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廈門市泰尼電器有限公司
主營產(chǎn)品： AB模塊PLC |
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廈門市泰尼電器有限公司
主營產(chǎn)品： AB模塊PLC |
| 參考價 | 面議 |
1734-IB2+++1734-IB2
+++
PLC的"串行"運行方式與控制程序的編制
PLC與繼電接觸器控制的重要區(qū)別之一就是工作方式不同。繼電接觸器控制系統(tǒng)是按"并行"方式工作的，也就是說是按同時執(zhí)行的方式工作的，只要形成電流通路，就可能有幾個電器同時動作。而PLC是以"串行"方式工作的，PLC在循環(huán)執(zhí)行程序時，是按照語句的書寫順序自上而下進行邏輯運算，而前面邏輯運算的結(jié)果會影響后面語句的邏輯運算結(jié)果。因此梯形圖編程時，各語句的位置也會對控制功能產(chǎn)生關(guān)鍵影響。
：張亮（工程師） 專線：
24小時移動專線： 【】
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HP HEWLETT-PACKARD 3468A MULTI METER
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IDC CORP TM88-DAD CIRCUIT BOARD REV. D TM88DAD
MDC 821001-2002 FLANGE TUBING 7 1/4 LENGTH 82100120
RED LION 4710225 SHAFT ENCODER MODEL 0374-WW13 REPAIRED
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SIEMENS 6FX-1124-4CD00 LOGIC BOARD 580 244 9004.00,
ALLEN BRADLEY 1745-LP103 PROCESSOR UNIT SER. D FRN. 5,
EDI ED406-102-4D-N1 UP TIMER W/ RESET DIGITAL DISPL
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OMRON 3G2S6-CPU16 PROGRAMMABLE CONTROLLER 24V AC/DC 3G2
INTERNATIONAL BUSINESS MACHINES IBM PN85F9041, 85F9041
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