PLC是采用“顺序扫描，不断循环”的方式进行工作的。即在PLC运行时，CPU根据用户按控制要求编制好并存于用户存储器中的程序，按指令步序号（或地址号）作周期性循环扫描，如无跳转指令，则从条指令开始逐条顺序执行用户程序，直至程序结束。然后重新返回条指令，开始下一轮新的扫描。在每次扫描过程中，还要完成对输入信号的采样和对输出状态的刷新等工作。
福州卓凯电子科技有限公司联系人：林女士
公司地址：福州市闽侯西江滨大道77号正荣润园一号楼1205室
主营：世界的PLC 、DCS 系统备件 模块
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Phoenix 5605011 PPC Raid 40GB HDD w/ Carrier T6
PHOENIX CONACT IB STME 24 DO 16/3 INTERBUS TERMINAL MODULE B11
PHOENIX CONTACT 5521241 National Instruments FLKM-50 IN BOX C4
PHOENIX CONTACT 5602192 EM-DUO-120/20/GFI CIRCUIT BREAKER LOT OF 2 (Q5)
PHOENIX CONTACT 5602192 EM-DUO-120/20/GFI CIRCUIT BREAKER LOT OF 2 (Q5)
PHOENIX CONTACT IB ST 24 DI 16/4 INTERBUS TERMINAL MODULE B11
PHOENIX CONTACT IB ST 24 DO 16/3 INTERBUS TERMINAL MODULE B11
PHOENIX CONTACT IB ST 24 DO 16/3 INTERBUS TERMINAL MODULE B11
PHOENIX CONTACT IB ST 24 DO 16/3 INTERBUS TERMINAL MODULE B11
PHOENIX CONTACT IBS IP 24 V.24 INTERBUS COMMUNICATION MODULE T6
Phoenix Contact IBS ST 24 BKM-T Interbus-S Bus Terminal Module Nice T6
Phoenix Contact IBS ST 24 BKM-T Interbus-S Bus Terminal Module Nice T6
PHOENIX CONTACT IBS STME 24 BK RB-T BUS COUPLER B11
PHOENIX CONTACT IBS STME 24 BK RB-T BUS COUPLER B11
Phoenix Contact Interbus IB STME 24 DIO 8/8/3-2A B11
Phoenix Contact Interbus Input Module IB STME 24 DI 16/4 B11
PHOENIX CONTACT MINI-PS-100-240AC/2X15DC/1 POWER SUPPLY T6
Phoenix Contact Monitor Model DV-OPC5515 016-BD E.00 NICE (M7-31)
Phoenix Contact Monitor Model DV-OPC5515 019-BC A.00 / 2875068 (B18)
Phoenix Contact Monitor Model DV-OPC5515 019-BC A.02 / 2875068 (M7-37)
PHOENIX CONTACT PLUGTRAB PT 2-PE/S 24AC-ST NICE (T6)
PHOENIX CONTACT QUINT- BAT/24DC/ 7.2AH - 2866352 BATTERY STORAGE T6
Phoenix IBS L2 IP 24 BK-T InterBus Module 2732376 C39
Phoenix Interbus Contact IB STME 24 DI 16/4 Nice
Phoenix Interbus Contact IB STME 24 DI 16/4 Nice
PHOENIX SAFETY RELAY PSR-SCP-24UC/URM4/5X1/2X2 USED
PIAB 2061 VT-1AM-ISI VACTRAP VALVE W/ SWIVEL ARM & OB65X170 SUCTION CUP S2
PIAB 2061 VT-1AM-ISI VACTRAP VALVE W/ SWIVEL ARM & OB65X170 SUCTION CUP S2
PIAB 3116064 Vacuum Switch NO BOX A14
PIAB PNP NONC DM8 Vacuum Switch Brand in Box C2
PIAB PNP NONC DM8 Vacuum Switch Brand in Box C2
PILZ PN0Z1 24VDC 3S10 SAFETY RELAY (M5)
PILZ PNOZ 3 24VDC 5S10 SAFETY RELAY (A30)
PILZ PNOZ X10 230-240VAC / 6N/O 4N/C 3LED SAFETY RELAY IN BOX B3
Pilz PNOZ X10.1 24VDC 6n/o 4n/c 6LED Safety Relay (M4)
Pilz PNOZ1-24VAC-3S10 Safety Relay (M4)
Pilz PNOZ1-24VAC-3S10 Safety Relay (M4)
PILZ PZE X4 24V DC 4N/O Safety Relay (M5)
Pilz PZE X4P 24VDC 4n/o Relay Nice (M4)
Pinnacle Microguard 36" Light Curtain Set MG-36-OF-AU-24VDC H8
Plast-O-Matic BSR050V-NC-PV Auto Shutoff Valve 1/2" PVC In Box (B2)
PMI Precision Ball Screw 28" Length Unknown Model T5
Portwell Backplane Board PBP-14P4 R2M2E0 C56
Portwell Backplane Board PBP-14P4 R2M2E0 C56
POTTER BRUMFIELD CKH-38-30010 RELAY TIME DELAY Q3
POWELL VALVE 2490 1/4" GATE VALVE 200 1/4" (I4)
Power Team SPX 9613 PUMP AIR CONTROL VALVE Q2
Power-One International Series HB24-1.2-A Power Supply 24 VDC Nice (Q3)
PRECISION XY STAGE TURNTABLE OPTICS LASER OPTICAL (B07)
Process Equipment Co SK15S Control Board Nice Rexroth (C42)
Process Equipment Co SK15S Control Board Nice Rexroth (C42)
Process Equipment Co SV2A Control Board Nice Rexroth C27
Process Equipment Co Test Points Control Board Nice Rexroth (C42)
Process Equipment Co Test Points Control Board Nice Rexroth (C42)
Process Equipment Co Test Points Control Board Nice Rexroth (C42)
Process Equipment Co VCR6 Control Board Nice Rexroth (C42)
Process Equipment Co VS3A Control Board Nice Rexroth (C3)
PRODUCTION SERVICE E150 FEEDER CONTROL (A35)
PRO-FOLD BINDING ELECTRIC ER FOLDER PRO FOLD FOLDING (B)
Prolinx Prosoft 5310-MBP-RIO Version 2.45 (A30)
ProMeasure Corporation Pro Series II PSIIH11UH13032773 (B02)
Promess 50mm Electronic Indicator 5007130501 & Cable 0701210005 No Box Q7
Promess 50mm Electronic Indicator 5007130501 & Cable 0701210005 No Box Q7
Promess 50mm Electronic Indicator 5007130501 & Cable 0701210005 No Box Q7
PROTECTOSEAL 522 BARREL DRUM SAFETY VENT NO BOX (A33)
PROTECTOSEAL 522 BARREL DRUM SAFETY VENT NO BOX (A33)
PRX GENERAL ELECTRIC 336A3401AA G04 SCR ASSEMBLY SEMICONDUCTOR DIODE Q4
PRX GENERAL ELECTRIC 336A3401AA G04 SCR ASSEMBLY SEMICONDUCTOR DIODE Q4
PSYTRONICS TRANSIENT VOLTAGE SURGE SUPPRESSOR P2401D NICE A14
PSYTRONICS TRANSIENT VOLTAGE SURGE SUPPRESSOR P2401D NICE A14
QASS CiS 0.1 CRACK DETECTION SYSTEM (M6-1)
QTECH OSCILLATOR CARD QTECH 030 C56
QTECH ZERO CARD QTECH 029 C56
QTY 25 PARKER BRASS MALE CONNECTOR 3/8" TUBE 68C-6-4 IN BOX H2
QUALITEST TIME TA220S Microprinter for TR100/200 Roughness Tester NICE Q3
QUALITY BUILT PURE ENERGY MPA 15607 ALTERNATOR REFURBISHED (I1)
QUANTEL PU430 POWER SUPPLY PU 430 FOR PARTS (8C)
QUICK IMAGE FLASH CONTROL II ULTRA-FAST 2X2 CHANNEL LED STROBE CONTROLLER CHEAP
Radio Touch Probe M & H Inprocess 25.00 HDR CAT 50 P5
RAYLOR HP C8061XC LASERJET 4100 TONER WITH CLIP (S8)
Raymond 11 PC Board Assy In Box C15
Raymond 11 PC Board Assy In Box C15
Raymond 1 B Module Assembly NO BOX C15
Raymond 5 Coil assembly No Box C15
RAYMOND 570-431-201 ELECTRIC 36V DC MOTOR PRESTOLITE MLY-4001 REFURBISHED (19G)
Raymond Corp 170-002-551 Circuit Board C15
Raymond Corp PC Board 1R C15
Raymond Corp. 154-005-354 PC Board C15
