詳細內(nèi)容：聯(lián)系人：黃曉飛（銷售工程師） 移動電話:18030263579 固話:0592-6895320 QQ：2472574325 超時檢測機械設(shè)備在各工步的動作所需的時間一般是不變的，即使變化也不會太大，因此可以以這些時間為參考，在PLC發(fā)出輸出信號，相應(yīng)的外部執(zhí)行機構(gòu)開始動作時啟動一個定時器定時，定時器的設(shè)定值比正常情況下該動作的持續(xù)時間長20％左右。例如設(shè)某執(zhí)行機構(gòu)（如電動機）在正常情況下運行50s后，它驅(qū)動的部件使限位開關(guān)動作，發(fā)出動作結(jié)束信號。若該執(zhí)行機構(gòu)的動作時間超過60s（即對應(yīng)定時器的設(shè)定時間），PLC還沒有接收到動作結(jié)束信號，定時器延時接通的常開觸點發(fā)出故障信號，該信號停止正常的循環(huán)程序，啟動報警和故障顯示程序，使操作人員和維修人員能迅速判別故障的種類，及時采取排除故障的措施。 全球瘋狂低價甩賣 NEW Texas Instruments TI U-05N 12-24VDC Input Module NEW Allen-Bradley 802T-BAP1 Series H Limit Switch 1794-OV16現(xiàn)貨AB 1794-OV16現(xiàn)貨AB 1794-OV16現(xiàn)貨AB Allen-Bradley GG-473 Size 5 120VAC Operating Coil NEW Texas Instruments TI U-25N 100-120VAC Input Module (5) NEW Banner Engineering PBA-1 Power Blocks NEW Digital 70-18960-00 LA210 Servo Motor Reliance Electric 0-52823 DFSA Drive Module PULNIX TM-440XC High Resolution Camera TM-440 PULNIX TM-440X High Resolution Camera TM-440 PULNIX TM-440XC High Resolution Camera TM-440 NEW Westinghouse ART-OF 1264C62G19 Solid State Timer NEW Siemens 6EC1002-0A PLC Circuit Module NEW Tesch F122x04 Safety Expansion Relay F122 Reliance Electric 0-52837 ACCA Drive Module New GE Fuji 6KV$-1PG05 A3603 AF-300V$ Module Honeywell 82408485-001 SBLA-III Control Board Cincinnati Electrosystems 9650-128-D 128K Converter BALOGH MRER-21/AA TRANSCEIVER MODULE MRER21 HIRSCHMANN ENT-10515-R AC POWER SUPPLY MODULE (5) Buss R60060-3CR Class R Fuse Holders (5) Allen-Bradley 100-F-A40 Auxiliary Contacts NEW Ametek 80466SE Control Board NEW Datalogic ET3-5-C15 Proximity Sensor HIRSCHMANN ECFL 2 TWIN FIBER OPTIC INTERFACE MODULE Allen-Bradley 7300-UOJ CNC Control Board Allen-Bradley 1771-TCM/B Temperature Control Module AXIS ELC900 Controller Board Allen-Bradley GG-473 Size 5 120VAC Operating Coil GE Fanuc IC697MDL740 24/48 VDC Output Module LAND INFRARED LANDMARK BASIC LMB SIGNAL PROCESSOR Foxboro CM902WL I/A Series Power Module 2 - Rev. B GE Fanuc IC697MDL750 24/48VDC Output Module Reliance Electric 0-52876 VTGA Drive Module (5) Siemens BQD120 Bolt-On Circuit Breakers NEW Bailey Controls 6634205A1 Termination Loop Cable New Reliance Electric 0-52711-3 230V Dual Input Module AMCI Modicon 1834 PLC Series Encoder Module NEW Reliance Electric 0-55300 DV/DT Minpak Plus Board GIDDINGS & LEWIS 502-03657-03R2 PiC900 I/O DRIVER NEW Newport 203A-3 Digital Panel Meter