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將所有與PLC相關(guān)的輸入信號(按鈕、行程開關(guān)、速度及溫度等傳感器)，輸出信號(接觸器、電磁閥、信號燈等)分別列表，并按PLC內(nèi)部接口范圍，給每個信號分配一個確定的編號。
(3)詳細(xì)了解生產(chǎn)工藝和設(shè)備對控制系統(tǒng)的要求。畫出系統(tǒng)各個功能過程的工作循環(huán)圖或流程圖、功能圖及有關(guān)信號的時序圖。
(4)按照PLC程序語言的要求設(shè)計(jì)梯形圖或編寫程序清單。梯形圖上的文字符號應(yīng)按現(xiàn)場信號與PLC內(nèi)部接口對照表的規(guī)定標(biāo)注。
2．PLC程序設(shè)計(jì)的一般原則
(1)保證人身與設(shè)備安全的設(shè)計(jì)都不是多余的。
(2)PLC程序的安全設(shè)計(jì)，并不代表硬件的安全保護(hù)可以省略。
(3)了解PLC自身的特點(diǎn)。
(4)設(shè)計(jì)調(diào)試點(diǎn)易于調(diào)試。
NEW AMETRIC 08B38 38 TOOTH STEEL 45MM SINGLE ROW CHAIN
C1080 GEAR SPUR 14-1/2DEG 1-1/2 IN SINGLE ROW SPROCKET
NEW MARTIN D60B22H 1 IN DOUBLE ROW CHAIN SPROCKET D4254
NEW MARTIN D40B36 STEEL CHAIN DOUBLE ROW 15/16IN BORE S
NEW MARTIN 35A24 STEEL CHAIN SINGLE ROW 1-1/8IN BORE SP
MULTIVAC 886568 28TEETH CHAIN SINGLE ROW TRANSMISSION 4
NEW MARTIN 2060B18 DOUBLE ROW CHAIN SPROCKET D399313
NEW MARTIN 40BS21 1 SINGLE ROW CHAIN SPROCKET D427171
NEW MARTIN 882C12SS STAINLESS 1IN BORE SINGLE ROW CHAIN
NEW MARTIN 80BTB25 2517 TAPER BUSH SINGLE ROW CHAIN SPR
NEW DODGE RELIANCE 105032 40B18 CHAIN SINGLE ROW 5/8IN
NEW INDAG 50077499 40B36 STEEL 20MM BORE SINGLE ROW CHA
NEW 16 TOOTH BELT SINGLE ROW 1-1/2IN SQUARE BORE SPROCK
NEW REXNORD REX 815-27T 27-TEETH DOUBLE ROW 1-1/4 IN CH
NEW LOMA SYSTEMS 103056 DRIVE CHAIN SINGLE ROW 20MM STA
NEW GATES 8M-32S-12 POLY CHAIN GT2 CHAIN SINGLE ROW IDL
NEW DODGE 096154 35TT525 TORQUE TAMER 25 TOOTH 2 IN SPR
NEW MARTIN 40B22SS ROLLER CHAIN SINGLE ROW 1IN SPROCKET
NEW INTRALOX A29198-4 TABLE TOP SPROCKET 800 10.3PD 262
FLEX
NEW MARTIN 60B20SS 20T NO.60 CHAIN SPROCKET 1 IN BORE
NEW TB WOODS W80-8M-35-SF W808M35 POWER CHAIN SPROCKET
NEW REXNORD 815-20T 20 TOOTH TABLE TOP CHAIN DOUBLE ROW
NEW ASHWORTH CTS-30-26 CLEATRAC 4.286IN OD 1-1/4IN ID B
NEW MARTIN 40BS40 1-1/2 CHAIN SINGLE ROW 1-1/2IN BORE S
TSUBAKI H100B25F 1-1/2 IN SINGLE ROW CHAIN SPROCKET B44
NEW DOBOY 128118 28 TOOTH BUSH TAPER CHAIN DOUBLE ROW S
NEW MARTIN 50BS28 1 SINGLE ROW CHAIN SPROCKET 1 IN D446
NEW MARTIN D40BTB21H-1610 CHAIN DOUBLE ROW SPROCKET D25
NEW MARTIN 35BS48-5/8 SPUR GEAR 48 TEETH ROLLER 5/8IN C
VOITH 825450 REPLACEMENT 27 TOOTH ROLLER CHAIN DOUBLE 2
NEW ASHWORTH P9 23TOOTH KEYWAY BELT SINGLE ROW 1-1/4 IN
NEW MARTIN P56-5M-15-SH 56 TOOTH BELT SINGLE ROW 1-13/1
NEW MARTIN D40B32H 32 TOOTH STEEL 7/8 IN DOUBLE ROW CHA
NEW MARTIN 50B15SS STAINLESS CHAIN SINGLE ROW 20MM BORE
NEW TB WOODS 24XH200-SF QD TIMING BELT SPROCKET 24T 2IN
NEW REXNORD 882 15T 15 TOOTH CHAIN SINGLE ROW 1-1/4IN B
NEW MARTIN 50B35 35 TOOTH STEEL CHAIN SINGLE ROW 2-7/16
BROWNING H100Q21 21 TOOTH CHAIN SINGLE ROW 2-7/8 IN SPR
TSUBAKI H100B25 X 2 1/2 25 TOOTH CONVEYOR 2 IN SINGLE R
NEW MARTIN D40B40 15/16IN ROUGH BORE DOUBLE ROW CHAIN S
NEW AMETRIC 1/2-36 5/8IN ROUGH BORE SINGLE ROW CHAIN SP
NEW MARTIN 60A48H SINGLE ROW CHAIN SPROCKET 3 IN QD BOR
NEW INTRALOX 1100 SPLIT DRIVE 1-1/2 IN BORE SPROCKET D3
NEW INTRALOX D9CVE7-1 CONVEYOR SPROCKET 1-1/2X1-1/2IN B
NEW MARTIN 41B20 STEEL 20 TEETH CHAIN SINGLE ROW 5/8 IN
NEW MARTIN 35B18SS 18 TOOTH CHAIN SINGLE ROW 20MM SPROC
NEW MARTIN 41B28 STEEL CHAIN SINGLE ROW 5/8 IN SPROCKET
MARTIN 40A18 5/8 IN DOUBLE ROW BELT SPROCKET B370848
MARTIN 40A18 5/8 IN DOUBLE ROW BELT SPROCKET B370848
NEW 802R1619 1-3/8IN BORE DOUBLE ROW CHAIN SPROCKET D39
NEW MARTIN D40B20H STEEL 20TEETH 5/8 IN DOUBLE ROW CHAI
NEW HABASIT SP72012A-1-1/4-?K 12 TOOTH CHAIN SINGLE ROW
NEW 18TOOTH SPLIT CHAIN SINGLE ROW 1 IN SPROCKET D32547
NEW MARTIN D40BTB30-2012 CHAIN DOUBLE ROW SPROCKET D256
NEW MARTIN E100B19 19TOOTH IDLER CHAIN TRIPLE ROW 40MM
NEW MARTIN 50H15H CHAIN SINGLE ROW QD SPROCKET D344004
NEW GOODYEAR W-45S-SDS EAGLE PD WHITE BELT SPROCKET D43
MARTIN 50A63 STEEL 1 IN SINGLE ROW CHAIN SPROCKET B3803
NEW INTRALOX S900 61PD 1-5/8IN SQUARE BORE SINGLE ROW C
NEW MARTIN 40BS42 3/4 42 TOOTH CHAIN SINGLE ROW 3/4 IN
NEW MARTIN 40BS42 42TOOTH STEEL CHAIN SINGLE ROW 1-1/4I
NEW MARTIN 60SF42 QD BORE STEEL CHAIN SINGLE ROW SPROCK
NEW MARTIN 60SF42 42 TOOTH BUSHED CHAIN SINGLE ROW SPRO
NEW MARTIN D40BTB30-2012 DOUBLE ROW CHAIN SPROCKET D391
NEW MARTIN 50A35 STEEL CHAIN SINGLE ROW 2-3/4IN BORE SP
NEW LINN GEAR 120TLB35 CHAIN SINGLE ROW 4-1/2IN TAPER-L
NEW MARTIN E80B22H 2-1/4 IN TRIPLE ROW CHAIN SPROCKET D
NEW MARTIN D80B21H 21 TOOTH 2-15/16 IN DOUBLE ROW CHAIN
NEW MARTIN D35B36 3/4IN ROUGH BORE DOUBLE ROW CHAIN SPR
NEW PAAL 08I02.139 08BZ21K 21TOOTH 1-15/16IN SINGLE ROW
NEW FALCON PLASTIC 1 IN SINGLE ROW CONVEYOR CHAIN SPROC
NEW INTRALOX 011577 1-1/2IN ID SINGLE ROW CHAIN SPROCKE
NEW DOUGLAS MACHINE N109436 SQUARE BORE 1-1/2IN CHAIN S
NEW MARTIN D50C16H STEEL CHAIN DOUBLE ROW 1-3/4 IN SPRO
NEW GATES 8MX-22S-21 POLYCHAIN 14730RPM SINGLE ROW 5/8
MARTIN D35B28 3/4IN BORE DOUBLE ROW CHAIN SPROCKET D389
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