CC-PAIH02
CC-PAIH02
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為了提高PLC控制系統(tǒng)工作的可靠性,可以專門設(shè)置一個(gè)定時(shí)器,作為監(jiān)控程序部分,對(duì)系統(tǒng)的運(yùn)行狀態(tài)進(jìn)行檢測。若程序運(yùn)行能正常結(jié)束,則該定時(shí)器就立即被清零;若程序運(yùn)行發(fā)生故障,如出現(xiàn)死循環(huán)等,該定時(shí)器在設(shè)定的時(shí)間到就無法清零,此時(shí)PLC發(fā)出報(bào)警信號(hào)。在設(shè)計(jì)應(yīng)用程序時(shí),使用這種方法來實(shí)現(xiàn)對(duì)系統(tǒng)各部分運(yùn)行狀態(tài)的監(jiān)控。如果用PLC來控制某一對(duì)象時(shí),編制程序時(shí)可定義一個(gè)定時(shí)器來對(duì)這一對(duì)象的運(yùn)行狀態(tài)進(jìn)行監(jiān)視:該定時(shí)器的設(shè)定時(shí)間即為這一對(duì)象工作所需的zui大時(shí)間;當(dāng)啟動(dòng)該對(duì)象運(yùn)行時(shí),同時(shí)也啟動(dòng)該定時(shí)器。若該對(duì)象的運(yùn)行程序在規(guī)定的時(shí)間結(jié)束工作,發(fā)出一個(gè)工作完成信號(hào),使該定時(shí)器清零,說明這一對(duì)象的運(yùn)行程序正常;否則,屬運(yùn)行不正常,發(fā)出報(bào)警信號(hào)或停機(jī)信號(hào)。監(jiān)控程序的梯形圖如圖7所示。圖7中定時(shí)器T1為檢測元件,X001為控制對(duì)象動(dòng)作信號(hào),X002為動(dòng)作完成信號(hào),M2為報(bào)警或停機(jī)信號(hào)。假設(shè)被控對(duì)象的運(yùn)行程序完成一次循環(huán)需要50s,則定時(shí)器K值可取510(T1為100ms定時(shí)器)。當(dāng)X001=1時(shí),被控對(duì)象運(yùn)行開始,T1開始計(jì)時(shí);如在規(guī)定的時(shí)間內(nèi)被控對(duì)象的運(yùn)行程序能正常結(jié)束,則X002動(dòng)作,M1復(fù)位,定時(shí)器T1被清零,等待下一次循環(huán)的開始;若在規(guī)定時(shí)間沒有發(fā)出被控對(duì)象運(yùn)行完成的動(dòng)作信號(hào),則判斷為故障,T1的觸點(diǎn)閉合,接通M2發(fā)出報(bào)警信號(hào)或停機(jī)信號(hào)。
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BURNDY CONNECTORS 10 COUNT NIB N150 3 0 STR CU
API ELMO SERVO MOTOR 3HAC10555-1 99030
LUMBERG 5 PIN 18 AWG CABLE RK 50-694/5M
WOODHEAD BRAD HARRISON 4-POLE MALE 20M 16/4 CABLE 104007A45M200
ALLEN BRADLEY INPUT MODULE 24VDC 1734-IB4 SER.C
BRAD CONNECTIVITY MINI CHANGE RECEPTACLE 12P FEMALE 16AWG 1300150071
BRAD HARRISON CABLE 5-PIN NIB 775030A03F060
FLEX-CABLE 24" LONG 1000 MCM AIR-COOLED CABLE 24" OF HOSE /2" ENDS 100703
ABB ELMO SERVO MOTOR 3 HAC 10674-1/0 PS60/4-50-P-LSS?-4552
REXROTH 2011 CIRCUIT BOARD REV.B BDA-1
LUMBERG 4A 250V 22/3 CABLE RST 3-RKWT 4-3-610/4 100571
STANLEY 16" WIRE LOT OF 16 S8335/.36 100094
TURCK 4 PIN CABLE RSM RKM46-0.5M
ABB API ELMO SERVO MOTOR PS 90/6-57-P-LSS-4?404 / 3HAC 3403-1/2 103865
WOODHEAD DEVICENET INTERFACE CARDS REV-1.2.1 NIB SST-DN3-PCU-1 101871
FLEX-CABLE 84" LONG 300MCM KICKLESS COLOR-FLEX 30LC175H17H 100661
BRAD HARRISON CABLE 5P M/F ST/ST 3FT 16/5AWG NIB 115020A01F030
CINCINNATI MILACRON RECORDED PROGRAM CHIP 10 IN BOX 6589
CIRCUIT CONNECTOR BOARD 331LA09661 / QPC910/4
FANUC NE-2002-973-001 6 PIN MALE ACCUSTAT PROCESS CABLE, NEW
KAWASAKI ROBOTICS CONTROL BOARD 1HP-51 / 50999-1692R02
ABB CABLE 60X2021884P-25F?T 103473
FANUC ROBOTICS VELOCITY CONTROL UNIT A06B-6050-H003
FOXBORO MODULE CIRCUIT BOARD ST-D F8Q52B / 2AX+N4 / N0311FG-B 103059
ATLAS COPCO ASSEMBLY SYSTEMS 16 AWG CABLE 4CDR
TURCK BUS STOP MALE/FEM CABLE NIB U5450-60 / RSM RKM 579-5M
OMRON INPUT OUTPUT MODULE 24V CPM2C-20EDR
RELIANCE ELECTRIC 10A 300V CONNECTOR 707226-11D 101359
RELIANCE ELECTRIC 10A 300V CONNECTOR 707226-11J 101361
ELECTRO-CRAFT SERVO MOTOR E26-3 728-033-0865
APPLETON 2 1/2" ALUMINUM MC CABLE CONNECTOR NIB TMC251250
TURCK BUS-TOP CORDSET NIB RSS RSS 843-3M / U7712-3 100776