基于CC—Link网络的PLC控制系统
0 引 言
随着计算机信息网络技术的飞速发展,以PLC为核心的工业控制系统也向着大规模、网络化方向发展。各PLC生产企业都开发有自己的网络产品,并不断增强其网络的联接能力。三菱公司的工业控制网络产品很丰富,可以构成各种档次的网络系统,以适用于各种层次的工业自动化网络的不同需求。其**代表性的三种网络为:信息与管理层的以太网(Ethernet)、管理与控制层的局域令牌网(ELSECNET/H)、CC一Link开放式现场总线设备网。本文仅对CC—Link开放式现场总线设备网进行研究。
1 CC—Link网络的特点及功能
1.1 CC—Link网络的特点
CC—Link(Control&Commurlication Link,控制与通信链路系统),是三菱电机新近推出的开放式现场总线,其数据容量大,通信速度多级可选择,而且它是一个复合的、开放的、适应性强的网络系统,能够适应于较高的管理层网络到较低的传感器层网络的不同范围。CC—Link是一个以设备层为主的网络,一般情况下,CC—Link整个一层网络可由1个主站和64个从站组成。网络中的主站由PLC担当,从站可以是远程I/O模块、特殊功能模块、带有CPU和PLC本地站、人机界面、变频器及各种测量仪表、阀门等现场仪表设备。且可实现从CC—Link到AS—I总线的联接。CC—Link具有高速的数据传输速度,**可达10 Mb/s。CC—Link的底层通信协议遵循RS 485,一般情况下,CC—Link主要采用广播一轮询的方式进行通信,CC—Link也支持主站与本地站、智能设备站之间的瞬间通信。
1.2 CC—Link网络的功能
CC—Link网络具有完善的RAS(Reliability,A—vailability,Serviceability)功能。即自动返回、切断从站、通过链接继电器/寄存器的错误检测功能。
2 CC—Link总线通信
2.1 CC—Link的通信原理
CC—Link的通信形式可分为2种方式:循环通讯和瞬时传送。循环通讯意味着不停地进行数据交换。各种类型的数据交换即远程输入RX,远程输出RY和远程寄存器RWr,RWw。一个从站可传递的数据容量依赖于所占据的虚拟站数。占据一个从站意味着适合32位RX和/或RY,并以每4个字进行重定向。如果一个装置占据两个虚拟站,那么它的数据容量就扩大了一倍。除了循环通信,CC—Link还提供主站、本地站及智能装置站之间传递信息的瞬时传送功能。信息从主站传递到从站,信息数据将以150 B为单位分割,并以每批150 B传递。若从从站传递到主站或其他从站,每批信息数据**为34 B。瞬时传送需要由专用指令FROM/TO来完成,瞬时传送不会影响循环通信的时间。限于篇幅,本文只介绍了主站与远程设备站之间的通信关系,其通信关系如图1所示。主站与远程设备站之间的通信原理如下:
(1)PLC系统电源接通时,PLC CPU中的网络参数传送到主站,CC—Link系统自动启动;
(2)远程设备站的远程输入RX自动储存在主站的“远程输入RX”缓冲存储器中;
(3)储存在“远程输入RX”缓冲存储器中的输入状态储存到用自动刷新参数设置的CPU软元件中;
(4)用自动刷新参数设置的CPU软元件开/关数据存储在“远程输出RY”缓冲存储器中;
(5)根据“远程输出RY”缓冲存储器中存储的输出状态,远程输出RY自动设定为开/关(每次链接扫描的时候);
(6)用自动刷新参数设置的CPU软元件的传送数据存储在“远程寄存器RWw”缓冲存储器中;
(7)存储在“远程寄存器RWw”缓冲存储器中的数据自动送到每个远程设备站的远程寄存器RWw中;
(8)远程设备站的远程寄存器RWr的数据自动存储在主站的“远程寄存器RWr”缓冲存储器中;
(9)存储在“远程寄存器RWr”缓冲存储器中的远程设备站的远程寄存器RWr数据存储在用自动刷新参数设置的CPU软元件中。
2.2 CC—Link通信的初始化
CC—Link通信的初始化实际上就是指CC—Link的网络参数设置。网络参数指:站的信息和站号。通信的初始化对于启动数据链接非常重要,CC—Link通信初始化设置方法只要在三菱GPPW编程软件的网络配置菜单中设置相应的网络参数,远程I/O信号就可自动刷新到CPU内存,还能自动设置CC—Link远程元件的初始参数。
3 CC—Link网络控制系统的设计
3.1 网络控制系统的构成
图2为炉窖网络控制系统原理图。控制系统设计4条生产线,图2只给出炉窖网络控制’系统中的1条生产线,其余3条从站的配置是相同的。为了提高整个控制系统的安全性以及可靠性,系统采用了双机冗余措施。在双主机系统中,二者处于对等地位,并且同时可以监测对方的运行情况以及网络的冲突侦听,并相互间传递心跳信息,一旦发现对方系统出现故障或者连接的网络故障,监测方立即接管测控任务,从而保证了系统在任何时候系统主机的完整性和完好性,只要主机和网络安全,控制系统便会安全,实时性便可得到保证。两台冗余主机的配置均采用Q系列CPU,CC—Link总线模块QJ61BTll,QJ71E71—100以太网模块,主机配置相同以保证二者的相近似,满足系统相似性原理,对控制系统的安全性设计提供了保证。
从站采用Q02H CPU智能控制单元,主要作用是管理模拟量采集(A/D)模块、模拟量输出(D/A)模块、数字量输入(DI)/数字量输出(DO)的端口I/0操作以及计数定时模块的设定,并且将所采集的数据负责上传到主站,并从主站获得的控制参数下传到模拟量输出、数字量输出模块,控制相应的执行结构。A/D,D/A,DI/DO以及计数定时模块分别用于采集煅烧炉中的温度、给控制三相异步电机旋转的变频器提供O~10V控制信号源、控制电机的起停以及监测控制开关的状态、控制三相异步电机旋转的时间等。模块的选用为:模拟量采集:AJ65BT一64AD;模拟量输出:AJ65BT一64DAV;数字量输入/输出:AJ65BTB2—16DR;热电偶输入:AJ65TB一68TD;高速计数器:AJ65BT—D62。
为了将系统集成为具有测量、控制、管理功能于一体的测控系统,在车间级的Intranet中集成了生产在线数据库以及控制参数与工艺数据库服务器,生产在线数据库服务器主要用于管理当日当班的人员、计划调度以及生产完成情况,工艺数据库服务器主要用于记录生产工艺参数、重要工段以及重要设备的定时抽检数据、故障几率等,便于了生产管理。整个程序的设计功能见图3。
3.2 网络控制系统的功能
(1)整个网络监控系统采用CC—Link现场总线,可高速地将现场数据传至主站进行管理。
(2)上位机(PC)将操作指令通过从站1CPU传送给受令执行单元执行操作,远程执行单元将工作状态通过从站CPU传送给上位机(PC)。上位机(PC)将车间中所有控制的工作状态(开、关、报警)信息显示出来供操作人员监控。上位机(PC)接到报警和停线信息立即打印故障信息并计时、统计停线时间,并通过声卡驱动音箱进行语音提示。
(3)主站和从站采用三菱Q系列CPU负责CC—Link网络的管理,以及将数据送到上位机(PC)进行分析和将中控室发出的指令送至现场从站。
(4)为保证系统内大量的数据传输,每一条生产线的参数采集和控制由一台CC—Link从站完成。所有测控参数测量值通过CC—Link与从站通信。
4 结 语
实践证明,利用CC—Link开发的网络控制系统具有实时性、开放性、保护功能齐全、通信速率快、网络先进、布线方便等优点,有利于分散系统实现集中监控,提高系统自动化水平,减轻工人劳动强度,减少事故率,提高设备的使用寿命,节能降耗,提**率,降低了成本。
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【主营产品】
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2:Invensys Triconex: 冗余容错控制系统、基于三重模件冗余(TMR)结构的最现代化的容错控制器。
3:Westinghouse(西屋): OVATION系统、WDPF系统、WEStation系统备件。
4:Rockwell Allen-Bradley: Reliance瑞恩、SLC500/1747/1746、MicroLogix/1761/1763/1762/1766/1764、
CompactLogix/1769/1768、Logix5000/1756/1789/1794/1760/1788、PLC-5/1771/1785等。
5:Schneider Modicon(施耐德莫迪康):Quantum 140系列处理器、控制卡、电源模块等。
6:ABB:工业机器人备件DSQC系列、Bailey INFI 90等。
7:Siemens(西门子):Siemens MOORE, Siemens Simatic C1,Siemens数控系统等。
8:Motorola(摩托罗拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
9:XYCOM:I/O 、VME板和处理器等。
10:GE FANUC(GE发那科):模块、卡件、驱动器等各类备件。
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12:Bosch Rexroth(博世力士乐):Indramat,I/O模块,PLC控制器,驱动模块等。
13:Woodward(伍德沃德):SPC阀位控制器、PEAK150数字控制器。
14:工业机器人系统备件。
15: 英维斯(TRICONEX):TRICON DCS的系列,如:3805E
另外还有 雅马哈(YAMAHA), 贝加莱(B&R), 欧姆龙(OMRON), KEBA, 安川(YASKAWA) 等品牌的停产备件。
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AMCI Incremental Encoder DuraCoder DC25F-B1S1XS-0A new
AMCI Transducer HT-20 Advanced Micro Controls Geared Resolver
AMCI 3102i 2 Axis Motion Controller Module For Allen-Bradley Micrologix PLCs
AMCi 2541 HIGH SPEED PROGRAMMABLE LIMIT SWITCH MODULE
AMCI DURACODER DC25F-B1A8AS
AMCI 1731-03 PLC CONTROLLER ENCODER MODULE CARD - - FREE SHIPPING
AB Allen Bradley AMCI 3601 MicroLogix 1 Axis Stepper Controller
Advanced Micro Controls AMCI 3601 | 1-Axis Stepper Module for CompactLogix
AMCI ADVANCED MICRO CONTROLS TRANSDUCER Mod. H25-F1E -NEW-
GENUINE SAFARI SNORKEL TO SUIT WRANGLER TJ 10/99 AMCI6 V6 PETROL SS1055HF
GENUINE SAFARI SNORKEL TO SUIT WRANGLER TJ 10/92 AMCI6 V6 PETROL SS1050HF
GENUINE SAFARI SNORKEL TO SUIT WRANGLER TJ 10/92 AMCI6 V6 PETROL SS1050HF
GENUINE SAFARI SNORKEL TO SUIT WRANGLER TJ 10/99 AMCI6 V6 PETROL SS1055HF
Advanced Micro Controls Inc AMCI SD3520 35VDC 0.125-2A Stepper Drive
Warranty AMCI ADVANCED MICRO CONTROLS INC STEPPER MOTOR DRIVE SD17060
AMCI NX1F4D Nexus Multi Axis Stepper Controller w/ Devicenet Option
Advanced Micro Controls AMCI 2732-05 PLC Series Controller Control Unit
New AMCI SD17040B Stepper Motor Drive, In: 1-Phase 115VAC, Out: 170VDC at 4A Max
AMCI Advanced Micro Controls Inc Programmable Encoder iPCE-10-3 New
Advance Micro Controls AMCI 3601 for CompactLogix, 1 Axis Stepper Controller
AMCI 1542 Advanced Micro Controls Resolver Interface Module
Allen Bradley AMCI PLC Series Encoder 1743 Advanced Micro Controls Inc.
AMCI Compact I/O 1-AXIS STEPPER CONTROLLER MODULE 3601
AMCI H25-FS Resolver Transducer H25FS
AMCI ADVANCED MICRO CONTROLS PLC SERIES ENCODER MODULE 1742
AMCI 1761-01 PLC CONTROLLER ENCODER MODULE CARD - - FREE SHIPPING
AMCI Advanced Motion Controls PS16L60 14074-0001 60 VDC 13 Amp Power Supply
AMCI, for Allen Bradley, PLC-5, Resolver Interface, 1761-21, New, in Sealed Box
AMCI, For Allen Bradley, SLC 500, 7551-14, Mold-Rite 2100, Position Sensor, Nice
AMCI 7561 for Allen Bradley SLC 500 SSI Interface 7561 163A
Allen Bradley AMCI PLC Series Encoder 1743 Advanced Micro Controls Inc.
AMCI 1761 PLC Series Encoder -
AMCI ADVANCED MICRO CONTROLS TRANSDUCER Mod. H25-F1E -NEW-
AMCI ADVANCED MICRO CONTROLS ENCODER MODULE 1741-05
AMCI iPLC-1-7 PROGRAMMABLE LIMIT CONTROLLER 115 VAC NEW IN BOX
AMCI HT-20 ADVANCED MICRO CONTROLS GEARED RESOLVER
AMCI, For Allen Bradley, SLC 500, Resolver Interface, 1531, Very Good Condition
3601 AMCI Stepper Controller Card
AMCI 8513 EASYPack Packaging Control PLC Module For Allen-Bradley SLC500 Qty
AMCI 1542 RESOLVER INTERFACE
AMCI 1542 RESOLVER INTERFACE
AMCI ADVANCED MICRO CONTROLS MODEL NO: 7751 ENCODER LDT INTERFACE
AMCI, for Allen Bradley, PLC-5, Resolver Interface, 1761-21, New in Box, NIB
AMCI 8513 EASYPack Packaging Control PLC Module Allen-Bradley SLC500 UPS RED
AMCI 1742 Encoder PLC Series Intelligent Resolver Interface Module
ALLEN BRADLEY AMCI 4500 SLC 500 MODULE AMCI 4501 M4501 REV A
AMCI 1731-03 ENCODER MODULE CARD
AMCI 7751 PLC CONTROLLER ENCODER MODULE CARD - - FREE SHIPPING
AMCI ADVANCED MICRO CONTROLS 7751 ENCODER MODULE - - FREE SHIPPING
AMCI ADVANCED MOTION CONTROLS PLC SERIES ENCODER MODULE 1731
AMCI SD17060 STEPPER DRIVE ADVANCED MICRO CONTROLS INC 1 PH 120VAC Output 170VDC
AMCI SM34-600 Stepper Motor 200 steps rev stepper motor
AMCI iPCE-1-3/D Advanced Micro Controls Encoder 115 VAC
Advanced Micro Controls Inc. AMCI 8523 | EASYPack Interface Module
1401862Q AMCI Advanced Micro Controls Resolver Interface 140 1862Q
1401834Q AMCI Advanced Micro Controls Resolver Interface 140 1834Q
AMCI 7752 PLC Series Encoder -
AMCI ADVANCED MOTION CONTROLS PLC SERIES ENCODER MODULE 1731
AMCI 1241 1 Channel Resolver Unit
AMCI 4500, Model-4501, 4501 V.O. 78 D9 *30 Day Warranty*
AMCI 7752 ENCODER MODULE
AMCI ADVANCED MICRO CONTROLS ENCODER 1761-01
GE Fanuc AMCI, 1331 Encoder, Advanced Micro Controls,
AMCI Stepper Controller SD310601 Stepper Controller
AMCI Model RB-8 I/O RACK SYSTEM, 8 OUTPUT, 8 INPUT RELAY BOARD
Warranty AMCI ADVANCED MICRO CONTROLS STEPPER MOTOR DRIVE SD17040
AMCI ENCODER 7751 (ANA)
AMCI 1741 Encoder - Parts Only
AMCI Advanced Micro 1731H Resolver Encoder Interface
Allen bradley amci 1531 resolver interface
GE Fanuc 90 30 AMCI Encoder 1331
GE Fanuc AMCI, 1332 Encoder, Advanced Micro Controls,
New AMCI SM23-130D Stepper Motor, 200 Steps/Rev, Shaft Diameter: 1/4", NEMA 23
AMCI ADVANCED MICRO CONTROLS SD17040 1 PHASE 120VAC 50/60Hz STEPPER MOTOR DRIVE
New AMCI Advanced Micro Controls 3401 1-Axis Stepper Motor Control Controller
AMCI SD17040B 1PH 115V PLC Stepper Motor Control Controller Driver Free Shipping
AMCI SD17040B 1PH 115V PLC Stepper Motor Control Controller Driver Free Shipping
AMCI ADVANCED MICRO CONTROLS 1731 ENCODER RESOLVER (V7)
AMCI Series 6000 Remote Display 6200F 115V
NEW Advanced Micro Controls AMCI 1761-21 Resolver Interface Module Encoder 12Bit
AMCI / Advanced Micro Controls Inc. Encoder, Model 1832
AMCI 8511-07 Easy Pack Module
AMCI SM23-A112DE Advanced Micro Control Stepper Motor 200 Step/Rev SM23A112DE
AMCI PLC SERIES ENCODER MODULE 7751 *PZB*
AMCI Transducer h25 FE r3n
AMCI 1761 Encoder DUAL RESOLVER INTERFACE MODULE 20 BIT 1 CHANNEL -
AMCI Module 7500 Model 7551 *FREE SHIPPING*
AMCI,ALLEN-BRADLEY 1531 RESOLVER INTERFACE MODULE SLC 500 - NEW IN BOX -
AMCI ADVANCED MICRO CONTROLS SD17040 1 PHASE 120VAC 50/60Hz STEPPER MOTOR DRIVE
GE Fanuc AMCI, 1332 Encoder, Advanced Micro Controls,
AMCI SD17060 STEPPER DRIVE ADVANCED MICRO CONTROLS INC 1 PH 120VAC Output 170VDC
Stem Cinelli "Dynamo" Bicycle-Colour: White/Black - 90mm
AMCI 1531 Resolver Interface Module SLC500 1746
GE Fanuc AMCI,Advanced Micro Controls, IC693MDL753G, 12/24vdc, 32pt Output
AMCI SD3520 STEPPER DRIVE
AMCI Resolver Moudle 1531
RED LION MCI2Y01A DIGITAL METER **
AMCI Advanced Micro Control Inc. 1931 Intelligent Resolver Interface Module New
ADVANCED MICRO CONTROLS AMCI H4T-20L TRANSDUCER
AMCI ADVANCED MICRO CONTROLS 1731 ENCODER RESOLVER
Advanced Motion Controls Stepper Driver AMCI SD17063
AMCI 7551 Interface Module (10 available)
AMCi / Siemens Model: 1144 Product: Controller Sinec Symadyn D PLC Simatic S5
AMCI 6000 Series Remote LED Display 6101F Advanced Micro Controls Inc.115 VAC
Jeep Cherokee XJ 1985-1995 1995-2001 AMCI6 4.0L NEW SNORKEL WORLDWIDE SHIPPING
8523 AMCI Advanced Micro Controls Inc EasyPack interface module( and Tested)
Integrated Stepper Motor Controller + Drive Networked I/O AMCI ANG1 AnyNET I/O
AMCI 1761 ENCODER MODULE GOOD TAKEOUT
AMCI M9017 REV. B RB-8 RELAY I/O BOARD
ADVANCED MICRO CONTROLS 2742 CONTROLLER PLC-5 AMCI 2742 (B03)
ADVANCED MICRO CONTROLS INC ENCODER AMCI MODEL 1833
AMCI SD17063 STEPPER DRIVE 170vDC 700W
AMCI ADVANCED MICRO CONTROLS INC RS1 REV A BOARD
AMCI 1531 Resolver Interface Module SLC500 Allen Bradley
AMCI 1531 Resolver Interface Module
2742 AMCI Advanced Micro Controls - 60 day warranty
AMCI CRP-6 6 ft Cable - connects AMCI Controller Module to RB-(X) I/O System
YORK CIRCUIT BOARD 00054622692 HSS-CDC AMCI 1531 516057 501773 CNC
AMCI 1531Resolver Interface Module, SLC500
SNORKEL KIT FITS JEEP TJ WRANGLER 10/1999 - 10/2006 4.0 PETROL AMCI6 RHS 4X4
NEW ADVANCED MICRO CONTROLS AMCI RM-1 REFERENCE MODULE RM1
AMCI ADVANCED MICRO CONTROLS ENCODER 1341 Single Channel Interface Module
AMCI A34780 CR-9935 Resolver Transducer Assembly 7-Pin 3/4" Shaft Dia
AMCI SD3520 Stepper Driver
New AMCI SM17-A44 Size 17 Stepper Motor 4VDC 1.2A/Phase 3.3OHM
AMCI ADVANCED MICRO CONTROLS ENCODER 1331 Single Channel Interface Module
AMCI Jeep Renault Genuine Replacement Part 3721151
(4) FACTORY SEALED! AMCI GROUNDING CLAMPS GC-1 GC1
AMCI Model No. 1531
AMCI RM-1 RM1 75375 REFERENCE MODULE
AMCI 3204 4CH Stepper Controller Front Plate
AMCi GC-1 GROUNDING CLAMP
AMCI M9017 REV. B RB-8. RB-8 Industrial automation breakout board
资讯来源:漳州鼎晟达自动化设备有限公司
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