隨著可編程控制器的發(fā)展,其編程軟件呈現(xiàn)多樣化和化發(fā)展趨勢(shì)。由于可編程控制器類型較多,各個(gè)不同機(jī)型對(duì)應(yīng)編程軟件也是有一定的差別,特別是各個(gè)生產(chǎn)廠家的可編程控制器之間,它們的編程軟件不能通用,但是同一生產(chǎn)廠家生產(chǎn)的可編程控制器一般都可以使用。這一點(diǎn)請(qǐng)讀者注意的。
二、編程軟件編程語言表達(dá)方式
可編程控制器與一般的計(jì)算機(jī)相類似,在軟件方面有系統(tǒng)軟件和應(yīng)用軟件之分,只是可編程控制器的系統(tǒng)軟件由可編程控制器生產(chǎn)廠家固化在 ROM 中,一般的用戶只能在應(yīng)用軟件上進(jìn)行操作,即通過編程軟件來編制用戶程序。編程軟件是由可編程控制器生產(chǎn)廠家提供的編程語言,至今為止還沒有一種能適合各種可編程控制器的通用的編程語言,但是各個(gè)可編程控制器發(fā)展過程有類似之處,可編程控制器的編程語言即編程工具都大體差不多,一般有如下五種表達(dá)方式。
( 一 ) 梯形圖( Ladder Diagram )MEASUREX 05348100
梯形圖是一種以圖形符號(hào)及圖形符號(hào)在圖中的相互關(guān)系表示控制關(guān)系的編程語言,它是從繼電器控制電路圖演變過來的。梯形圖將繼電器控制電路圖進(jìn)行簡(jiǎn)化,同時(shí)加進(jìn)了許多功能強(qiáng)大、使用靈活的指令,將微機(jī)的特點(diǎn)結(jié)合進(jìn)去,使編程更加容易,而實(shí)現(xiàn)的功能卻大大超過傳統(tǒng)繼電器控制電路圖,是目前*普通的一種可編程控制器編程語言。
化整為零、順藤摸瓜、先主后輔、集零為整、安全保護(hù)、全面檢查。
采用化整為零的原則以某一電動(dòng)機(jī)或電器元件(如接觸器或繼電器線圈)為對(duì)象,從電源開始,自上而下,自左而右,逐一分析其接通斷開關(guān)系。
2.分析方法與步驟
①分析主電路
無論線路設(shè)計(jì)還是線路分析都是先從主電路入手。主電路的作用是保證機(jī)床拖動(dòng)要求的實(shí)現(xiàn)。從主電路的構(gòu)成可分析出電動(dòng)機(jī)或執(zhí)行電器的類型、工作方式,起動(dòng)、轉(zhuǎn)向、調(diào)速、制動(dòng)等控制要求與保護(hù)要求等內(nèi)容。
②分析控制電路
主電路各控制要求是由控制電路來實(shí)現(xiàn)的,運(yùn)用“化整為零”、“順藤摸瓜”的原則,將控制電路按功能劃分為若干個(gè)局部控制線路,從電源和主令信號(hào)開始,經(jīng)過邏輯判斷,寫出控制流程,以簡(jiǎn)便明了的方式表達(dá)出電路的自動(dòng)工作過程。
MEASUREX 05348100
FOXBORO RDM10-PFDZ TRANSMITTER SUPPLY 24VDC 4MA USED
FOXBORO 13A STAINLESS 0-65IN-H2O DIFFERENTIAL PRESSURE TRANSMITTER B388978
LOT 4 FOXBORO ASSORTED P0700FW P0700FV REV B TOP/BOTTOM FAN ASSEMBLY B237415
Foxboro Nodebus A Extension Cable P0912CD 3 FT
Foxboro Nodebus A Extension Cable P0912CE 3 FT
Foxboro Nodebus A Extension Cable P0912CG 12 FT
NEW FOXBORO 2AP-90 SIGNAL PROCESSING MODULE CARD HOLDER B388945
NEW FOXBORO B6301FA RUBBER DIAPHRAGM ACTUATOR REPLACEMENT PART D239985
Foxboro Recording Chart 878446, Box of 100, Lot of 3
FOXBORO MOD RDM10-PFDZ TRANSMITTER SUPPLY 24VDC 4MA NEW
FOXBORO IGP20-D22CO1F-L1C1K1VT TRANSMITTER SUPPLY 12.5-42.0 VDC USED
FOXBORO RDM10-PFDZ REF: 06410295 TRANSMITTER NEW OLD STOCK
FOXBORO IDP10-D22B01F-M1L1C1 TRANSMITTER SUPPLY 12.5-42.0VDC USED
FOXBORO RDM10-PFDZ REF: 06410287 TRANSMITTER NEW OLD STOCK
FOXBORO IMV30-D22BD01F-M2C1L1VT TRANSMITTER SUPPLY 12.5--42.0VDC USED
FOXBORO 1DP10-D22A01F-L1CK1VT TRANSMITTER USED
FOXBORO RDM10-PFDZ REF: 06410290 TRANSMITTER NEW OLD STOCK
FOXBORO RDM10-PFDZ REF: 0610278 TRANSMITTER NEW OLD STOCK
FOXBORO RDM10-PFDZ SUPPLY 24VDC 4MA TRANSMITTER USED
FOXBORO RTT20-D1SNKFD-C1L3M2 SUPPLY12-42VDC TEMPERATURE TRANSMITTER USED
FOXBORO 1MV30-D22BDO1F-M2C1L1VT TRANSMITTER USED
FOXBORO IDP10-D22A01F-L1C1K1VT TRANSMITTER SUPPLY 12.5-42.0VDC USED
FOXBORO I/A SER. MAGNETIC FLOW TRANSMITTER IMT25-PEATB10N-AB USED
FOXBORO CM400YL REV.0A I/A SERIES I/O FIELDBUS MODULE USED
FOXBORO 1MV30-D22BD01F-M2C1L1VT TRANSMITTER USED
FOXBORO RDM10-PFDZ REF: 06410294 TRANSMITTER NEW OLD STOCK
FOXBORO 1GP20-D22D01F-M21C1K1VT ORIGIN: 2A0635 TRANSMITTER USED
LOT 4 FOXBORO MIXED P0903YQ P0903YS TOP/BOTTOM ENTRY BLOWER FAN ASSEMBLY B242589
FOXBORO DIFFERENTIAL PRESSURE TRANSMITTER 13FA-MS31A5
LOT 5 FOXBORO PB-CA/CC BELLOWS PRESSURE ELEMENT FOR INDICATION 3-15PSIG B242636
FOXBORO 827DF/FS1NHKA1-C ELECTRONIC TRANSMITTER FIELD TERMINAL, 12.5-65 VDC,USED
FOXBORO 823EP-IM3SC4KD-MA ELECTRONIC TRANSMITTER, 4-20 MA, 12.5-65 VDC, USED
FOXBORO M-411836E BO123HD PNEUMATIC VALVE PRESSURE REGULATOR POSITIONER B244645
FOXBORO 13A STAINLESS CAPSULE PRESSURE 0-100IN H2O TRANSMITTER B244683
FOXBORO E96P-IA-B 1000OHMS MAGNETIC 120V-AC FLOW TRANSMITTER B466513
FOXBORO E83-W04HHH1-A FLOWMETER
Lot of 9 Racing Programs, 1975-1979, 8 Foxboro, & 1 Lincoln Greyhound Park Horse
NEW FOXBORO P103RE M/40 DUAL 0-22PSI 1 IN 1/8 IN NPT PRESSURE GAUGE B408728
NEW FOXBORO E44P ELECTRONIC TRANSMITTER E44BP-F1-CS-E/FN-A
Noritake Foxboro Footed Cup & Saucer Set, Cobalt blue w/ gilded rim
Foxboro Electric Conductivity Transmitter 870EC-LB13A
Foxboro Electric Conductivity Transmitter 870EC-LB12A
NEW Foxboro Motor Chart Drive 24 VDC 122-FE Recorder M132LY GO1O8HT NEW
NEW FOXBORO E69R CURRENT TO AIR CONVERTER E69R-I2 IP CONVERTER 3-15 PSI
Foxboro 30 PSI 6-1/2" Panel Mount Gauge NEW
NEW FOXBORO P0972DX C, CP60 FIELDBUS TERMINATION CABLE
NEW Foxboro Plate Base Cover Pneumatic Transmitter 13FA D/P D0129GR NEW Parts
Foxboro 2AKQ-14 Data Transmission Cable 2AKQ-14
FOXBORO CONDUCTIVITY & RESISIVITY CONTROLLER UNIT 120 VAC 875CRA1FA
NEW FOXBORO MODEL C0134BX CONTROL UNIT
Foxboro ICT Pressure Sensor 1234-L671-10A-4 0-150 PSIA in 5 Vdc out 0-100 mv
Foxboro ICT Pressure Sensor 1234-L889-09A 0-100 PSIA in 5 Vdc
Foxboro Pressure Transducer 1124-023-D54-B1 0-30 PSIG in 12-30Vdc Out .5-5.5 Vdc
Foxboro Pressure Transducer 1124-02G-A54-B1 0-30 PSIG in 12.5-36Vdc Out 4-20 mA
Foxboro Pressure Transducer 1124-07A-A54-B1 0-30 PSIG in 12.5-36Vdc Out 4-20 mA
Foxboro Pressure Transducer 1124-07G-A54-B1 0-30 PSIG in 12.5-36Vdc Out 4-20 mA
Foxboro Pressure Transducer 1224-L887 0-30 PSIA in 10 Vdc Out 0-50 mV
Foxboro Fuel Flow Rate Indicator AR-204-A-40 (9423)
Foxboro Fuel Flow Rate Indicator AR-204-A-40 (9406)
(sp 30)E Foxboro 921R-A1a/EP297C Wafer Controller PCM 328 Power Relay Supply
NEW GENUINE FOXBORO ELECTROMAGNETIC SIGNAL CONVERTER N0138KS, NEW MINT
Foxboro 14A Flow Integrator NEW
NEW FOXBORO ICT SENSOR FOXBORO 1124-17S-A54-A 0-3000 PSIS 4-20MA
Foxboro 2AX+BB3 Battery Backup C0153SC Back-Up On-Off Switch Power Supply
Foxboro 16A-BD Speed Transmitter NEW
Foxboro Electronic Transmitter 821AL-1K1SL2-M (3032)
FOXBORO 920-EA1 RESISTIVITY PROBE; 10 FT
Patriots Foxboro Stadium Replica - Collectors Edition New In The Box
2 NEW Foxboro Transmitter Assembly C0140XA C0140XE
Foxboro N0230FP H Bridge Assembly New
Foxboro Chart Recorder Small Parts D0113NW D0113NW D113BW 44897 D0113NR
B0137QA F 090 Foxboro manual control
FOXBORO 2AI-A2V2 ANALOG AV CONTROLLER (NEW IN BOX)
SAMSONITE FOXBORO LAPTOP ETC. BACKPACK *NEW WITH TAGS*
Foxboro Pressure Transducer 1124-03G-A72-B1 0-15 PSIG in 12.5-36Vdc Out 4-20 mA
Foxboro P0400HH Terminal Wire Assembly
Foxboro Shelf 102-6W 6 Station Flow Reader Indicator Shelf Wow!!
FOXBORO 2AT SBU STANDBY CARD OUTPUT MODULE & CABLE-VTG NOS
The Rolling Stones Foxboro Stadium Oct 20,1997 Full Ticket
The Rolling Stones Foxboro Stadium 10/20/1997 Full Ticket
The Rolling Stones Foxboro Stadium 10/20/1997 Bridges to Babylon Full Ticket
Rolling Stones Foxboro Stadium 10/20/1997 Full Ticket
FOXBORO N126FB NSPP N126FB
P0916KF-0B Foxboro Breakout Block PO916KF-OB F90
MO-47, FOXBORO 823DP-I3S1NM2 ELECTRONIC TRANSMITTER
MO-49, FOXBORO 823DP-I3S1NM2 ELECTRONIC TRANSMITTER
MO-51, FOXBORO 823DP-I3S1NM2 ELECTRONIC TRANSMITTER
New Foxboro U0123BC U0-123-BC Signal Bellows Lot of 3
FOXBORO P0120NP NSFP P0120NP
FOXBORO P0970LW NSFP P0970LW
FOXBORO M-0-15-4 USPP M0154
Foxboro I/A Series P0400HH-M Termination Cable Assembly PLC PO400HH-M Wire
FOXBORO P0800MW NSFP P0800MW
FOXBORO 54756-T NSFP 54756T
Foxboro Electronic Transmitter / Model 823 DP-I3K1SL1
Foxboro Pneumatic Valve Block LEXG-N
NEW FOXBORO P0971YE 6FT LOCAL DNBT 10 BASE/RS423 COMBO CABLE-WIRE D268483
New ASM 02-187089D01 Assembly Power Cable CFI to Foxboro
FOXBORO AH3684 90240-1-1 TRANSMITTER REPLACEMENT PART 6-1/4IN FLANGE B219298
FOXBORO B1271MU NSPP B1271MU
FOXBORO X0101BE NSFP X0101BE
FOXBORO N0141ZT NSFP N0141ZT
FOXBORO E96S-IA MAGNETIC 120V-AC FLOW TRANSMITTER D425413
FOXBORO 53034-T NSFP 53034T
FOXBORO M0103AA USPP M0103AA
FOXBORO 53-4398 USPP 534398
FOXBORO P0500UX NSFP P0500UX
FOXBORO * CHART DRIVE 610 110V 60 CY 3W 4 PPH * M132NC 4-75
Foxboro 2AI-A2V2 Analog AV Controller
Foxboro intelligent pressure transmitter 861GM-DD1-A 0- 4-20ma 0-250psi
Foxboro IND. POWER MODULE 2 model AA16560 CM902WL
Foxboro E13DM Electronic Transmitter
Foxboro E94 Temperature Transmitter, Sensor: Platinum, Various Pressure Ranges
Foxboro Pressure Regulator B0123HE , 250 psi max
FOXBORO SEAT RING, J0129EA
FOXBORO PN143TR 0-100 PERCENT OF OUTPUT METER D394847
LOT 3 FOXBORO ASSORTED CM902WL IPM2-P0904HA I/A SERIES POWER MODULE 2 D256195
Foxboro P0400HH FBM01 Termination Cable We buy excess Foxboro hardware
Foxboro P0972BD I/A Series Assembly Termination Cable We buy excess Foxboro hardware
Foxboro P0972BE I/A Series Assembly Termination Cable We buy excess Foxboro hardware
Souvenir 5pcLot BROCKTON FOXBORO ATTLEBORO Mass Germany
Foxboro I/A Series P0903ZE Fieldbus Isolator PLC Module Rev-0G Revision OG
Foxboro P0902JR Twin Jack Assembly w/ P0912CH and P0912CJ Cables We buy excess Foxboro hardware
Foxboro P0951EQ-E SBC16-FBC10 93inch Cable P0951EQ We buy excess Foxboro hardware
Foxboro P0970WX 25FD-25MD 40FT Serial Cable We buy excess Foxboro hardware
Foxboro P0800AV 40FT RS232 Modem Cable We buy excess Foxboro hardware
FOXBORO 871PH-1X1A ST A Sensor, pH; ORP Holder
LOT 3 FOXBORO PBBABM SPIRAL PRESSURE ELEMENT INDICATING 30-80PSI 0-30PSI B201473
FOXBORO P0400VE I/A SERIES FIELDBUS ISOLATOR BOARD I/O MODULE D CONTROL B202733
FOXBORO P0400VE I/A SERIES FIELDBUS ISOLATOR I/O MODULE F CONTROL B202828
19 Foxboro / ICT Pressure Transducers 6 PIN
FOXBORO P0902DZ COMMUNICATION PROCESSOR 15 I/A SERIES PLC MEMORY REV C B217080
6X FOXBORO ASSORTED FBM 4 AI AU FBM 4/39/44 FBM 10 15 TERMINATION CABLE B204480
Invesys Foxboro Single Element MT-14UKGS-012 New
FOXBORO P0400YE CONTROL PROCESSOR I/O MODULE F2 0-20MA D277967
FOXBORO SEAT RING
FOXBORO E69F-BI2-RS CURRENT TO AIR CONVERTER 4-20MA 3-15/19-23 PSI D207770
FOXBORO P0400YE PROCESSOR I/O MODULE 0-20MA CONTROL B208759
FOXBORO PR-14UBS-003 RTD 4-3/4 IN STAINLESS TEMPERATURE PROBE B432599
FOXBORO DM400YJ-0A I/A SERIES 120VAC INPUT MODULE B212482
FOXBORO PS290AB 222F TRANSMITTER 870 REMOTE PREAMP SENSOR CONTROL #1556F
FOXBORO P0400VE FIELD ISOLATOR CONTROL I/A SERIES I/O MODULE REV E B217166
FOXBORO M40G *USED*
FOXBORO P0400VE FIELD CONTROL MODULE ISOLATOR I/O PLC REV C-2 I/A SERIES B218637
FOXBORO N0310FAG *USED*
FOXBORO P0400VE REV H FIELDBUS MODULE ISOLATOR B218935
FOXBORO B0123HF PRESSURE REGULATOR 250PSI / 0.5-60 PSI *NEW IN A BOX*
FOXBORO 872 MONITOR *USED*
FOXBORO P0902DZ I/A SERIES PROCESSOR MODULE COMMUNICATION A B219691
FOXBORO INVENSYS P0400VE FIELDBUS ISOLATOR MODULE Rev 0H We buy excess Foxboro hardware
LOT 3 FOXBORO SPIRAL PRESSURE ELEMENT INDICATING 0-50 PSI RANGE
FOXBORO BO123HE AIR PRESSURE REGULATOR 0.5-60PSI 250PSI 1/4 IN NPT D448773