2711P-B10C4A8【】2711P-B10C4A8
2711P-B10C4A8梯形圖編程語(yǔ)言：在繼電器控制線路的基礎(chǔ)上簡(jiǎn)化了符號(hào)演變而來(lái)（圖形編程）。梯形圖具有形象、直觀、實(shí)用、電氣人員容易接受的特點(diǎn)，是目前用得最多的一種plc編程語(yǔ)言。
繼電器原理圖與梯形圖中所用圖符的對(duì)比關(guān)系
使用安全PLC/DCS 及安全網(wǎng)絡(luò)的優(yōu)點(diǎn)包括:
1 機(jī)械控制更大的集成性和靈活性
2 當(dāng)標(biāo)準(zhǔn)控制層智能化時(shí)，能夠進(jìn)行更好更容易的故障診斷
3 更快、更方便的維護(hù)
4 減少安裝、調(diào)試以及重新配置的費(fèi)用
5 與對(duì)于邏輯單獨(dú)使用安全繼電器相比，降低了設(shè)計(jì)和硬件成本
例1：根據(jù)下列繼電器原理圖畫(huà)出梯形圖。
1）常開(kāi)按鈕SB2、SB3接輸入繼電器X1、X2：
2）常閉SB1接輸入繼電器X0：
3）線圈KM1、KM2接輸出繼電器Y0、Y1。
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