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第二部分 CC-Link 的工作原理 PowerPoint PPT Presentation


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第二部分 CC-Link 的工作原理. CC-Link 的物理结构 公共数据区域的概念 数据映射表 循环数据的传送 瞬时数据的传送 数据传送时间分析. Feature of CC-Link. Complete RAS Function. ( R eliability, A vailability, S erviceability). Control by a master board for PC is available, too. SB0080 SW0080 ~0083. Master station.

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第二部分 CC-Link 的工作原理

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Cc link

第二部分

CC-Link的工作原理

  • CC-Link的物理结构

  • 公共数据区域的概念

  • 数据映射表

  • 循环数据的传送

  • 瞬时数据的传送

  • 数据传送时间分析


Cc link

Feature of CC-Link

Complete RAS Function

(Reliability, Availability, Serviceability)


Cc link

Control by a master board for

PC is available, too

SB0080

SW0080

~0083

Master station

Stand By Master station

(Local Station)

Easy

Configuration

Software

Network Control

Optical repeater(max.7.6km)

Down

for SI, GI fiber cable

Rotary Joint(10Mbps)

Local Station

From 3rd party

(CC-Link)

Many kinds of Partners Products

Wireless Repeater (Infrared ray)

Repeater(T-branch)

full range of communication speed supported

up to 2.5Mbps、

0~100m

CC-Link Network System

Local Station

This is the slave station that enables N:N cyclic communication

with Master and / or other Local and transient communication.

Remote Device Station

Input / Output (bit data) and numerical data

(word data) can be exchanged by this station.

Master Station

This controls all slave stations connected to CC-Link network.

One master station is needed for a CC-link system.

Remote I/O Station

Only Input / Output (bit data) can be handled by this station.

Intelligent Device Station

This station can perform data exchange, such as Input /

Output (bit data) and numerical data (word data).

And transient communication is also available


Cc link

Specifications of CC-Link

Specifications

Item

10Mbps: 100m (4.3Km with Optical repeater)

5Mbps: 160m (4.48Km with Optical repeater)

2.5Mbps: 400m (5.2Km with Optical repeater)

625Kbps: 900m (6.7Km with Optical repeater)

156kbps:1,200m (7.6Km with Optical repeater)

Communication Speed & Total Length of CC-Link Cable

Data size of Cyclic

24 bytes / 1 station

Data size of Transient

960 bytes (150 bytes / packet: Master =>Slave)

(34 bytes / packet: Slave => Master)

3.4 ms (Remote I/O :64 stations)

Link Scan Time

Number of connectable stations

64 stations (without any repeater)


Cc link

Feature of CC-Link

Cyclic Communication

Local

Master

HMI

Robot

Controller

Remote I/O

Analog I/O

Robot

Master

Sensor

Valve

Inverter

Rx/y

Bit

Bit

Rx/y

Rx/y

Bit

Bit

Rx/y

Rx/y

Bit

Bit

Rx/y

Rw

Rw

Word

Word

Rx/y

Bit

Bit

Rx/y

Rw

Rw

Word

Word

Rx/y

Bit

Bit

Rx/y

Rw

Rw

Word

Word

Remote I/O:2,048bit Remote Register:512word


Cc link

Feature of CC-Link

Transient Communication (Max.960 bytes)

Master

Master

150 byte / 1 Scan=>

Local

HMI

Message

<=34 byte / 1 Scan

Message

Message

Robot

Controller

Digital I/O

Analog I/O

Robot

Sensor

Valve

Inverter

Rx/y

Bit

Bit

Rx/y

Rx/y

Bit

Bit

Rx/y

Rx/y

Bit

Bit

Rx/y

Rw

Rw

Word

Word

Rx/y

Bit

Bit

Rx/y

Rw

Rw

Word

Word

Rx/y

Bit

Bit

Rx/y

Rw

Rw

Word

Word

Remote I/O:2,048bit Remote Register:512word


Cc link

RX,RWr

RY,RWw

RX,RWr

RY,RWw

RY,RWw

RX,RWr

Feature of CC-Link

Inter-Controller Network

De-central Control system can be realized by using N:N communication between controllers with cyclic communication.

Intelligent

Device

Local

Master

Analog I/O

Inverter

Sensor

Valve


Cc link

Feature of CC-Link

Link Scan Time

4ms/64 Stations (2048bits Communication speed / 10Mbps)

Rough value of CC-Link Scan Time

(In case cyclic communication is used under 10Mbps communication speed)

6

5

4

Only Remote I/O

connected

3

Link Scan Time[mS]

Only Remote Device

connected (Each one

station occupied)

2

Only Local / Intelligent Device

connected (Each one

station occupied)

1

0

0

20

40

60

Number of stations


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Master

Slave 1

Slave 2 …………

Slave n

Polling to slave 1

+ Sending data (refresh data) to all slave stations

Polling to slave 1

+ Sending data (refresh data) to all slave stations

(1)

(1)

(1)'

(1)'

Response (refresh data) from slave 1

(Receivable at all stations)

Response (refresh data) from slave 1

(Receivable at all stations)

(2)

(2)

Polling to slave 2

Polling to slave 2

(2)'

(2)'

Response (refresh data) from slave 2

(Receivable at all stations)

Response (refresh data) from slave 2

(Receivable at all stations)

(3)

(3)

Polling to slave 3

Polling to slave 3

Response (refresh data) from slave n

(Receivable at all stations)

Response (refresh data) from slave n

(Receivable at all stations)

(n)'

(n)'

Feature of CC-Link

Communication method : Protocol (Broadcast-Polling)


Cc link

Feature of CC-Link

Communication LSI (MFP)

Since MFP (Mitsubishi Field network Processor) carries out communication process between master and slave stations, high speed and stable communication is realized.


Cc link

CRC

A1

A2

ST1

ST2

DATA(Max.918byte)

Message

(Max.150byte)

CRC

RY

(Max.256byte)

RWw

(Max.512byte)

CRC

A1

A2

ST1

ST2

RX

(Max.16byte)

RWr

(Max.32byte)

CRC

Message

(Max.34byte)

CRC

A1

A2

ST1

ST2

Feature of CC-Link

Frame Format

(1) Standard Frame (Max.930byte)

(2) Polling + Refresh data (Master => Local / Intelligent device station)

(3) Response (refresh data) from slave (Local / Intelligent device => Master, Local => Local)

Data rate in frame is 98% in maximum => Efficient Data transfer


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远程终端的形式


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数据形式

Max. logical remote devices : RX:2048 bits + RY: 2048 bits + RWr:256 words + RWw: 256 words = 768 words


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远程设备/数据形式的关系


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传送方法

  • 循环数据的刷新

    • 刷新设备:RX, RY, RWr, RWw

    • 刷新范围取决于远程终端的数量和型号

    • 刷新所有连接的站点

    • 刷新操作无需梯形图编程. 注:网络模块与CPU之间的刷新需要编程。


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传送方法

  • 信息传送

    • 无循环数据传送

    • 对于主站/就地站/智能远程设备有效

    • 需要在程序中添加CC-Link命令(只对AnSH, QnA, QnAS有效)

    • 也通过G4单元进行程序转换


Cc link

循环的数据刷新

远程I/O,设备,

智能站

主站

就地站

就地站

RX

RX

RX

RX

RY

RY

RY

RY

RWr

RWr

RWr

RWr

RWw

RWw

RWw

RWw

Data source

Original data destination


Cc link

诊断设备

  • SB, SW : 诊断继电器/寄存器

  • 监控网络的状态和错误

CPU 设备内存

主站/就地站的缓冲寄存器

FROM/TO

自动刷新参数

SB0 to 3F

位设备

SB40 to 1FF

SW0 to 3F

字设备

SW40 to 1FF

注;QnACPU的SB/SW不能被用作CC-Link SB/SW的刷新区

应使用其它CPU设备


Cc link

内存图

主站/就地站模块

的内存图

网络参数区由梯形图程序或QnA的自动刷新参数设定。

只有PLC主站需要。

网络参数

远程输入区由远程I/O,设备,智能站以及PLC就地站刷新。

RX

RY

由远程输出区刷新远程I/O,设备,智能站和PLC就地站。

RWr

远程寄存器输入区由远程设备,智能站以及PLC就地站刷新。

RWw

由远程寄存器输出区刷新远程设备,智能站和PLC就地站。

CC-Link 诊断继电器

SB

SW

CC-Link 诊断继电器

Auxiliary memory maybe accessed from other master/local PLC by

RIRD or RIWT commands

自由使用的内存


Cc link

循环的数据刷新

远程I/O,设备,

智能站

主站

就地站

就地站

RX

RX

RX

RX

RY

RY

RY

RY

RWr

RWr

RWr

RWr

RWw

RWw

RWw

RWw

Data source

Original data destination

Copied data

Not available


Cc link

怎样访问内存

主站/就地站模块

的内存图

QnA/QnAS

AnSH

AnN/AnA/AnU/AnS

自动刷新参数

RLPA or TO

(Note 1)

TO

网络参数

RRPA

or

FROM/TO

(Note 1)

FROM/TO

RX

RY

RWr

RWw

SB

SW

FROM/TO

FROM/TO

FROM/TO

Random access

buffer

Note 1: 建议使用FROM/TO


Cc link

时间表

主站

Active

备用主站

状态

Local

Refresh data keeper

Master

输往远程

终端的数据

From Master

*1

From Stand-by master

T

SB70 @ 备用主站 (by system)

SB1 @ 备用主站 (by ladder)

SB43 @ 备用主站 (by system)

*1 : 远程单元维持最后的状态。


Cc link

开关时间

开关时间因波特率以及slave 单元数(远程站和就地站)

的不同而不同.


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