1756-OW16I/AB智能制造
型PLC的程序結(jié)構(gòu) 這些PLC的用戶程序由主程序、子程序和中斷程序組成。在每一個(gè)掃描循環(huán)周期,CPU都要調(diào)用一次主程序。主程序可以調(diào)用子程序,小型 控制系統(tǒng) 可以只有主程序。中斷程序用于快速響應(yīng)
下面介紹幾種常見的PLC的程序結(jié)構(gòu)及其特點(diǎn):
1.某些國外的小型PLC的程序結(jié)構(gòu)
這些PLC的用戶程序由主程序、子程序和中斷程序組成。在每一個(gè)掃描循環(huán)周期,CPU都要調(diào)用一次主程序。主程序可以調(diào)用子程序,小型控制系統(tǒng)可以只有主程序。中斷程序用于快速響應(yīng)中斷事件。在中斷事件
發(fā)生時(shí),CPU將停止執(zhí)行當(dāng)時(shí)正在處理的程序或任務(wù),去執(zhí)行用戶編寫的中斷程序。執(zhí)行完中斷程序后,繼續(xù)執(zhí)行被暫停執(zhí)行的程序或任務(wù)。它們的子程序和中斷程序沒有局部變量,子程序沒有輸入、輸出參數(shù)。
1756-OW16I/AB智能制造
1756-OA16 74-265 VAC OUTPUT 16PTS
1756-OA16I 74-265 VAC ISOLATED OUTPUT 16PTS
1756-OA8 74-265 VAC 2 AMP OUTPUT 8PTS
1756-OA8D 74-132 VAC DIAGNOSTIC OUTPUT 8PTS
1756-OA8E 74-132 VAC ELEC FUSED 2A OUTPUT 8PTS
1756-OB16D 19-30 VDC DIAGNOSTIC OUTPUT 16PTS
1756-OB16E VDC ELEC FUSED OUTPUT 16PTS
1756-OB16I VDC ISOLATED OUTPUT 16PTS
1756-OB32 VDC OUTPUT 32PTS
1756-OB8 VDC 2 AMP OUTPUT 8PTS
1756-OB8EI VDC ISOLATED ELEC FUSED OUTPUT 8PTS
1756-OC8 VDC 2 AMP OUTPUT 8PTS
1756-OF4 ANALOG OUTPUT
1756-OF6CI ISOLATED ANALOG INPUT-CURRENT/VOLTAGE 6PTS
1756-OF6VI ISOLATED ANALOG INPUT-CURRENT/VOLTAGE 6PTS
1756-OF8 ISOLATED ANALOG INPUT-CURRENT/VOLTAGE 8PTS
1756-OH8I VDC ISOLATED 2 AMP OUTPUT 8PTS
1756-ON8 VAC 2 AMP OUTPUT 8 PTS
1756-OV16E VDC ELEC FUSED SINKING OUTPUT 16PT
1756-OW16I N.O. ISOLATED RELAY OUTPUT 16PTS
1756-OX8I N.O./N.C. ISOLATED RELAY OUTPUT 6PTS
1756-PA72 VAC POWER SUPPLY
1756-PA75 VAC POWER SUPPLY
1756-PB72 VDC POWER SUPPLY
1756-PB75 VDC POWER SUPPLY
1756-PLS PROGRAMMABLE LIMIT SWITCH MODULE
1756-TBCH 36 PIN SCREW CLAMP BLOCK W/STANDING HOUSING
1756-TBE EXTENDED DEPTH TERMINAL BLOCK HOUSING
1756-TBNH 20 POSITION NEMA SCREW CLAMP BLOCK
1756-TBS6H SPRING CLAMP BLOCK
1756-TBSH SPRING CLAMP BLOCK
1756-TCO2 INTERFACE TRANSCEIVER CABLE
1756-TC15 INTERFACE TRANSCEIVER CABLE