ABB SA811F
PLC的基础技术的进展,主要集中在两个基本方面:执行多任务和程序互换。
所谓执行多任务,就是在一个PLC系统中可同时装几个CPU模块,每个CPU模块都执行某一种任务,控制与其所执行任务相关的I/O模块的存取。其实,按照IEC 61131-3的概念,我们应该更确切地称之为通过多配置执行多任务。例如,三菱电机的小Q系列最多可以在一个机架上插4个CPU模块;富士电机的MICREX-SX系列最多可以在一个机架上插6个CPU模块。这些CPU模块可以是专门用于逻辑控制、顺序控制的,也可以是运动控制用的,还可以是做过程控制用的,上述在Windows操作系统的环境下执行PC机任务的模块,也是供用户选择的一种选项。从某种意义上讲,这也是一种混合式的控制系统。
1 F. Q7 e' |( @/ F( E) s8 X1 q( -----------------------------------------1 F. Q7 e' |( @/ F( E) s8 X1 q( ---------------
VICKERS 737825 ELEMENT KIT LOT OF 2 NIB
AMETEK 1/4"NPT, 4000PSI, PRESSURE GAUGE 08-13-94 A3 *NE...
AMETEK 1/4"NPT, 4000PSI, PRESSURE GAUGE 08-25-04 M1 *NE...
SMC 1.0MPA, 1/8" NPT, ROTARY CLAMP MK2B25-20R
NUMATICS 8-1/2"OAL, PNEUMATIC CYLINDER 1500D02-03A, RK-...
SUN HYDRAULICS CARTRIDGE VALVE BLOCK ZBW 0B65-A2 NNB
PARKER 10S-6 PNEUMATIC CYLINDER, NIB
KIP INC ORIFICE: 3/64, VOLTS: 120/60, WATTS: 7 SOLENOID...
PARKER HYDRAULICS PF600B/4A790A METERED FLOW CONTROL VA...
PHD, PNEUMATIC CYLINDER ARF11/8X21/2-N NNB
HYDRO-LINE MFG. 3/4"NPT, ROD END COUPLER AC-2-11 NNB
PARKER 1-3/4" BUNA ROD SEAL KIT RK2AHL0171 *NEW*
PARKER NON TIE ROD CYLINDER .88NSRVY01.0 *NEW, SEALED*
BIMBA 3/4" BORE, ORIGINAL LINE CYLINDER BF-042 5-D *NEW...
FESTO 25MM BORE 10MM STROKE PNEUMATIC CYLINDER, DSNU-25...
SMC 24VDC DIRECT OPERATED POPPET SOLENOID VALVE W/ (2) ...
SMC 12 CONNECTING TUBE 4MM TUBING O.D. MULTI-CONNECTOR?,...
MAC 130B-113AAAA 110/120 VOLTS 50/60 HERTZ 150 PSI SOLE...
EATON 48X5X4 5/16 O.D. 1/4 THREAD 45° FLARE MALE CONNEC...
PARKER HYDRAULIC THREADED CARTRIDGE NEEDLE VALVE, NV101...
NUMATICS 150 PSIG, 120V PNEUMATIC VALVE 134SA400K
PARKER 1-3/4" VITON ROD SEAL KIT, RK1HDL0175 *NEW*
PARKER SINGLE LENGTH HYDRAULIC FILTER, G01284 *NEW*
PHD INC. 1" BORE 4" STROKE PNEUMATIC CYLINDER, AVB1X4
SHEFFER CORP. HYDRAULIC CYLINDER 3 1/4ATR5CR
LUBRIQUIP TRABON .035 CU.IN. MODULAR DIVIDER VALVE, MSP...
FESTO ADVU-1-1/4"-2-1?/2APA 1-1/4" DIAMETER 2-1/2" STROK...
DONALDSON SYNTEQ HYDRAULIC FILTER ELEMENT P163910 *NEW*
SWAGELOK, 1/2" TUBE FITTING, BRASS, 2500 PSI, 150oF, BA...
FESTO 150 PSI, 3/8" NPT PNEUMATIC SILENCER U-1/4 2316
ACOPIAN VB24G350 REGULATED POWER SUPPLY, NIB
OMRON 24VDC 14A DC POWER SUPPLY S82H-P30024
PHOENIX CONTACT 20/U NNB
ACME ELECTRIC 2***1-9400002-A OUTPUT POWER SUPPLY, NIB
ACOPIAN 120V 2.*** REGULATED DC POWER SUPPLY A120HT250
OMRON +5V/+12V/-12V DC POWER SUPPLY MODULE S82W-618
SIEMENS SITOP POWER 10 24V DC POWER SUPPLY 6EP1434-1SH0...
ADVANCE POWER SUPPLIES 15V 8A DC POWER SUPPLY MG15-8C
OMRON 24VDC 14A DC POWER SUPPLY S82H-P30024 *BROKEN PLA...
GRUPPO DELMAC 240W MAX SWITCHING POWER SUPPLY COD-01115...
SIEMENS SITOP POWER 30 30A 24V DC POWER SUPPLY 6EP1437-...
ACOPIAN REGULATED POWER SUPPLY A13MT800
GE CONTACTOR CL06A311M, NIB
VICOR FLATPAC POWER SUPPLYS VI-NF3-EM NIB
DEEMSTOP 110/250V POWER SUPPLY UNIT PSU-C/150
DEEMSTOP POWER SUPPLY UNIT PSU-C/150DM
NETZGERAT 24V 10A DC POWER SUPPLY EA-PSMPS 824-10 R
ELBA EURO POWER REGULATED POWER SUPPLY ESPM845812/X/DG?D...
KEYENCE 24VDC 6.0A COMPACT SWITCHING POWER SUPPLY CA-U3...
GENERAL ELECTRIC CIRCUIT BREAKER 3 POLE 800 A.MAX 600VA...
BLOCK 24V 5*** DC POWER SUPPLY SDV 480/24-55
COSEL 27A 24V DC POWER SUPPLY PAA600F-24
SEW-EURODRIVE DRS71S4FG