AB 1746-HSRV 咨詢熱線--17750626260
有極強(qiáng)的自檢及保護(hù)功能。
①故障檢測——軟件定期地檢測外界環(huán)境,如掉電、欠電壓、鋰電池電壓過低及強(qiáng)干擾信號(hào)等。以便及時(shí)進(jìn)行處理。
②信息保護(hù)與恢復(fù)——當(dāng)偶發(fā)性故障條件出現(xiàn)時(shí),不破壞PLC內(nèi)部的信息。一旦故障條件消失,就可恢復(fù)正常,繼續(xù)原來的程序工作。所以,PLC在檢測到故障條件時(shí),立即把現(xiàn)狀態(tài)存入存儲(chǔ)器,軟件配合對(duì)存儲(chǔ)器進(jìn)行封閉,禁止對(duì)存儲(chǔ)器的任何操作,以防存儲(chǔ)信息被沖掉。
③設(shè)置警戒時(shí)鐘WDT(看門狗)——如果程序每循環(huán)執(zhí)行時(shí)間超過了WDT規(guī)定的時(shí)間,預(yù)示了程序進(jìn)入死循環(huán),立即報(bào)警。
④加強(qiáng)對(duì)程序的檢查和校驗(yàn)——一旦程序有錯(cuò),立即報(bào)警,并停止執(zhí)行。
⑤對(duì)程序及動(dòng)態(tài)數(shù)據(jù)進(jìn)行電池后備——停電后,利用后備電池供電,有關(guān)狀態(tài)及信息就不會(huì)丟失。
PLC的出廠試驗(yàn)項(xiàng)目中,有一項(xiàng)就是抗干擾試驗(yàn)。它要求能承受幅值為1000V,上升時(shí)間1nS,脈沖寬度為1μS的干擾脈沖。一般,平均故障間隔時(shí)間可達(dá)幾十萬~上千萬小時(shí);制成系統(tǒng)亦可達(dá)4~5萬小時(shí)甚至更長時(shí)間。
DELPHI OXYGEN SENSOR ES10013 NIB
DELPHI OXYGEN SENSOR ES10640 NIB
DELPHI OXYGEN SENSOR ES10008 NIB
DELPHI OXYGEN SENSOR ES10595 NIB
DELPHI OXYGEN SENSOR ES10012 NIB
THERMODISC 6000W 280-480VAC 3000W 120VAC THERMOSTAT 7025
BEI SENSORS & SYSTEMS ROTARY ENCODER 924-01002-7253
OHMITE D25K150 25 WATTS NIB
PECO SENSOR CARRIER TB155-026 NIB
UNSON CORPORATION PRESSURE TRANSDUCER 8627 TYPE C
BANNER * MAXI-BEAM SENSOR NIB * MODEL RSBF
GEMS FS-925 171990 PISTON TYPE ALLOY FLOW SWITCH, NIB
NAMCO EE510-72042 INDUCTIVE PROXIMITY SENSOR, TUBULAR, WELD FIELD IMMUNE, NNB
SICK LIGHT CURTAIN MSLS 05-1221
RKI INSTRUMENTS OXYGEN DETECTOR SENSOR 65-2033RK / ES-87A
BALLUFF REMOTE SENSOR RXT 1805-J
GP:50 PRESSURE TRANSDUCER 130-VE
MYRON L COMPANY SERIES 750 MONITOR/CONTROL?LER 758-15
FOXBORO PLATINUM TEMPATURE DETECTOR PR-13UBS-010 104055
KEYENCE SEPERATE AMPLIFIER TYPE PRESSURE SENSOR AP-40A
KEYENCE LIGHT CURTAIN RECEIVER SL-C1GH-R
STI * LIGHT CURTAIN * 42682-0280/MS44?26BX
AIR GAGE 2MM RANGE SPRING PROBE TRANSDUCER, DP/2/PE
DELPHI OXYGEN SENSOR ES10139 NIB
RIB ENCLOSED PRE-WIRED PILOT DUTY RELAY RIBU2C
SONY MAGNESCALE LINEAR ENCODER SR33-082AL035/C?N33
MICRO SWITCH SPLASH PROOF SWITCH 0P-AR
ROBOHAND DESTACO 12mmX50mm QUICK DISCONNECT PROXIMITY SENSOR OISP-017 NIB