1771-A1B
1771-A1B
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PLC在數(shù)控機床中的工作流程,和通常的PLC工作流程基本上是*的,分為以下幾個步驟:
(1).輸入采樣:輸入采樣,就是PLC以順序掃描的方式讀入所有輸入端口的信號狀態(tài),并將此狀態(tài),讀入到輸入映象寄存器中。當(dāng)然,在程序運行周期中這些信號狀態(tài)是不會變化的,除非一個新的掃描周期的到來,并且原來端口信號狀態(tài)已經(jīng)改變,讀到輸入映象寄存器的信號狀態(tài)才會發(fā)生變化。
(2)、程序執(zhí)行:程序執(zhí)行階段系統(tǒng)會對程序進行特定順序的掃描,并且同時讀入輸入映像寄存區(qū)、輸出映像寄存區(qū)的讀取相關(guān)數(shù)據(jù),在進行相關(guān)運算后,將運算結(jié)果存入輸出映像寄存區(qū)供輸出和下次運行使用。
(3)、出刷新階段:在所指令執(zhí)行完成后,輸出映像寄存區(qū)的所有輸出繼電器的狀態(tài)(接通/斷開)在輸出刷新階段轉(zhuǎn)存到輸出鎖存器中,通過特定方式輸出,驅(qū)動外部負載。
NUMATICS ACTUATOR PNEUMATIC VALVE REPAIR KIT, N98-2190 *NEW*
SMC 24VDC DOUBLE SOLENOID VALVE VQ7-6-FG-D-3Z
SMC 0.2-1.0MPA SOLENID VALVE VQ7-6-FJG-D-3ZR
KUNKLE VALVE DIVISION 50 PSIG 1-1/2" NPT RELIEF VALVE, 537-G01-HM *NEW*
INLINE INDUSTRIES 1000WOG 3/8" SS BALL VALVE CF8M
TRANSPAK 3-15PSIG 4-20MA 10-90V 1/4" SOLENOID VALVE TP690-001 105402
JAMESBURY INC. SEAL REPAIR KIT RKF5TT NIB
VELAN 1" 1975PSIG@100°F MODEL-A GLOBE VALVE A105N / S-2074B-02TY
FESTO CPV10-VI M302 CPV10-GE-ASI-8E?8A-Z-M8 MANIFOLD W/ (1) 185 880 R302
FESTO CPV10-VI M302 CPV10-GE-ASI-8E?8A-Z-M8 MANIFOLD W/ (1) 185 880 R202
MANNESMANN REXROTH 4WE10D31/CG24N9?Z55L SOLENOID VALVE
VICKERS DIRECTIONAL SOLENOID CONTROL VALVE DG4V-3-23A-M-P7?-H-7-52
LADISH 3/4" 150 DIRECTIONAL VALVE 0701-314
SMC 0-1.0MPA 24VDC 2-POSITION SINGLE VALVE MANIFOLD, VQC4101R-5 *NEW*
ITT FABRI-VALVE 150 CWP S316 8" KNIFE GATE VALVE F440732
RELIANCE P18G4059C FRAME 184TC 3PH 230/460V 3500RPM 5HP MOTOR 01BG96507401G 1 XY
BURKERT 125925E 24V 2W NEW
ALCO CONTROLS 120V 17/12W SOLENOID VALVE COIL 023-0039-01 *NEW*
REXROTH HYDRAULIC DIRECTIONAL VALVE Z4WE 6 W68-30/EG24K4/V
RUGGLES-KLINGEM?ANN 1/2" SOLENOID VALVE 229-A
FESTO CPV10-VI U502 CPV10-GE-ASI-8E?8A-Z-M8 MANIFOLD W/ (5) 161 368 U402
FESTO CPV10-VI U202 CPV10-GE-ASI-8E?8A-Z-M8 MANIFOLD W/ (5) 161 368 TD02
FESTO CPV10-VI M302 CPV10-GE-ASI-8E?8A-Z-M8 MANIFOLD W/ (2) 185 880 L702
FLOWSERVE * ACTUATOR VALVE W/ ASCO SOLENOID VALVE * B100S10
NUMATICS 24VDC 0.5W 100 PSIG SOLENOID VALVE, R22BBAZ4MK00061 *NEW*
SMC SOLENOID VALVE NIB SYK3143-6LOZ 99412
JAMESBURY 150PSI ACTUATOR ST-400 B W/ 6" CF8M VALVE 5152W-31-3600TS?-1
NIBCO BRONZE BALL VALVE, ? TURN ?" NPT END CONNECTION, NEW
SIZE 3 CLASS 150 SS316 KNIFE VALVE L10-0320C-13BL