A-B 1747-L524

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描述

A-B 1747-L524
台达PLC通讯程序要点
“固定时序通讯程序”是台达PLC通讯技术工程处理通讯常用方法,利用固定计时的方法来实现分时通讯,这样的写法比较容易造成通讯时序上的问题。Modbus通讯规格是采用主/从模式,也就是主站发通讯命令给从站,从站收到之后再回应主站,这一收一回才算完成一个完整的通讯资料交换,该程序有使用到M1127来判断,但是决定下一个通讯指令是否运行的接点开关却不是由通讯旗标来决定,而是由100ms的timer来决定,这样很容易有问题生成,因为通讯的整个时间包含通讯资料在线上传输的时间加上通讯资料在主/从站处理的时间,若这时间超过100ms,那就很容易造成从站回传,而主站送资料出去,造成资料在线上碰撞,因而影响传输的正确性,如果把timer时间延长,还是会碰到有问题,因为这种写法,通讯旗标的动作与决定传送的旗标本身并未同步,因而会有时间差,造成资料不正确。该程序在EH机型上测试,发现通讯速度比较慢,且读回来的数据有时会发生交叉的现象,即从站2的频率读到从站4的寄存器上,错误读写的情况可见图一。使用这种编程方法在通讯正常时没有问题,一旦当通讯数据错乱时,就会造成数据传送错误,严重时甚至导致PLC死机,
“通讯旗标方式程序”是调整后的程序,可以比较一下,其主要区别在于ModbusRead/Write指令在程序使用上搭配M1127,M1129,M1140,M1141来判断,由这几个旗标的状态来决定下一个通讯指令的运行时间,能够很好的处理串行通讯的时序问题,保证通讯的可靠及效率,正常通讯监控画面如图二。在用固定时序通讯中,即使通讯正常完成,那末也要等到100MS以后做下一个通讯,比如写指令通讯完成耗时20MS,则需要等待80MS,降低了通讯效率,而采用通讯旗标会在通讯完成或出现错误的情况下转入执行下一个通讯指令,有效利用了时间。

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主营DCS系统配件
机器人系统配件
大型伺服系统配件
品牌:ABB   ,AB  ,GE,FOXBORO,本特利,英维思,伍德沃德,西屋,瑞恩,施耐德,西门子,摩托罗拉,安川。力士乐。ACSO,横河等进口品牌。 专业销售进口DCS  PLC系统备件模块
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  专业销售进口DCS  PLC系统备件模块 15天包退换 一年质保 大量现货  国内实力库存商家

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ARCNET ANET Compex A/Net-1 8-bit ISA PC/ XT/AT

Sigma MM120 Multimode 120 ISA Video Card ET4000

Intel AA 541287-205 Motherboard 5 ISA Socket5 430NX

Worlds Fastest 286 Motherboard 20MHz BabyAT AT M209 287

360K 400K Floppy Drive Sony OA-D31V-14 HH 3.5 in

Amstrad PCW8256 PCW Z80 CF2 CP104 Z70291 MC0031B 1985

Floppy Drive Sony MFD-17W-1N 9110 3.5in

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Amstrad PCW EME-232 CF-2 Floppy Drive PCW9512 Z80265

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Intellicon D-Flex ISA RS-485 RS-422 RS485 Dual Serial

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Hard Drive IDE WD100 WD100EB-00BHF0 10GB 16JAN2001

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Hard Drive SCSI Quantum Atlas IV 9.1L KN09L011 01-G S0B

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Automed AR I/O Board 222101 8-bit ISA IBM PC/XT/AT 1993

Interphase SlotOptimizer 554E PCI Quad 10/100 Ethernet

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Apple II IIe ADALAB ADA-LAB DAQ Data Acquisition Card

I-Bus Tigershark 105-00596-00 Socket7 SBC Motherboard

Bitfield OY Video Conferencing ISA Card H.26 LR9H269401

Calcomp TechJet 5500 – Power Supply QH3-3232 SHIHEN

HD SCSI Quantum 1280S FB12S012 Rev 01-A 1280 Q Apple

Criterion ALG2201.OF ISA VGA SVGA Video Card V24GA 1MB

Panasonic Matshita LF-7300 1.4GB Optical WORM Drive PCR

Texas Instruments TI XDS560 Emulator PCI Interface Card

Sciemetric PCI Interface Card Model 808 w Data Engine

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Network Card 03-0033-D00 3031 8-bit ISA PC/ XT 18.867

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Equinox Megaport 8CS 910168/A 8-port Serial ISA Card RJ

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Lucent T8100 CPCI Eval Board RevB Ambassador M-T-8105

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Teknor TEK-CPCI 1003 SBC Pentium

486 Motherboard MiniEISA-486AS EISA DX4-100 32 MB 256K

07L9196 IBM Dual CPU Card 35L0817 Gemini DD5.0

09P1162 18P1471 18P1470 34L9618 SM390HGSFN30G20 IBM

ASUS P/I-P6NP5 Pentium Pro MediaBus Motherboard Rev1.41

ASUS P/I-P6NP5 Pentium Pro MediaBus Motherboard Rev1.3

Octal II Card SULCUS Squirrel POS D71051C 8-Port Serial

DigiChannel Connection Box PC/16i MC/16i 16 DB25

Motherboard Super Socket7 ASUS * P5A-B * 1.03/500/sound

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8-bit Video Card Orchid Designer D-VGA IBM PC/XT ET3000

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ATI Rage128 PCI Card 109-57400-00 600-7055-A 820-1012-A

MCA Adapter Card Intervoice Fonetower 250046-E 100090

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M701 Pentium Pro Motherboard 4 ISA 4 PCI Intel 440BX BX

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SCSI Hard Disk Quantum ProDrive 105S 910-10-9403 50pin

SCSI Hard Disk 50-pin Quantum ProDrive 1080S

SCSI Hard Disk Seagate Hawk ST12400N 949001-026 Q-01-94

Wangtek 6130FS SCSI DAT Tape Drive

Informtech 486 Motherboard VLB Socket3 IT486SMVG DX4

SCSI Hard Disk Quantum XP334300W AT43W011-05-G RevF

Magicard Controller ISA Card Ocean Systems 3461-2002-00

ProTech 4066A PCI 8-port Serial Card RS-232 PCI8S650

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Wicat 150WS Graphics Video Card 1982 Intel D8275

Wicat 150WS 1982 Z80 MultiBUS 6522 S150 I/O Controller

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Canon Canonical H04524-002 030-0980-002 Network Card

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Hard Drive Quantum Q250 SCSI Apple 40MB 50-pin 76-45004

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Hard Drive Western Digital Caviar 2850 99-004178-014 WD

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Epox EP-5BVPXB Socket7 Motherboard ISA Rev 1.3 Via VPX

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KM-S4-1 486 Motherboard Small Tiny PCI Jamicon U6923 MB

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HP Tape drive 20/40 Gb DAT 40×6 C5717C Autoloader DDS4

Intellistation Motherboard 01K4345 713527-601 28L497

IBM 59P5191 Barnacle GA1 Quad Xeon Planar Motherboard

Hard Drive SCSI Quantum Lightning LT54S011 04-H 540S

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Hard Drive SCSI Conner Peripherals CP3040A YRL02 40SC

Hard Drive SCSI Disk IBM DNES-309170 E182115 S 25L1910

Hard Drive SCSI Disk Seagate Hawk ST31230N 9B1003-067

Hard Drive SCSI Seagate Barracuda ST34572N 9J6001-010

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Hard Drive SCSI Seagate Cheetah ST318452LW 9T4005-001

P4 Motherboard ASUS P4XP-X v1.02 CPU 2.4GHz 512MB

Motherboard Athlon K7S5A Pro v5.0 XP2000+ Socket462

Motherboard P4 P4S533-MX-UAYZ v2.00 Socket478 PSMX2

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Motherboard Athlon Skt 754 ASUS K8V-MX 3.01G KBV 2800

MCA Adapter Card Control Systems Inc Artist 10 MC Video

MCA Adapter Card PS/2 Memory Expansion 8MB Edsun EL2010

Motherboard DEC Digital Alpha 54-20674-04 NF03604C 96MB

Hard Drive SCSI Seagate ST336607LC Sun 540-5936-01 36GB

Biologic 560-32CHAA 560-32ADPC Vintage A/D D/A ISA Card

Racal Interlan NI5210-10BT 625-1121-00 Ethernet Card

Motherboard Pentium Pine Technology ZA3 i440ZX TL-IZX3

Motherboard Pentium ASUS P/I-P55T2P4 Rev.2.3. 133MHz

Pentium Motherboard Socket7 FIC VA-502 V1.1 VIA 233MHz

Hard Drive SCSI Seagate Barracuda ST39173N 9J4006-010

Hard Drive SCSI Quantum Lightning LT73S011 730S 04-H

Hard Drive SCSI IBM PN33F8453 071590 843852 93X2488

Hard Drive SCSI Conner Peripherals CP-3181 AC28112 9029

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Hard Drive SCSI Disk Quantum Atlas IV KN09L011 9.1L

Hard Drive SCSI Western Digital Enterprise WDE9100

Hard Drive SCSI Disk Quantum ProDrive 210S 3701376-02

Hard Drive SCSI Disk Quantum 1225S EN12S011-03-D

Hard Drive SCSI IBM PN73F9001 050491 894712 73F9006 EC

Hard Drive SCSI Disk Rodime RO652 02B 62171000 50240

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Hard Drive SCSI Quantum LPS 240S GM24S027 01-D Eprom

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Hard Drive SCSI Seagate Cheetah ST136403LW 9L7005-001

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Hard Drive SCSI Rodime RO3259T E1 S36423862 12007730

Hard Drive SCSI Disk MiniScribe 8425S C493571 G03-88

Hard Drive SCSI Hewlett Packard DPSS-318350 07N5277 HP

Hard Drive SCSI Seagate Cheetah ST336706LC 9T9001-001

Hard Drive SCSI IBM Ultrastar IC35L009VWD210-​0 07N6360

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Hard Drive SCSI Barracuda 997001-020 ST12550N 70767352

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Hard Drive SCSI Seagate ST1181677LWV 9R9008-001 N176

Hard Drive SCSI Seagate ST1181677LWV 9R9008-001 MIC

Hard Drive SCSI Fujitsu Limited MAF3364LP CA01776-B950

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Hard Drive SCSI Disk Seagate Hawk ST32430N 9B1001-026

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Hard Drive SCSI Maxtor D740X-6L MX6L080J4 24P3665 80 GB

Hard Drive SCSI Quantum VP32210 CL22S011-06-J-J APS

Hard Drive SCSI Disk Quantum LPS GM24S027 240S 01-D

Hard Drive SCSI Disk Quantum LPS 800-09-94 84S 1359

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Hard Drive IDE Disk Samsung WU32165A J38J741019L W521

Hard Drive IDE Disk Western Digital WD1000BB-00CAA1

Hard Drive SCSI Disk Seagate Hawk ST15230N 9B2001-026

Hard Drive SCSI Disk Conner CP3040A E938R3 STL02 40SC

Hard Drive SCSI Quantum ProDrive ELS PI16S011 08-M 170S

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PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗

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选择深圳长欣,选择放心,售后无忧大量现货,当天顺丰发货!
主营:本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”(不管能不能看懂,先了解个大概,以便学习编程时查找);
2、由位控逻辑入手,逐渐增加定时、计数等条件,把或、与、非关系理顺;
3、进而练习整数运算、实数运算、类型转换;
4、量程转换、PID调节回路的建立及P、I、D参数的理解(最好是有个物理回路验证,比如变频器+电机+测速传感器);
5、循环、顺序、跳转等程序控制(尽量避免跳转,非跳不可时也是跳的越近越好);
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列,GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌,由于PLC的基本框架大同小异,学会一种至于其它的学习起来也就简单了。