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描述

BMXDDO1602

綜合抗干擾設(shè)計(jì)。主要考慮來(lái)自系統(tǒng)外部的幾種抑制措施,內(nèi)容包括:對(duì)PLC系統(tǒng)及外引線進(jìn)行屏蔽以防空間輻射電磁干擾;對(duì)外引線進(jìn)行隔離、濾波,特別是動(dòng)力電纜應(yīng)分層布置,以防通過(guò)外引線引入傳導(dǎo)電磁干擾;正確設(shè)計(jì)接地點(diǎn)和接地裝置,完善接地系統(tǒng)。另外還必須利用軟件手段,進(jìn)一步提高系統(tǒng)的安全可靠性。
? ? 采用性能優(yōu)良的電源,抑制電網(wǎng)引入的干擾。
? ? 在PLC控制系統(tǒng)中,電源占有極重要的地位。電網(wǎng)干擾串入PLC控制系統(tǒng)主要通過(guò)PLC系統(tǒng)的供電電源(如CPU電源、I/O電源等)、變送器供電電源和與PLC系統(tǒng)具有直接電氣連接的儀表供電電源等耦合進(jìn)入的。現(xiàn)在對(duì)于PLC系統(tǒng)供電的電源,一般都采用隔離性能較好的電源,而對(duì)于變送器供電電源以及和PLC系統(tǒng)有直接電氣連接的儀表供電電源,并沒(méi)受到足夠的重視。雖然采取了一定的隔離措施,但普遍還不夠,主要是使用的隔離變壓器分布參數(shù)大,抑制干擾能力差,經(jīng)電源耦合而串入共模干擾、差模干擾。所以對(duì)于變送器和共用信號(hào)儀表供電應(yīng)選擇分布電容小、抑制帶大(如采用多次隔離和屏蔽及漏感技術(shù))的配電器,以減少PLC系統(tǒng)的干擾。
? ? 此外,為保證電網(wǎng)饋電不中斷,可采用在線式不間斷供電電源(UPS)供電,提高供電的安全可靠性。而且UPS還具有較強(qiáng)的干擾隔離性能,是一種PLC控制系統(tǒng)的理想電源。
? ? 正確選擇電纜的和實(shí)施敷設(shè)。
? ? 為了減少動(dòng)力電纜尤其是變頻裝置饋電電纜的輻射電磁干擾,筆者在某工程中采用了銅帶鎧裝屏蔽電力電纜,降低了動(dòng)力線產(chǎn)生的電磁干擾,該工程投產(chǎn)后取得了滿意的效果。
? ? 不同類型的信號(hào)分別由不同電纜傳輸,信號(hào)電纜應(yīng)按傳輸信號(hào)種類分層敷設(shè),嚴(yán)禁用同一電纜的不同導(dǎo)線同時(shí)傳送動(dòng)力電源和信號(hào),避免信號(hào)線與動(dòng)力電纜靠近平行敷設(shè),以減少電磁干擾。
? ? 硬件濾波及軟件抗干擾措施。
? ? 信號(hào)在接入計(jì)算機(jī)前,在信號(hào)線與地間并接電容,以減少共模干擾;在信號(hào)兩極間加裝濾波器可減少差模干擾。
? ? 由于電磁干擾的復(fù)雜性,要根本消除干擾影響是不可能的,因此在PLC控制系統(tǒng)的軟件設(shè)計(jì)和組態(tài)時(shí),還應(yīng)在軟件方面進(jìn)行抗干擾處理,進(jìn)一步提高系統(tǒng)的可靠性。常用的一些提高軟件結(jié)構(gòu)可靠性的措施包括:數(shù)字濾波和工頻整形采樣,可有效消除周期性干擾;定時(shí)校正參考點(diǎn)電位,并采用動(dòng)態(tài)零點(diǎn),可防止電位漂移;采用信息冗余技術(shù),設(shè)計(jì)相應(yīng)的軟件標(biāo)志位;采用間接跳轉(zhuǎn),設(shè)置軟件保護(hù)等。
? ? 正確選擇接地點(diǎn),完善接地系統(tǒng)。
? ? 接地的目的通常有兩個(gè),一為了安全,二是為了抑制干擾。完善的接地系統(tǒng)是PLC控制系統(tǒng)抗電磁干擾的重要措施之一。
? ? 系統(tǒng)接地有浮地、直接接地和電容接地三種方式。對(duì)PLC控制系統(tǒng)而言,它屬高速低電平控制裝置,應(yīng)采用直接接地方式。由于信號(hào)電纜分布電容和輸入裝置濾波等的影響,裝置之間的信號(hào)交換頻率一般都低于1MHz,所以PLC控制系統(tǒng)接地線采用一點(diǎn)接地和串聯(lián)一點(diǎn)接地方式。集中布置的PLC系統(tǒng)適于并聯(lián)一點(diǎn)接地方式,各裝置的柜體中心接地點(diǎn)以單獨(dú)的接地線引向接地極。如果裝置間距較大,應(yīng)采用串聯(lián)一點(diǎn)接地方式,用一根大截面銅母線(或絕緣電纜)連接各裝置的柜體中心接地點(diǎn),然后將接地母線直接連接接地極。接地線采用截面大于22mm2的銅導(dǎo)線,總母線使用截面大于60mm2的銅排。接地極的接地電阻小于2Ω,接地極最好埋在距建筑物10~15m遠(yuǎn)處,而且PLC系統(tǒng)接地點(diǎn)必須與強(qiáng)電設(shè)備接地點(diǎn)相距10m以上。
? ? 信號(hào)源接地時(shí),屏蔽層應(yīng)在信號(hào)側(cè)接地;不接地時(shí),應(yīng)在PLC側(cè)接地;信號(hào)線中間有接頭時(shí),屏蔽層應(yīng)牢固連接并進(jìn)行絕緣處理,一定要避免多點(diǎn)接地。多個(gè)測(cè)點(diǎn)信號(hào)的屏蔽雙絞線與多芯對(duì)絞總屏蔽電纜連接時(shí),各屏蔽層應(yīng)相互連接好,并經(jīng)絕緣處理,選擇適當(dāng)?shù)慕拥靥巻吸c(diǎn)接地。
? ? PLC控制系統(tǒng)的干擾是一個(gè)十分復(fù)雜的問(wèn)題,因此在抗干擾設(shè)計(jì)中應(yīng)綜合考慮各方面的因素,合理有效地抑制干擾,對(duì)有些干擾情況還需做具體分析,采取對(duì)癥下藥的方法,才能夠使PLC控制系統(tǒng)正常工作,保證工業(yè)設(shè)備安全高效運(yùn)行。
? ? PLC控制系統(tǒng)的抗干擾是一個(gè)系統(tǒng)工程,要求制造單位設(shè)計(jì)生產(chǎn)出具有較強(qiáng)抗干擾能力的產(chǎn)品,且有賴于使用部門在工程設(shè)計(jì)、安裝施工和運(yùn)行維護(hù)中予以全面考慮,并結(jié)合具體情況進(jìn)行綜合設(shè)計(jì),才能保證系統(tǒng)的電磁兼容性和運(yùn)行可靠性。進(jìn)行具體工程的抗干擾設(shè)計(jì)時(shí),應(yīng)主要注意以下兩個(gè)方面。
? ? 在選擇設(shè)備時(shí),首先要選擇有較高抗干擾能力的產(chǎn)品,其包括了電磁兼容性,尤其是抗外部干擾能力,如采用浮地技術(shù)、隔離性能好的PLC系統(tǒng);其次還應(yīng)了解生產(chǎn)廠家給出的抗干擾指標(biāo),如共模抑制比、差模抑制比、耐壓能力、允許在多大電場(chǎng)強(qiáng)度和多高頻率的磁場(chǎng)強(qiáng)度環(huán)境中工作等;另外是靠考查其在類似工作中的應(yīng)用實(shí)績(jī)。
? ? 在選擇國(guó)外進(jìn)口產(chǎn)品要注意,我國(guó)是采用220V高內(nèi)阻電網(wǎng)制式,而歐美地區(qū)是110V低內(nèi)阻電網(wǎng)。由于我國(guó)電網(wǎng)內(nèi)阻大,零點(diǎn)電位漂移大,地電位變化大,工業(yè)企業(yè)現(xiàn)場(chǎng)的電磁干擾至少要比歐美地區(qū)高4倍以上,對(duì)系統(tǒng)抗干擾性能要求更高。在國(guó)外能正常工作的PLC產(chǎn)品在國(guó)內(nèi)工業(yè)就不一定能可靠運(yùn)行,這就要在采用國(guó)外產(chǎn)品時(shí),按我國(guó)的標(biāo)準(zhǔn)(GB/T13926)合理選擇。

MOELLER ELECTRIC NZM12-800/ZM12-?800-C USPP NZM12800ZM12

KLOCKNER-MOELLE?R NZM 12-800-NA CIRCUIT BREAKER **XLNT**

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Klockner-Moelle?r NZM12-1250 with Trip ZM12-1200 A Amp

Klockner-Moelle?r NZM12-800 with Trip ZM12a-70-NA Amp

Bosch Servomodul SM 17/35-TA

Siemens Simodrive 650 / 690 Leistungsteil 6SC6502-0AF01

Siemens Simodrive 610 AC-VSA FBG Regelung 6SC6100-0NA11

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Okaya Ersatzdisplay für Siemens Sinumerik System 8

INDRAMAT VERSORGUNGSMODU?L TVD 1.2-15-03

INDRAMAT SERVOANTRIEBSMO?DUL TDM 1.2-100-300-W1

INDRAMAT LINE FORMER NAM 1.2-08

INDRAMAT DIGITALER ANTRIEBSREGLER HDS 03.2-W100N-HS12?-0

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REPARATUR SIEMENS REGELUNGSEINSCH?UB 6SN1121-0DA11-0?AA0

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REPARATUR SIEMENS SIMODRIVE 650 6SC6508-4AA02

REPARATUR BOSCH VERSORGUNGSMODU?L VM60/R-T

REPARATUR SIEMENS 690 AC-HSA/VSA 6SC6901-0VR07

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Reparatur Indramat Umrichter RAC 3.5-200-460-L00?-W1-220

Reparatur SIEMENS Simodrive 650 TransistorPulsu?mrichter

Reparatur Siemens Simodrive 690 Komplettantrieb

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Compumotor S6-DRIVE Microstep Stepper Drive *GOOD PULL*

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CNC SERVO or STEPPER MOTOR DRIVE PULLEY 40T 3/8″ .2p AL

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Cnc 4.2A Bipolar 2ph hybrid Micro stepper motor drive

Cnc 5.8A 3 phase micro stepper drive step Motor driver

CNC VEXTA NEMA34 AC Servo motor & drive Replace stepper

Lot New Automation Direct Stepper Motor Drive And Motor
Includes: STP-DRV-4035 & STP-MTR-23055 & STP-PWR-3204

Servo Stepper Motor Gear Reduction Drive 25:1 Ratio++++

Stepper Motor Drive Unit SDU Model SM9306 McMennan UK

SAA1027 PHILIPS Stepper Motor Drive Circuit IC

100x SAA1027 PHILIPS Stepper Motor Drive Circuit IC

PARKER CPCD 30/1 MPC II STEPPER MOTOR DRIVE A120380

Cnc stepper Servo Step Motor Drive Power Supply 36v 10A

Cnc 5.6 A Bipolar 2ph hybrid Micro stepper motor drive

Cnc 4A 2 phase hybrid Step motor drive stepper driver

Leadshine DM432C Digital Stepper Motor Drive 40VDC/3.2A

Parker Compumotor M-Series Stepper Motor Drive M83-93

Compumotor M-Series Stepper Motor Drive M578311 Rebuilt

Parker Compumotor AL-Drive Stepping Stepper Motor

CNC SERVO or STEPPER MOTOR DRIVE PULLEY 15T 5/16 Pit AL

CNC stepper motor DRIVE COUPLING HALF lovejoy 6mm bore

CNC stepper motor DRIVE COUPLING HALF lovejoy 8mm bore

CNC stepper motor DRIVE COUPLING HALF lovejoy 14mm bore

CNC SERVO STEPPER MOTOR DRIVE PULLEY 15T 3/8″ Bore Alum

CNC Geckodrive G251 Stepper Motor Drive WITH EXTRAS

LOT DCI LINEAR STAGE / STEPPER MOTOR / COMPUMOTOR DRIVE

LAM ENCODER ASSEMBLY, MOTOR STEPPER ARM DRIVE

Leadshine DM422 Digital Stepper Motor Drive 40VDC/2.2A

Leadshine DM442 Digital Stepper Motor Drive 40VDC/4.2A

Pacific Scientific Sigma Danaher Motor Stepper Drive

Compumotor ZETA4-240 Stepper Motor Drive

Pacific Scientific 6430 Stepper Motor Drive

Cnc Servo Stepper Motor Drive Power Supply 12V-50V 720W

Cnc 5.8A 3 phase micro stepper drive step Motor driver

CNC stepper motor DRIVE COUPLING 3/8″ bores

CNC stepper motor DRIVE COUPLING HALF lovejoy 3/8″ bore

CNC LINEAR ACTUATOR 24″ SLIDE CNC STEPPER MOTOR DRIVE

CNC stepper motor DRIVE COUPLING 1/2″ bores

CNC Rotary Table with Stepper Motor drive

CNC stepper motor DRIVE COUPLING HALF lovejoy 3/8″ bor

CNC SERVO or STEPPER MOTOR DRIVE PULLEY 15T 1/4B AL

CNC SERVO STEPPER MOTOR DRIVE PULLEY 15T 1/2″ Bore Alum

CNC 5 Axis TB6560 Stepper Motor Drive+Remote Controller

ORIENTAL MOTOR UDX5114 DRIVE STEPPER 5PHASE 1.4AMP

Parker Compumotor Stepper Motor Drive M106-120 Rebuilt

Parker Compumotor Micro-Step Stepper Motor Drive M# AXL

MeiVac Vari-Q Drive Motor, Model: 150-3 Stepper Motor

A02750-1709 Mollins Dual Stepper Motor Drive OED 000207

Parker Compumotor LN Stepper Motor Drive

Parker Compumotor Microstep AX51-51 Drive

PARKER COMPUMOTOR OEM650XRC stepper motor drive

Compumotor M Series Stepper Motor Drive Control M57-102

Cnc Japan 5 Phase 110v MICRO STEP stepper Motor Drive

Cnc 8A 2 phase micro step Bi-PoLar Stepper motor drive

Cnc 4.2A Bipolar 2ph hybrid Micro stepper motor drive

Parker Compumotor Microstep Drive S Series S6

New LAM 810-17016-001 Etcher Stepper Motor Drive

New LAM 605-017016-100 PCB Stepper Motor Drive Chip

Parker Compumotor Stepper Motor w/ 3.5A Drive CP-E-AC

AX06-0151 GENUINE RICOH Aficio Stepper Motor Drive Unit

PARKER COMPUMOTOR SX SERIES MICROSTEP DRIVE SX106-178-E

PARKER SX-8 MICROSTEP DRIVE/INDEXER WITH S106-250-MO

Parker Compumotor Microstep Drive S6-Drive , S Series

Parker Compumotor Microstep Drive SX Series SX8-DRIVE

Lot 2 Sigma 20-2223D Stepper Step/Stepping DC Motor 4P

Compumotor SX8-Drive Microstep Drive

Astrosyn 14PM-M010-P2ST, 4-wire, stepper motor

Powermax II Stepper Motor P21NRXD-LNN-NS-?00 7.85V/DC

Parker Compumotor SX6-Drive Microstep Drive SX Series

C/P SWOOSH 60m Stepper Motor FUEL PRESS Kg/Cm2 Gauge W

C/P SWOOSH 60mm JDM Smoky Stepper Motor TACHOMETER W+ R

C/P SWOOSH 60mm Stepper Motor TURBO BOOST Gauge (Bar) R

PARKER COMPUMOTOR LX SERIES MICROSTEP DRIVE


選擇深圳長(zhǎng)欣,選擇放心,售后無(wú)憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營(yíng):本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂(lè),ACSO,力士樂(lè)等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點(diǎn)經(jīng)驗(yàn)。
1、先通讀一遍“系統(tǒng)手冊(cè)”(不管能不能看懂,先了解個(gè)大概,以便學(xué)習(xí)編程時(shí)查找);
2、由位控邏輯入手,逐漸增加定時(shí)、計(jì)數(shù)等條件,把或、與、非關(guān)系理順;
3、進(jìn)而練習(xí)整數(shù)運(yùn)算、實(shí)數(shù)運(yùn)算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個(gè)物理回路驗(yàn)證,比如變頻器+電機(jī)+測(cè)速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時(shí)也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機(jī)器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動(dòng)器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會(huì)一種至于其它的學(xué)習(xí)起來(lái)也就簡(jiǎn)單了。