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第一部分是上电处理。plc上电后对系统进行一次初始化，包括硬件初始化和软件初始化，停电保持范围设定及其他初始化处理等。
在系统中，每台循泵的冷却水管路上分别设置两个冷却水压力低ⅱ值和一个冷却水压力低ⅰ值。冷却水压力低ⅰ值作为启动备用冷却水泵的条件。冷却水压力低ⅱ值作为启动循泵的闭锁条件，当循泵未运行时，两个冷却水压力低ⅱ值都动作，不允许启泵，当循泵运行时，两个冷却水压力低ⅱ值都动作后，延时20s，跳闸循泵。冷却水压力低ⅱ值的闭锁条件可crt上选择是否投入，当发生冷却水压力开关故障时可屏蔽，便于检修工作。
主要由系统内部元器件及电路间的相互电磁辐射产生，如逻辑电路相互辐射及其对模拟电路的影响，模拟地与逻辑地的相互影响及元器件间的相互不匹配使用等。这都属于plc制造厂对系统内部进行电磁兼容设计的内容，比较复杂，作为应用部门是无法改变，可不必过多考虑，但要选择具有较多应用实绩或经过考验的系统。
（4）电源
在设计交底的过程中要指出的是，对于设计中的任何变更，你只能提建议，而不是擅自做修改。因为，你的职责是按照设计施工，而不是设计，因此，对于任何你发现的不合理的东西，你可以提出意见，但必须要等到设计变更确认书下到你手里后，你才能按照变更后的设计工作，尽管这个变更可能是你的意见。还有，即使初的设计也是你做的，你在变更后，也要通知客户，并取得客户的书面同意。
对于小型控制系统或不需要在线编程的系统，一般选用价格便宜的简易编程器。对于由中、高档plc构成的复杂系统或需要在线编程的plc系统，，可以选配功能强、编程方便的智能编程器，但智能编程器价格较贵。如果有现成的个人计算机，也可以选用plc的编程软件，在个人计算机上实现编程器的功能。
2限度地满足被控对象的控制要求。
ebro eb 5 fs5 dn40 pn16, 4-10bar mático accionador rotativo eb05fs5 f04/v11
eaton fuller trts-0062 autoshift gen ii troubleshooting guide manual 1999
bosch rexroth csb01.1c-s3-ens-nnn-nn-s-nn-fw indradrive control single-axis
x-lite x-1003 tourer n-com, flat black klapphelm, motorradhelm, helm , gre l
ge fanuc qpi21100e2p quickpanel total control 9 monochrome el hmi, 120vac
nor-cal products gnv-102-a21 genesis modular vacuum valve, pressure: 60-80psi
enerpac mmw 221 0 3194b hydraulikzylinder kompacktzylinder kurzhubzylinder 22 t
pepperl+fuchs wcs-is311 interfaccia modulo parte. nr 184096 interfacciamodul
listing hammond ph100aj industrial control transformer 100 va 60hz -
cutler hammer kwc3400 400a 690v 3p breaker boxed global version kdc3400
smc eafd3000-f03d microfiltro, 0.01μm filtro unidad de submikrofilter, 3/8
rcm flow gauge 1 1/2-71-r-4 - surplus!
siemens simatic s5 6es5 420-7la11, 6es5420-7la1 digital-eingabe estado-e 12
legris “t” tube fitting connector 3103 60 14 nib - surplus!
gast spp-15ebs-101 ddl linear diaphragm air vacuum pump compressor 115vac/60hz
ge fanuc ic693pcm301j programmable coprocessor 192k, missing cover
endress+hauser ddat02-a1a2a flow meter, voltage: 20-30vdc, pressure: 580psi max
sciemetric sigpod 1804 process monitor, 8 digital i/o, 4 analog in, 4 encoder in
turck bc3-s12-an6x capacitive proximity sensor, range: 0.3-3mm, power: 10-30vdc
parker compumotor sm231ae-ntqn servo motor 340v 2.1a 46oz-in
sick l40s-21ka1a photoelectric safety led sensor switch sender, 0-10m, 24vdc
reliance electric p14x1482s duty master new 1hp motor
lot of 4 parker 1l943-8-8 new connectors 1l94388
pmeumatic products 1204416 used amloc remote sensor w/o probe 1204416
tyco / grinnell 909 new 3 plain end coupling 909
siemens 18-483-905-504 used rms-ti-t static trip iii 18483905504
allen bradley comm. module 1203-smi ser. a new 1203smi
allen bradley 2090-u3bb-d44 new breakout 2090u3bbd44
box of 24 electroline e.m.t. 3/4 compression connectors l-23 new l23
schneider telemechanique tsxdet3242 input module tsx det 32 42,
karl storz 403575 mv espéculo nasal, espéculo 160mm, schnabell?nge 70mm
baumer iffm 20p17a3/s35l induttivo sensore di prossimità inductive proximity
df8100494 24-04
crouse-hinds enp6152 hazardous locaiion plug 15a, 250v
mersen 21038r fuse block/holder 61 - 100amp 250vac 3-pole -
siemens 6ds1715-8bb teleperm analógico rechnerbaugruppe 6ds1 715-8bb nuevo
smc evz5423 5moz 01f,5/2 valve de distribution vanne magnétique
flex-in-line 10:1 gear bmcq32-a - surplus!
siemens 6fc5012-0ca03-0aa0 sinumerik interfaccia 840c / ce,im328-n,nuovo
stewart warner water temperature gauge part # 82703-72 new old stock
furness controls model 354 fco354 pressure transmitter, 0-197 pa, 166.7 l/s
asco sc8262g38vh solenoid valve red-hat ii, 6.1w 60hz, round solenoid 1/4 npt
smc nav3000-n03-5dz soft start valve, vhs30-n03-z relief, aw30 filter/regulator
scott instruments 4600mb universal gas transmitter w/ 0-1ppm diborane sensor
parker s83-93-mo compumotor, .375 shaft 300 oz-in 9-pin cable 90-130vac nema 34
roi 30-4000-02 optical video probe 2.0x 15-pin d-sub interface w/mount
moog d122-027-a011 used d122027a011
firefly ff404-2 used pc board module m/c-f12 ff4042
ross e5 element kit 942k77 new 942k77
johnson controls v 3754 1029 9205 new-no box diaphragm actuator v375410299205
pilz 774080 used pnoz 11 safety relay 774080
allen bradley 1734-adn ser b new factory sealed devicenet adapter 1734adn
boston gear x726-3a-30m new 53842 x7263a30m
artisoft ethernet adapter ae-2/c a2c189492 10456 used ae2c 10456
festo ilot de vannes 195706,195740, 541519,533360, 533361,195742, 541082, 533347
beckhoff kl1904,4 kanal digital eingangsklemme kl 1904 ingresso digitale
büse california giacca,4220-a,giacca motociclista,leder- giacca, nero, taglia 42
! allen bradley 1489-a2d100 10a 2p 480y/277v circuit breaker
eaton 10250t51p 1 nc contact block
siemens 6sl3120-1te28-5aa3 sinamics s120 single motor-module, versione: f nuovo
siemens 6sn1118 0aa11 0aa1 simodrive 611-a modulo di controllo 6sn1 118 0aa11
mersen 20a time delay fuse ajt20 (lot of 18) - surplus!
powerohm 33 ohm panel mount resistor cr300-33 - surplus!
comtrol 5002111 devicemaster rts db9m 4-port ethernet server, 00-c0-4e-07-53-a7
kawasaki genuine parts cap part # 11065-2138
anorad d15383-c high power motor driver slaves ii w/b12306 motor drive master
mitutoyo 7305 metric dial indicator thickness gauge *missing lifting lever*
mac valve 45a-maj-ddaj-2ke bank of 7 pneumatic solenoid valves 24vdc 5.4watts
lot of 5- hubbell 2611 twist turn lock plugs 30a 250v 2p 3w nema l5-30p *nib*
polytec vm501-2200a laser vibrometer bragg cell box (aom), flying leads, ofv-501
kajaani electronics a4280362 new type 28dj-1 control cable 10m a4280362
indramat trans01.7/1/0p01 reman. trans01710p01
eagle controls tm4a60102 drum switch nib
triomotion p136-05565 ver. c used/parts mc206x circuit board p13605565
sti 43776-0010 used relay module 437760010
allen bradley 1775-mx remanufactured memory communication module 1775mx
lincoln electric tf5339c ac motor 230/460vac 2.6/1.3a 3ph 3/4hp 1740rpm *no box*
gse 40-20-24014 control board, pc695c,
dr?ger pac iii appareil de mesure un gaz et d'alerte 83 13 650 kalibrierungsgas
phoenix contact psr-spp- 24uc/esam4/8x1/1x2 relè sicurezza 2963996 safety
phoenix contact interbus ib il 24 pwr interior pac terminales de alimentación
abb end plate - complete custom; 2rda008850a5001
cutler hammer ecn1611ajb enclosed nema size 1 full voltage non-reversing starter
wandel & goltermann wwg hormiga 20se advanced red tester,óptica,acterna
siemens 6es7 314-6ch04-0ab0 simatic s7 unità centrale 6es7314-6ch04-0ab0 ,fs : 6
siemens 6es5 450-8fa12 digital edition 6es5450-8fa12 digital output module e :3
siemens 6av3637 1ll00 0ax1 panel de operación op37,6av3 637 1ll00 0ax1
standard genuine parts switch part # ts-299
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stihl genuine parts clutch shoes part# 1119 162 0800
allen bradley/new flyer card-cpu 502 1747-l524
new flowline lp15-1405 superguard capacitance liquid lever switch 12-36vdc no/nc
octel 740-6506-001 dc power supply & 3.5 floppy, fdd, out: 42-60vdc in: 115vac
watts f71-02bj air filter 1/4 npt , with 3/8 nsf-51 valves
lot of 11 new smc sy3000-6a-c6 one-touch solenoid valve block ports 6mm
model ta-40cs valve used ta40cs
flakt epir controller v.4535341.0100 used v45353410100
reliance electric 45c63 new automate dual 24vdc 2a output controller 45c63
fanuc pcb a20b-3300-0362 new a20b33000362
mks instrument mass-flo controller 1179b00714cr14v 25mw1-550-813 new 25mw1550813
allen bradley m23 cordset 30m 889m-f12ah-30 ser. a new 889mf12ah30
leitz microscope lens revolver
1pc. crouse-hinds gual59 1 1/2 conduit outlet box for hazardous locaiions,
festo cmms-st-c8-7 motorcontroller controller 547454, hw 1.3, sw 1.2.0.1.2
satz v?lkel 57750 m12 hsse iso 2 handgewindebohrer satz gewindebohrer
phoenix contact ib il 24 do 32/hd pac inlineklemme digitalausgabeklemme 2862822
cat caterpillar no. 120 140 motor graders shop repair service manual reg00762
abb eoh361rk hd fusible heavy duty safety switch; 30a 3p 600v -
mepco centrifugal pump rc06-12-030-34-3
siemens 6sl3120-1te28-5aa3 sinamics s120 single motor-module, version: e
jamesbury actuator vpvl300 da b as
nibco 3″ flanged gate valve f2613 - surplus!
compumotor pds13-57-83 dual shaft stepper motor 0.25 shaft diameter nema 23
ge fanuc ic693chs397h 5-slot expansion base
siemens i-t-e sentron fxd628175 2 pole 175 amp circuit breaker
suburban sv-411 precision sine vise 4 wide jaws 7 capacity 0.0003 sqr/parallel
smc cxsjm10-10 compact pneumatic air cylinder 0.7mpa max pressure 10mm stroke
ppt vision 661-0172-h led light ring 12vdc 2.125 id 48 cable 5 wire w/ plug
thermolyne s108500 safe-t s10 explosion proof stirrer 60-1200rpm w/ conduit box
migatron rps-102-14 c96 new ultrasonic ranging proximity sensor rps10214c96
emerson control card 2400-4005 rev. a used 24004005
kt / giddings & lewis 810-21980-25 used slot rack / i/o motherboard 8102198025
indramat hds03.2-w075n used servo drive hds032w075n
valtek mark 1 control valve 1 1/2 new
azbil / yamatake fl7m-7j6hd-cn03 new proximity sensor fl7m7j6hdcn03
decitek 261l7-004 used tape reader head 261l7004
better packages th55xx new top heater unit th55xx
bosch 3842525, 3 842 525 858 hubeinheit pmatik-zylinder dreheinheit grabber
iwaki eh-e55fc-20epe6 dosierungspumpe metering pump pumpe 75 l/h
festo emms-as-70-m-rsb servomoteur 550120 servo moteur mn: 2,29 nm, 4100 rpm
siemens 52pa8a1 oil tight pushbutton operator flush cap(black)
square d 9012 gaw-6 adjustable pressure switch series c
siemens 6ds1213-8aa teleperm acoplador inductivo 6ds1 213-8aa version 5 nuevo
illuminating experiences lamp 1721bz - open box clearance!
smc mhz2-20d pmatic 2-finger-greifer parallel gripper fingerhub 10 mm
pro-face operator interface 3580205-04 agp3200-a1-d24 - surplus!
mopar genuine parts reservoir washer fluid part # 04882071 new old stock
grizzly g1053 dividing head & tailstock, type bs-0, 1:40 ratio, 1000 divisions
toro lawn more pto guard asm part # 99-8408,
lot of 4 norton assorted sizes 32a60-i8vbe 8 x 1/4 x 1-1/4 grinding wheels
nalgene 5242 plastic pipet jar, size f, 6.9 od x 36 height, hdpe
omega dp41-u-a high performance panel meter 115-230vac 6-digit display 4-outputs
turck vb 1003-px10-bs14 junction box 10-port m8 snap-on picofast 3-pin i/o
reliance electric 0-52014 new pc board 052014
hammond manufacturing ej443 new eclipse junior 1 door enclosure ej443
gould r.b. denison jk4 new limit switch jk4
sti / omron ms4800s-20-1400-r / ms4800s-20-1400-x used light curtain set 1400mm
falk 1070t new hub 1.375 bore 1070t 0704637
martin 160b12 sprocket, stock bore,
allen bradley 802m-dy12 new pre-wired factory sealed limit switch 802mdy12
lambda jwt75-5ffia power supply, input: 100-240vac 50/60hz 1.4a, out: 5/15vdc
phoenix contact psi-rep-profibus/12mb 2708863 repeater
internormen 300219 filterelement 01.e 330.25vg.16.s.p.- filter, in ovp
balluff bkt 67m-001-u-s92 contrast scanners bkt0001 switch tastbereich 6 12 mm
square d kal3625023m 6176 3p 250a motor circuit protector w/ shunt trip -
square d 9421lh6 operating mechanism - /out of box
allen-bradley control logix analog input, ser. a 96240876-a01 - surplus!
ferraz shawmut 80a time delay fuse ajt80 (lot of 9) - surplus!
siemens 6fc5012-0ca03-0aa0 sinumerik interfaccia 840c / ce,im328-n,nuovo
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allen-bradley terminal lug assembly 1494v-fsr611 - surplus!
allen bradley 440n-c02068 guardmaster ferrocode control unit, supply: 24vac/dc
danfoss t2 and te2 expansion valves partial set with 6 orifice types
lincoln autoluber lube cord part # 246431 new old stock
new parker bd03-abn-a cartpak body, cetop 3 size, d0r mount, 3000 psi
seicor fbc-006 precision diamond fiber cutter 80 μm-140 μm < 0.7deg tolerance
new mdc 0796801 double ended 10 pin feedthrough
new in box mac valves 825c-pm-591ja-652 solenoid valve *factory sealed*
omron cj1w-srm21 used compobus / s master unit cj1wsrm21
lucent 44ww28 used ccu 32 4:7 module 44ww28
omron e3s-2le4 new-no box photoelectric switch e3s2le4
festo linear actuator 3/4bore 22stroke dgo-3/4-22-pp-v-a-b new dgo3422ppvab
moog d122f022-a015 used control panel d122f022a015
dalton torque limiter bore 3/4x1 osdc-225 new osdc225
allen bradley 100-d420 ei ser. b used contactor 575 vac 3ph 40hp 100d420ei
clinton electronics 663pvmges ceull76 1/4 a1te 1-014-1383 crt, nib
minebea 23ly-c208-01w multiphase motor + oriental d6cl-6.3 qs8 clean damper
gfg gma 101 e, trasmettitore gasmesscomputer gasmeldeanlage gaswarnanlage
hilzinger disco de pulido algodón 300mm máquina polierring brillo intenso nuevo
lsis metasol mc-225a-240v coil for contactor 100-240vac
abb sace tmax t6n800bw circuit breaker 800 amp 3p 600v load tested
innomag cast iron outer magnet - surplus!
issc solid state timer 1012-1-m-2-b - surplus!
mecman hydraulic cylinder repair kit 04903-011-00 - surplus!
siemens 6av3637-1ll00-0ax1 operator panel op37, 6av3 637-1ll00-0ax1 version: a01
technocheck valve model 3 serial k7248 new old stock
caterpillar genuine parts hose part # 2n9846
toro castor wheel fork part # 92-5578
watlow pm6c3cj-alejaaa controller, 1/16 din, supply: 20-28vac or 12-40vdc
lot of 2 charles supper x-ray diffraction fixture / tech circle *as-is*
oriental motor arm66ac-t3.6 stepping motor, power: 8.84vdc dc 0.74a, 0.1deg/step
speedaire 4zl34 pneumatic oil filter, 3/8 in. npt, 21 cfm
woodhead connectivity/brad harrison 301000c11f400 new cable 301000c11f400
sensotec 41/0574-03-02 new 10000 lbs load cell 4105740302
falk 235hfn41 new coupling 235hfn41
fanuc a20b-2102-0050/06e used control board a20b2102005006e
siemens f351hch new 30a i-t-e enclosed switch w/ crouse hinds wbr receptacle
cutler hammer circuit breaker rea3100 1375d82g45 new-surplus rea3100 1375d82g45
allen bradley 1762-ob16 ser. a rev. a used 16 pt. 24vdc source output 1762ob16
ge 50-140034sjaa shunt, 600a, 100mv,
sick kt8w-p111c kontrastsensor 1027919 sensor, contrast sensor sensing dis. 10mm
datalogic viper-net dl 9600/rf-3 handheld barcode laser-scanner 942804064
rotorspray rs45-a90 sin schleuderscheibe rotorspay-einheit 4.130.00.070135.300d
marathon 75 hp 365t 4l365ttgs7036ktw motor explosion proof hazardous 230/460
siemens 3rv2021-4ba15 manual motor 14 - 20amp auix. 1 n.o. - 1 n.c. - nib
west instruments mlc9000 b220 communication module
siemens simatic 6es7360-3aa01-0aa0 connexion en 360, 6es7 360-3aa01-0aa0 e-st.3
smc ex245-dy1-x37 digital output ausgangsmodul 8x nuevo emb. orig.
duct-o-wire pushbutton pendant station pps-2-1a - surplus!
uro genuine parts mirror chrome cover part # cm-lr
ctc 2376 screw terminal distribution block, 20 screw block to 34 pin 2700 series
allen bradley 5130-rm1 128k resource manager, plc
on-trak ot301sl amplifier board d-sub 9-pin
sick fgss 450-23 light curtain sender 450mm detection, 18m range, 24vdc
lot of 5 motor shaft flexible beam coupler coupling 0.25 id, 0.74 od, 1.0 l
red lion imd2 panel meter process controller 115/230vac 14va ±200μa-2a signal
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endress hauser ftl 360-rgn2a4l used liquiphant ii level switch ftl360rgn2a4l
ringball 1215 k new self aligning double row ball bearing 1215k
ifm si5000 new efector 300 flow monitor si5000
schneider automation 16-point input module tsx-det-1612 used tsxdet1612
nycoil 2n4as22-25 new 1/4idx25'x1/4npt bonded nylon hose 2n4as2225
balluff blfbkss32m30 transducer cable new
1 pc. square d kh361251021 i-line circuit breaker, 3 pole, 125 amp,
abb t3s225tw circuit breaker 225 a 3p - surplus
siemens 6es5256-3aa11 simatic s5 sw monitoranschaltung 6es5 256-3aa11 e-stand 7
sony vct-551 tripod adaptor,
allen bradley 77118-503-51 used user interface with (4) 77107-503-03a cables
cincinnati lamb l-6143-760.06-023 new spindle l614376006023
allen bradley 1794-of4i ser. a used isolated analog output module 1794of4i
cutler-hammer 10250t181l pilotlight led; no lens, 30mm, led not included.
moyno c31-0fq 14.5″ steel progressive cavity pump stator - surplus!
janesville tool & manufacturing a-2070-a pneumatic press 3 stroke *for parts*
smc ecc50e-20r-23-x1 step sequencer controller
okuma bl-mc100e-20t new servo motor blmc100e20t
procentec combricks testa station 1c, 101-20011a basic webserver nuovo
eaton/cutler-hammer hkddc3400w f01 400 amp circuit breaker 600vac 3-pole - nib
baumuller ds 45-l used servo motor 257237 0.9 kw 3000 rpm ds45l
dyson 903349-03 motor & housing assembly, for dc07 & dc14,
kuhnke pmt 1f2b3 pneumatic miniature timer, 3-30sec, 30psig *visible gap*
square d pfc4002c power factor capacitor 2.5kvar 480v 3ph
oriental motor vexta sg8030jy stepper controller, voltage: 24vdc 0.1a
contiweb / goss wh794167 new 3ph motor with p52 gearhead / reducer 7:1 wh794167
rvsi ner 204203 mv multi-axis imager 12vdc 882ma fov-26 stdoff-71
abb acs301-1p6-3 frequency converter voltage: 380-480vac 3a 3p out: 0-u1 2.5a
iai intelligent rc-rsa-m-300-m-b-ft-eu electric actuator cylinder 300mm stroke
hubbell lighting fixture hostiveelite electrical ezh400-q - open box clearance!
westinghouse/cutler-hammer rms/r500 digitrip, 1232c84g02, rh52clsi,
siemens siguard 3rg7834-6dd00 laser scanner ls4-4 schutzf. 4 m,incl. accessories
tri-clover 5″ stainless steel semi-open impeller - surplus!
siemens simatic s5 analogausgabe 6es5470-4ua13 output modul 6es5 470-4ua13
allen bradley spare output ground sensor 50385 rev 01 new factory sealed s50385