PMC676RCSC-1
b.當(dāng)有通道故障時(shí),保護(hù)輸出被閉鎖。只有故障排除并按故障復(fù)位鍵后,故障狀態(tài)輸出才會(huì)被撤消,與此同時(shí)解除對(duì)保護(hù)輸出的閉鎖。
c.經(jīng)有效性診斷后,輸入信號(hào)分別進(jìn)行超限判斷。判斷項(xiàng)目為:1.是否超預(yù)報(bào)限,若超則左右分別經(jīng)2s延時(shí)后(或左右相/或0后延時(shí)2s)輸出預(yù)報(bào)信號(hào);2.是否超保護(hù)限,若超限且無故障閉鎖,則左右分別經(jīng)2s延時(shí)后(或左右相/與0后延時(shí)2s)輸出保護(hù)信號(hào)。
d. PMC676RCSC-1在延時(shí)2s期間,若預(yù)報(bào)復(fù)限則延時(shí)復(fù)歸;在延時(shí)2s期間,若保護(hù)復(fù)限或有閉鎖,則延時(shí)復(fù)歸。
PMC676RCSC-1 總結(jié)S7 300PLC繼承了西門子S系列PLC體積小,組態(tài)靈活、功能強(qiáng)大的傳統(tǒng)設(shè)計(jì)特色,非常適合機(jī)組主保護(hù)對(duì)熱工裝置的準(zhǔn)確性、可靠性、完備性的要求。用S7 300PLC構(gòu)成的保護(hù)系統(tǒng),利用其可OB35中程序流程編程特性,加強(qiáng)了保護(hù)系統(tǒng)的故障診斷邏輯功能和保護(hù)邏輯功能,特別是其保護(hù)誤動(dòng)率大大降低的特點(diǎn),遠(yuǎn)遠(yuǎn)優(yōu)于原來捷克組件那種靠繼電器硬接線實(shí)現(xiàn)保護(hù)邏輯動(dòng)作的模式。
PMC676RCSC-1
PMCE4R-3201
PMC610IND
PMCE4R-1200
PMCD3G-1300
PMC695TX-FWTCP
PMC677/LX
PMC676TX-PXE
PMC676SC-S
PMC676RCTX
POW1DRV-INT1MS
PMCF3-471
POPW-GBX460-01A
PMX-TOR1M
PMCSTARL-VXWM
PMCQ1R-300
PMCPCIM-4000A
PMCGA3-5AE9F0
PMCF3-3D0
PMCF3-371
PMCF3-330
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