RTS WM300 Specifications

HITACHI PROGRAMMABLE CONTROLLER

APPLICATION MANUAL for NETWORK

NJI-491A(X)

Revision History

No. Description of Revision

1 The first edition

2 - Add explanation for EHV-CPU64 / 32 / 16.

- Add explanation for Communication function.

Revised chapter: Chapter 2

Date of

Revision

Manual number

2006.04

－

2007.02 NJI-491A(X)

Chapter 1 Network Configuration

Table of Contents

1-1 to 1-9

Chapter 2 Specification of Communication port for CPU module 2-1 to 2-52

2.1 Features................................................................................................................................... 2-1

2.2.3 Reset function for Ethernet communication port ........................................................... 2-29

2.3.2 Dedicated port ............................................................................................................... 2-37

2.3.3 General-purpose port .................................................................................................... 2-39

2.3.5 Connection between Serial communication port and Peripheral device....................... 2-50

2.3.6 Connection method for RS-422 / 485 communication .................................................. 2-51

Appendix 1 Cable Connection Diagram A-1

MEMO


EHV-CPU can configure various network systems depending on a combination of the communication port for CPU module and the communication module.

Host

Ethernet IEEE802.3

H series

EH-150

EH-150

EH-150

FL-net

CPU link (Coaxial/Optical fiber)

PLC by other maker

Positioning system

DeviceNet

ProfiBus

Figure 1.1 Network configuration for EHV-CPU

1 – 1


1.1 Communication port for CPU module

EHV-CPU is equipped with USB communication port, Serial communication port, and Ethernet communication port.

The personal computer can be connected to every port, and you can create programs and monitor the system by using

Control Editor which is a programming software.

USB communication port

It is a maintenance port for programming software.

Programming software can be used, connecting a notebook which is not equipped with a RS-232C serial port.

Serial communication port

RS-232C/422/485 can be switched like CPU currently in use.

Supports a dedicated procedure and a general-purpose communication.


Ethernet communication port



It has functions equivalent to the Ethernet communication module (4 dedicated procedure connections and 6 message communications). Support to network can be realized by the CPU module by oneself.

Figure 1.2 Communication ports for EHV-CPU

!

Caution

Please pay attention the following points on the communication port.

(1) If the Ethernet communication cable is connected to the serial communication port, the Ethernet communication port of the CPU module and external equipments connected to the Ethernet communication port may be damaged.

(2) A link with a network HUB etc. may not be established on the high speed communication by 100BASE-TX connection (100Mbps) or the link may be easy to cut because communication error occurs under the influence of installation environment, cable length, and noise. In these cases, please construct the network system with the following solutions.

(a) Increases the number of times to retry if necessary, using the TCP/IP communication for the protocol to communicate to other unit.

(b) Change the Ethernet communication speed to 10Mbps.

(3) If the programming tool and the USB communication port are used for connection, the programming tool may generate communication error under noise environment. If communication error is generated under noise environment, the serial port or the LAN port should be used for connection. And do not bring a communication cable close to other wiring and do not put the communication cable and the wiring into the same duct for the stable communication.

Reference

Since the Ethernet communication speed can be changed in Ver.x107 or newer, 5 types of communication speed

(Auto-negotiation, 100M full-duplex/half-duplex, 10M full/duplex/half-duplex) can be set. The communication speed is set to 10M half-duplex at the shipment. (As for “x” in Ver.x107, it represents EHV-CPU128 when x is 0, it represents EHV-CPU64 when x is 1, it represents EHV-CPU32 when x is 2, and it represents EHV-CPU16 when x is

3. This version information is stored in the special internal output WRF050.)

Control Editor (Ver.2.00 or newer) or IP address setting tool can change the communication speed.

1 – 2


(1) Dedicated procedure communication (Task code communication)

A dedicated procedure communication of Hitachi PLC is called a task code communication. CPU can be controlled from the host and I/O can be read and written. Each sales maker provides a driver for this task code communication such as a touch panel and HMI (Human Machine Interface) software. For compatible Hitachi PLCs, it is unnecessary to create a special program.

Host

Serial task code communication

Ethernet

Touch pannel

Ethernet task code communication

Serial communication

HMI software

Application

Hitachi PLC

Communication driver

Request task code

Response task code

EH-150

Data memory

Task code

Figure 1.3 Task code communication

(2) No procedure communication

Serial communication port General-purpose communication

Serial communication port can be used as a general-purpose port which can be controlled by a user program.

Various setting for communication and processing for transmitting and receiving can be created with the user program, matching to external equipments.

User program

TRNS0

General-purpose communication d

RECV0

Serial port

External equipments

Figure 1.4 General-purpose communication for Serial communication port

1 – 3


Ethernet communication port ASR communication

ASR communication function can be used for the event transmitting function which transmits data from the CPU to the host actively at the event occurrence, the cycle transmission which transmits data to the host at constant interval, and when receiving message data from the host at any timing. There are 6 connections and the communication method can be specified respectively. Communication with the host is possible by only minimum setting.

[Optional procedure communication]

TCP/IP application

Ethernet

[Active Open]

Active Open

Connection establish

Waiting for connection open

Passive Open


[Transmitting Broadcast]

[Passive Open]

Passive Open

Waiting for connection open


[Cycle transmitting]

Active Open


Ethernet Ethernet

Figure 1.5 ASR communication for Ethernet communication port

Serial communication port Modem connection function

Serial communication port supports the modem connection function (only in setting RS-232C). If it is set so that the modem connection function can be used, necessary initial setting is performed to the modem automatically in connecting with the modem. If receiving from the modem is detected as an access from the host via commercial line, it becomes the status waiting for receiving task code.

PC EHV-CPU

Modem Modem

RS-232C

(MAX 57.6 kbps)

Commercial line

Figure 1.6 Modem connection function

1 – 4


1.2 Network configuration for Communication module

An example of a network configuration using the communication module is shown below. Refer to each instruction for detailed specification of each module.

(1) Ethernet module (EH-ETH)

If industrial equipments are connected to the information system network, it is useful for performing production control, system operation monitor, facilities monitor, and maintenance smoothly.

1.EH-ETH is mounted in a basic base of EH-150 system and is a communication interface module to connect the

EH-150 system to Ethernet conformed to IEEE802.3.

2. EH-ETH connected to Ethernet functions as one station in the network.

And data can be exchanged between a personal computer and a server on the network.

PC Server

Ethernet

EHV system

Figure 1.7 Example of Network configuration using Ethernet module

(a) 10 connections for transmitting and receiving of data can be used.

- There are 6 ASR connections for message communication and 4 connections for task code communication.

- Data can be transmitted and received by only one connection.

- One of TCP/IP and UDP/IP is selectable as a communication protocol which is used for each connection.

- Data up to 1454 bytes can be transmitted and received between PLC or the host.

(b) Simplifying a ladder program by

Web server function for communication setting

and

ASR function.

- Various settings for starting communication are performed using a general-purpose Web browser. Setting information is stored on a built-in FLASH memory in EH-ETH as a file named “setup.dat”. This file is a text file format.

- Man-hour to create a ladder program can be reduced drastically by using ASR function.

(c) Programming is possible from Control Editor.

- Programming and I/O monitor via Ethernet of EH-ETH are possible by using the Control Editor. Maintenances of the program and the whole system improve by remote operation and monitor between PLC connected by

Ethernet.

1 – 5


(2) DeviceNet

TM

Mater module (EH-RMD) / Slave controller (EH-IOCD)

Since DeviceNet

TM

master module / Slave controller conform to DeviceNet which is a open filed network, not only our master/slave device but also master/slave device made in other maker can be connected.

EH-150 DeviceNet

Master device

Inverter

L100DN/SJ100DN

AC servo

AD series

NX-SDC (Dispersion controller)

Device made in other maker

EH-150 DeviceNet

Slave controller

Dispersion type

I/O slave unit

Figure 1.8 Example of Network configuration using DeviceNetTM Master module / Slave controller

DeviceNet Features

Device type

Explicit peer-to-peer message

I/O peer-to-peer message

Communication adaptor

Yes

No

Configuration consistency value

Fault node recovery

Communication speed 125/250/500 kbps

Yes

No

Master/Scanner

I/O slave message

Bit strobe

Polling

Cyclic

Change of state (COS)

1. Supports Link mode / Remote mode of EH-RMD.

Yes

Yes

Yes

Yes

Yes

Communication protocol

Support connection

Number of installed units

Input and output point

I/O assignment

Conforms to DeviceNet release 2.0

Polling, Bit Strobe, Cyclic, COS, Explicit Message

2 units/CPU 4 units/CPU

256-word input

256-word output

CPU link

1,024-point input and output

Remote 2

2. Up to 16 modules can be mounted on EH-IOCD.

EH-BS11A is not supported. Please use EH-BS3A/5A/8A.

3. EH-IOCD supports a digital I/O, an analog I/O module and a part of high-functional module.

4. Explicit message can be transmitted and received by a ladder program.

1 – 6


(3) Serial interface module (EH-SIO)

1. Communication with Serial communication equipments (General-purpose communication)

User program performs communication with external equipments. “TRNS 9” which is a command for EH-SIO performs EH-SIO control by EHV-CPU and transmitting and receiving of data.

Host

RS-232C

RS-422

Bar code reader

Figure 1.9 System configuration at general-purpose communication

2. Communication with Modbus protocol support equipments

EH-SIO can communicate by Modbus protocol. Modbus slave equipments can be controlled with communication by setting EH-SIO to a master.

And I/O of EHV-CPU can be accessed from the host by Modbus protocol.

Up to 32 units

AC servo

ADAX

4

-series

Inverter

SJ-200

Inverter

SJ-200

RS-485

Figure 1.10 System configuration in controlling equipments supporting Modbus

1 – 7


3. Communication with Communication protocol (Hi-Protocol) support equipments for Hitachi H/EH series

This can connect with HMI supporting Hi-Protocol.

It can connect equipments supporting Hi-Protocol (HMI etc.), setting EH-SIO to Hi-Protocol mode.

Figure 1.11 System configuration in connecting HMI

4. Simple data link function

Simple data link is a function to exchange I/O information with a slave by communication, setting EH-SIO to a master.

PLC which becomes a slave is EH-150*

1

and MICRO-EH*

1

. If initial setting of EH-SIO which becomes a master is completed, the I/O area is updated by the system automatically.

*1 Models supporting a transmission control procedure 2 (with station No.) are applied.

St.No. 18

St.No. 01 St.No. 02 St.No. 31

RS-485

Up to 31 units

Figure 1.12 System configuration in simple data link

1 – 8


(4) CPU link module (Coaxial: EH-LNK, Optical: EH-OLNK)

CPU link can be formed by using the CPU link module (coaxial and optical).

And the entry into the existing H-series CPU link network is possible.

Fig.1.13 shows an example of a system configuration using the CPU link module (coaxial and optical).

ST0 ST61

EH-150 series

Link system 2

ST1 ST62

ST63 ST : Station No.

ST63

ST62

ST1

Link system 1

ST0 ST3

ST2 ST0

Link system 3

Large H-series

Link system 4

Medium H-series

ST1

Link data area

WL

ST1

Figure 1.13 Example of System configuration for CPU link

Link data area

WL

Own station

Other station

Figure 1.14 Outline of Link data area

1 – 9

MEMO

Chapter 2 Specification of Communication port for CPU module

2.1 Features

EHV-CPU has three communication ports as follows.

(1) Ethernet communication port

(2) Serial communication port

(3) USB communication port




Figure 2.1 Communication port

(1) Ethernet communication port

EHV-CPU has 4 ports as a task code dedicated port for communicating by the dedicated protocol of H series.

Programming and monitoring are possible by connecting the Control Editor. This port can also connect with a monitor available on the market corresponding to the H series dedicated protocol.

And since the ASR communication function is supported, transmitting and receiving message data are possible by the simple setting. Message data are transmitted at the event occurrence or periodically, and received automatically.

Therefore, the network configuration matching to the system can be constructed.

In addition, since the SNTP client function is supported, the time information can be taken from the NTP server and the SNTP server on the network, and the time can be revised automatically. (Refer to NTP client function in this chapter for the SNTP client function.)

(2) Serial communication port

EHV-CPU supports RS-232C, RS-422, and RS-485 as a communication interface of the serial communication port.

And also it supports a dedicated port for communicating by the H series dedicated protocol as the communication port and a general-purpose port which can control communication by a user program.

In the dedicated port, programming and monitoring are possible by connecting the Control Editor. This port can also connect with a monitor available on the market corresponding to the H series dedicated protocol. In addition, since the model connecting function is supported (only RS-232C), communication of the programming software via the model can be realized.

In the general-purpose port, since communication can be controlled by the user program, communication with external devices with the serial communication port is possible.

2 – 1


(3) USB communication port

USB communication port is a dedicated port to connect the Control Editor. Programming and monitoring are possible.

Programming software

”Control Editor”

Creation of program

Monitoring

EHV-CPU

Fig.2.2 Programming software connection diagram

HMI software

Application

EHV-CPU

Touch pannel

Figure 2.3 Example of Network configuration using dedicated protocol

Reference

Since the Ethernet communication speed can be changed in Ver.x107 or newer, 5 types of communication speed

(Auto-negotiation, 100M full-duplex/half-duplex, 10M full-duplex/half-duplex) can be set. The communication speed is set to 10M half-duplex at the shipment. (As for “x” in Ver.x107, it represents EHV-CPU128 when x is 0, it represents EHV-CPU64 when x is 1, it represents EHV-CPU32 when x is 2, and it represents EHV-CPU16 when x is

3. This version information is stored in the special internal output WRF050.)

Control Editor (Ver.2.00 or newer) or IP address setting tool can change the Ethernet communication speed.

And set the Ethernet communication speed according to the following table.

Device to be communicated

10M

Table 2.1 Task code communication specifications

Auto-negotiation

Full-duplex

100M

Half-duplex

Full-duplex

Half-duplex

Auto-negotiation

9

－

9

9

－

EHV-CPU

100M 10M

Full-duplex Half-duplex Full-duplex Half-duplex

－

9

－

9

9

－

－

－

－

9

－

－

－

－

9

－

－

－

－

9

2 – 2


2.2.1 Task code communication port

Task code communication can achieve the following functions by combining individual communication command on a host program.

(1) CPU control (occupy / release, CPU status read, etc.)

(2) I/O control (all kinds of monitors)

(3) Memory write (all clear, batch transfer, etc.)

(4) Memory read (read of program, etc.)

(5) Response (all kinds of response from CPU)

This function can establish a system using the HMI software (SCADA, etc.) supporting HITACH H/EH series PLC

Ethernet communication and a touch panel.

HMI software TCP/IP application

HMI software

EHV-CPU

Data memory

Application

Ethernet

HITACH PLC

Communication driver

Task code processing

Request task code

EHV-CPU

Touch pannel

Response task code

Figure 2.4 Composition of Task code communication equipment

Table 2.1 Specifications for task code communication

Item

1 Command system

2 Communication protocol

3 Logical port

4 Logical port No.

5 Timeout time

Specifications

HITACHI H/EH series PLC Ethernet task code (Server function)

TCP/IP, UDP/IP

Up to 4 (A port not to be used can be set up to the Not-Use.)

Select any from 1,024 to 65,535

Invalid or Valid (Time between 1 to 65,535 sec. can be set up optionally.)

2 – 3


2.2.2 ASR communication port

ASR communication function can be used when message data is transmitted from this unit to the host actively at the event occurrence, and message data is received from the host at any time. And communication procedures can be established according to the system.

[Event transmitting]

[Cyclic transmitting]

TCP/IP application

Ethernet Ethernet

Event occurrence!!

[Receiving]

Application

Ethernet

[Transmitting and receiving]

TCP/IP application

Ethernet

Figure 2.5 ASR communication port

Table 2.2 Communication specifications for ASR communication

Item

1 Communication protocol

2 Logical port

3 Maximum length of message

4 Transmitting area

TCP/IP, UDP/IP

Up to 6 (A port not to be used can be set up to the Invalid.)

UP to 730 words

Specifications

Specifying from WX, WY, and internal output

6 Transmitting system Event transmitting, Cyclic transmitting

2 – 4


Communication type

You can specify the following 4 communication types.

Table 2.3 Communication type for ASR communication

Type Description

1 Not used Not perform the transmitting and receiving receiving and Performs the transmitting and receiving to the other station.

3 Only transmitting Performs the transmitting to the other station only.

Connection type

You can specify the following 5 connection types.

Table 2.4 Connection type for ASR communication

2 TCP/IP-Passive open Specifies for the other station

3 TCP/IP-Passive open Optional for the other station

4 UDP/IP Specified for the other station

5 UDP/IP Optional for the other station

TCP/IP-Active open and TCP/IP-Passive open

When performing the ASR communication using TCP/IP, the logical transmission path for the connection with an open request should be established between EHV-CPU and the other station in advance. There are two methods to establish connection, the active open and the passive open.

Table 2.5 Connection method for ASR communication

1 Active Open

Description

A method to establish connection by transmitting the open request later to the other station waiting for the connection open.

2 Passive Open

Active open

Connection established

Waiting for the connection open

Passive open


A method to establish connection by receiving the open request from the other station, waiting for the connection open earlier.

Passive open

Waiting for the connection open

Active open



2 – 5


“Specified” and “Optional” for the other station

Message communication can be achieved with any station if TCP/IP-Active open is specified or UDP/IP-receiving is specified.

Transmitting Broadcast

When “Transmitting and receiving”, or “Transmitting only” is specified using UDP/IP, message data can be exchanged between the logical ports which satisfy the following requirements.

(1) Nodes with the same network address (Multiple other stations)

(2) Nodes with the same logical port No., which can perform the UDP/IP communication (Multiple other stations)

(3) Nodes in status which can receive message (Multiple other stations)

This is called “Simultaneous transmission” or “Transmitting Broadcast”.

【 Transmitting Broadcast 】

Application

Ethernet

1 Event transmitting

2 Cyclic transmitting

Figure 2.6 Transmitting Broadcast

Transmitting type

There are the following 2 transmitting types.

Table 2.6 Transmitting type for ASR communication

Description

When the transmitting trigger bit specified is turned from OFF to ON, data in I/O memory specified as the transmitting area is transmitted

To transmit data, the event transmission request flag should be ON for 120ms or longer and OFF for 120ms or more.

Event transmitting request flag

ON

T

OFF

T

ON

T

OFF

: Trigger bit OFF time (Min)

T

ON

: Trigger bit ON time (Min)

T

OFF

, T

ON

≥

120ms

OFF

Data in I/O memory specified as the transmitting area is transmitted at the interval (1 –

65,535

×

1sec, 1 – 65,535

×

40 ms) specified with the cyclic transmitting timer in a constant cycle.

2 – 6


Setup item

Items need to be set up depending on the combination of the communication type, the connection type, and the transmitting type. Required items are shown below. ” 3 ” is marked to the item which should be set the parameter specifying in the following table for the communication.

* The Control Editor is used in setting up. When the port supply is turned on at next, the set information becomes effective.

Table 2.7 Setup items for ASR communication

Communicatin type

Connection type Transmitting type

Items which shoeld be setup

A B C D E F K L

1 Transmitting TCP/IP-Active and receiving

Event

Cyclic transmitting

3

3

3

3

3

3 3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

Specified Event 3 3 3 3 3 3 3 3 3

Cyclic

3 3 3 3 3 3 3 3 3 3

3

3

Optional Event

3

UDP/IP Specified

Cyclic 3

Event transmitting

Cyclic

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

UDP/IP Optional

2 Only TCP/IP active open

transmitting

Event transmitting

3 3 3 3 3 3 3 3

Cyclic 3 3 3 3 3 3 3 3 3

Event transmitting 3 3 3 3 3 3

Cyclic

3 3 3 3 3 3 3

Specified Event

Cyclic

3

3

3

3

3

3 3

3

3

3

3

3

3

Optional Event 3

UDP/IP Specified

Cyclic

3

Event transmitting

3 3 3

3

3

3

3

3

3

3

3

3

3

3 3

3 3

UDP/IP Optional

Cyclic 3 3 3 3 3 3 3

Event transmitting 3 3 3 3 3

Cyclic

3 3 3 3 3 3

3 Only

receiving

TCP/IP-Active

TCP/IP-Passice

－

－

TCP/IP-Passice －

－

－

3

3

3

3 3 3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3

3 3 3

3 3 3

3

[A] Master station port No. [B] Other station IP address [C] Other station port No.

[D] Transmitting cycle timer [E] Transmitting area I/O type [F] Head I/O address in transmitting area

[G] Transmitting area size [H] Receiving area I/O type [I] Head I/O address in receiving area

[J] Receiving area size [K] Number of retry times [L] Retry interval

2 – 7


Transmitting area and receiving are information

In ASR communication, areas for the I/O memory which store message data to transmit and which store message data received need to be specifies.

Both the size which can be transmitted and received are 1 to 730 words.

Table 2.8 Transmitting and receiving are information for ASR communication

Type

I/O memory area which can be specified

EHV-CPU128 EHV-CPU64 / 32 / 16

Number of areas which can be specified information

WY (*1)

WEX (*1)

WEY (*1) information

1000 to 13FF

2000 to 23FF

3000 to 33FF

4000 to 43FF

5000 to 53FF

6000 to 63FF

7000 to 73FF

WN 0 to 1FFFF 0 to 7FFF

WEY (*1)

1000 to 13FF

2000 to 23FF

3000 to 33FF

4000 to 43FF

5000 to 53FF

6000 to 63FF

7000 to 73FF

WN 0 to 1FFFF 0 to 7FFF

*1: Depends on the I/O assignment.

*2: The size which can be transmitted is up to 730 words totally regardless the number of setting areas

2 – 8


Number of retry times and Retry interval for Connection open

When TCP/IP-active is specified, the number of retry times and the retry interval for the connection open when failing can be specified.

When there is no response to the packet including the SYN flag*

1

transmitted from the EHV-CPU, the retry is performed three times. And this process is repeated for the number of retry times. The internal between cycles which consist of three retries is specified as the retry interval.

The following is an example in case where the number of retry times is set to 3 and the retry interval is set to 10 seconds.

*1: SYN flag is a connection open request flag.

EHV-CPU

SYN

SYN

1.5s

SYN

3s

Fixed by the system

(Unchangeable by user)

6s

SYN

10s

Retry interval

SYN

SYN

1.5s

First retry cycle

SYN

3s

6s

SYN

10s

SYN

SYN

1.5s

Second retry cycle

SYN

3s

6s

SYN

10s

SYN

SYN

1.5s

Third retry cycle

SYN

3s

6s

SYN

Figure 2.7 Connection open retry sequence

2 – 9

WRF600 ASR port 1

WRF601

WRF602

WRF603

WRF604 ASR port 2

WRF605

WRF606

WRF607

WRF608 ASR port 3

WRF609

WRF60A

WRF60B

WRF60C ASR port 4

WRF60D

WRF60E

WRF60F

WRF610 ASR port 5

WRF611

WRF612

WRF613

WRF614 ASR port 6

WRF615

WRF616

WRF617


Status Register, Control register, Transmitting counter, Receiving counter

The status register, the control register, the transmitting counter, and the receiving counter for ASR communication are assigned to the special internal output WRF600 or later.

Table 2.9 Special internal output for ASR function

Status register

Control

Transmitting

Receiving

Status register

Control

Transmitting

Receiving

Status register

Control

Transmitting

Receiving

Status register

Control

Transmitting

Receiving

Status register

Control

Transmitting

Receiving

Status register

Control

Transmitting

Receiving

Set by system

Set by user

Set by system

Set by system

Set by system

Set by user

Set by system

Set by system

Set by system

Set by user

Set by system

Set by system

Set by system

Set by user

Set by system

Set by system

Set by system

Set by user

Set by system

Set by system

Set by system

Set by user

Set by system

Set by system

Clear system or user

Clear by user

Clear by user

Clear by user

Clear by system or user

Clear by user

Clear by user

Clear by user


Clear by user

Clear by user

Clear by user


Clear by user

Clear by user

Clear by user


Clear by user

Clear by user

Clear by user


Clear by user

Clear by user

Clear by user

2 – 10


Details of the status register, the control register, the transmitting counter, and the receiving counter are described below.

Status register

Control register

Transmitting counter b15

[5] b8 b7

[4] b0

[3] [2] [1]

+00

[B] [A]

+01

+02

Receiving counter +03

Figure 2.8 Status register, Control register, Transmitting counter, and Receiving counter

[ Status register ]

[1] ASR port status flag

[2] Event transmitting completion flag

[3] Receiving completion flag

[4] Error flag

[5] Error code

1: Under open, 0: Under close

1: Transmitting completion

1: Receiving completion

1: Error occurrence

0x01: Event transmitting request flag [B] is turned ON while ASR

port status flag [A] is closed.

0x02: Event transmitting request flag is turned ON again in status which the transmitting of message is not completed.

[ Control register ]

[A] ASR port open request flag

[B] Event transmitting request flag

[ Transmitting counter ]

1: Open request,

1: Transmitting start

Stores the number of transmitting of message data.

[ Receiving counter ]

Stores the number of receiving of message data.

0: Close request

2 – 11


(1) ASR port status flag [1] and ASR port open request flag [A]

[TCP/IP Active]

If user turns on the ASR port open request flag [A], the system will open the connection with the communication other stations. If the other station is waiting for the connection open, the connection will be open normally and the ASR port status flag [1] will turn ON and it will be indicated that the connection is opening. If the other station is not waiting for the connection open and is not found, the connection will not be open normally and the ASR port status flag [1] is still

OFF and it will be indicated that the connection is closing. If user turns off the ASR port open request flag [A] while the connection is opened, the connection will be closed and the connection status request flag [A] will turn OFF.

And if the other station closes the connection, user must turn off the ASR port open request flag [A] because it does not turn OFF.

Opens the connection.

Closes the connection .

Failure of the connection open

[A]

[1]

Connection is opened at the rising of the open request.

The other station closes the connection.

Connection is closed at the falling of the open request.

Continues the closing.

: Operation by user

: Operation by system

Figure 2.9 TCP/IP Active open for ASR port status flag and ASR port open request flag

[TCP/IP Passive]

If user turns on the ASR port open request flag [A], the connection open will become the waiting status. In this case, if the other station transmits the connection open request, the connection with the other station will be opened and the

ASR port status flag [1] will turn ON and it is indicated that the connection is opening. The connection open does not become the waiting status when the ASR port open request flag [A] is OFF. In this case, if the other station transmits the connection open request, the connection with the other station will not be opened.

Makes the connection open the waiting status.

Closes the connection.


[A]

[1]

Connection is open by the open request from the other station.


The other station closes the connection.

: Operation by user


Figure 2.10 TCP/IP Passive open for ASR port status flag and ASR port open request flag

2 – 12


(*) In case where the connection is not closed normally.

When the connection is not closed normally for reasons that the cable came off, etc., the process mentioned above is not performed. When the set of the transmitting and receiving is specified to “Transmitting” or “Transmitting and receiving”, it is detected by the transmitting timeout that the connection is not opened normally and the ASR port status flag [1] is turned ON.

Opens the connection.

[A]

[1]

Connection is opened at the rising of the open request.

Cable came off.

Connection close is detected by the transmitting timeout.

: Operation by user


: Event

Figure 2.11 TCP/IP Transmitting and Transmitting and receiving side

for ASR port status flag and ASR port open request flag

When the set of transmitting and receiving is specified to “Receiving”, it is not detected that the connection is closed because of waiting for message data from the other station. When the connection open request is transmitted from the other station again, it is detected that the connection is closed and the ASR port status flag [1] is turned OFF.


Closes the connection.

[A]

[1]

Cable came off.

Connection is opened by the open request from the other station.

Cable came off.

Connection close is detected by the open request from the other station.


: Operation by user


: Event

Figure 2.12 TCP/IP Receiving side for ASR port status flag and ASR port open request flag

2 – 13


[UDP/IP]

If user turns on the ASR port open request flag [A], the ASR port is opened and it is that the ASR port is opening because the ASR port status flag [1] is turned off. In this status, message data can be transmitted and received.

When UDP/IP other station is fixed, ARP packet is transmitted to communication destination when message data is transmitted for the first time. If there is no response to this ARP packet, ASR port is closed and the ASR port status flag [1] is turned off. In case of only receiving or when message data is transmitted after second time, the system does not close the ASR port because ARP packet is not transmitted to communication destination.

If user turns off the ASR port open request flag [A], the ASR port is closed and it is indicated that the ASR port is closing. In this status, message data cannot be transmitted and received.

Open ASR port

Close ASR port

Open ASR port

[A]

[1]

Open ASR port at the rising of open request

Close ASR port at the falling of open request

Close ASR port when there is no response to ARP in sending message data (*)

: Operation by user


(*) Only when UDP/IP other station is fixed, or receiving

(sending and receiving) is chosen.

Fig. 2.13 UDP/IP for ASR port status flag and ASR port open request flag

2 – 14


(2) Event transmitting completion flag [2] and Event transmitting request flag [B]

If user turns on the event transmitting request flag [B] when message data can be transmitted and received (the connection is established in TCP/IP, and ASR port is opened in UDP/IP), the system will transmit message data. If the transmitting of message data is completed, the system will turn on the event transmitting completion flag [2]. If user performs the event transmitting again, user must turn on the event transmitting request flag [B] after turning OFF. And when monitoring whether the transmitting to the event transmitting request has been completed or not, user needs t turn off the event transmitting completion flag before turning on the event transmitting request flag.

If the event transmitting request flag [B] is turned ON when message data cannot be transmitted and received (the connection is not established in TCP/IP, and ASR port is not opened in UDP/IP), the error flag and the error code are set because of error.

Turn off the flag by user if necessary.

(System does not turn off the flag.)

[B]

[2] Transmitting completion

Transmitting starts if the rising of the event transmitting is detected.

: Operation by user


Figure 2.14 Event transmitting completion flag and Event transmitting request flag

(3) Receiving completion flag [3]

If the receiving of message data is completed, the receiving completion flag [3] will turn ON. Since the system turns on this flag whenever the receiving is completed, user needs to turn off this flag when monitoring the receiving using this flag.

Turn off the flag by user if necessary.

(System does not turn off the flag.)

[3]

Receiving completion

: Operation by user


Figure 2.15 Receiving completion flag

2 – 15


(4) Error flag [4] and Error code [5]

The system will turn on the error flag [4] and store the error code [5] if factors of the error are found in the system.

User must clear this flag and area if necessary because the system does not clear them.

[B]

Turn OFF the flag by user if necessary.

(System does not turn OFF the flag.)

Detection of error

[4]

[5]

Error code set Error code reset

: Operation by user


Clear the code by user if necessary.

(System does not clear the code.)

Figure 2.16 Error flag and Error code

(5) Transmitting counter and Receiving counter

The increment of the transmitting counter is performed when message data is transmitted.

The increment of the receiving counter is performed when message data is received.

User must clear the transmitting counter and the receiving counter if necessary because the system does not clear them.

Transmitting of message data Transmitting of message data

Transmitting counter

Increment Increment

Clear the counter by user if necessary.

(System does not clear the counter.)

Receiving counter

: Event

Receiving of message data Receiving of message data

Increment Increment

Clear the counter by user if necessary.

(System does not clear the counter.)

Figure 2.17 Transmitting counter and Receiving counter

2 – 16


TCP/IP protocols

When using TCP/IP to communicate, it is necessary to establish the connection between communication stations.

Otherwise, message data cannot be sent and received. In order to establish the connection, set one side to the

TCP/IP connection active open

, and set the other side to the

TCP/IP connection passive open

.

Open a port of the TCP/IP connection passive open side, and then open a port of the TCP/IP connection active open after the connection open stood by to open. After the connection established, data can be sent and received.

And in order to close the connection, close the port you want to close first.

Active open side Passive open side

EHV-CPU Server

Active open

Connection open error

(Because the passive open side is opened but it is not the stand by status.)

Passive open

Active open

Connection establishment

Data sending and receiving

Connection close

Figure 2.18 Example of TCP/IP protocols

Reference

In order to open the port on the ASR communication port, turn on the ASR port open request flag of the control register.

Ex.) In case of ASR communication port 1: WRF601 = H0001

In order to close the port on the ASR communication port, turn off the ASR port open request flag of the control register.


2 – 17


UDP/IP protocols

In the ASR communication port, when using UDP/IP to communication, it is necessary to open the ASR port.

Message data can be sent and received after the ASR port is opened. Message data cannot be sent and received if the

ASR port is closed. When receiving messages while the ASR port is closed, the receiving data is cancelled.

In the ASR communication port, close the port to terminal the communication.

Active open side Passive open side

EHV-CPU Server

ASR port open


Port open (*)

(*) The ready to send and receive data is called “Port open” in this manual.

ASR port close Port close (*)

(*) The termination to send and receive is called “Port close” in this manual.

Figure 2.19 Example of UDP/IP protocols

Reference

In order to open the port on the ASR communication port, turn on the ASR port open request flag of the control register.


In order to close the port on the ASR communication port, turn off the ASR port open request flag of the control register.


2 – 18


Sample program

[Sample 1]

Network consists of two EHV-CPUs as follows, and the Control Editor sets the ASR communication. The setting information for two EHV-CPUs is as follows.

EHV-CPU1

(Active, Send)

EHV-CPU2

(Passive, Receive)

Data sending

Figure 2.20 Connection diagram of Sample 1

Table 2.10 Setting information of Sample 1

[Description of Sample program]

The connection is opened and the transmitting starts when R0 of EHV-CPU1 is turned ON.

[Sample program of EHV-CPU1]

Setting EHV-CPU1

192.168.0.1

4000

EHV-CPU2

192.168.0.2

4000

3 Protocol

5

6

7

8

Access Point – IP address

Access Point – Port No.

Send Timing

Transmission area

Send

192.168.0.2

4000

Cyclic sending: 1 second

Receive

192.168.0.1

4000

－

WR0 to WRF －

－

WNF

R0 DIF

WRF601 = H0001

While the connection of ASR port a is not established, ASR port a is opened at the rising edge of user turns on R0. After the connection is established, ASR communication is started according to the setting and data is transmitted at one second interval.

WRF600.0 DFN

WRF601 = H0000

When the connection of ASR port 1 is cut by other station and the cable is cut, the

ASR port open request flag falls when the connection is closed.

2 – 19



R7E3

WRF601 = H0001

WRF601.0 DFN

Opens the connection just after the RUN start, or at the falling of OFF of the ASR open request flag after the connection of

ASR port 1 is closed.

WRF600.0 DFN

WRF601 = H0000

When the connection of ASR port 1 is cut by other station and the cable is cut, the

ASR port open request flag falls when the connection is closed.

[Sample 2]

Network consists of one EHV-CPU and one server as follows, and the Control Editor set the ASR communication of

EHV-CPU. The setting information for EHV-CPU3 and the server is as follows.

When the even occurs, 5-word data from WRF00B to WRF00F of EHV-CPU3 is transmitted from EHV-Cpu3 to the server.

EHV-CPU3

(Active, Send)

Server

(Passive, Receive)

Data sending at event occurrence



Setting EHV-CPU3

192.168.0.10

4001

Server

192.168.0.11

4002

3 Protocol

5

6

8

Access Point – IP address

Access Point – Port No.

Transmission area

Send

192.168.0.11

4002

WRF00B to WRF00F

－

Receive

－

－

－

－

－

[Description of sample program]

The connection is opened when R0 of EHV-CPU3 is turned ON, and the event transmitting is performed by turning

ON R1 at the event occurrence.

2 – 20



R0 DIF

WRF601 = H0001

Opens the ASR port 1 at the rising edge of

R0.

WRF600.0 DFN

WRF601 = H0000

The ASR port open request flag falls when the ASR port 1 is closed.

R1 DIF WRF601.1

S

Performs the event transmitting at the rising edge of R1.

WRF600.1 DIF WRF601.1

R

WRF600.1

R

R1

R

The event transmitting completion flag, the event transmitting request flag, and R1 fall when the event transmitting is completed.

[Sample 3]

Network consists of EHV-CPU and Web controller as follows, and the Control Editor sets the ASR communication of

EHV-CPU. ASR communication of Web controller is set using the Web browser. The setting information of

EHV-CPU4 and Web controller is as follows.

The connection is established between EHV-CPU4 and Web controller in two seconds later after RUN of EHV-CPU4,

16-word data from WR0 to WRF of EHV-CPU4 is transmitted from EHV-CPU to Web controller at one second interval. In Web controller, the received data is stored in WR0 to WRF. And 16-word data from WR10 to WR1F of

Web controller is transmitted from Web controller to EHV-CPU4, and the received data is stored in WR10 to WR1F in EHV-CPU4.

EHV-CPU4

(Active, Send / Receive)

Web controller

(Passive, Send / Receive)



2 – 21


Tale 2.12 Setting information of Sample 3

Setting EHV-CPU4

192.168.0.1

4000

192.168.0.2

4000

3 Protocol

4 Send / Receive

5 Access point – IP address

6 Access point – Port No.

7 Send Timing

8 Transmission area

9 Receiving area

Send / Receive

192.168.0.2

4000


WR0 to WRF

WR10 to WR1F

Send / Receive

192.168.0.1

4000


WR10 to WR1F

WR0 to WRF


The connection is established between EHV-CPU4 and Web controller in two seconds after RUN of EHV-CPU4, and the sending and receiving are started.

(If the connection is established before RUN of EHV-CPU4, the connection is closed immediately after RUN and the connection is established again.)


R7E3

WRF601 = H0000

R0 = 1

ASR port is closed immediately after RUN or in falling which ASR port status flag turned off after ASR port 1 was closed.

WRF600.0 DFN

R0 TD0

TC

1ms

2000

TD0 turns on in 2 seconds later from ASR port close.

TD0

WRF601 = H0000

ASR port open request bit is turned on in 2 seconds from ASR port close, and then ASR port is opened.

[Sample program of Web controller]

When Web controller is set to TCP/IP passive station, the connection stands by to open when the power supply is turned on or immediately after the connection is cut. Therefore a program to control the connection is unnecessary.

2 – 22


[Sample 4]

Network consists of two EHV-CPUs as follows, and the Control Editor sets the ASR communication. The setting information of two EHV-CPUs is as follows.

16-word data from WR0 to WRF of EHV-CPU5 is transmitted from EHV-CPU5 to EHV-CPU6. In EHV-CPU6, the received data is stored in WR0 to WRF.

EHV-CPU5

(Active, Send)

EHV-CPU6

(Passive, Receive)

Data sending



Setting

3

5

6

7

8

Protocol

Access points – IP address

Access points – Port No.

Send Timing

Transmission area

EHV-CPU5 EHV-CPU6

192.168.0.101

4000

UDP/IP, Specified

Send

192.168.0.102

192.168.0.102

4000

UDP/IP, Specified

Receive

192.168.0.101

4000

Cyclic sending: 40ms

4000

－

WR0 to WRF －

－

WRF


ASR port is opened in two seconds later after RUN of EHV-CPU5. If there is a communication target is on the network (there is a response to ARP packet), the transmission is executed automatically. And similarly, EHV-CPU6 executes the receiving if the ASR port is opened in EHV-CPU6 because the ASR port is opened also in two seconds after RUN of EHV-CPU6.

2 – 23


[Sample program of EHV-CPU5 and 6]

R7E3

WRF601 = H0000

R0 = 1

WRF600.0 DFN

R0

TD0

WRF601 = H0000

ASR port is closed immediately after RUN or in falling which ASR port status flag turns off after ASR port 1 is closed.

TD0

TC

1ms

2000

TD0 turns on in two seconds later after ASR port close.

ASR port open request bit is turned on in two seconds later after ASR port close, and ASR port is opened.

In case of UDP/IP, it can be sent and received in this status.

2 – 24


Cautionary note

In communication (Task code processing and ASR communication) of EHV-CPU series, the response may delay if

CPU is loaded. We would explain a load of CPU below. Please utilize this as a standard in considering the responsibility of communications.

[About Communication processing time in CPU module]

CPU module executes processing by two processors, one is an operation processor to execute user programs and the other is a main processor to execute a system program processing, and END processing and a communication processing. While the operation processor executes the user program, the main processor executes the communication processing. Therefore, a total of scan time and system processing time is communication processing time.

Taking 40ms which is a minimum transmission interval of ASR communication for instance, a rate of time for each processing executed by the main processor is shown below. In this case, response delay and transmission delay occur at least unless task code communication and ASR communication are completed within approx. 28ms for communication processing.

System program processing

6.4 [ms]

(Fixed) *1

Processing time 40ms

Communication processing (Task code communication, ASR communication)

Scan time + System processing time

28.7 [ms]

(Fluctuation)

I/O refresh processing 2.2ms (Fluctuation) *3

END processing 2.7ms (Fluctuation) *2

*1. 1ms cyclic processing. In this case, it is executed 40 times.

*2. Processing time when the number of program steps is 0

*3. Processing time when the number of I/O mounted is 66 words (1056 points, that is 66 modules equipped 16-point I/O each are mounted.)

Figure 2.24 An example of ratio of each processing by main processor within 40ms

Communication processing time is not fixed but fluctuates under the influence of the following factors.

(a) Scan time of user program

While the operation processor executes the user program, the main processor can execute the system processing and the communication processing. The longer scan time becomes, the more communication processing time increases. And since the number of times that END processing occurs within a same time also decreases if scan time get longer, END processing decreases and communication processing time increases in above figure.

(b) I/O configuration

I/O refresh processing time increases and communication processing time increases in proportion to the number of modules mounted. It takes 1

µ s per word as processing time depending on the external I/O points and the number of link data.

(c) System processing time (Setting by Control Editor)

This is a setable time, using operation parameter of Control Editor. This “System processing” means the communication time.

2 – 25


[Calculation method of communication processing time]

Communication processing time can calculate using the following methods, and is calculated on the basis of the transmission interval of ASR.

(Example)

- Whole processing time (ASR transmission interval)

- System program processing time (1ms cyclic processing)

- System processing time (Setting by Control Editor)

…

40ms = 40,000

µ s

…

160

µ s

- Scan time (Displayed value of CPU status current value) (*)

- END processing time (Fixed) (*)

…

2ms = 2,000

µ s

…

80

µ s

- I/O refresh processing time (In mounting 66 module with 16-point I/O) (*)

…

66

µ s

…

1ms = 1,000

µ s

(*) Operation time for one scan

(a) System program processing time:

160 [

µ s/time]

×

40 [time] (Execution times in 40ms) = 6,400[

µ s]

(b) Number of scan times of user program:

(Whole processing time - (a)) / (Scan time + END processing time + I/O refresh time + System processing time)

= ( 40,000[

µ s] - 6,400[

µ s] ) / ( 2,000[

µ s] + 80[

µ s] + 66[

µ s] + 1,000[

µ s] )

≅

10.7 [time]

(c) Scan time:

2,000 [

µ s/time]

×

(b) = 2,000 [

µ s/time]

×

10.7 [time] = 21,400 [

µ s]

(d) System processing time:

1,000 [

µ s/time]

×

(b) = 1,000 [

µ s/time]

×

10.7 [time] = 10,700 [

µ s]

Communication processing time = (c) + (d) = 21,400 [

µ s] + 10,700 [

µ s] = 32,100 [

µ s] = 32.1ms

In this example, the communication processing time is 32.1ms. If processing of task code communication and ASR communication is 32.1ms or less, delay of communication response does not occur.

System program processing time

6.4 [ms]

(a)

Whole processing time 40ms

Communication processing (Task code communication and ASR communication)

Scan time + System processing time

32.1 [ms]

(c) + (d)

I/O refresh processing time: 66[

µ s]

×

10.7[time]

≅

0.7[ms]

END processing time: 80[

µ s]

×

10.7[time]

≅

0.9[ms]

Figure 2.25 Calculation of communication processing time

2 – 26


[About Task code processing time]

In EHV-CPU, Task code communication is executed when Control Editor is connected in Online mode and the indicator such as a touch panel is connected. Processing time of task code changes according to I/O points to be monitored. A relation between I/O points to be monitored and task code is shown below. (Task code transmission interval is 110ms according to an original measurement conditions.)

Processing time of task code can be expressed as follows.

[Task code processing time] = 0.1

×

[I/O monitor points] + 5.0 [ms]

But, when task code communication is executed using several ports, it takes processing time for used ports.

35.0

30.0

25.0

20.0

15.0

10.0

5.0

0.0

0 50 100 150 200

Number of Monitor Word I/O points

250

Figure 2.26 Monitor I/O points and Task code processing time

[About ASR communication time]

Processing time of ASR transmission depends on transmitted I/O points. A relation between transmitted I/O points and ASR processing time is shown below.

Processing time of ASR transmission is expressed as follows.

[ASR transmission processing time] = 0.0066

×

[Number of transmitted words] + 3.7 [ms]

But, when ASR transmission is executed using several ports, it takes processing time for used ports.

9.0

8.0

7.0

6.0

5.0

4.0

3.0

0 100 200 300 400 500

Number of ASR transmission words

600 700

Figure 2.27 Monitor I/O points and Task code processing time

2 – 27


[About Transmission interval design of ASR communication]

ASR communication is set to the lower priority than Task code communication in communication processing.

Therefore, the time which subtracts the task code processing time from the communication processing time is a time given to ASR communication. And if the processing of whole ASR communication is completed within this time, the set transmission interval is not kept and transmission delay will occur. Refer to the following examples in designing the transmission interval of ASR communication.

Example 1) ASR communication: Using 4 ports (each 32 words)

Task code port: using 1 port (each 32-word monitor)

[ASR transmission processing time] = (0.0066

×

32 [word] + 3.7)

×

4 [port] = 15.6 [ms]

[Task code processing time] = (0.1

×

32 [word + 5.0)

×

1 [port] = 8.2 [ms]

[Communication processing time] = [ASR transmission processing time] + [Task code processing time]= 15.6 + 8.2 = 23.8 [ms]

In the above case, the delay does not occur on transmission cycle in this condition because the time the main processor can be operated in the communication processing is 32.1ms.

Example 2) ASR communication: Using 1 port (256 words)

Task code port: Using 3 ports (each 32-word monitor)


×

256 [word] + 3.7)

×

1[port] = 5.4[ms]


×

38[word] + 5.0)

×

3[port] = 26.4[ms]

[Communication processing time] = [ASR transmission processing time] + [Task code processing time]= 5.4 + 26.4 = 31.8[ms]

In the above case, the delay may occur on transmission cycle occasionally because the time the main processor can be operated in the communication processing is 32.1ms.

Example 3) ASR communication: Using 4 ports (256 words)

Task code port: Using 2 ports (each 64-word monitor)


×

256[word] + 3.7)

×

4[port] = 21.6[ms]


×

64[word] + 5.0)

×

2[port] = 22.8[ms]

[Communication processing time] = [ASR transmission processing time] + [Task code processing time] = 21.6 + 22.8 = 44.4[ms]

In the above case, the delay occur on transmission cyclic in this condition because the time the main processor can be operated in the communication processing is 32.1ms.

[In order that the delay does not occur on communication processing]

According to the calculation methods in the preceding paragraph, when enough communication processing time cannot be obtained within 40ms cycle or when the expected communication response cannot be got, obtain the communication processing time by adjusting the following three items.

- The number of communication port to be used (ASR communication and Task code communication)

- The number of communication words

- System processing time

2 – 28


2.2.3 Reset function for Ethernet communication port

When communication using the Ethernet communication port cannot be performed by some factors, communication can be performed again by resetting the port. This port reset function can reset four task code ports and 6 ASR ports individually. Therefore, only a port to reset can be reset without stopping the port which is communicating normally.

But, a standard processing time for the port reset is 90ms.

Please turn ON a special internal output corresponding to the port to reset for using this function. The special internal output for this function is as follows.

Table 2.14 Special internal output for Ethernet communication port reset

No. Name Meaning Description communication 1 : Reset request port

Task code port 1

Reset request communication

1 : Reset request port

Task code port 2



Task code port 3



Task code port 4

Reset request communication 1 : Reset request port

ASR port 1

Request reset

Returns the processing of task code port 1 to the initial status.




Returns the processing of ASR port 1 to the initial status. communication

1 : Reset request Returns the processing of ASR port 2 to the port

ASR port 2

Request initial status. communication


ASR port 3

Request reset initial status. port communication

1 : Reset request Returns the processing of ASR port 4 to the initial status.

ASR port 4

Request reset port communication 1 : Reset request Returns the processing of ASR port 5 to the initial status.

ASR port 5

Request reset communication


ASR port 6

Request initial status.

ON by user OFF by system

(If reset is completed, OFF by system.)

2 – 29


Reset request: R91x

ON

OFF

ON by user

OFF by system

Processing inside CPU Reset processing

Figure 2.28 Reset function for Ethernet communication port

■

Cautionary note

The above bit can return the Ethernet communication processing inside EHV-CPU to the initial status but cannot reset the hardware.

And even if the reset request is transmitted by turning on the above bit of the task code port and the ASR port which cannot be used, it cannot be reset. Therefore, the reset request bit turned on by user is turned off by system.

Reference

The operation of reset processing is different between “a case where the connection is established” and “a case where the connection is not established”.

In the case where the connection is established, the connection is closed first (the timeout is performed at 1ms if the processing is not completed properly) and then the communication end inside EHV-CPU is deleted and re-constructed.

In the case where the connection is not established, the communication end inside EHV-CPU is deleted and re-constructed.

2 – 30


2.2.4 NTP client function

EHV-CPU is equipped with the SNTP (Simple Network Time Protocol) client function which retrieves the current time from the NTP (Network Time Protocol) server and the SNTP server on the network.

The interval of retrievals can be set by specifying time and minute. And this function can control when the current time is retrieved from a user program.

SNTP sever

SNTP service including providers

The value of the calendar clock in EHV-CPU can be synchronized by retrieving the current time using the SNTP service on intranet or Internet.

Figure 2.29 SNTP client function

Table 2.15 SNTP client specifications

Item Specifications


Retrieval interval

SNTP

（

Simple Network Time Protocol

）

Specified by user

（

00:01

～

99:59

）

Retrieved time data yyyy/mm/dd/tt/mm/ss

Where the time data is stored Special internal output area （ WRF00B ～ WRF00F ）

Update of clock using Updated by software in EHV-CPU retrieved time

The current time retrieved with this function is stored on the Calendar clock are (WRF00B to WRF00F), and update is performed at the specified interval. And the current time retrieved from the NTP server is stored in the special internal output of EHV-CPU.

Special internal output (Calendar clock data) Special internal output (Time for retrieving the current time from the NTP)

WRF00B: year

WRF00C: month and date

WRF00D: day

WRF00E: time and minute

WRF00F: second

WRF40B: year

WRF40C: month and date

WRF40D: day

WRF40E: time and minute

WRF40F: second

Figure 2.30 Word Special internal output for NTP function

Setup

The setup for the NTP function can be specified using the Control Editor.

Table 2.16 Setup for NTP function

Item Description

1 Valid

2 Server address

Specifies the setup for NTP function to valid or invalid.

Specifies the address of NTP server.

3 Connection interval Specifies the interval for retrieving the current time from NTP server.

4 Time zone Specifies the time zone.

2 – 31


It is controllable using the bit special internal output from the user program when the NTP server is accessed. And the setup of the time zone and the current time retrieved from the NTP server are stored in the word special internal output.

(1) Bit special internal output

Table 2.17 Bit special internal output for NTP function

No. Name Meaning

User program

Control Valid/Invalid request result

0: Invalid

1: Valid

1: Retrieval start

0: Success of retrieving

1: Failure of retrieving

Description

Changes the timing when the current time from the NTP server is retrieved, by a cycle from CE or by a user program (R901).

ON when the current time is retrieved from NTP server.

ON by user

Indicates the failure of retrieving the current time from NTP server. condition condition

ON by user

ON by system

OFF by user

OFF by system

OFF by system

R900

ON

OFF

ON by user OFF by user

ON by user OFF by system ON by user OFF by system

R901

ON

OFF

ON or OFF by system

ON at success

R902

ON

OFF

OFF at failure

RUN start

ON by system

When the retrieving time from NTP server is success, the retrieved data is stored in the word special internal output.

Figure 2.31 Bit special internal output for NTP function (when NTP setup is valid)

R900

ON

OFF



R901

ON

OFF

R902

ON

OFF

RUN start

ON by system

When NTP setup is invalid, it is turned OFF by system even if the control flag is turned

ON by user.

Figure 2.32 Bit special internal output for NTP function (when NTP setup is invalid)

2 – 32


■

Cautionary note

When the NTP time retrieving request (R901) competes with the read (R7F8) and the write (R7F9) of the calendar clock, and the 30s adjust (R7FA), another processing is not performed until the processing to the first detected request is completed because the first request detected by system is processed first.

(2) Word special internal output

Table 2.18 Word special internal output for NTP function

No. Name Storage data Description Set condition

Reset condition

WRF40A Time zone setup

WRF40B Calendar, Clock

WRF40C NTP server retrieving value

WRF40D (BCD 4-digit)

WRF40E

See the following table

Specifies the time zone of the NTP setup of EHV-CPU.

But stores the time zone set value by system when the power is on.

Year Indicates year with 4-digit.

Month and date Indicates month and date.

Day Indicates day.

(Sun.: 0000 – Sat.: 0006)

Time and minute Indicates time and minute.

(24 hours system)

Sets by user.

(Sets by system only when the power is on.)

Sets by system.

(Sets the current time before the time zone revision at success of the time retrieving from the NTP server.)

－

－

WRF40F

(Lower is 2 digits, Upper is 00)

Set value

Time zone

Table 2.19 Time zone setup for NTP function

Set value

Time zone

Set value

Time zone

H001A GMT +8:00

■

Cautionary note

When changing the time zone by the special internal output, the clock data becomes the data after revision after having seta time zone.

(The set value of time zone is stored on the backup memory. Note that the life of the backup memory gets shorter if the time zone setup is changed frequently.)

2 – 33


2.2.5 Factory

The factory setting of the Ethernet communication port is as following.

Table 2.21 Factory setting for Ethernet communication port

Item Setup

IP address

Subnet mask

Default gateway

Ethernet communication speed (*)

NTP setting

Time zone

Task code communication setting

Port 1 Port No.

Port 1 Protocol

192.168.0.1

255.255.255.0

0.0.0.0

10M half-duplex

Invalid

GMT+09:00

Valid

3004

Port 2 Port No.

Port 2 Protocol

Port 3 Port No.

Port 3 Protocol

TCP/IP

Valid

3005

TCP/IP

Valid

3006

TCP/IP

Valid

3007 Port 4 Port No.

Port 4 Protocol

Timeout

ASR setting

ASR port 0

ASR port 1

ASR port 2

ASR port 3

ASR port 4

ASR port 5

TCP/IP

30

Invalid

Invalid

Invalid

Invalid

Invalid

Invalid

(*) Since the Ethernet communication speed can be changed in Ver.x107 or newer, 5 types of communication speed

(Auto-negotiation, 100M full-duplex/half-duplex, 10M full-duplex/half-duplex) can be set. The communication speed is set to 10M half-duplex at the shipment. (As for “x” in Ver.x107, it represents EHV-CPU128 when x is 0, it represents EHV-CPU64 when x is 1, it represents EHV-CPU32 when x is 2, and it represents EHV-CPU16 when x is 3. This version information is stored in the special internal output WRF050.)

Control Editor (Ver.2.00 or newer) or IP address setting tool can change the Ethernet communication speed.

2 – 34


2.3 Serial communication port

(1) RS-232C

CD1

ER1

TX1

RX1

DR1

[1] SG1

[2] CD1

[3]

[4]

[5]

[6]

[7]

ER1

ER2

SD1

RD1

DR1

Port 1 from the front of module (Socket side)

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

RS1

[8] RS1

Figure 2.33 Circuit diagram and pin numbers for Serial communication port RS-232C

Pin No. Signal

Table 2.21 List of signals for Serial communication port RS-232C

Direction Meaning

[2]

[3]

CD1

ER1

Notification signal during carrier received

Communication enabled signal. When this signal is high level, communication is possible.

[5]

[6]

[7]

SD1

RD1

DR1

[8] RS1

(2) RS-422 / 485

Data transmitted by CPU

Data received by CPU

Peripheral units connected signal.

When this signal is high level, indicates that dedicated peripheral are connected.

Transmission request signal. When this signal is high level, indicates that the CPU can receive data.

TX1

RX1

[1]

SG1

[2]

[3]

[4]

[5]

N.C.

N.C.

TX

TXN

[6]

RXN

[7]

[8]

RX

N.C.

Port from the front of module (Socket side)

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

Figure 2.34 Circuit diagram and pin numbers for Serial communication port RS-422 / 485

Table 2.22 List of signals for Serial communication port RS-422 / 485

Pin No. Signal

Abbrevi ation

Direction

CPU Host

[1] SG Grand

[2] N.C. Un

[3] N.C. Un

[4]

[5]

[6]

TX

TXN

RXN

CPU transmission data +

CPU transmission data -

CPU receiving data -

[7] RX CPU receiving data +

[8] N.C. Un

Meaning

2 – 35


(3) Pin arrangement for RS-422 / 485

EHV-CPU

Serial port

SG1

N.C.

[1]

[2]

N.C.

TX

TXN

RXN

[3]

[4]

[5]

[6]

RX

N.C.

[7]

[8]

[4]

[5]

[6]

[7]

[8]

[1]

[2]

[3]

EHV-CPU

Serial port

SG1

N.C.

N.C.

TX

TXN

RXN

RX

N.C.

Figure 2.35 Signal connection diagram for RS-422

EHV-CPU

Serial port

SG1

N.C.

N.C.

TX

TXN

RXN

RX

N.C.

[5]

[6]

[7]

[8]

[1]

[2]

[3]

[4]

Relay terminal

A

B

Twist pair cable

Relay terminal

[1]

EHV-CPU

Serial port

SG1

[2]

[3]

N.C.

N.C.

[4]

TX

[5]

TXN

[6]

RXN

[7]

RX

[8]

N.C.

Figure 2.36 Signal connection diagram for RS-485

2 – 36


The specifications in setting the serial communication port as a dedicated port is shown in the table 2.21.

In the dedicated port, a CPU program can be created or monitored from the programming device connected. Also, a monitoring system which uses a monitor available on the market can be constructed. Moreover, a variety of systems can be constructed by connecting a personal computer and creating software.

For setup and setting the connecting cables, please check beforehand whether it is used as the purpose.

Table 2.23 Specifications for a dedicated port

Item Specification

Transmission speed *1

Interface *1

4,800 bps

RS-232C

、

9,600 bps

、

19,200 bps

RS-422

、

38,400 bps

、

57,600 bps

RS-485

Maximum cable length

Connection mode (Maximum connected units)

Communication system

Synchronization system

Startup system

Transmission system

Transmission code

Transmission code configuration

15 m

1 : 1

Start bit (1 bit)

500 m

1 : 1 / 1 : N (32 units)

Half duplex system

Start-stop synchronization system

One-side startup system using the host side command

Serial transmission (Bit serial transmission)

ASCII

Parity bit (1 bit)

500 m

1 : 1 / 1 : N (32 units)

Stop bit (1 bit)

2

0

2

1

2

6

P

(Even-numbered parity)

Data (7 bits)

Transmission code outgoing sequence

Error control

Transmission unit

Maximum message length

Control procedure *1

out from the lowest bit in character units.

Vertical parity check, Sum check, Overrun check, Framing check

Message unit (variable length)

1,460 bytes (including control characters)

H-series dedicated procedure (High protocol)

Standard procedure 1 (Transmission control procedure 1),

Simple procedure (Transmission control procedure 2) *2

8-pin modular connector (RJ-45 type) Connector used

*1 Communication speed, communication interface, and control procedure are set using a Control Editor.

It is set to 1:1 for the transmission control procedure 1, RS-232C, and 38,400 bps at shipment.

The setup becomes effective when the power supply turns on next.

*2 Transmission control procedure 2 is a simple communication protocol not support communication via CPU link network.

2 – 37


[Specifications of RS-422 and 485 of Serial communication]

Serial communication system of EHV-CPU is Half duplex. Half duplex is a communication system which can transmit to only one direction of both directions communication. When the serial communication port for EHC=CPU is used as a dedicated port, EHV-CPU repeats an operation of responding the request transmitted from the peripheral device. Until the start of the receiving processing from the response end, the delay may occur. It is a communication error because the receiving is not performed properly if the request is transmitted before the receiving is started.

For the safety communication, leave an interval of 2ms between the response end and the receiving processing start.

Cannot receive

Peripheral device

EHV-CPU

Request

Response

Request t

EHV-CPU inside processing

Receiving processing

Transmitting processing

Receiving processing

2ms or less

Figure 2.37 Communication specifications of RS-422/485 of Serial communication

[Example]

In case of the serial communication to HMI (Human machine Interface) such as a touch panel and an indicator, set the transmission wait on HMI when communication error occurs frequently in EHV-CPU.

2 – 38


Serial communication port can be used as a general-purpose port. When it is specified as a general-purpose port, the transmitting and receiving operations are controlled by the user program. The specifications for the general-purpose port is shown in the table 2.24.

For setup and setting of the connected cables, please check beforehand whether it is user as the purpose.

Table 2.24 Specifications for a general-purpose port

Item Specification

Communication speed 300 bps

、

600 bps

、

1,200 bps

、

2,400 bps

、

4,800 bps

38,400 bps

、

57,600 bps

、

9,600 bps

、

19,200 bps

、

Maximum cable length

Connection mode (Maximum connected units)



Startup system

Transmission system

Transmission code


15 m

1 : 1

500 m

1 : 1 / 1 : N (32 units)

500 m

1 : 1 / 1 : N (32 units)

Half duplex system


One-side startup system using the host side command


Definition by user

Start bit (1 bit) Parity bit (None or Odd number or Even number)

Stop bit (1 or 2 bits)

2

0

2

1

2

6

2

7

P

Data (7 or 8 bits)


Error control

Transmission unit

Maximum message length

Control procedure

Control code

Connector used

out from the lowest bit in character units

Vertical parity check, Overrun check, Framing check

Message unit (variable length)

1,024 bytes (including control characters)

No procedure

Definition by user

8-pin modular connector (RJ-45 type)

* The setting information becomes effective when the power supply turns on next.

2 – 39


(1) 1: N communication (RS-485)

(A) Precautions

When performing 1 to N communication using RS-485, communicate in polling/selecting mode. When creating a ladder program, note the following points.

[1] Communicate by making sure the master station and slave station are using the same start code.

[2] The master station should transmit a request by specifying the station number of the slave station.

[3] The slave station should transmit a response only when the request from the master station is to the own station. Set the station so that it will reset the mode and wail for the next request in the event is received a request addressed to other station.

[4] The master station should transmit a new request after at least 20 ms (t p

in figure below) has elapsed from the time it completed receiving the last response from the slave station.

[5] The slave station should transmit a request after at least 20 ms (t s

in figure below) has elapsed from the time it completed receiving the request from the master station.

An example of 1 to N transmission sequence is shown below. This example shows a sequence in which the master station transmits a series of requests to the slave stations 1 to 3, and a sequence in which the slave station received the request transmits the response.

In Fig.2.28, a salient expressed in solid line indicates that the station received a transmission addressed to the own station, and a salient expressed in dotted line indicates that the station received a transmission addressed to other station.

Transmit

Master station

Receiving

Request to the slave station1 t p

Request to the slave station 2 t p

Request to the slave station 3 t s

Response to the master station

Transmit

Slave station 1

Receiving t s


Transmit

Slave station 2

Receiving t s


Transmit

Slave station 3

Receiving

Figure 2.37 1 : N Transmitting and receiving sequence

2 – 40


(B) Sample program

The following shows a simple program which communicates between one master station and three slave stations using RS-485.

[1] Mounting the module

(a) Master station side

EHV-CPU

0 1

Mounts the 16-point output module in the slot 1 of the basic base.

(b) Slave station side

EHV-CPU

0 1

Mounts the 16-point input module in the slot 0 of the basic base, and the 16-point output module in the slog 1 of the basic base.

[2] Assigning internal output

A sample program is created using the following assignments. In actual cases, change the I/O number etc. according to the application.

(a) Assigning internal output in the master station side

I/O No. Usage

WM 100 to 10E TRNS 0 command

Parameter area (s to s+14)

R 000 to 00B TRNS 0 command

Communication control bit area (t to t+11)

100 Transmission data setting completion flag

WR 0000 to 001F Transmission data area (32-word)

0100 to 011F Receiving data area (32-word)

4000 Slave station number for communication

WL

4001 Number of slave stations

001 to 003 Storage area for receiving data

2 – 41


(b) Assignment internal output in the slave station

I/O No. Usage

WM 0000 to 000E RECV 0 command

Parameter area （ s to s+14 ）

200 to 21F

300 to 31F

Transmission data area

Receiving data area （

（ 32-word

32-word

WR 0000 to 000E TRNS 0 command

Parameter area

（ s to s+14

）

）

）

0200 to 021F Transmission data area

（

32-word

）

0300 to 031F Receiving data area

（

32-word

）

4000 Slave station number during communication

WL 001 to 003 Storage area for receiving data

[3] Transmission format

Transmission formats between the master station and slave stations are as follows.

(a) Request format from the master station to the slave station. (A maximum of 3 bytes)

Start code Slave station No. End code

(b) Response format from the slave station to the master station. (A maximum of 5 bytes)

Start code Own station No.

Data End code

*: Any data can be set except the end code (0DH). The slave station number is set in this sample program.

[4] Receiving result in the master station side

If the transmission between the slave stations 1 to 3 complete successfully, the following data is set in the

WL area of the master station. The slave station sets its own slave station number as part of the data.

WL0001

WL0002

WL0003

0001H

0002H

0003H

Description

Received data from the slave station 1.



2 – 42


[5] Program

(a) Program on the master station side (with three slave stations)

R7E3

R7E3

R1

R7E3

DIF

R1

WR4001

<=

WR4000

R100

TD63 DIF

WR4001 = 3

WM103 = H0

DM104 = ADR( WR0 )

WM106 = 32

DM107 = ADR( WR100 )

WM109 = 32

WM10A = H0

WM10B = H8002

WM10C = H800D

WM10D = H6

WM10E = H6

TRNS0( WM100, R0 )

WL0 (WR4000) = WR102

WR4000 = 0

WR4000 = WR4000 + 1

WR0 = 3

WR1 = H200 OR WR4000

WR2 = HD00

R100 = 1

R5 = 1

R0 = 1

R100 = 0

WY10 = WY10 + 1

MCS0

S

MCR0

R

TD63

(00001)

Sets the number of slave stations to 3.

(00002)

Time out: None

Specifying head in transmission area: WR0

Transmission area size: 32-word

Specifying head in receiving area: WR100

Receiving area size: 32-word

Receiving data length: Not specified

Start code: 02H

End code: 0DH

Transmission speed: 19.2kbps

Transmission format: 8-bit, Even-numbered parity, 1 stop bit

(00003)

(00004)

Enable the 5th circuit through the 7th circuit only when TRNS 0 command has been completed successfully or during the first scan after RUN.

(00005)

(WL0 + Station No.)

←

Set the receiving data

(00006)

Returns the station No. to the head when the maximum number of stations has been reached.

(00007)

Sets the transmission data.

Updates the station No.

Number of transmission bytes: 3 bytes

Sets the start code and the station No.

Sets the end code.

Turn on the start flag.

(00008)

(00009)

1ms 20

(00010)

Start up TRNS 0 after 20 ms has been elapsed.

Sets to the continued receiving after transmission is completed.

2 – 43


(b) Program in the slave station side (slave station No. 2)

R7E3

WR4001 = 2

WL0 (WR4001) = WR4001

R7E3

WM3 = H0

DM4 = ADR( WM200 )

WM6 = 32

DM7 = ADR( WM300 )

WM9 = 32

WMA = H0

WMB = H8002

WMC = H800D

WMD = H6

WME = H6

R7E3

RECV0 ( WM0, R200 )

WR3 = H0

DR4 = ADR( WR200 )

WR6 = 32

DR7 = ADR( WR300 )

WR9 = 32

WRA = H0

WRB = H8002

WRC = H800D

WRD = H6

WRE = H6

R301

R7E3

DIF

R201 DIF

TRNS0 ( WR0, R300 )

R200 = 1

R301 = 0

R100

WR4000 = WM301 AND HFF

R100 = WR4000 == WR4001

CJMP 0 (R100)

CAL 0

LBL 0

R201 = 0

WR200 = 5

WR201 = H200 OR WR4001

WR202 = WL0 (WR4001)

WR203 = HD00

R400 = 1

R100 = 0

2 – 44

(00001)

Sets the own station No. to 2.

(WL0 +Own station No.) ← Sets the own station No.

(00002)

Time out: None

Specifying head in transmission area: WM200


Specifying head in receiving area: WM300



Start code: 02H

End code: 0DH



(00003)

(00004)

Time out: None

Specifying head in transmission area: WR200


Specifying head in receiving area: WR300



Start code: 02H

End code: 0DH



(00005)

(00006)

Starts up RECV 0 only when TRNS 0 has been completed successfully or during the first scan after RUN.

(00007)

Stores the station No. for transmission of the master station.

Calls subroutine 0 if the station No. does not match the own station No.

(00008)

Sets the transmission data.

Number of transmission bytes: 5 bytes

Sets the start code and the own station

No.

Sets the value of (WL0+Station No.) to the transmission data

R400

TD63 DIF


R300 = 1

R400 = 0

WY10 = WY10 + 1

END

SB 0

R200 = 1

R201 = 0

RECV0 ( WR0, R200 )

RTS

TD63

(00009)

1ms 20

(00010)

Starts up TRNS 0 after 20 ms has been elapsed.

(00011)

(00012)

Subroutine 0

Turns on the receiving execution flag.

Turns off the receiving normal completion flag.

(00013)

(00014)

2 – 45


2.3.4 Modem connection function

EHV-CPU is equipped with a model connection function. The model connection function can be controlled using task codes. The setup on the Control Editor is needed to use this function.

Refer to the following table for communication specifications.

If a difference of communication speed between two operating modems, connecting between them may be difficult.

Therefore, please combine to eliminate any difference in communication speeds.

(1) Configuration

PC EHV-CPU

Modem Modem

RS-232C

(MAX 57.6 kbps)

Commercial line

Figure 2.38 Connection configuration of modem

(2) Specifications

Table 2.25 Specification for Modem connection function

Item Specification

Communication speed


2,400 bps

、

4,800 bps

、

9,600 bps

、

19,200 bps

、

38,400 bps

、

57,600 bps

Full duplex system (Communication program is half-duplex control.

）


Transmission system

Transmission code




ASCII code

Start bit (1 bit) Parity bit (1 bit)

Stop bit (1 bit)


Error detection

2

0

2

1

2

6

P

(Even-numbered parity)

Data (7-bit)

out from the lowest bit (20) in character units.

Vertical parity check, Overrun check, Framing check

Control procedure

Startup system

Time out detection at connecting modem

H-series dedicated procedure (High protocol)

One-side startup system by the host side command

Sets by Control Editor

Time out detection at communicating modem

Sets by Control Editor

* ER signal cannot be controlled. Therefore, the line is cut by commands or control by connecting the line is needed using other I/O.

2 – 46


Pin No.

Table 2.26 List of signals for Serial communication port at connecting modem

Signal Direction Meaning abbreviation

CPU Modem

2]

3]

CD1

ER1

Notification signal during carrier received. Connects to CD in the modem.

Communication enable signal of the terminal

5] SD1 Data transmitted by CPU. Connects to SD in the modem.

6] RD1 received

7]

8]

DR1

RS1

Communication enable signal of the modem. Connects to DR in the modem.

Transmission request signal. Connects to RS in the model.

(3) AT command

AT command is used for setting various setup of a modem and set using the host computer. EHV-CPU generates the AT command for the initial setting automatically. The AT command is not used for other purpose.

Refer to the instruction manual of the modem maker for the AT command.

In AT commands, an instruction transmitted to the modem from the host is called “command” and the character string in response to the “command” returned to the host from the mode is called “result code”.

At commands always begins the character string “AT” and a return code is input at the end of the command.

However, A/ is excluded. The command that follows the “AT” can have multiple inputs in a single line.

Example)

A T &C 1 &S 0 P 2 CR LF

AT command CD signal: depends on the carrier of counter-party

DR signal: always ON 20pps (Pulse setting)

(A) Format

[1] AT command format

A T Command Parameter Command Parameter

…

[2] Result code format

CR LF Result code (word)

Result code (number) CR LF

CR LF

CR LF

2 – 47


(B) List of commands

（ extract

）

[1] AT command

Command Function Example

AT Automatically recognizes data format.

－

A/ Re-executes the response directly preceding.

ATDmm Dial

ATEn

ATHn

Command error (echo-back the input character string in the modem)

Line ON/OFF

0: Excluding

1: Including

0: On hook (disconnect)

－

ATD12345678

ATE0

ATPn Pulse setting (dial) 0,1: 10 pps

ATH0

ATH1

ATP0 、 ATP1

ATP2

ATQ0

ATSn=X

ATVn

AT&Cn

AT&Dn

AT&Sn

AT&Rn

Sets S register value.

Result code display format 0: Number

1: Word

CD signal control 0: Always ON

1: Depends on the carrier of counter-party modem

ER signal control 0: Always ON

2: Line disconnection by turning from ON to OFF

ATT

ATS0=0

ATV0

ATV1

AT&C0

AT&C1

AT&D0

AT&D2

AT&D3

DR signal

3: Resets software by turning from ON to OFF

0: Always ON

1: Depends on sequence

2: Depends on CD signal

RI(CI) signal control 0: ON from calling start till communication start

1: ON from calling start till communication end

2: ON/OFF in synchronization with the call signal

AT&S0

AT&S1

AT&S2

AT&R0

AT&R1

AT&R2

[2] S register

S register

S0

S2

S3

S4

[3] Result code

Set value

0 No automatic receiving

1 to 255

0 to 127 (43 [+])

0 to 127 (13 [CR])

0 to 127 (10 [LF])

Function

Setting for automatic receiving / receiving ring count

Escape code setting

CR code setting

LF code setting

Number format

Word format

0 OK

Meaning

2 RING

4 ERROR Command

5

6

CONNECT 1200

NO DIAL TONE

1200 bps Connection

Cannot hear dial tone

7

8

10

11

12

13

BUSY

NO ANSWER

CONNECT 2400

CONNECT 4800

CONNECT 9600

CONNECT 14400

Busy signal detected

No tone heard

2400 bps Connection

4800 bps Connection

9600 bps Connection

14400 bps Connection

2 – 48


(C) Sequence

An example of a communication sequence using the Omron-made modem ME3314A is shown below.

[1] Receiving sequence

Modem

EHV-CPU

2

DR on

CR

ER on

(a)

ATE0Q0V0&C1&S0 CR LF

Initial setting (*1)

2 CR

(b)

0 CR

Waiting for receiving

Mode,

2 CR

EHV-CPU

(c)

Forced connection when 3 rings detected

Modem

EHV-CPU

(d)

ATA CR LF

1 CR

Port communication begins from here

Receiving complete

(a) The PLC generates the AT command for performing the initial setting.

(b) If the initial setting is OK, the modem returns “0”.

(c) The PLC detects the result code “2” three times in the status waiting for receiving.

(d) Connects the modem.

[2] Disconnect sequence

Modem

EHV-CPU

Port communication end

3 CR

(a)

Line disconnected (*2)

(a) The PLC disconnects the line if the result code “3” is returned form the modem.

*1: The initial setting for modem by EHV-CPU sets the minimal items as follows. Therefore, please set the modem by the AT command connecting a personal computer with the modem before connecting with EHV-CPU. (Set the DR signal to always ON.) However, do not change the following initial setting.

Initial setting contents

Command echo

Result code

Result code display forma

: Excluding

: Including

: Number format

*2: Please generate a task code (H1C) of the disconnected request from the host side before disconnecting the line in practice.

2 – 49


2.3.5 Connection between Serial communication port and Peripheral device

Table 2.27 shows cables to connect a peripheral unit to RS-232C interface for serial communication port of

EHV-CPU.

Table 2.27 Peripheral unit connection configuration

Peripheral unit Calbe

Programming software

Control Editor

WVCB02H EH-RS05

EH-VCB02

2 – 50


2.3.6 Connection method for RS-422 / 485 communication

Serial communication port of EHV-CPU can communicate with an interface of RS-422 / 485. Communication of

1:N stations can be performed using H-series dedicated control procedure (high-protocol) or a general-purpose procedure with a general-purpose port command (TRNS 0, RECV 0). Figure 2.30 and 2.31 show examples when a connection is made for 1:N stations.

And the connection for the communication in 1:1 made is the connection of only the first EHV-CPU.

(1) In case of RS-422

SD (+)

SD (-)

RD (+)

RD (-)

[7] RX

[6] RXN

[5] TXN

[4] TX

EHV-CPU

(1st CPU)

[7] RX

[6] RXN

[5] TXN

[4] TX

EHV-CPU

(2nd CPU)

[7] RX

[6] RXN

[5] TXN

[4] TX

EHV-CPU

(32nd CPU)

Host

Host

Relay terminal block


Figure 2.39 Connection for 1:N station communication by RS-422

(2) In case of RS-485

SD (+)

SD (-)

RD (+)

RD (-)

Twist pair cable

[7] RX

[6] RXN

[5] TXN

[4] TX

EHV-CPU

(1st CPU)

[7] RX

[6] RXN

[5] TXN

[4] TX

EHV-CPU

(2nd CPU)


[7] RX

[6] RXN

[5] TXN

[4] TX

EHV-CPU

(32nd CPU)



Figure 2.40 Connection for 1:N station communication by RS-485


2 – 51


2.4 USB communication port

USB communication port of EHV-CPU supports USB2.0. (Transfer speed is up to 12Mbps in FULL Speed.)

The USB communication port is a dedicated port for connecting the Control Editor. It can be programmed and monitored. Table 2.28 shows specifications for the USB communication port.

Table 2.28 Specifications for USB communication port

Item Specification

Standard

Transfer speed


Conforms to USB2.0

FULL Speed (Maximum 12Mbps)

For Control Editor connection

!

Caution

If it is connected using the Control Editor and the USB communication port, the communication error may occur on the Control Editor in noise environment. Please connect using serial port or LAN port if the communication error occurs in noise environment. And for a stable communication, do not bring a communication cable close to other wiring, and do not put the cable and the wiring in the same duct.

2 – 52

Appendix 1 Cable Connection Diagram

A cable connection diagram in case of connecting peripheral devices with EHV-CPU with a RS-232C interface of a serial port is shown below.

EHV-CPU


SG

CD

ER1

ER2

SD

RD

DR

RS

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

EH-VCB02

Personal computer

(D-sub 9 pins)

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

DCD

RxD

TxD

DTR

GND

DSR

RTS

CTS

RI

Figure A-1.1 EH-VCB02 connection diagram

EHV-CPU


SG

CD

ER1

ER2

SD

RD

DR

RS

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

H-series CPU

(D-sub 15 pins)

Personal computer

EH-RS05 WVCB02H

[1] [1] DCD

SD [2] [2] RxD

RD

RS

CS

DR

[3]

[4]

[5]

[6]

[7]

[8] [8]

[9]

TxD

DTR

GND

DSR

RTS

CTS

RI

PG5 [9],[10]

CD [11],[12]

[13]

[14]

[15]

[3]

[4]

[5]

[6]

[7]

Figure A-1.2 EH-RS05 + WVCB02H connection diagram

A – 1

RTS WM300 Specifications

HITACHI PROGRAMMABLE CONTROLLER

APPLICATION MANUAL for NETWORK

Revision History

Table of Contents

Chapter 1 Network Configuration

1.1 Communication port for CPU module

1.2 Network configuration for Communication module

Chapter 2 Specification of Communication port for CPU module

2.1 Features

2.2.1 Task code communication port

2.2.2 ASR communication port

2.2.3 Reset function for Ethernet communication port

2.2.4 NTP client function

2.2.5 Factory

2.3 Serial communication port

2.3.4 Modem connection function

2.3.5 Connection between Serial communication port and Peripheral device

2.3.6 Connection method for RS-422 / 485 communication

2.4 USB communication port

Appendix 1 Cable Connection Diagram

Related manuals

Hitachi

EH-150 Type I

Hitachi

EHV-CPU1051

Mitsubishi Electric

GOT2000 Series

Mitsubishi Electric

GOT2000 Series

IDEC

External Device

IDEC

NV4 External Device

IDEC

B1698

ABB

RELION 650 SERIES

ABB

Relion 670 series