET-W0...................................................... 6-2

6.1.1 Overview of PLC Link Operation.............................................................6-2

6.1.2 Operation of Link Relays and Link Registers..........................................6-3

6.2 Configuration Required for PLC Link...................................................... 6-4

6.2.1 Setup Procedure (For CPU with built-in SCU)........................................6-4

6.2.2 Setup Procedure (For Serial Communication Unit).................................6-5

6.2.3 List of Setting Items.................................................................................6-6

6.3 Setting Items for PLC Link...................................................................... 6-7

6.3.1 Station No. Setting ..................................................................................6-7

6.3.2 Max. Station No. Setting..........................................................................6-7

6.3.3 Memory Block Numbers for Link Relays and Link Registers to be Used6-8

6.3.4 Range of Use of Link Relays and Range of Use of Link Registers ........6-8

6.3.5 Starting No. for Link Relay Send Area and Sending Size.......................6-9

6.3.6 Starting No. for Link Register Send Area and Sending Size.................6-10

6.4 PLC Link Response Time..................................................................... 6-12

6.4.1 Response Time of 1 Transmission Cycle..............................................6-12

6.4.2 Response Time When There is a Station Yet to be Added ..................6-14

7. MEWTOCOL Master/Slave Communication...................... 7-1

7.1 Configuration.......................................................................................... 7-2

7.1.1 Setting Communication Conditions.........................................................7-2

7.2 List of MEWTOCOL / MEWTOCOL7 Supporting Commands................ 7-3

7.2.1 List of MEWTOCOL Commands.............................................................7-3

7.2.2 List of MEWTOCOL7 Commands...........................................................7-3

iv

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7.3 MEWTOCOL-COM Master Communication (RECV)..............................7-4

7.3.1 Read Data from an External Device .......................................................7-4

7.3.2 RECV Instruction (When MEWTOCOL-COM is Used)...........................7-7

7.4 MEWTOCOL-COM Master Communication (SEND)..............................7-8

7.4.1 Write Data into an External Device.........................................................7-8

7.4.2 SEND Instruction (When MEWTOCOL-COM is Used).........................7-11

8. MODBUS RTU Master/Slave Communication..................8-1

8.1 Configuration ..........................................................................................8-2

8.1.1 Setting Communication Conditions.........................................................8-2

8.2 List of MODBUS RTU Supported Commands........................................8-3

8.2.1 List of MODBUS Function Codes............................................................8-3

8.3 MODBUS RTU Master Communication (RECV)....................................8-4

8.3.1 Read Data from an External Device .......................................................8-4

8.3.2 RECV Instruction (MODBUS Function Code Specified Type)................8-7

8.3.3 RECV Instruction (MODBUS Function Code Unspecified Type)............8-8

8.4 MODBUS RTU Master Communication (SEND)....................................8-9

8.4.1 Write Data into an External Device.........................................................8-9

8.4.2 SEND Instruction (MODBUS Function Code Specified Type)..............8-12

8.4.3 SEND Instruction (MODBUS Function Code Unspecified Type)..........8-13

9. General-Purpose Communication .....................................9-1

9.1 Operation of General-Purpose Communication......................................9-2

9.1.1 Read Data from an External Device .......................................................9-2

9.1.2 Write Data into an External Device.........................................................9-2

9.2 Configuration ..........................................................................................9-3

9.2.1 Setting Communication Conditions.........................................................9-3

9.3 Sending Operation..................................................................................9-4

9.3.1 Overview of Sending Operation..............................................................9-4

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Table of Contents

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9.3.2 Contents of Sent Data.............................................................................9-6

9.3.3 GPSEND (General-Purpose Communication Sending Instruction)........9-7

9.3.4 Precautions on Sending Data .................................................................9-8

9.4 Receiving Operation...............................................................................9-9

9.4.1 Overview of Receiving Operation............................................................9-9

9.4.2 Contents of Received Data ...................................................................9-12

9.4.3 Precautions on Receiving Data.............................................................9-12

9.4.4 Operations of the "Reception done copy" flag and multiplex reception9-13

9.4.5 GPRECV (General-Purpose Communication Receiving Instruction) ...9-14

9.5 Sending/Receiving Flag Operation....................................................... 9-15

9.5.1 No Header (Start Code), Terminator (End Code) "CR": .......................9-15

9.5.2 Start Code "STX", End Code "ETX":.....................................................9-16

10. Troubleshooting...............................................................10-1

10.1 Self-diagnostic Function....................................................................... 10-2

10.1.1 CPU Unit’s Operation Monitor LED.......................................................10-2

10.1.2 Operation at the Time of Error..............................................................10-2

10.1.3 Serial Communication Unit's Operation Monitor LE D...........................10-3

10.2 What to DO If an Error Occurs (For Each Communication Mode) ...... 10-4

10.2.1 When Using PLC Link Function ............................................................10-4

10.2.2 When Using MEWTOCOL/ MEWTOCOL7/ MODBUS-RTU Function..10-4

10.2.3 When Using General-purpose Communication Function......................10-5

10.3 Checking Status with PMGET Instruction ............................................ 10-6

10.3.1 Specifications of PMGET Instruction.....................................................10-6

10.3.2 List of Communication Parameters.......................................................10-6

10.4 Clearing Errors Using User Programs.................................................. 10-9

10.4.1 Clearing Errors Using User Programs...................................................10-9

vi

Table of Contents

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11. Specifications ...................................................................11-1

11.1 Communication Function Specifications...............................................11-2

11.1.1 CPU Unit Communication Specifications..............................................11-2

11.1.2 Extension Cassette Comm unication Specifications..............................11-4

11.2 MEWTOCOL-COM Format...................................................................11-5

11.2.1 MEWTOCOL-COM Command Format .................................................11-5

11.2.2 MEWTOCOL-COM Response Format..................................................11-7

11.3 MEWTOCOL7-COM Format.................................................................11-9

11.3.1 MEWTOCOL7-COM Command Format ...............................................11-9

11.3.2 MEWTOCOL7 Response Format.......................................................11-11

11.4 MODBUS RTU Format .......................................................................11-13

11.4.1 MODBUS RTU Command Format......................................................11-13

11.4.2 MODBUS RTU Response Format ......................................................11-14

vii

Table of Contents

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viii

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1

Functions of Units and

Restrictions on Combination

Functions of Units and Restrictions on Combination

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1.1 Features and Functions of Units

1.1.1 Functions of Units

CPU Unit

One
communication
cassette can be
attached.

COM.0 port is

equipped as standard.

(For 3-wire RS-232C)

Serial Communication Unit

Two
communication
cassettes can be

 Removable serial communication cassettes are used.

 Selectable from five communication cassettes in conformity with communication standards

of RS-232C, RS-422 and RS-485. (Sold separately)

 One communication cassette can be attached to the CPU unit, and two communication

cassettes to the serial communication unit.

 The CPU unit includes a COM.0 port as standard equipment.

The CPU unit includes a RS-232C port (3-wire type) for the connection with a programmable
display and a power supply as standard equipment.

 Four communication modes are available.

The PC link, MEWTOCOL, MODBUS RTU and general-purpose communication modes are
provided, and many serial communication devices can be connected by the combination of
communication cassettes.

1-2

1.1 Features and Functions of Units

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1.1.2 Types of Unit

 Types of unit that can perform serial communication

Name Model no.

AFP7CPS4E

CPU Unit

Serial Communication Unit AFP7NSC

(Note 1) The COM.0 port equipped in the CPU unit is a terminal block especially for RS-232C (3-wire type).

AFP7CPS3E
AFP7CPS3

Communication ports that can be allocated

COM.0 COM.1 COM.2 COM.3 COM.4

● ● ●

● ● ● ●

1.1.3 Types of Cassette

 Types of communication cassette

Model no. Communication interface

AFP7CCS1 1-channel RS-232C

AFP7CCS2

AFP7CCM1 1-channel RS-422 / RS-485
AFP7CCM2 2-channel RS-422 / RS-485

AFP7CCS1M1

(Note 1) For AFP7CCS2, select and use either 3-wire 2-channel RS-232C or 5-wire 1-channel RS-232C. Switching

should be performed using a switch on the Communication Cassette.

(Note 2) For AFP7CCM1 and AFP7CCM2, select and use either RS-422 or RS-485. Switching should be performed

using a switch on the Communication Cassette.

(Note 3) For AFP7CCS1M1, both 1-channel RS-485 and 3-wire 1-channel RS-232C can be used.

3-wire 2-channel RS-232C
5-wire 1-channel RS-232C

1-channel RS-485
3-wire 1-channel RS-232C

Communication ports that can be allocated

COM.0 COM.1 COM.2 COM.3 COM.4

● ●

● ● ● ●

● ●

● ●

● ● ● ●

● ●

● ●

1.1.4 Applications that can be Used in E ach Port

 Available functions for each communication port

Communication function to be used

PLC link
MEWTOCOL7-COM (Note 1)

MEWTOCOL-COM

MODBUS-RTU

General-purpose communication

(Note 1) In MEWTOCOL7-COM, there is no master communication function.

Master
Slave
Master
Slave

Communication ports that can be allocated

COM.0 COM.1 COM.2 COM.3 COM.4

●

● ● ● ● ●

● ● ● ● ●

● ● ● ● ●

● ● ● ● ●

● ● ● ● ●

1-3

Functions of Units and Restrictions on Combination

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1.2 Overview of Communication Functions

1.2.1 PLC Link Functions (MEWNET-W0)

 Overview of function

 A system can be configured for the PLC link (MEWNET-W0).
 Exclusive internal relays “link relays (L)” and data registers “link registers (LD)” are shared

between the connected PLCs.

 Among up to 16 PLCs, data can be exchanged with 1,008 link relay points and 128 link

register words.

 Applications of PLC Link Functions (MEWNET-W0)
Among our FP series PLC, it can be used for link functions with the following models. It is also

capable of 1:1 communication via RS-232C port.

 FP-X0 (L40MR / L60MR)
 FP0R (RS485 type)
 FPΣ (Using Communication cassette RS-485 type)
 FP-X (Using Communication cassette RS-485 type)
 FP2 Multi Communication Unit (Using Communication cassette RS-485 type)

1-4

1.2 Overview of Communication Functions

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1.2.2 MEWTOCOL Master/Slave Communication

 Overview of function

 Execute communication using MEWTOCOL-COM, a communication protocol used by our PLC.
 In master communication, PLC executes communication by sending commands to devices that

support MEWTOCOL, and receiving responses. Me ssages in accordance wit h the protocol are
automatically generated by PLC. In the user program, read ing and writin g can be done simply by
specifying the station no. an d memory a ddress an d executi ng SE ND/RECV instru ction s.

 Slave communication is performed when the computer or display connected to PLC has th e

sending right, and sends commands, and PLC returns responses. In slave communication, PLC
responds automatically, so no program concerning com mu nic ation i s necessary on the P LC side.

 The data size that can be sent or received in a single communication is up to 507 words for

register transmission (up to 1,014 words for MEWTOCOL7-COM) and 1 bit for bit transmission.

Master function

Slave function

 Examples of applications of MEWTOCOL master communication
This is used for connection with a device that supports our PLC's protocol MEWTOCO L.

 Programmable controller FP series
 Displacement sensor HL series
 Eco power meter KW series

 Examples of applications of MEWTOCOL slave communication
This is used for connection with a device that supports our PLC's protocol MEWT OCOL-COM

master communication.
 Programmable displays made by various manufacturers

1-5

Functions of Units and Restrictions on Combination

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1.2.3 MODBUS RTU Master/Slave Communication

 Overview of function

 This is used for communicating with other devices that support the MODBUS RTU protocol.
 In master communication, communication is performed when the master unit sends

instructions (command messages) to slave units and the slave unit returns responses
(response messages) according to t he instructions. Messages in accordance with the
protocol are automatically generated by PLC. In the user program, reading and writing can
be done simply by specifying the station no. and memory address and executing
SEND/RECV instructions.

 Slave communication is performed when the higher device connected to PLC has the

sending right, and sends commands, and PLC returns responses. In slave communication,
PLC responds automatically, so no program concerning comm unication is necessary on the
PLC side.

 The data size that can be sent or received in a single communication is up to 127 words for

register transmission and 2,040 bit for bit transmission.

Master function

Slave function

 Examples of applications of MODBUS-RTU master communication
This is used for connection with a device that supports the MODBUS-RTU protocol.

 Thermoregulator KT series
 Devices from other manufacturers that support MODBUS-RTU

 Examples of applications of MODBUS-RTU slave communication
This is used when access is made from the higher device using MODBUS-RTU commands.

1-6

1.2 Overview of Communication Functions

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1.2.4 General-Purpose Communication

 Overview of function

 General-purpose communication is used when PLC executes communication in accordan ce

with the protocol of the partner device.

 Formulation and sending of command messages to the partner device, and reception

processing of responses from the partner device, are performed by the user program.
Sending/receiving of data with an external device is executed via given operation memory
(e.g. data register).

 Data are sent by converting commands in accordance with the partner device as strings into

ASCII text, setting them into a given data register, and executing GPSEND instruction.

 Response received from the partner device is temporarily saved in the buffer. Based on the

reception done flag, GPRECV instruction is executed. The ASCII strings can be converted
into numerical data, etc. as necessary, by the user program.

 The data size that can be sent or received in a single communication is up to 4,096 bytes.

(including control codes)

 Applications of general-purpose communication
This is used for connection with devices made by differing manufacturers that have dedicated

communication protocols.

1-7

Functions of Units and Restrictions on Combination

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1.3 Restrictions on Units C ombination

1.3.1 Restrictions on the Number of Installed Units

There are following restrictions depending on units to be used.

Unit type Number of installed units Remarks

Serial Communication Unit Max. 8 units

1.3.2 Restrictions on the Combination of Extension Cassettes
(Communication Cassettes)

 One communication cassette can be attached to the CPU unit, and two communication

cassettes to the serial communication unit.

 The FP7 communication cassette (Ethernet type) can be attached to the CPU only. It cannot

be attached to the serial communication unit (SCU).

1.3.3 Restrictions on Communication Functions to be Used

There are the following restrictions on functions to be used when using the SCU or ET-LAN
that is built in the CPU unit, or the serial communication unit (SCU).

Function to be used Restrictions

Up to two communication ports can be used. For using two ports, allocate

PLC link function

MEWTOCOL-COM master
MODBUS-RTU master

MEWTOCOL-COM slave
MEWTOCOL7-COM slave
MODBUS-RTU slave

General-purpose
communication

different link areas to them.

CPU with built-in SCU (COM.1 port)
Serial communication unit (COM.1 port)

A maximum of 16 communication ports and the number of connections in
combination can be used simultaneously.

CPU with built-in SCU (COM.1 port to COM. 2 port)
Serial communication unit (COM.1 port to COM.4 port)
CPU with built-in ET-LAN (User connections 1 to 16)

A maximum of 15 communication ports and the number of connections in
combination can be used simultaneously.

CPU with built-in SCU (COM.1 port to COM. 2 port)
Serial communication unit (COM.1 port to COM.4 port)
CPU with built-in ET-LAN

(System connections 1 to 4 / User connections 1 to 16)

There is no restriction.

1.3.4 Unit to be Used and Applicable Versions o f CPU Unit and FPWIN GR 7

For using the unit, the following versions of CPU unit and FPWINGR7 are required.

Unit type

FP7 Serial Communication Unit Ver.1.2 or later Ver.1.3 or later

Applicable versions

CPU unit FPWINGR7

Remarks

1-8

1.3 Restrictions on Units Combination

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1.3.5 Restrictions on Consumption Current

Including other units, the consumption current should be within the allowable capacity of a
power supply unit.

 Unit's consumption current table (24 V)

Product name Model number

196k steps, Built-in Ethernet
function

CPU Unit

When attaching
Extension Cassette
(Communication
Cassette) to CPU
Unit
(Note 1) (Note 2)

Serial Communication Unit AFP7NSC 50 mA or less

When attaching
Extension Cassette
(Communication
Cassette) to Serial
Communication Unit
(Note 1) (Note 2)

(Note 1) The consumption currents listed in the Extension Cassette column indicate the increased amount of the

CPU's consumption current which increases when each extension cassette is added.

(Note 2) The consumption current of extension cassette (communication cassette) varies according to the unit to

which the cassette is attached (CPU or serial communication unit).

120k steps, Built-in Ethernet
function

120k steps, No Ethernet function AFP7CPS3 200 mA or less
RS-232C x 1ch AFP7CCS1 35 mA or less
RS-232C x 2ch AFP7CCS2 60 mA or less
RS-422 / 485 x 1ch AFP7CCM1 60 mA or less
RS-422 / 485 x 2h AFP7CCM2 90 mA or less
RS-232C x 1ch

RS-422 / 485 x 1ch
Ethernet AFP7CCET 35 mA or less

RS-232C x 1ch AFP7CCS1 20 mA or less
RS-232C x 2ch AFP7CCS2 40 mA or less
RS-422 / 485 x 1ch AFP7CCM1 30 mA or less
RS-422 / 485 x 2h AFP7CCM2 60 mA or less
RS-232C x 1ch

RS-422 / 485 x 1ch

AFP7CPS4E 200 mA or less

AFP7CPS3E 200 mA or less

AFP7CCS1M1 70 mA or less

AFP7CCS1M1 50 mA or less

Consumption

current (mA)

REFERENCE

For information on the restrictions on the combination of units, also refer to FP7 CPU
Unit User's Manual (Hardware).

1-9

Functions of Units and Restrictions on Combination

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1-10

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2

Names and Functions of

Parts

Names and Functions of Parts

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2.1 Names and Functions of Parts

2.1.1 Communication Port of CPU Unit

(In the above figure, a communication cassette is attached to the COM.1 and COM.2 ports.)

 Names and Functions of Parts

(1) COM.1 and COM.2 ports

Attach a separately sold communication cassette to use these ports. A blank cover is fitted
when the unit is shipped.

(2) COM.0 port, GT power supply terminals

This is an RS-232C port that is equipped to a standard model of CPU unit. It is equipped with
power supply terminals (5 VDC and 24 VDC) to which a GT series programmable display can
be connected.

(3) LAN port

This is equipped to a standard model of CPU unit. This is used for connection to Ethernet.

(4) USB port

This is equipped to a standard model of CPU unit. This is used for connecting tool software.

REFERENCE

 For details of the communication method using LAN port, refer to FP7 CPU

Unit User's Manual (LAN port communication).

 For details of the communication using Communication cassette (Ethernet

type) AFP7CCET, refer to FP7 series User's Manual (Communication
cassette Ethernet type).

2-2

2.1 Names and Functions of Parts

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2.1.2 Parts Names and Functions of Serial Communication Unit

(In the above figure, two communication cassettes are attached.)

 Names and Functions of Parts

(1) Operation monitor LEDs

Display

- Blue Lights when the power supply of the CPU unit is on.

ERROR Red

ALARM Red Lights when an error occurs in hardware.

LED
color

Description

Lights when the configuration setting is incorrect, or a communication error occurs.
Flashes when the factory acceptance test switch is on. (Flashing cycle: 100 ms)
Flashes when an extension cassette that cannot be used is installed. (Flashing

cycle: 500 ms)

(2) COM.1 and COM.2 ports

Attach a separately sold communication cassette to use these ports. No blank cover is fitted
when the unit is shipped.

(3) COM.3 and COM.4 ports

Attach a separately sold communication cassette to use these ports. A blank cover is fitted
when the unit is shipped.

(4) DIN hook

This is used to fix the unit to a DIN rail.

(5) Unit connector

This is used to connect the internal circuit of an I/O unit or advanced unit.

(6) Factory acceptance test switch

This is used for factory acceptance test. Do not turn it on.

2-3

Names and Functions of Parts

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2-4

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3

Wiring the COM. Port

Wiring the COM. Port

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3.1 Attaching a Communication Cassette

3.1.1 Attachment Instructions

When an optional Communication Cassette is to be used, attach it in the following procedures.

PROCEDURE

1. Using a flathead screwdriver, remove the cover on the side of the CPU unit.

You will find four toggles.

2. Attach a desired Communication Cassette.

The illustration is the CPU unit. As for the Serial Communication Unit, the
attachment procedure is the same.

3-2

3.2 Wiring of COM Port Terminal Block

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3.2 Wiring of COM Port Terminal Blo ck

3.2.1 Suitable Wires and Tools

A screw-down connection type for terminal block is used for the communication port. Use the
following items for wiring.

 Suitable wires (strand wire)

Size Nominal cross-sectional area

AWG #28 to 16 0.08 mm2 to 1.25 mm2

 Pole terminal with a compatible insulation sleeve

If a pole terminal is being used, the following models should be used.

Part no.
With insulating

sleeve

Without insulating
sleeve

Manufacturer

Phoenix Contact

Cross­sectional
area

0.25 mm2 AWG #24 AI 0.25-6 BU A 0.25-7

0.34 mm2 AWG #22 AI 0.34-6 TQ A 0.34-7

0.50 mm2 AWG #20 AI 0.5-6 WH A 0.5-6

0.75 mm2 AWG #18 AI 0.75-6 GY A 0.75-6

1.00 mm

Size

2

AWG #18 - A 1-6

 Pressure welding tool for pole terminals

Manufacturer

Phoenix Contact

Model no.
Part no. Product no.

CRIMPFOX 6 1212034

Screwdriver for terminal block

To tighten the terminals, use a screwdriver by Phoenix Contact (model No. SZS 0.4 x 2.5,
product No. 1205037, blade size 0.4 x 2.5) or our screwdriver (part No. AFP0806). The
tightening torque should be 0.22 to 0.25 N·m.

3-3

Wiring the COM. Port

-

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3.2.2 Applicable Cable

Use a cable as prescribed below.

 Suitable wires (strand wire): For RS-232C / RS-422 communication

Conductor Insulator

Classifi-

cation

Cross-sectional

view

Size

Resistance

value

(at 20°C)

Material

Thick-

ness

Cable
diam.

Sample

appropriate

cable

Shielded
multi-core
cable

Shield

Con­ductor

Cover

Insu­lator

0.3 mm2
(AWG22)
or larger

Max.

58.8 Ω/km

Vinyl
chloride

Max.

0.3 mm

 Suitable wires (strand wire): For RS-485 communication

Conductor Insulator

Classifi0c

ation

Cross-sectional

view

Size

Resistance

value

Material

Thick-

ness

(at 20°C)

2

Max.

16.8 Ω/km

Max.

33.4 Ω/km

2

Max.

25.1 Ω/km

Poly­ethylene

Poly­ethylene

Poly­chlorinated
biphenyl

Max.

0.5 mm

Max.

0.5 mm

Max.

0.6 mm

Shielded
twisted
pair

VCTF

Shield

Con­ductor

Con­ductor

NOTES

1.25 mm
(AWG16)

Cover

or larger

Insu­lator

0.5 mm2
(AWG20)
or larger

Cover

0.75 mm
(AWG18)

Insu
lator

or larger

 Use shielded twisted pair cables.
 Use only one type of transmission cable. Do not mix more than 1 type.
 Twisted pair cables are recommended in noisy environments.
 When using shielded cable with crossover wiring for the RS-485

transmission line, grounded one end.

Approx.

6.6 mm

Cable
diam.

Approx.

8.5 mm

Approx.

7.8 mm

Approx.

6.6 mm

Onamba Co. Ltd.
ONB-D6 × 0.3 mm

2

Sample

appropriate

cable

Hitachi Cable, Ltd.
KPEV-S1.25 mm
1P
Belden Inc., 9860

Hitachi Cable, Ltd.
KPEV-S0.5 mm
1P
Belden Inc., 9207

VCTF0.75 mm2 × 2C
(JIS)

2

×

2

×

3-4

3.2 Wiring of COM Port Terminal Block

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3.2.3 Wiring Method

 Wiring method

(1) Remove a portion of the wire’s insulation.

(2) Insert wire into terminal hole until it stops. Tighten screw clockwise to fix wire in place.
(The tightening torque: 0.22 to 0.25 N·m (2.3 to 2.5 kgf·cm))

 Precautions on wiring

The following precautions should be observed, to avoid broken or disconnected wire s.

 When removing the wire’s insulation, be careful not to scratch the core wire.
 Do not twist the wires to connect them.
 Do not solder the wires to connect them. The solder may break due to vibration.
 After wiring, make sure stress is not applied to the wire.
 In the terminal block socket construction, if the wire is fastened upon counter-clockwise

rotation of the screw, the connection is faulty. Disconnect the wire, check the terminal hole,
and then re-connect the wire.

3-5

Wiring the COM. Port

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3.3 Wiring for CPU Unit (GT Power Supply and COM0 Port)

3.3.1 Handling of GT Power Supply Terminals

 GT power supply terminals can be used as power supply terminals for the GT series of our

programmable displays.

 In accordance with the model to be used, use either 5V DC or 24V DC.

NOTES

 GT power supply terminals (5V DC / 24V DC) are design exclusively for the

GT series of our programmable displays. Do not use the terminals for other
devices.

 GT power supply terminals and COM0 port (RS-232C) are insulated inside.

3.3.2 Terminal Layouts and Examples of Wiring

 Layout for GT power supply terminals and COM0 port terminals

Terminal
no.

1 COM.0 SD Sent data

2 RD Received data
3 SG Signal Ground -

4 OUTPUT 24V 24V ­5 5V 5V ­6 0V 0V -

Terminal part
Symbol

Functions
that can be
allocated

Signal direction

PLC →
External device

PLC ←
External device

Ports that can be
allocated
in the software

COM.0

-

3-6

3.3 Wiring for CPU Unit (GT Power Supply and COM0 Port)

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 Example of wiring (in the case of GT02 5V DC type)

COM.0 port terminal / GT power supply terminal

FP7 CPU unit

Terminal

No.

4

GT power

supply

Terminal part symbolSignal name

COM.0

OUTPUT

SDSent Data 1
RDRecei ved Data2
SGSignal Ground3

24V

5V5
0V6

to GT +
terminal

to GT ­terminal

From 5 V

terminal

From 0 V

terminal

 Example of wiring (in the case of GT series 24V DC type)

COM.0 port terminal / GT power supply terminal

Terminal

No.

4

FP7 CPU unit

GT power

supply

Terminal part symbolSignal name

COM.0

OUTPUT

SDSent Data 1
RDRecei ved Data2
SGSignal Ground3

24V

5V5
0V6

From 24V

terminal

From 0V

terminal

to GT +
terminal

to GT ­terminal

GT02 / GT02L series

5V DC type

Terminal

part symbol

Signal name

Functional Ground

Sent Data SD

Received DataRD

Signal GroundSG

GT series

24V DC type

Terminal

part symbol

Signal name

Functional Ground

Sent Data SD

Received DataRD

Signal GroundSG

5 V+
0 V-

NCRS
NCCS

24V+

0V-

NCRS
NCCS

NOTE

 The terminal layout on the display side differs for the existing models GT01

series.

3-7

Wiring the COM. Port

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3.4

Wiring for Communication Cassettes COM.1 to COM.4 Ports

3.4.1 Communication Cassette AFP7CCS1
(RS-232C, 1-Channel Insulated Type)

 Terminal layout

Terminal
no.

1 CH1 SD SD SD: Sent Data

2 RD RD

3 - SG
4 - 9 - - - - -

(Note) Do not connect anything to Terminals No.4 through No.9.

LED part
Symbol

Terminal
part
Symbol

Functions
that can be
allocated

RD: Received
Data

SG: Signal
Ground

Signal
direction

PLC →
External device

PLC ←
External device

-

Ports that can be
allocated
in the software

COM.1

 Example of wiring

Terminal

No.

AFP7CCS1

Terminal

part symbol

Signal name

Sent Data 1

Received Data 1

Signal Ground

Functions

SDSD1
RDRD2
SGSG3

Partner

Signal nameSymbol

Received DataRD

Sent DataSD

Signal GroundSG

3-8

3.4 Wiring for Communication Cassettes COM.1 to COM.4 Ports

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3.4.2 Communication Cassette AFP7CCS2
(RS-232C, 2-channel insulated type)

 Setting of Application Switch

Applications for use can be switched using a switch on the backplane for Communication
Cassette AFP7CCS2. Settings can be confirmed with LED lamps at the front of the cassette.

3-wire 2-channel RS-232C
5-wire 1-channel RS-232C (RS/CS controlled)

3-9

Wiring the COM. Port

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 Terminal layout (in th e setting of 3-wire 2-channel RS-232C)

Terminal
no.

1 CH1 SD SD SD: Sent Data

2 RD RD

3 - SG

4 CH2 SD / R SD SD: Sent Data

5 RD / C RD

6 - SG
7 MODE - - - -

8 3-Wire - - - ­9 5-Wire - - - -

(Note 1) Route between CH1 and CH2 are insulated inside.
(Note 2) Do not connect anything to Terminals No.7 through No.9.

LED part
Symbol

Terminal
part
Symbol

Functions
that can be
allocated

RD: Received
Data

SG: Signal
Ground

RD: Received
Data

SG: Signal
Ground

Signal
direction

PLC →
External device

PLC ←
External device

­PLC →

External device
PLC ←

External device

-

Ports that can be
allocated
in the software

COM.1

COM.2

 Example of wiring (in the setting of 3-wire 2-channel RS-232C)

Terminal

No.

Terminal

part symbol

AFP7CCS2

Signal name

Sent Data 1

Received Data 1

Signal Ground

Sent Data 2

Received Data 2

Signal Ground

Functions

SDSD1
RDRD2
SGSG3
SDSD4
RDRD5
SGSG6

Partner 1

Signal nameSymbol

Received DataRD

Sent DataSD

Signal GroundSG

Partner 2

Signal nameSymbol

Received DataRD

Sent DataSD

Signal GroundSG

3-10

3.4 Wiring for Communication Cassettes COM.1 to COM.4 Ports

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 Terminal layout (in th e setting of 5-wire 1-channel RS-232C RS/CS controlled)

Terminal
no.

1 CH1 SD SD SD: Sent Data

2 RD RD

3 - SG

4 CH2 SD / R SD

5 RD / C RD
6 - SG - - -

7 MODE - - - ­8 3-Wire - - - ­9 5-Wire - - - -

(Note) Do not connect anything to Terminals No.6 through No.9.

LED part
Symbol

Terminal
part
Symbol

Functions
that can be
allocated

RD: Received
Data

SG: Signal
Ground

RS: Request to
Send

CS: Clear to
Send

Signal
direction

PLC →
External device

PLC ←
External device

­PLC →

External device
PLC ←

External device

Ports that can be
allocated
in the software

COM.1

 Example of wiring (in the setting of 5-wire 1-channel RS-232C RS/CS controlled)

Terminal

No.

AFP7CCS2

Terminal

part symbol

Signal name

Sent Data
Received Data
Signal Ground

Request to Send

Clear to Send

Functions

SDSD1
RDRD2
SGSG3
RSSD4
CSRD5

Symbol

RD
SD
SG
RS
CS

Partner

Signal name

Received Data

Sent Data

Signal Ground

Request to Send

Clear to Send

3-11

Wiring the COM. Port

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3.4.3 Communication Cassette AFP7CCM1
(RS-422 / RS-485, 1-Channel Insulated Type)

 Setting of application switch

Applications for use can be switched using a switch on the backplane for Communication
Cassette AFP7CCM1. Settings can be confirmed with LED lamps at the front of the cassette.

 Settings for termination resistance selector switch

On the surface of Communication Cassette AFP7CCM2 is located a termination resistance
selector switch.

 When RS-422 is used: Turn ON the switch.
 When RS-485 is used: Turn ON the switch only when it is the end unit.

3-12

3.4 Wiring for Communication Cassettes COM.1 to COM.4 Ports

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 Terminal layout (in th e setting of RS-485)

Terminal
no.

1 CH1 SD + / S Transmission line (+) ­2 RD - / S Transmission line (-) ­3 485 + / R Transmission line (+) ­4 422 - / R Transmission line (-) ­5 - 9 - - - - -

(Note 1) In the setting of RS-485, Terminal No.1 and Terminal No.3, and Terminal No.2 and Terminal No.4 are

respectively connected inside. They can be used as terminals for crossover wiring for the transmission cable.

(Note 2) Do not connect anything to Terminals No.5 through No.9.

LED part
Symbol

Terminal
part
Symbol

Functions that can
be allocated

Signal
direction

Ports that can be
allocated
in the software

COM.1

 Example of wiring (in the setting of RS-485)

AFP7CCM1

No.

Terminal part

symbol

Signal name

Transmission line (+)

Transmission line (-)

Transmission line (+)

Transmission line (-)

Functions

++ / S1

--/ S2

++ / R3

--/ R4

Terminal

Terminal

+

-

Terminal

+

-

Partner 1

Signal name

Transmission line (+)

Transmission line (-)

Partner 2

Signal name

Transmission line (+)

Transmission line (-)

3-13

Wiring the COM. Port

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 Terminal layout (in th e setting of RS-422)

Terminal
no.

1 CH1 SD + / S Sent Data (+)

2 RD - / S Sent Data (-)

3 485 + / R Received Data (+)

4 422 - / R Received Data (-)
5 - 9 - - - - -

(Note) Do not connect anything to Terminals No.5 through No.9.

LED part
Symbol

Terminal
part
Symbol

Functions that
can be
allocated

Signal
direction

PLC →
External device

PLC →
External device

PLC ←
External device

PLC ←
External device

Ports that can be
allocated
in the software

COM.1

 Example of wiring (in the setting of RS-422)

AFP7CCM1

No.

Terminal part

symbol

Signal name

Sent Data (+)

Sent Data (-)

Received Data (+)

Received Data (-)

Functions

SD (+)+ / S1

SD (-)-/ S2

RD (+)+ / R3

RD (-)-/ R4

Terminal

Terminal

RD (+)

RD (-)

SD (+)

SD (-)

Partner

Signal name

Received Data (+)

Received Data (-)

Sent Data (+)
Sent Data (-)

3-14

3.4 Wiring for Communication Cassettes COM.1 to COM.4 Ports

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3.4.4 Communication Cassette AFP7CCM2
(RS-422 / RS-485, 2-Channel Insulated Type)

 Setting of application switch

Applications for use can be switched using a switch on the backplane for Communication
Cassette AFP7CCM2. Settings can be confirmed with LED lamps at the front of the cassette.

 Settings for termination resistance selector switch

On the surface of Communication Cassette AFP7CCM2 is located a termination resistance
selector switch.

 When RS-422 is used: Turn ON the switch.
 When RS-485 is used: Turn ON the switch only when it is the end unit.

3-15

Wiring the COM. Port

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 Terminal layout (in th e setting of RS-485)

Terminal
no.

1 CH1 SD + / S Transmission line (+) ­2 RD - / S Transmission line (-) ­3 485 + / R Transmission line (+) ­4 422 - / R Transmission line (-) ­5 - - - - ­6 CH2 SD + / S Transmission line (+) ­7 RD - / S Transmission line (-) ­8 485 + / R Transmission line (+) ­9 422 - / R Transmission line (-) -

(Note 1) In the setting of RS-485, Terminal No.1 and Terminal No.3, and Terminal No.2 and Terminal No.4 are

respectively connected inside. They can be used as terminals for crossover wiring for the transmission cable.

(Note 2) In the setting of RS-485, Terminal No.6 and Terminal No.8, and Terminal No.7 and Terminal No.9 are

respectively connected inside. They can be used as terminals for crossover wiring for the transmission cable.
(Note 3) Do not connect anything to Terminal No.5.
(Note 4) Route between CH1 and CH2 are insulated inside.

LED part
Symbol

Terminal
part
Symbol

Functions that can
be allocated

Signal
direction

Ports that can
be allocated
in the software

COM.1

COM.2

3-16

3.4 Wiring for Communication Cassettes COM.1 to COM.4 Ports

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 Example of wiring (in the setting of RS-485)

Terminal

No.

5

AFP7CCM2

Terminal

part symbol

－

Signal name

Transmission line 1 (+)

Transmission line 1 (-)

Transmission line 1 (+)

Transmission line 1 (-)

NC

Transmission line 2 (-)

Functions

++ / S1

--/ S2

++ / R3

--/ R4

NC

+Transmission line 2 (+)+ / S6

-Transmission line 2 (-)-/ S7

+Transmission line 2 (+)+ / R8

--/ R9

Transmission line 1 Partner 1

Terminal

+

-

Signal name

Transmission line (+)
Transmission line (-)

Transmission line 1 Partner 2

Terminal

+

-

Signal name

Transmission line (+)

Transmission line (-)

Transmission line 2 Partner 1

Terminal

+

-

Signal name

Transmission line (+)

Transmission line (-)

Transmission line 2 Partner 2

Terminal

+

-

Signal name

Transmission line (+)

Transmission line (-)

3-17

Wiring the COM. Port

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 Terminal layout (in th e setting of RS-422)

Terminal
no.

1 CH1 SD + / S Sent Data (+)
2 RD - / S Sent Data (-)
3 485 + / R Received Data (+) PLC ← External device
4 422 - / R Received Data (-) PLC ← External device
5 - - - - ­6 CH2 SD + / S Sent Data (+)
7 RD - / S Sent Data (-)
8 485 + / R Received Data (+) PLC ← External device
9 422 - / R Received Data (-) PLC ← External device

(Note 1) Do not connect anything to Terminal No.5.
(Note 2) Route between CH1 and CH2 are insulated inside.

LED part
Symbol

Terminal
part
Symbol

Functions that
can be allocated

Signal direction

PLC → External device
PLC → External device

PLC → External device
PLC → External device

Ports that can be
allocated
in the software

COM.1

COM.2

 Example of wiring (in the setting of RS-422)

AFP7CCM2

No.

5

Terminal

part symbol

－

Signal name

Sent Data 1 (+)

Sent Data 1 (-)
Received Data 1 (+)
Received Data 1 (-)

Received Data 2 (-)

Functions

SD (+)+ / S1

SD (-)-/ S2

RD (+)+ / R3

RD (-)-/ R4

SD (+)Sent Data 2 (+)+ / S6

SD (-)Sent Data 2 (-)-/ S7

RD (+)Received Data 2 (+)+ / R8

RD (-)-/ R9

Terminal

Terminal

RD (+)
RD (-)
SD (+)
SD (-)

Terminal

RD (+)

RD (-)

SD (+)

SD (-)

Partner 1

Signal name

Received Data (+)
Received Data (-)

Sent Data (+)
Sent Data (-)

Partner 2

Signal name

Received Data (+)

Received Data (-)

Sent Data (+)

Sent Data (-)

3-18

3.4 Wiring for Communication Cassettes COM.1 to COM.4 Ports

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3.4.5 Communication Cassette AFP7CCS1M1 (RS-232C 1-Channel + RS-485
1-Channel Insulated Type)

 Settings for termination resistance selector switch

A termination resistance selector switch is locate d on the RS-485 side of the surface of
Communication Cassette AFP7CCS1M1. Turn ON the switch only when it is the end unit.

Terminal
no.

1 CH1 SD + Transmission line (+) ­2 RD - Transmission line (-) ­3
4
5 - 6
7 CH2 SD SD Sent data ­8 RD RD Received data ­9 SG SG Signal ground -

(Note 1) Terminal No.1 and Terminal No.3, and Terminal No.2 and Terminal No.4 are respectively connected inside.
(Note 2) Do not connect anything to Terminals No.5 and No.6.

LED part
Symbol

-

Terminal
part
Symbol

+ Transmission line (+) -

- Transmission line (-) -

- - - -

Functions that
can be allocated

Signal
direction

Ports that can be
allocated
in the software

COM.1

COM.2

3-19

Wiring the COM. Port

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 Example of wiring

Terminal

No.

5
6

AFP7CCS1M1

Terminal

part symbol

－

－

Signal name

Transmission line (+)

Transmission line (-)

Transmission line (+)

Transmission line (-)

NC

Signal Ground

Functions

++ / S1

--/ S2

++ / R3

--/ R4
NC
NCNC
SDSent DataSD7
RDReceived DataRD8
SGSG9

RS-485 Partner 1

Terminal

+

-

Signal name

Transmission line (+)

Transmission line (-)

RS-485 Partner 2

Terminal

+

-

Signal name

Transmission line (+)

Transmission line (-)

RS-232C partner

Terminal

RD

SG

Signal name

Received Data

Sent DataSD

Signal Ground

3-20

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3

I/O Allocation

I/O Allocation

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4.1 Input/Output Signals Used for Communication

4.1.1 I/O Allocation of CPU Unit

 Input signal

Input

signal

X0 For COM.1 Port
X1 For COM.2 Port

X2 For COM.0 Port
X3 - Not used Do not use this.

X4 For COM.1 Port

X5 For COM.2 Port

X6 For COM.0 Port
X7 - Not used Do not use this.

X8 For COM.1 Port
X9 For COM.2 Port

XA For COM.0 Port
XB - Not used Do not use this.

XC For COM.1 Port
XD For COM.2 Port
XE For COM.0 Port

XF - Not used Do not use this.
X10 For COM.1 Port

X11 For COM.2 Port
X12 For COM.0 Port

X13

X14 For COM.1 Port

X15

- X1F

(Note 1) The general-purpose communication reception done (copy) flag is effective after the execution of the RECV

Communication

port

- Not used Do not use this.

- Not used Do not use this.

instruction until one of the following instructions is executed. This flag does not remain ON across several scans.
Execute 1: END instruction (scan header), and 2: RECV instruction

Name Description

General­purpose
communication
Reception
done flag

General­purpose
communication
Reception
done (copy)
flag

General­purpose
communication
Clear to send
flag

Master
communication
Clear to send
flag

Reset done

CTS signal
monitor

When the unit completes the data reception,
it turns on (1).

Waiting for data reception: 0, Reception
completed: 1

It turns on (1) if there are copied data when
GPRECV instruction is executed. It turns off
(0) when END instruction is executed.
(Note 1)
Reading completed: 1
No data to be read: 0

It turns on (1) when the unit is set to the
general-purpose communication mode. It
turns off (0) in other modes.

It turns on (1) when the unit is set to modes
other than the PLC link mode or general­purpose communication mode. It turns off (0)
in other modes.

When the communication channel is reset
under the output Y10 - Y12, the flag is
turned on (1) once the resetting operation is
completed.
Resetting done: 1
Y10 - Y12 is off: 0

Status of the CTS signal sent from the
device communicating with.

Clear to send from COM.1 port = 0
Cannot send from COM.1 port = 1

The RTS signal can be controlled with Y14.

Effective

operation

mode

General­purpose
communication

General­purpose
communication

General­purpose
communication

MEWTOCOL
MODBUS-RTU

General­purpose
communication

When RS/CS is
set to valid in
Communication
Block COM.1.

4-2

4.1 Input/Output Signals Used for Communication

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 Output signal

Output

signal

Y0 For COM.1 Port
Y1 For COM.2 Port

Y2 For COM.0 Port
Y3

- Y7
Y8 For COM.1 Port

Y9 For COM.2 Port
YA For COM.0 Port

YB - Undefined
YC For COM.1 Port

YD For COM.2 Port
YE For COM.0 Port

YF - Undefined

Y10 For COM.1 Port

Y11 For COM.2 Port

Y12 For COM.0 Port

Y13 - Undefined

Y14 For COM.1 Port

Y15 ­Y1F

(Note 1) When transmission is completed within one scan, it turns off when the GPSEND instruction is executed in

Communication

port

- Undefined

- Undefined

the subsequent scan.

Name Description

Sending done
result

General­purpose
communication
Sending active
flag

Master
communication
Sending active
flag

Request to
reset CH

Output RTS
signal

Reports the results of sending in master
communication or general-purpose
communication.
Normal completion: 0, Abnormal completion:
1

Do not turn on "undefined". (Default setting is

0.)
It turns on (1) during sending in the general-

purpose communication mode.
（Note 1）
Sending done: 0, Sending: 1

Do not turn on "undefined". (Default setting is

0.)
It turns on (1) during sending in the master

communication mode.
Sending done: 0, Sending: 1

Do not turn on "undefined". (Default setting is

0.)
By turning on (1) Y10 - Y12, the

communication channel can be reset.
Without a request to reset = 0, With a
request to reset = 1
After ON (1) is output and the completion of
the reset is confirmed by X10 - X12, return to
OFF (0). The reset is performed only once
when this signal rises.
This function can be used to delete
unnecessary received data or to clear errors
before starting normal reception.
1:Sending canceled
2:Reception canceled
3:Re-set communication parameters
4:Clear error information (only for errors that
can be cleared)

Do not turn on "undefined". (Default setting is

0.)
By turning on (1) this output, RTS is

controlled.
Transmission from the device communicating
with is permitted = 0
Transmission from the device communicating
with is prohibited = 1
Monitor the CTS signal from the device
communicating with using X14.

Do not turn on "undefined". (Default setting is

0.)

Effective

operation

mode

MEWTOCOL
MODBUS-RTU
General­purpose
communication

General­purpose
communication

MEWTOCOL
MODBUS-RTU

General­purpose
communication

When RS/CS is
set to valid in
Communication
Cassette
COM.1

-

NOTE

 Each contact in the table above is used for reading the operation status. Do

not write over it with a user program. (excluding Y10 - Y12 and Y14)

4-3

I/O Allocation

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4.1.2 I/O Allocation of Serial Commun ication Unit

 Input signal

Input

signal

X0 For COM.1 Port
X1 For COM.2 Port
X2 For COM.3 Port
X3 For COM.4 Port

X4 For COM.1 Port
X5 For COM.2 Port
X6 For COM.3 Port
X7 For COM.4 Port

X8 For COM.1 Port
X9 For COM.2 Port
XA For COM.3 Port
XB For COM.4 Port

XC For COM.1 Port
XD For COM.2 Port
XE For COM.3 Port

XF For COM.4 Port
X10 For COM.1 Port
X11 For COM.2 Port
X12 For COM.3 Port
X13

X14 For COM.1 Port

X16 For COM.3 Port

X15,
X17

- X1F

(Note 1) The general-purpose communication reception done (copy) flag is effective after the execution of the RECV

(Note 2): The I/O numbers actually allocated are the numbers based on the starting word number allocated to the unit.

Communication

port

For COM.4 Port

- Not used Do not use this.

instruction until one of the following instructions is executed. This flag does not remain ON across several scans.
Execute 1: END instruction (scan header), and 2: RECV instruction

Example) When the starting word number for the unit is "10", the general-purpose communication reception
done flag for COM.1 port is X100.

Name Description

General­purpose
communication
Reception
done flag

General­purpose
communication
Reception
done (copy)
flag

General­purpose
communication
Clear to send
flag

Master
communication
Clear to send
flag

Reset done

CTS signal
monitor

When the unit completes the data reception,
it turns on (1).

Waiting for data reception: 0, Reception
completed: 1

It turns on (1) if there are copied data when
GPRECV instruction is executed. It turns off
(0) when END instruction is executed.
(Note 1)
Reading completed: 1
No data to be read: 0

It turns on (1) when the unit is set to the
general-purpose communication mode. It
turns off (0) in other modes.

It turns on (1) when the unit is set to modes
other than the PLC link mode or general­purpose communication mode. It turns off (0)
in other modes.

When the communication channel is reset
under the output Y10 - Y13, the flag is
turned on (1) once the resetting operation is
completed.
Resetting done: 1
Y10 - Y12 is off: 0

Status of the CTS signal sent from the
device communicating with.

Clear to send from COM.1/COM.3 port = 0
Cannot send from COM.1/COM.3 port = 1
The RTS signal can be controlled with
Y14/Y16.

Effective

operation

mode

General­purpose
communication

General­purpose
communication

General­purpose
communication

MEWTOCOL
MODBUS-RTU

General­purpose
communication

When RS/CS is
set to valid in
Communication
Cassette
COM.1/COM.3

4-4

4.1 Input/Output Signals Used for Communication

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 Output signal

Output

signal

Y0 For COM.1 Port
Y1 For COM.2 Port
Y2 For COM.3 Port

Y3 For COM.4 Port
Y4

- Y7
Y8 For COM.1 Port

Y9 For COM.2 Port
YA For COM.3 Port

YB For COM.4 Port
YC For COM.1 Port
YD For COM.2 Port

YE For COM.3 Port
YF For COM.4 Port

Y10 For COM.1 Port

Y11 For COM.2 Port

Y12 For COM.3 Port

Y13 For COM.4 Port

Y14 For COM.1 Port

Y16 For COM.3 Port

Y15
Y17

- Y1F

(Note 1) When transmission is completed within one scan, it turns off when the GPSEND instruction is executed in

(Note 2): The I/O numbers actually allocated are the numbers based on the starting word number allocated to the unit.

Communication

port

- Undefined

- Undefined

the subsequent scan.

Example) When the starting word number for the unit is "10", the sending done result flag for COM.1 port is
Y100.

Name Description

Reports the results of sending in master

Sending done
result

General­purpose
communication
Sending active
flag

Master
communication
Sending active
flag

Request to
reset CH

Output RTS
signal

communication or general-purpose
communication.
Normal completion: 0, Abnormal completion:
1

Do not turn on "undefined". (Default setting is

0.)
It turns on (1) during sending in the general-

purpose communication mode.
(Note 1)
Sending done: 0, Sending: 1

It turns on (1) during sending in the master
communication mode.
Sending done: 0, Sending: 1

By turning on (1) Y10 - Y13, the
communication channel can be reset.
Without a request to reset = 0, With a request
to reset = 1
After ON (1) is output and the completion of
the reset is confirmed by X10 - X13, return to
OFF (0). The reset is performed only once
when this signal rises. This function can be
used to delete unnecessary received data or
to clear errors before starting normal
reception.
1:Sending canceled
2:Reception canceled
3:Re-set communication parameters
4:Clear error information (only for errors that
can be cleared)

By turning on (1) this output, RTS is
controlled.
Transmission from the device communicating
with is permitted = 0
Transmission from the device communicating
with is prohibited = 1
Monitors the CTS signal from the device
communicating with using X14/X16.

Do not turn on "undefined". (Default setting is

0.)

Effective

operation

mode

MEWTOCOL
MODBUS-RTU
General­purpose
communication

General­purpose
communication

MEWTOCOL
MODBUS-RTU

General­purpose
communication

When RS/CS is
set to valid in
Communication
Cassette
COM.1/COM.3

-

NOTE

 Each contact in the table above is used for reading the operation status. Do

not write over it with a user program. (excluding Y10 - Y14 and Y16)

4-5

I/O Allocation

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4.2 Registration in I/O Map

4.2.1 Settings Using FPWIN GR7 (For CPU with built- in SCU)

 For the CPU with built-in SCU, there is no need to set with FPWIN GR7 because the

following fixed areas are allocated.

No. of occupied words

Unit type Model number

CPU Unit CPU with built-in SCU Common

4.2.2 Settings Using FPWIN GR7 (For Serial Communica tion Unit)

The explanation below shows the case that the serial communication unit is registere d in the
slot number 1.

(No. of occupied points)

Input Output

2 words (32 points)
WX0 - WX1 Fixed

2 words (32 points)
WY0 - WY1 Fixed

PROCEDURE

1. Select "Options" > "FP7 Configuration" in the menu bar.

The "FP7 Configuration" dialog box appears.

2. Select "I/O map" in the left pane.

The "I/O map" dialog box is displayed.

3. Double-click Slot No. 0.

The "Unit selection [Slot No. 0]" dialog box is displayed.

4. Select "CPU unit" for Unit type, and select a CPU unit used for Unit name,
and press [OK] button.

The CPU unit is registered. Only CPU unit can be registered in Slot No. 0. Slot
No.1 and subsequent numbers cannot be set unless Slot No. 0 is set.

4-6

5. Double-click Slot No. 1 in the "I/O map" dialog box.

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The "Unit selection [Slot No. 1]" dialog box is displayed.

4.2 Registration in I/O Map

6. Select "Communications" for Unit type, and select "SCU unit" for Unit name,
and press [OK] button.

"SCU unit" is registered in the I/O map.

The set conditions are reflected in the project being edited.

4-7

I/O Allocation

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4-8

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5

Setting and Confirming

Communication Conditions

Setting and Confirming Communication Conditions

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5.1 Setting Applications and Communication Conditions

5.1.1 Applications to be Set for Each Port

 Available functions for each communication port

Communication function to be used

PLC link
MEWTOCOL7－COM (Note 1)

MEWTOCOL－COM

MODBUS-RTU

General-purpose communication

(Note 1) In MEWTOCOL7-COM, there is no master communication function.

Master
Slave
Master
Slave

COM.0 COM.1 COM.2 COM.3 COM.4

5.1.2 Conditions to be Set for Each Port

 Communication condition

Communication port Setting range Default

1 - 99 (MEWTOCOL-COM)

Station no.

Baud rate 300,600,1200,2400,4800,9600,19200,38400,57600,115200,230400 9600

Data length 7 bits, 8 bits 8 bits
Parity None, Odd, Even Odd

Communica
tion format

RS/CS controlled No/Yes Invalid
Send Waiting 0 to 100 ms 0 ms
Modem initialization Invalid, Valid, Re-initialization Invalid

(Note) Communication conditions that can be set vary by the mode to be used (PLC link, MEWTOCOL

communication, MODBUS-RTU, general-purpose communication).

Stop bit 1 bit, 2 bits 1 bit
End code CR, CR+LF, ETX , or time (0.01 ms – 100 ms, by the unit of 0.01 ms) CR

Start code With STX, Without STX

1 - 999 (MEWTOCOL7-COM)
1 - 247 (MODBUS-RTU)

Allocated communication port

●

● ● ● ● ●

● ● ● ● ●

● ● ● ● ●

● ● ● ● ●

● ● ● ● ●

1

Without
STX

5-2

5.2 Setting Communication Conditions

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5.2 Setting Communication Conditions

5.2.1 Settings Using FPWIN GR7 (For CPU with built- in SCU)

Applications and communication conditions for each communication port should be set using
the tool software FPWIN GR7.

PROCEDURE

1. From the menu bar, select "Option" > "FP7 Configuration".

The "FP7 Configuration" dialog box opens.

2. Select "Built-in SCU".

Setting items for "Built-in SCU" appear.

3. Specify communication conditions and press [O K] button.

Set conditions are incorporated into the project that is being edited.

5-3

Setting and Confirming Communication Conditions

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5.2.2 Settings Using FPWIN GR7 (For Serial Communica tion Unit)

 Applications and communication conditions for each communication port should be set using

the tool software FPWIN GR7.

 The explanation below shows the case that the serial communication unit is registered in the

slot number 1.

PROCEDURE

1. Select "Options" > "FP7 Configuration" in the menu bar.

The "FP7 Configuration" dialog box appears.

2. Select "I/O map" in the left pane.

The "I/O map" dialog box is displayed.

3. Select the Slot No. in which SCU unit is registered in the "I/O map" dialog box,
and press the "Advanced" button.

The "SCU Unit Settings" dialog box is displayed.

4. Select COM No. in the left pane.

Setting items available for each COM. number are displayed.

5. Set communication conditions, and press [OK] button.

The set conditions are reflected in the project being edited.

5-4

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6

PLC Link

PLC Link

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6.1 Operation of PLC link MEWNET-W 0

6.1.1 Overview of PLC Link Operation

 “Link relays (L)” and data registers “link registers (LD)” are shared between the connected

PLCs.

 If the link relay contact for one PLC goes on, the same link relay also goes on in each of the

other PLCs connected to the network.

 Likewise, if the contents of a link register are rewritten in one PLC, the change is made in the

same link register of each of the other PLCs connected to the network.

(Station no.1) (Station no.2) (Station no.3) (Station no.4)

Send area

Receive area

No.1 No.1 No.1

No.2

Receive area

Send area

Receive area

No.2 No.2

Receive area

Send area

No.3No.3No.3

Receive area

PLC PLC PLC PLC

RS485

6-2

6.1 Operation of PLC link MEWNET-W0

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6.1.2 Operation of Link Relays and Link Registers

 Link relay

If the link relay L0 in unit No.1 is turned on, the status change is fed back to the link relay L0
with the same number in other units, and R0 in the other units is output.

R0

L0

L0

Y0

L0

Y0

L0

Y0

PLC PLC PLC PLC

RS485

R0

F0, MV, K10 0 , LD0

No.1 Link register

LD 0 100

No.2 Link register

LD 0 100 LD 0 100 LD 0 100

 Link register

If the constant 100 is written into LD0 of the source station no.1, LD0 of the other station no.2
is also changed to the constant 100.

No.3 Link register No.4 Link register

6-3

PLC Link

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6.2 Configuration Required for PLC Link

6.2.1 Setup Procedure (For CPU with built-in SCU)

 In order to use the PLC link function, setting of communication conditions and allocation of

memories are required.

 Settings should be performed by the programming tool FPWIN GR7.

PROCEDURE

1. From the menu bar, select "Option" > "FP7 Configuration".

The "FP7 Configuration" dialog box appears.

2. From the left pane of the dialog box, select "Built-in SCU".

Setting items for each COM port are displayed.

3. Select "PLC link" from "Communication mode" in setting items under "COM1

settings".

Setting items for PLC link become valid.

4. Specify conditions to be allocated to each setting item for "Station no." and

"PLC link settings" under "COM1 settings", and press [OK] button.

The settings are registered in the project.

6-4

6.2 Configuration Required for PLC Link

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6.2.2 Setup Procedure (For Serial Communication Unit )

 In order to use the PLC link function, setting of communication conditions and allocation of

memories are required.

 Settings should be performed by the programming tool FPWIN GR7.
 The following procedure describes the case that the serial communication unit has been

already registered in the I/O map.

PROCEDURE

1. Select "Options" > "FP7 Configuration" in the menu bar.

The "FP7 Configuration" dialog box appears.

2. From the left pane of the dialog box, select “I/O map”.

The "I/O map" dialog box is displayed.

3. Select a unit used for PLC link, and press [Advanced] button.

The "SCU Unit Settings" dialog box is displayed.

4. Select "COM.1 settings" from the left pane, and select "PLC link" in
"Communication mode".

差し替え

5. Set conditions assigned to each item in "PLC link settings", and press [OK]
button.

The settings are registered in the project.

REFERENCE

For details of PLC link settings, please see explanation on the next page onward.

6-5

PLC Link

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6.2.3 List of Setting Items

 List of setting items (COM1 settings)

Setting items

Communication mode PLC link
Station no. 1 - 16
Baud rate 115200 bps

Data length 8 bit
Parity Odd
Stop bit 1 bit
RS/CS Invalid
Send waiting time 0
Start code STX Invalid
Terminator setting CR
Terminator judgment time 0
Modem initialization Do not initialize

 List of setting items (PLC link settings)

Setting items Setting range Setting method

Memory block numbers for link relays and
link registers to be used

Maximum station no. to be used for PLC
link

Range of link relays used 0 to 64 words
Range of link registers used 0 to 128 words
Starting no. for link relay send area 0 to 63
Size of link relay send area 0 to 64 words
Starting No. for link register send area 0 to 127
Size of link register send area 0 to 127 words

Settings when the PLC link
function is used

0 or 1

0 to 16

Remark

Set a specific station no. for PLC to be
connected to the PLC link.

Regardless of settings in FPWIN GR7,
the FP7 CPU unit itself performs automatic

settings.

Specify the device No. range for link relays
and link registers to be used in a block.

Set the Max. station no. for PLC to be
connected to the PLC link.

Specify the device No. range for link relays
and link registers to be used.

NOTE

 When you want to change the communication mode set in the PLC link to

another mode, download the changed project to the CPU unit in FPWIN GR7,
and turn on power to the FP7 CPU unit again.

6-6

6.3 Setting Items for PLC Link

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6.3 Setting Items for PLC Link

6.3.1 Station No. Setting

 In the PLC link where multiple PLCs are connected to the transmission line, station no.

should be set to identify each PLC.

 Station nos. are the numbers to identify the different PLCs on the same network. The same

number must not be used for more than one PLC on the same network.

6.3.2 Max. Station No. Setting

 Set the Max. station no. for PLC to be connected to the PLC link.
 The smaller the Max. station no. is, the shorter the relative transmission time becomes.

NOTES

 Station nos. should be set sequentially and consecutively, starting from 1,

 Set the same value for the Max. station no. for all PLCs connected to the

with no breaks between them. If there is a missing station no., the
transmission time will be longer.

same PLC link.

6-7

PLC Link

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6.3.3 Memory Block Numbers for Link Relays and Link Regist ers to be Used

 The memory area of link relays and link registers are divided into the area for PLC link 0 and

the area for PLC link 1, which can respectively use up to 1024 link relay points (64 words)
and up to 128 link register words.

 Specify "0" when the former memory block is used, and specify "1" when the latter memory

block is used.

Configuration of link area

6.3.4 Range of Use of Link Relays and Range of U se of Link Registers

 Specify the memory area range for link relays and link registers to be used.
 Link relays and link registers that do not use the link function can be used in place of internal

relays and data registers.

E.g. Examples of setting the range of use (in the case of PLC link 0)

 The figure below indicates a case where the link relay range of use is set to "50" (50 words,

WL0 - WL49) and the link register range of use is set to "100" (100 words, LD0 - LD99).

 If all the link relays are used in the PLC link 0 area, set the link relay range of use to "64" (64

words), and all the link register range of use to "128" (128 words).

6-8

6.3 Setting Items for PLC Link

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6.3.5 Starting No. for Link Relay Send Area and Sending Size

 The memory areas for link relays are divided into send areas and receive areas.
 The link relays are transmitted from the send area to the receive area of a different PLC.

Link relays with the same numbers as those on the sending side must exist in the receive
area on the receiving side.

E.g. Example of setting the starting No. for link relay send area and the sending size (in
the case of memory block No.0)

 List of setting items (PLC link settings)

Setting items

Memory block numbers for link
relays and link registers to be
used

Maximum station no. to be used
for PLC link

Range of link relays used
Starting no. for link relay send

area
Size of link relay send area

Setting
range

0 or 1 0 0 0 0

0 to 16
0 to 64

words
0 to 63

0 to 64
words

No.1 No.2 No.3 No.4

Station no. and setting method

4 4 4 4

64 64 64 64

0 20 40 0

20 20 24 0

6-9

PLC Link

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6.3.6 Starting No. for Link Register Send Area and Sending Size

 The memory areas for link registers are divided into send areas and receive areas.
 The link registers are sent from the send area to the receive area of a different PLC. Link

registers with the same numbers as those on the sending side must exist in the receive area
on the receiving side.

E.g. Example of setting the starting No. for link register send area and the sending size
(in the case of memory block No.0)

 List of setting items (PLC link settings)

Setting items

Memory block numbers for link
relays and link registers to be used

Maximum station no. to be used for
PLC link

Range of link registers used for
PLC link

Starting No. for link register send
area

Size of link register send area

Setting
range

0 or 1

0 to 16
0 to 128

words
0 to 127

0 to 127
words

Station no. and setting method

No.1 No.2 No.3 No.4

0 0 0 0

4 4 4 4

128 128 128 128

0 40 80 0

40 40 48 0

NOTES

 If a mistake is made when allocating a link area, be aware that an error will

result, and communication will be disabled.

 Avoid overlapping send areas.

6-10

6.3 Setting Items for PLC Link

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In the example shown below, there is an area between No. 2 and No. 3 link relays
which is overlapped, and this will cause an error, so that communication cannot be
carried out.

 The allocations shown below are not possible, neither for link relays nor for

link registers.

Send area is split on a single PLC

Send and receive areas are split into multiple segments

6-11

PLC Link

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6.4 PLC Link Response Time

6.4.1 Response Time of 1 Transmission Cycle

The maximum value for the transmission time (T) of one cycle can be calculated using the
following formula.

 Calculation formula

(1) Ts (transmission time per station)

Calculation
formula

Ts = Scan time + Tpc (PLC link sending time)

Tpc = Ttx (sending time per byte) x Pcm (PLC link sending byte size)
Ttx = 1 / (transmission speed kbps × 1000) × 11ms … Approx. 0.096 ms at 115.2 kbps
Pcm = 23 + (number of relay words + number of register words) x 4 (4 times based on ASCII

code)

(2) Tlt (link table sending time)

Calculation
formula

Tlt = Ttx (sending time per byte) x Ltm (link table sending size)

Ttx = 1 / (transmission speed kbps × 1000) × 11 ms … Approx. 0.096 ms at 115.2 kbps
Ltm = 13 + 2 × n (n = No. of added stations)

(3) Tso (Master station scan time)

This should be confirmed using the programming tool.

(4) Tlk (link addition processing time)

Calculation
formula

When there is no station that is yet to be added to the link, Tlk = 0
Tlk = Tlc (link addition command sending time) + Twt (addition waiting time)

+ Tls (sending time for command to stop transmission if link error occurs) + Tso (master station
scan time)

Tlc = 10 x Ttx (sending time per byte)
Ttx = 1 / (transmission speed kbps × 1000) × 11ms … Approx. 0.096 ms at 115.2 kbps
Twt = Default value: 400 ms
Tls = 7 x Ttx (sending time per byte)
Ttx = 1 / (transmission speed kbps × 1000) × 11ms … Approx. 0.096 ms at 115.2 kbps
Tso = Master station scan time

6-12

 Example of calculation

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Condition Calculation process

16 units connected to the link; no
station yet to be added

Where Max. station no. = 16,

1

Relays/registers are equally
allocated, and

Scan time for each PLC is set at 1
ms:

16 units connected to the link; no
station yet to be added

Where Max. station no. = 16,

2

Relays/registers are equally
allocated, and

Scan time for each PLC is set at 5
ms:

16 units connected to the link; 1
station yet to be added

Where Max. station no. = 16,

3

Relays/registers are equally
allocated, and

Scan time for each PLC is set at 5
ms:

8 units connected to the link; no
station yet to be added

Where Max. station no. = 8,

4

Relays/registers are equally
allocated, and

Scan time for each PLC is set at 5
ms:

2 units connected to the link; no
station yet to be added

Where Max. station no. = 2,

5

Relays/registers are equally
allocated, and

Scan time for each PLC is set at 5
ms:

2 units connected to the link; no
station yet to be added

Where Max. station no. = 2,

6

Where 32 relay points and 2W
registers are equally allocated,
and scan time for each PLC is set
at 1 ms:

Ttx = 0.096
Each Pcm = 23 + (4 + 8) × 4 = 71 bytes
Tpc = Ttx × Pcm = 0.096 × 71 ≈ 6.82 ms
Each Ts = 1 + 6.82 = 7.82 ms
Tlt = 0.096 × (13 + 2 × 16) = 4.32 ms

Ttx = 0.096
Each Pcm = 23 + (4 + 8) × 4 = 71 bytes
Tpc = Ttx × Pcm = 0.096 × 71 ≈ 6.82 ms
Each Ts = 5 + 6.82 = 11.82 ms
Tlt = 0.096 × (13 + 2 × 16) = 4.32 ms

Ttx = 0.096
Each Ts = 5 + 6.82 = 11.82 ms
Tlt = 0.096 × (13 + 2 × 15) ≈ 4.13 ms
Tlk = 0.96 + 400 + 0.67 + 5 ≈ 407 ms
Note: Default value for the addition

waiting time: 400 ms

Ttx = 0.096
Each Pcm = 23 + (8 + +16) × 4 = 119

bytes
Tpc = Ttx × Pcm = 0.096 × 119 ≈ 11.43

ms
Each Ts = 5 +11.43 = 16.43 ms
Tlt = 0.096 × (13 + 2 × 8) ≈ 2.79 ms

Ttx = 0.096
Each Pcm = 23 + (32 + +64) × 4 = 407

bytes
Tpc = Ttx × Pcm = 0.096 × 407 ≈ 39.072

ms
Each Ts = 5 + +39.072 = 44.072 ms
Tlt = 0.096 × (13 + 2 × 2) ≈ 1.632 ms

Ttx = 0.096
Each Pcm = 23 + (1 + +1) × 4 = 31 bytes
Tpc = Ttx × Pcm = 0.096 × 31 ≈ 2.976 ms
Each Ts = 1 + +2.976 = 3.976 ms
Tlt = 0.096 × (13 + 2 × 2) ≈ 1.632 ms

6.4 PLC Link Response Time

Response time of 1
transmission cycle
(T)

T Max. = Ts + Tlt + Tso

7.82 × 16 + 4.32 + 1
= 130.44 ms

T Max. =Ts+Tlt+Tso

11.82×16+4.32+5
=198.44ms

T Max. = Ts + Tlt + Tso
+ Tlk

11.82 × 15 + 4.13 + 5 +
407
= 593.43 ms

T Max. = Ts + Tlt + Tso

16.438 + 2.79 + 5
= 139.23 ms

T Max. = Ts + Tlt + Tso

44.072 × 2 + 1.632 + 5
= 94.776 ms

T Max. = Ts + Tlt + Tso

3.976 × 2 + 1.632 + 1
= 10.584 ms

6-13

PLC Link

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6.4.2 Response Time When There is a Station Ye t to be Added

 If there are stations that have not been added to the link, the Tlk time (link addition

processing time) increases, and with this the transmission cy cle time will be longer.

NOTE

 “Stations that have not been added (stations yet to be added)” refers to

stations between No.1 and the Max. station no. that are not connected, or
those that are connected but whose power supply has yet to be turned on.

6-14

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MEWTOCOL

Master/Slave Communication

7

MEWTOCOL

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Master/Slave Communication

7.1 Configuration

7.1.1 Setting Communication Conditions

 Configuration

Setting items Default Specification range Remark

Communication
mode

Station no. 1

Baud rate 9600 bps

Data length 8 bits 8 bits
Parity Odd Odd
Stop bit 1 bit 1 bit
RS/CS Invalid Invalid / Valid
Send waiting time

(set value × 0.01
ms)

Start code STX Invalid ­Terminator setting CR ­Terminator

judgment time
(set value × 0.01
ms)

Modem initialization

(Note 1) In MEWTOCOL communication, the following setting items need not to be specified.

Start code, terminator setting, terminator judgment time, PLC link setting

MEWTOCOL­COM

0

0 -

Do not
initialize

MEWTOCOL-COM
MEWTOCOL7-COM

MEWTOCOL-COM: 0 - 99
MEWTOCOL7-COM: 0 - 999

300 / 600 / 1200 / 2400 / 4800 /
9600 / 19200 / 38400 / 57600 /
115200 / 230400

0 - 10000
(0 - 100 ms)

Do not initialize / Initialize while
performing settings / Re­initialize while performing
settings

Master communication is not
possible using MEWTOCOL7.

Set a specific station no. for PLC to
be connected to the PLC link. Set a
value that does not overlap with
other devices.

Set the baud rate to match that of
devices to be connected.

The setting must be done according
to the devices connected.
In general, the default values (8-bit
length, odd parity, and 1-stop bit)
should be used.

Set this when it is necessary to
delay response to the partner
device in slave communication.

No need to specify.

Perform settings only when a
modem is to be connected. Perform
settings for start-up modem
initialization.

7-2

7.2 List of MEWTOCOL / MEWTOCOL7 Supporting Commands

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7.2 List of MEWTOCOL / MEWTOCOL7 Supporting Commands

7.2.1 List of MEWTOCOL C ommands

 Commands to be used

Type of instruction Code Description

RC Reads ON/OFF status of contact.

Read contact area

Write contact area

Read data area RD Reads the contents of a data area.
Write data area WD Writes data to a data area.
Register or Reset

contacts monitored
Register or Reset

data monitored
Monitoring start MG Monitors a registered contact or data using MC and MD.
Preset contact area

(fill command)
Preset data area

(fill command)
Read the status of PLC RT
Abort AB Aborts reception of multiple frame responses before completion.

(Note) Some devices are not accessible due to format restrictions of MEWTOCOL-COM communication commands.

(RCS) - Specifies only one point.
(RCP) - Specifies multiple contacts.
(RCC) - Specifies a range in word units.
WC Turns ON or OFF the contact.
(WCS) - Specifies only one point.
(WCP) - Specifies multiple contacts.
(WCC) - Specifies a range in word units.

MC Registers the contact to be monitored.

MD Registers the data to be monitored.

SC Embeds the area of a specified range in a 16-point on/off pattern.

SD Writes the same contents to the data area of a specified range.

Reads the specifications of the programmable controller and error
codes if an error occurs.

7.2.2 List of MEWTOCOL7 Commands

 Commands to be used

Type of instruction Code Description

Read data area MMRD Reads the contents of a data area.
Write data area MMWT Writes data to a data area.

REFERENCE

 For details of MEWTOCOL commands, please see 11.2 MEWTOCOL-COM

Format and 11.3 MEWTOCOL7-COM Format.

7-3

MEWTOCOL

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Master/Slave Communication

7.3 MEWTOCOL-COM Master Communication (RECV)

7.3.1 Read Data from an External Device

 Instructions

In master communication, PLC has the sending right, and executes communication by
sending commands to devices that support MEWTOCOL, and receiving responses.
Messages in accordance with the protocol are automatically generated by PLC. In the user
program, reading and writing can be done simply by specifying the station no. and memory
address and executing SEND/RECV instructions.

PLC

DT100 100
DT101 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Command message

%01#RD0040000401 (BCC) C

%01$RD64000000 (BCC) C

R

R

External device sup por ting

MEWTOCOL-COM

DT00400 100
DT00401 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Response message

Specify and read station no. and address based on RECV instruction

 Sample program

 Send commands from the COM1 port of the CPU unit, read data from the data area of an

external device (station no. 1) DT400 - DT401, and write the content into PLC's data register
DT100 - DT101.

 Confirm that the unit is in the master mode (XC), and that the sending process is not in

progress for the same port (YC), and start up the SEND instruction.

 In the UNITSEL instruction, specify the slot No. (U0) and the COM. port No. (U1).
 In the RECV instruction, specify and execute the partner station no. (U1), initial address

(DT400), No. of data (U2), and initial address on the PLC side to save data (DT100).

R0

R100

DF

（）

XC YC

Master
communication
Clear to send flag

Master
communication
Sending active flag

R100

Execute

RECV

UNITSEL U0 U1

S1 S2

RECV.US DT0U2 DT100U1 DT400

S1 S2 n D1 D2

(Note) The unit number and COM port number in the above program is applied when the COM.1 port of the CPU unit

is used.

Starting conditions for RECV
execution
Clear to send flag: ON
Sending active flag: OFF

Settings for communication port
S1: Slot 0
S2: COM1

RECV processing
S1: Partner station no. (U1)
S2: Data address (DT400)
n: No. of data (U2)
D1: Data saving area (DT100)
D2: Execution result code (DT 0)

7-4

 Timing chart

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7.3 MEWTOCOL-COM Master Communication (RECV)

Master communication

Clear to send flag

(XC, XD, XE, XF )

Master communication

Sending active flag

(YC, YD, YE, YF)

Execute RECV

Master communication

Sending done result flag

(Y0, Y1, Y2, Y3)

Sending data

Response reception

processing

Confirm ON

Confirm OFF

 I/O allocation (For CPU Unit)

COM port no.

1 2 0

XC XD XE

YC YD YE

Y0 Y1 Y2

Name Explanation

Master
communication Clear
to send flag

Master
communication
Sending active flag

Sending done result
flag

Conditions to enable execution of RECV
instruction
Clear to send flag (XC, XD, XE, XF): ON
Sending active flag (YC, YD, YE, YF): OFF

Sending active flag (YC, YD, YE, YF):
Sending data: ON, Sending done: OFF

Sending done result flag (Y0, Y1, Y2, Y3):
Normal completion: OFF
Abnormal com p le ti on: ON

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the unit
is in the RUN mode.

Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in general-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)

 I/O allocation (For Serial Communication Unit)

COM port no.

1 2 3 4

XC XD XE XF

YC YD YE YF

Y0 Y1 Y2 Y3

(Note 1) Each contact is used for reading the operation status. Do not write over it with a user program.

Name Explanation

Master
communication
Clear to send flag

Master
communication
Sending active flag

Sending done result
flag

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the
unit is in the RUN mode.

Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in genera-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)

7-5

MEWTOCOL

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Master/Slave Communication

KEY POINTS

 Specify the port targeted for communication, using UNITSEL instruction

immediately before SEND/RECV instruction.

 Master communication is only valid when MEWTOCOL or MODBUS is

selected. Confirm that the "Master communication Clear to send flag" (XC ­XF) for the targeted channel is ON, and execute SEND/RECV instruction.

 You cannot execute other SEND/RECV instruction for a communication port

in master communication. Confirm that the "Master communication Sending
active flag" (YC - YF) is OFF, and execute instruction.

 You cannot execute SEND/RECV instruction for a port in slave

communication.

 If no response is received, the "Master communication Sending active flag"

(YC - YF) remains ON throughout the timeout setting time specified in CPU
configuration.

 Up to 16 SEND/RECV instructions can be executed simultaneously for

different COM. ports.

7-6

7.3 MEWTOCOL-COM Master Communication (RECV)

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7.3.2 RECV Instruction (When MEWTOCOL-COM is Used )

 Instruction format

Items Settings Setting range

i Specify the operation unit. US / SS
S1 Specify the partner station no. 1 - 99

S2

n Specify the No. of sent data. (Note 3)

D1

D2

(Note 1) Transmission methods vary by the type of device to be specified for the operands [S2] and [D1].

(Note 2) Bit device DT, n and LD, n cannot be specified for the header of the sender data in the partner node.
(Note 3) The No. of sent data is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 4): Device that can be specified for [D2] are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified area.

0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication instructions that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error

Specify the device initial address of the source node data area in the partner
node. (Note 1)( Note 2)

Specify the device initial address of the receiver node data area in the source
node. (Note1)

Specify the device area in the source node to save the execution result code
(one word). (Note 4)

Device to be specified for [S2] and [D1]

0 - 99999
1 - 509 words

or 1 bit
(Note1)

-

Transmission

method

16 bit device: WX, WY, WR, WL, DT, LD

1 bit device: X; Y; R; L; DT,n; LD, Bit transmission

Register
transmission

7-7

MEWTOCOL

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Master/Slave Communication

7.4 MEWTOCOL-COM Master Communication (SEND)

7.4.1 Write Data into an Externa l Device

 Instructions

In master communication, PLC has the sending right, and executes communication by
sending commands to devices that support MEWTOCOL, and receiving responses.
Messages in accordance with the protocol are automatically generated by PLC. In the user
program, reading and writing can be done simply by specifying the station no. and memory
address and executing SEND/RECV instructions.

PLC

DT100 100
DT101 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Command message

%01#WDD004000040164000000 (BCC) C

%01$WD (BCC) C

R

External device sup por ting

MEWTOCOL-COM

R

DT00400 100
DT00401 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Response message

Specify and write station no. and address based on SEND instruction

 Sample program

 Send commands from the COM1 port of the CPU unit, and write the content of PLC's data

register DT100 - DT101 into the data area of an external device (station no. 1) DT400 ­DT401.

 Confirm that the unit is in the master mode (XC), and that the sending process is not in

progress for the same port (YC), and start up the SEND instruction.

 In the UNITSEL instruction, specify the slot No. (U0) and the COM. port No. (U1).
 In the SEND instruction, specify and execute the sender initial address (DT100), No. of data

(U2), "Transmit to" station no. (U1), and initial address (DT400).

R0

DF

（）

R100

(Note) The unit number and COM port number in the above program is applied when the COM.1 port of the CPU unit

is used.

XC YC

Master
communication
Clear to send flag

Master
communication
Sending active flag

UNITSEL U0 U1

SEND.US DT0U1 DT400DT100 U2

S1 n D1 D2 D3

R100

Execute

SEND

S1 S2

SEND execution condition
Clear to send flag: ON
Sending active flag: OFF

Settings for communication port
S1: Slot 0 (U0)
S2: COM1 (U1)

SEND process
S: Data saving area (DT100)
n: No. of sent data (U2)
D1: Area code of the receiver (U1)
D2: "Forward to" address (DT400)
D3: Execution result code (DT0)

7-8

 Timing chart

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7.4 MEWTOCOL-COM Master Communication (SEND)

Master communication

Clear to send flag

(XC, XD, XE, XF )

Master communication

Sending active flag

(YC, YD, YE, YF)

Execute SEND

Master communication

Sending done result flag

(Y0, Y1, Y2, Y3)

Sending data

Response reception

processing

Confirm ON

Confirm OFF

 I/O allocation (For CPU Unit)

COM port no.

1 2 0

XC XD XE

YC YD YE

Y0 Y1 Y2

Name Explanation

Master
communication
Clear to send flag

Master
communication
Sending active flag

Sending done
result flag

Conditions to enable execution of SEND
instruction
Clear to send flag (XC, XD, XE, XF): ON
Sending active flag (YC, YD, YE, YF): OFF

Sending active flag (YC, YD, YE, YF):
Sending data: ON, Sending done: OFF

Sending done result flag (Y0, Y1, Y2, Y3):
Normal completion: OFF
Abnormal completion: ON

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the unit is
in the RUN mode.

Turns ON during sending data based on SEND/RECV instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in general-purpose
communication or master communication. (Normal completion: 0,
Abnormal completion: 1)

 I/O allocation (For Serial Communication Unit)

COM port no.

1 2 3 4

XC XD XE XF

YC YD YE YF

Y0 Y1 Y2 Y3

(Note 1) Each contact is used for reading the operation status. Do not write over it with a user program.

Name Explanation

Master
communication
Clear to send flag

Master
communication
Sending active flag

Sending done result
flag

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the
unit is in the RUN mode.

Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in genera-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)

7-9

MEWTOCOL

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Master/Slave Communication

KEY POINTS

 Specify the port targeted for communication, using UNITSEL instruction

immediately before SEND/RECV instruction.

 Master communication is only valid when MEWTOCOL or MODBUS is

selected. Confirm that the "Master communication Clear to send flag" (XC ­XF) for the targeted channel is ON, and execute SEND/RECV instruction.

 You cannot execute other SEND/RECV instruction for a communication port

in master communication. Confirm that the "Master communication Sending
active flag" (YC - YF) is OFF, and execute instruction.

 You cannot execute SEND/RECV instruction for a port in slave

communication.

 If no response is received, the "Master communication Sending active flag"

(YC - YF) remains ON throughout the timeout setting time specified in CPU
configuration.

 Up to 16 SEND/RECV instructions can be executed simultaneously for

different COM. ports.

7-10

7.4 MEWTOCOL-COM Master Communication (SEND)

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7.4.2 SEND Instruction (When MEWTOCOL-COM is Used)

 Instruction format

Setting
items

i Specify the operation unit. US / SS
S Specify the header of the source node data area. (Note 1) -

n Specify the No. of sent data.
D1 Specify the partner station no. (Note 2) (Note 3) 0 - 99
D2

D3

(Note 1) Transmission methods vary by the type of device to be specified for the operands [S] and [D2].

(Note 2) The No. of sent data is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 3) When "0" is specified for partner station no., global transmission is applied. In this case, no response

message is received from the partner side.
(Note 4) Bit device DT, n and LD, n cannot be specified for the header of the receiver data in the partner node.
(Note 5): Device that can be specified for [D3] are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified area.

0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication instructions that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error

Settings Setting range

1 - 507 words
or 1 bit

Specify the initial address of the receiver node data area in the partner
node. (Note 4)

Specify the device area in the source node to save the execution result
code (one word).

Device to be specified for [S2] and [D1]

0 - 99999

(Note 5)

Transmission

method

16 bit device: WX, WY, WR, WL, DT, LD

1 bit device: X, Y, R, L, DT, n, LD, n Bit transmission

Register
transmission

7-11

MEWTOCOL

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Master/Slave Communication

7-12

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MODBUS RTU

Master/Slave Communication

8

MODBUS RTU

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Master/Slave Communication

8.1 Configuration

8.1.1 Setting Communication Conditions

 Configuration

Setting items Default Specification range Remark

Communication mode

Station no. 1 0 - 247

Baud rate 9600

Data length 8 bits 8 bits
Parity Odd Even
Stop bit 1 bit 1 bit
RS/CS Invalid Invalid / Valid

Send waiting time
(set value × 0.01 ms)

Start code STX Invalid ­Terminator setting CR ­Terminator judgment

time
(set value × 0.01 ms)

Modem initialization Do not initialize -

(Note 1) In MODBUS communication, the following setting items need not to be specified.

Start code, terminator setting, terminator judgment time, modem initialization, PLC link setting

MEWTOCOL­COM

0 0 - 10000

0 -

MODBUS-RTU Specify "MODBUS-RTU".

300 / 600 / 1200 / 2400 /
4800 / 9600 / 19200 /
38400 / 57600 / 115200

Set a specific station no. for PLC to
be connected to the PLC link. Set a
value that does not overlap with
other devices.

The setting must be done
according to the devices
connected.

The setting must be done
according to the devices
connected. In general, 8-bit length,
even parity, and 1-stop bit is used.

Set this when it is necessary to
delay response to the partner
device in slave communication.

Use the unit in the default setting
as indicated on the left.

8-2

8.2 List of MODBUS RTU Supported Commands

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8.2 List of MODBUS RTU Supported Commands

8.2.1 List of MODBUS Function Codes

 Table of supported commands

Code Name (MODBUS) Name

01 Read Coil Status Read Y and R Coils 0X
02 Read Input Status Read X Contact 1X
03 Read Holding Registers Read DT 4X
04 Read Input Registers Read WL and LD 3X
05 Force Single Coil Write Single Y and R 0X
06 Preset Single Register Write DT 1 Word 4X
08 Diagnostics Loopback Test ­15 Force Multiple Coils Write Multiple Y's and R's 0X
16 Preset Multiple Registers Write DT Multiple Words 4X
22 Mask Write 4X Register Write DT Mask 4X
23 Read/Write 4X Registers Read/Write DT 4X

(Note 1) Types of MODBUS function codes vary by instructions to be used.

Remarks

(Reference No.)

FP7 supported

functions

●

●

●

●

●

●

-

●

●

-

-

 Correspondence table for MODBUS reference No. and device No.

MODBUS reference No.

000001-002048 0000-07FF Y0-Y127F Coil

002049-034816 0800-87FF R0-R2047F
Input 100001-108192 0000-1FFF X0-X511F
Holding register 400001-465536 0000-FFFF DT0- DT65535

300001-301024 0000-03FF WL0-WL1023 Input register

302001-318384 07D0-47CF LD0-LD16383

(Note 1) The table above indicates correspondence between the MODBUS reference numbers for accessing from a

higher device to FP7 using the MODBUS protocol, and the operation device numbers of FP7.

Data on BUS

(hexadecimal)

PLC device number

8-3

MODBUS RTU

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Master/Slave Communication

8.3 MODBUS RTU Master Communication (RECV)

8.3.1 Read Data from an External Device

 Instructions

In master communication, PLC has the sending right, and executes communication by
sending commands to devices that support MODBUS-RTU, and receiving responses.
Messages in accordance with the protocol are automatically generated by PLC. In the user
program, reading and writing can be done simply by specifying the station no. and memory
address and executing SEND/RECV instructions.

PLC

DT100 100
DT101 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Command message

(Hex) 01 03 00 00 00 02 (CRC)

(Hex) 01 03 04 00 64 00 00 (CRC)

External device

supporting Modbus-RTU

40001 100
40002 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Response message

Specify and read station no. and address based on RECV instruction

 Sample program

 Send co mmands from the COM1 port of the CPU unit, read data from the data area o f an external

device (station no. 1) 40001 - 40002, and write the content into PLC's data register DT100 - DT101.

 Confirm that the unit is in the master mode (XC), and that the sending process is not in

progress for the same port (YC), and start up the SEND instruction.

 In the UNITSEL instruction, specify the slot No. (U0) and the COM. port No. (U1).
 In the RECV instruction, specify and execute the partner device station no. (U1), MODBUS

command and partner device station no. to be used (H0301), initial address (40001), No. of
data (U2), and initial address on the PLC side to save data (DT100). For the address of the
partner device, please check operating instructions, etc. of the relevant device.

R0

R100

DF

（）

XC YC

Master
communication
Clear to send flag

Master
communication
Sending active flag

R100

Execute

RECV

UNITSEL U0 U1

S1 S2

RECV.US DT0U2 DT100H0301 H0

S1 S2 n D1 D2

(Note 1) Operand [S1] of RECV instruction is specified by combining two hexadecimal digits of MODBUS function

code with two hexadecimal digits of partner device station no.

(Note 2) When the partner device is FP series PLC, Operand [S2] of RECV instruction can be specified using the

Device No.

(Note 3) The unit number and COM port number in the above program is applied when the COM.1 port of the CPU

unit is used.

Starting conditions for REC V
execution
Clear to send flag: ON
Sending active flag: OFF

Settings for com m u ni cat i on port
S1: Slot 0 (U0)
S2: COM1 (U1)

RECV processing
S1: MODBUS code (H03) and
partner device station no. (H01)
S2: Partner device address (H0)
(corresponds to H0: 40001)
n: No. of data (U2)
D1: Data saving area (DT100)
D2: Execution result code (DT0)

8-4

 Timing chart

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8.3 MODBUS RTU Master Communication (RECV)

Master communication

Clear to send flag

(XC, XD, XE, XF )

Master communication

Sending active flag

(YC, YD, YE, YF)

Execute RECV

Master communication

Sending done result flag

(Y0, Y1, Y2, Y3)

Sending data

Response reception

processing

Confirm ON

Confirm OFF

 I/O allocation (For CPU Unit)

COM port no.

1 2 0

XC XD XE

YC YD YE

Y0 Y1 Y2

Name Explanation

Master
communication
Clear to send flag

Master
communication
Sending active flag

Sending done
result flag

Conditions to enable execution of RECV
instruction
Clear to send flag (XC, XD, XE, XF): ON
Sending active flag (YC, YD, YE, YF): OFF

Sending active flag (YC, YD, YE, YF):
Sending data: ON, Sending done: OFF

Sending done result flag (Y0, Y1, Y2, Y3):
Normal completion: OFF
Abnormal com p le ti on: ON

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the unit is
in the RUN mode.

Turns ON during sending data based on SEND/RECV instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in general-purpose
communication or master communication. (Normal completion: 0,
Abnormal completion: 1)

 I/O allocation (For Serial Communication Unit)

COM port no.

1 2 3 4

XC XD XE XF

YC YD YE YF

Y0 Y1 Y2 Y3

(Note 1) Each contact is used for reading the operation status. Do not write over it with a user program.

Name Explanation

Master
communication
Clear to send flag

Master
communication
Sending active flag

Sending done result
flag

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the
unit is in the RUN mode.

Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in genera-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)

8-5

MODBUS RTU

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Master/Slave Communication

KEY POINTS

 Specify the port targeted for communication, using UNITSEL instruction

immediately before SEND/RECV instruction.

 Master communication is only valid when MEWTOCOL or MODBUS is

selected. Confirm that the "Master communication Clear to send flag" (XC ­XF) for the targeted channel is ON, and execute SEND/RECV instruction.

 You cannot execute other SEND/RECV instruction for a communication port

in master communication. Confirm that the "Master communication Sending
active flag" (YC - YF) is OFF, and execute instruction.

 You cannot execute SEND/RECV instruction for a port in slave

communication.

 If no response is received, the "Master communication Sending active flag"

(YC - YF) remains ON throughout the timeout setting time specified in CPU
configuration.

 Up to 16 SEND/RECV instructions can be executed simultaneously for

different COM. ports.

8-6

8.3 MODBUS RTU Master Communication (RECV)

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8.3.2 RECV Instruction (MODBUS Function Code Specified Type)

 Instruction format

 Operand

Items Settings Setting range

i Specify the operation unit. US / SS

Specify the MODBUS function codes and partner station no. to be used. (Note 1) (Note 2)

Higher

S1

S2 Specify the source MODBUS address in the partner node. H0 - HFFFF (0 - 65535)
n Specify the No. of sent data. (Note 3)

D1

D2

(Note 1) Operand [S1] is specified by combining two hexadecimal digits of MODBUS function code with two

(Note 2) Based on the types of device specified in operand [D1], the transmission methods and MODBUS function

byte
Lower

byte

Specify the device initial address of the receiver node data area in the
source node. (Note 2)

Specify the device area in the source node to save the execution result
code (one word).

hexadecimal digits of partner station no.
E.g. Specify "H030F" when MODBUS function code is 03 (Read Holding Registers) and station no. is 15.

codes that can be used vary.

Device to be specified

for [D1]

16 bit device
WX, WY, WR, WL, DT, LD

1 bit device
X, Y, R, L, DT, n, LD, n

(Note 3) The No. of sent data is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 4): Device that can be specified for [D2] are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified

area.
0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication instructions that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error

Two hexadecimal digits that indicate the MODBUS
function code

Two hexadecimal digits that indicate the station no. H1 - HF7 (1 - 247)

Transmission

Values that can be specified in higher

method

H1: Read Coil Status (01)

Register
transmission

Bit transmission

H2: Read Input Status (02)
H3: Read Holding Registers (03)
H4: Read Input Registers (04)

H1: Read Coil Status (01)
H2: Read Input Status (02)

H1 - H4 (1 - 4)

1 - 127 words
1 - 2040 bits

-

(Note 3)

bytes of [S1]

8-7

MODBUS RTU

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Master/Slave Communication

8.3.3 RECV Instruction (MODBUS Function Code Unspecified Type)

 Instruction format

 Operand

Items Settings Setting range

i Specify the operation unit. US / SS
S1 Specify the partner station no. H1 - HF7 (1 - 247)

S2

n Specify the No. of sent data.

D1

D2

(Note 1) Types of devices and transmission methods to be specified for operands [S2] and [D1], and MODBUS

(Note 2) Bit device L; DT, n; and LD, n cannot be specified for the header of the sender data in the partner node.
(Note 3) The No. of sent data is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 4): Device that can be specified for D1 are: WX, WY, WR, WL, DT, LD.
(Note 5): Device that can be specified for D2 are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified area.

Specify the device initial address of the source node data area in the
partner node.

Specify the device initial address of the receiver node data area in the
source node.

Specify the device area in the source node to save the execution result
code (one word).

function codes to be used for instruction execution vary.

Device to be specified

for [S2] and [D1]

16 bit device
WX, WY, WR, WL, DT, LD

1 bit device
X, Y, R, L, DT, n, LD, n

0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication instructions that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error

Transmission

method

Register

transmission

Bit transmission

MODBUS function codes

to be used for instruction execution

Read Coil Status (01)
Read Input Status (02)
Read Holding Registers (03)
Read Input Registers (04)

Read Coil Status (01)
Read Input Status (02)

H0 - HFFFF (0 - 65535)
(Note 1) (Note 2)

1 - 127 words
1 - 2040 bits

(Note 3)
(Note 1) (Note 4)

(Note 5)

8-8

8.4 MODBUS RTU Master Communication (SEND)

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8.4 MODBUS RTU Master Communication (SEND)

8.4.1 Write Data into an Externa l Device

 Instructions

In master communication, PLC has the sending right, and executes communication by
sending commands to devices that support MODBUS-RTU, and receiving responses.
Messages in accordance with the protocol are automatically generated by PLC. In the user
program, reading and writing can be done simply by specifying the station no. and memory
address and executing SEND/RECV instructions.

PLC

DT100 100
DT101 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Command message

(Hex) 01 10 00 00 00 02 04 00 64 00 00 (CRC)

(Hex) 01 10 00 00 00 02 (CRC)

External device

supporting Modbus-RTU

40001 100
40002 0

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Response message

Specify and write station no. and address based on SEND instruction

 Sample program

 Send commands from the COM1 port of the CPU unit, and write the content of PLC's data

register DT100 - DT101 into the data area of an external device (station no. 1) 40001 - 40002.

 Confirm that the unit is in the master mode (XC), and that the sending process is not in

progress for the same port (YC), and start up the SEND instruction.

 In the UNITSEL instruction, specify the slot No. (U0) and the COM. port No. (U1).
 In the SEND instruction, specify and execute the PLC initial address (DT100), No. of data

(U2), MODBUS function code to be used (16: H10), partner device station no. (H01), and
initial address (H0). For the address of the partner device, please check operating
instructions, etc. of the relevant device.

R0

DF

（）

R100

(Note 1) Operand [S1] of SEND instruction is specified by combining two hexadecimal digits of MODBUS function

code with two hexadecimal digits of partner device station no. When the MODBUS function code is 16, specify
H10 for [D1].

(Note 2) When the partner device is FP series PLC, Operand [S2] of SEND instruction can be specified using the

Device No.

(Note 3) The unit number and COM port number in the above program is applied when the COM.1 port of the CPU

unit is used.

XC YC

Master
communication
Clear to send flag

Master
communication
Sending active flag

UNITSEL U0 U1

SEND.US DT0H1001 H0DT100 U2

S n D1 D2 D3

R100

Execute

SEND

S1 S2

SEND execution conditions
Clear to send flag: ON
Sending active flag: OFF

Settings for communication port
S1: Slot 0 (U0)
S2: COM1 (U1)

SEND process
S: Data saving area (DT100)
n: No. of sent da ta ( U2)
D1: MODBUS code (H10) and
partner device station no. (H01)
D2: "Transmit to" address (H0)
D3: Execution result code (DT0)

8-9

MODBUS RTU

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Master/Slave Communication

 Timing chart

Master communication

Clear to send flag

(XC, XD, XE, XF )

Master communication

Sending active flag

(YC, YD, YE, YF)

Execute SEND

Master communication

Sending done result flag

(Y0, Y1, Y2, Y3)

Sending data

Response reception

processing

Confirm ON

Confirm OFF

 I/O allocation (For CPU Unit)

COM port no.

1 2 0

XC XD XE

YC YD YE

Y0 Y1 Y2

Name Explanation

Master
communication Clear
to send flag

Master
communication
Sending active flag

Sending done result
flag

Conditions to enable execution of SEND
instruction
Clear to send flag (XC, XD, XE, XF): ON
Sending active flag (YC, YD, YE, YF): OFF

Sending active flag (YC, YD, YE, YF):
Sending data: ON, Sending done: OFF

Sending done result flag (Y0, Y1, Y2, Y3):
Normal completion: OFF
Abnormal completion: ON

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the unit
is in the RUN mode.

Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in general-purpose
communication or master communication. (Normal completion:
0, Abnormal completion: 1)

 I/O allocation (For Serial Communication Unit)

COM port no.

1 2 3 4

XC XD XE XF

YC YD YE YF

Y0 Y1 Y2 Y3

(Note 1) Each contact is used for reading the operation status. Do not write over it with a user program.

8-10

Name Explanation

Master
communication
Clear to send flag

Master
communication
Sending active
flag

Sending done
result flag

Turns ON when MEWTOCOL-COM, MEWTOCOL7, or
MODBUS-RTU is set for the communication mode, and the unit
is in the RUN mode.

Turns ON during sending data based on SEND/RECV
instruction.
Turns OFF when the sending process is completed.

Reports completion result of sending data in genera-purpose
communication or master communication.
(Normal completion: 0, Abnormal completion: 1)

8.4 MODBUS RTU Master Communication (SEND)

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KEY POINTS

 Specify the port targeted for communication, using UNITSEL instruction

immediately before SEND/RECV instruction.

 Master communication is only valid when MEWTOCOL or MODBUS is

selected. Confirm that the "Master communication Clear to send flag" (XC ­XF) for the targeted channel is ON, and execute SEND/RECV instruction.

 You cannot execute other SEND/RECV instruction for a communication port

in master communication. Confirm that the "Master communication Sending
active flag" (YC - YF) is OFF, and execute instruction.

 If no response is received, the "Master communication Sending active flag"

(YC - YF) remains ON throughout the timeout setting time specified in CPU
configuration.

 You cannot execute SEND/RECV instruction for a port in slave

communication.

 Up to 16 SEND/RECV instructions can be executed simultaneously for

different COM. ports.

8-11

MODBUS RTU

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Master/Slave Communication

8.4.2 SEND Instruction (MODBUS Function Code Specified Type)

 Instruction format

 Operand

Items Settings Setting range

i Specify the operation unit. US / SS
S Specify the header of the source node data area. (Note 1) -

n Specify the No. of sent data. (Note 1) (Note 2)

Specify the MODBUS command and partner station no. to be used. (Note 3) (Note 4)

D1

D2

D3

(Note 1) Based on the types of device specified in operand [S] and the No. of sent data specified in [n], the

Specify the header of the MODBUS address in the receiver data area in
the partner node.

Specify the device area in the source node to save the execution result
code (one word).

transmission methods and MODBUS function codes that can be used vary.

Higher
byte

Lower
byte

Types of device

to be specified in [S]

Two hexadecimal digits that indicate the
MODBUS function code

Two hexadecimal digits that indicate the station
no.

Transmission

method

No. of sent

data

Values that can be specified in

[n]

H6: Preset Single Register (06)

16 bit device
WX, WY, WR, WL, DT,
LD

1 bit device
X, Y, R, L, DT, n, LD,ｎ

(Note 2) The No. of sent data [n] is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 3) Operand [D1] is specified by combining two hexadecimal digits of MODBUS function code with two

hexadecimal digits of partner station no.
E.g. Specify "H100A" when MODBUS function code is 16 (Preset Multiple Registers) and station no. is 10.

(Note 4) When "0" is specified for partner station no., global transmission is applied. In this case, no response

message is received from the partner side.

(Note 5): Device that can be specified for [D3] are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified area.

0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication instructions that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error

Register
transmission

Bit
transmission

1

2 - 127

1

2 - 2040 HF: Force Multiple Coils (15)

HF: Force Multiple Coils (15)
H10: Preset Multiple Registers (16)

HF: Force Multiple Coils (15)
H10: Preset Multiple Registers (16)

H5： Force Single Coil (05)
HF: Force Multiple Coils (15)

1 - 127 words
1 - 2040 bits

H5, H6, HF, H10

H0 - HF7 (0 - 247)

H0~HFFFF (0 - 65535)

(Note 5)

higher bytes of [D1]

8-12

8.4 MODBUS RTU Master Communication (SEND)

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8.4.3 SEND Instruction (MODBUS Function Code Unspecified Type)

 Instruction format

 Operand

Items Settings Setting range

i Specify the operation unit. US / SS
S Specify the header of the source node data area. (Note 1)
n Specify the No. of sent data. 1 - 127 words, 1 - 2040 bits (Note 2)
D1 Specify the partner station no. H0 - HF7 (0 - 247) (Note 3)

D2

D3

(Note 1) Types of devices and transmission methods to be specified for operands [S] and [D2], and MODBUS

Specify the initial address of the receiver node data area
in the partner node.

Specify the device area in the source node to save the
execution result code (one word).

function codes to be used for instruction execution vary.

Types of device

to be specified in [S]

16 bit device
WX, WY, WR, WL, DT, LD

Transmission

method

Register transmission

H0 - HFFFF (0 - 65535) (Note 4)

(Note 5)

MODBUS function codes

to be used for instruction execution

Force Multiple Coils (15)
Preset Multiple Registers (16)

1 bit device
X, Y, R, L, DT, n, LD, n

(Note 2) The No. of sent data [n] is on a word basis for register transmission, and on a bit basis for bit transmission.
(Note 3) When "0" is specified for partner station no., global transmission is applied. In this case, no response

message is received from the partner side.

(Note 4) 16 bit device WX, WL, and LD; and 1 bit device X; L; DT, n; and LD, n cannot be specified for the header of

the receiver data in the partner node.

(Note 5): Device that can be specified for [D3] are: WX, WY, WR, WL, DT, LD. Saved as one word in the specified area.

0: Normal completion
1: Communication port is being used for master communication
2: Communication port is being used for slave communication
3: No. of master communication instructions that can be used simultaneously has been exceeded
4: Sending timeout
5: Response reception timeout
6: Received data error

Bit transmission Force Multiple Coils (15)

8-13

MODBUS RTU

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Master/Slave Communication

8-14

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9

General-Purpose

Communication

General-Purpose Communication

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9.1 Operation of General-Purpose Communication

9.1.1 Read Data from an External Device

 Read data from a partner device

In general-purpose communication, communication is executed by sending commands that
suit the partner device, and receiving responses. Command messages are sent by
formulating a data table for message in accordance with the protocol, on the given data
register, and subsequently executing GPSEND instruction.

PLC

External device

Send command message

DT100 U 4
DT101 H 42 41
DT102 H 44 43

・・・・・・ ・・・・・・・・

ABCD (CR)

1 2 3 4 (CR)

40001 2 1
40002 4 3

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Receive response message

Send command based on GPSEND instruction
Receive response based on GPRECV instruction

9.1.2 Write Data into an Externa l Device

 Write data into a partner device

In general-purpose communication, communication is executed by sending commands that
suit the partner device, and receiving responses. Command messages are sent by
formulating a data table for message in accordance with the protocol, on the given data
register, and subsequently executing GPSEND instruction.

PLC

DT100 U 6
DT101 H 42 41
DT102 H 44 43
DT103 H 32 31

Send command message

ABCD 1 2 (CR)

XYZ (CR)

Receive response message

External device

40001 2 1

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

Send command based on GPSEND instruction
Receive response based on GPRECV instruction

KEY POINTS

 There is no relevance between the operation of transmission by GPSEND

instruction and the operation of reception by GPRECV instruction. The CPU
with built-in SCU unit is always clear to receive data.

9-2

9.2 Configuration

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9.2 Configuration

9.2.1 Setting Communication Conditions

 Configuration

Setting items Default Specification range Remark

Communication
mode

Station no. 1 1 - 999 Settings are not necessary.

Baud rate 9600

Data length 8 bits 7 bit / 8 bits
Parity Odd None / Odd / Even
Stop bit 1 bit 1 bit / 2 bits

RS/CS Invalid Invalid / Valid

Send waiting
time
(unit: 0.01 ms)

Start code STX Invalid Invalid / Valid
Terminator

setting
Terminator

judgment time
(unit: 0.01 ms)

Modem
initialization

(Note 1) In general-purpose communication, the following setting items need not to be specified.

Station no., PLC link

MEWTOCOL-COM

0 0 - 10000

CR

0

Do not initialize

General-purpose
communication

300 / 600 / 1200 / 2400
/ 4800 / 9600 / 19200 /
38400 / 57600 / 115200
/ 230400

CR / CR+LF / Time /
ETX

0 - 10000
(0 - 100 ms)

Do not initialize /
Initialize while
performing settings /
Re-initialize while
performing settings

Specify "general-purpose
communication".

The setting must be done according to
the devices connected.

Set to "Valid" only when Communication
Cassette AFP7CCS2 is used in a 5-wire
mode.

Set this when it is necessary to delay
response to the partner device.

The setting must be done according to
the devices connected.

In cases where "Time" is specified in the
terminator setting, set the time for judging
the terminator.

Perform settings only when a modem is
to be connected. Perform settings for
start-up modem initialization.

9-3

General-Purpose Communication

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9.3 Sending Operation

9.3.1 Overview of Sending Operation

 Instructions

Sending in the general-purpose communication is performed by formulating a data table for
sending on the given operation memory, and subsequently executing GPSEND instruction.

PLC

External device

Send message/data

DT100 U 5
DT101 B A
DT102 D C
DT103 ・・E

ABCDE (CR)

Send data based on GPSEND

instruction

00001 ・・・・・・・・
00002 ・・・・・・・・

・・・・・・ ・・・・・・・・

・・・・・・ ・・・・・・・・

 Sample program

 Confirm that the unit is in the general-purpose communication mode (X8), and that the

general-purpose sending process is not in progress for the same port (Y8), and start up the
sending program.

 In the SSET instruction, convert a given message into an ASCII text string, and specify the

number of strings to be sent in the data register DT100, and the message to be sent from
the data register DT101.

 In the UNITSEL instruction, specify the slot No. (U0) and the COM. port No. (U1).
 In the GPSEND instruction, specify and execute the header of the table where the message

to be sent is saved (DT101) and the No. of characters (DT100).

R0

R100

R100

R100

DF

（）

General purpose
communication
Clear to send flag

DF

（）

X8 Y8

General-purpose
communication
Sending active flag

SSET DT100“ABCDE”

GPSEND ． US

R101

S1 S2

R100

UNITSEL U1U0

S1 S2

DT101 DT0DT100

SnD

GPSEND execution conditions
Clear to send flag: ON
Sending active flag: OF F

Data conversion
S1: Sent Data
S2: Save Sent Data

DT100: No. of Sent Characters
DT101 onward: Sent Data

Settings for communication port
S1: Slot 0 (U0)
S2: COM1 (U1)

SEND processing
S: Header of Sent Data (DT101)
n: No. of Sent Characters (DT100)
D: Execution Result Code (DT0)

Y8 R101

（）

DF /

(Note) The unit number and COM port number in the above program is applied when the COM.1 port of the CPU unit

is used.

9-4

Confirm sending completion
Reset GPSEND execution
conditions