1756-LSP&sp;
1756-LSP&sp;
1756-LSP&sp;
PLC系統(tǒng)中的存儲(chǔ)器主要用于存放系統(tǒng)程序、用戶(hù)程序和工作狀態(tài)數(shù)據(jù)。PLC的存儲(chǔ)器包括系統(tǒng)存儲(chǔ)器和用戶(hù)存儲(chǔ)器。 &sp;
&sp; &sp; （1）系統(tǒng)存儲(chǔ)器 &sp;
&sp; &sp; 系統(tǒng)存儲(chǔ)器用來(lái)存放由PLC生產(chǎn)廠(chǎng)家編寫(xiě)的系統(tǒng)程序，并固化在ROM內(nèi)，用戶(hù)不能更改。它使PLC具有基本的功能，能夠完成PLC設(shè)計(jì)者規(guī)定的各項(xiàng)工作。系統(tǒng)程序質(zhì)量的好壞很上決定了PLC的性能。&sp;
&sp; &sp; （2）用戶(hù)存儲(chǔ)器 &sp;
&sp; &sp; 用戶(hù)存儲(chǔ)器包括用戶(hù)程序存儲(chǔ)器（程序區(qū)）和數(shù)據(jù)存儲(chǔ)器（數(shù)據(jù)區(qū)）兩部分。用戶(hù)程序存儲(chǔ)器用來(lái)存放用戶(hù)針對(duì)具體控制任務(wù)采用PLC編程語(yǔ)言編寫(xiě)的各種用戶(hù)程序。用戶(hù)程序存儲(chǔ)器根據(jù)所選用的存儲(chǔ)器單元類(lèi)型的不同（可以是RAM、EPROM或EEPROM存儲(chǔ)器），其內(nèi)容可以由用戶(hù)修改或增刪。用戶(hù)數(shù)據(jù)存儲(chǔ)器可以用來(lái)存放（記憶）用戶(hù)程序中所使用器件的ON/OFF狀態(tài)和數(shù)據(jù)等。用戶(hù)存儲(chǔ)器的大小關(guān)系到用戶(hù)程序容量的大小，是反映PLC性能的重要指標(biāo)之一。&sp;
&sp; &sp; 為了便于讀出、檢查和修改，用戶(hù)程序一般存于CMOS靜態(tài)RAM中，用鋰電池作為后備電源，以掉電時(shí)不會(huì)丟失信息。為了干擾對(duì)RAM中程序的破壞，當(dāng)用戶(hù)程序經(jīng)過(guò)運(yùn)行正常，不需要改變，可將其固化在只讀存儲(chǔ)器EPROM中?，F(xiàn)在有許多PLC直接采用EEPROM作為用戶(hù)存儲(chǔ)器。&sp;
&sp; &sp; 工作數(shù)據(jù)是PLC運(yùn)行過(guò)程中經(jīng)常變化、經(jīng)常存取的一些數(shù)據(jù)。存放在RAM中，以適應(yīng)隨機(jī)存取的要求。在PLC的工作數(shù)據(jù)存儲(chǔ)器中，設(shè)有存放輸入輸出繼電器、輔助繼電器、定時(shí)器、計(jì)數(shù)器等邏輯器件的存儲(chǔ)區(qū)，這些器件的狀態(tài)都是由用戶(hù)程序的初始設(shè)置和運(yùn)行情況而確定的。根據(jù)需要，部分?jǐn)?shù)據(jù)在掉電時(shí)用后備電池維持其現(xiàn)有的狀態(tài)，這部分在掉電時(shí)可保存數(shù)據(jù)的存儲(chǔ)區(qū)域稱(chēng)為保持?jǐn)?shù)據(jù)區(qū)。&sp;
&sp; &sp; 由于系統(tǒng)程序及工作數(shù)據(jù)與用戶(hù)無(wú)直接聯(lián)系，所以在PLC 產(chǎn)品樣本或使用手冊(cè)中所列存儲(chǔ)器的形式及容量是指用戶(hù)程序存儲(chǔ)器。當(dāng)PLC提供的用戶(hù)存儲(chǔ)器容量不夠用，許多PLC還提供有存儲(chǔ)器擴(kuò)展功能。 &sp;
&sp; &sp; 存儲(chǔ)器主要有兩種：一種是可讀/寫(xiě)操作的隨機(jī)存儲(chǔ)器RAM，另一種是只讀存儲(chǔ)器或可擦除可編程的只讀存儲(chǔ)器ROM、PROM 、EPROM 和EEPROM。&sp;
PARKER FVP48302R26B110 HYDRAULIC PUMP
PARKER PVP48302R26B110 HYDRAULIC PUMP
FANUC A16B-1212-0531/?06B PSU BI POWER SUPPLY UNIT *
ABB DSQC 236C YB560103-CC SERVO POWER UNIT *
ALLEN BRADLEY 6182-AGAZZC INTERFACE PANEL *
FANUC A16B-3200-0040/?04C MAIN CPU CONTROL BOARD
FANUC A16B-3200-0040/?04C MAIN CPU PCB W/DGHTR BRDS *
ALLEN BRADLEY 6182-AGAZZB SER A INDUSTRIAL COMPUTER
ALLEN BRADLEY 6182-CGDZZB SER A INDUSTRIAL COMPUTER
ALLEN BRADLEY 1785-L40B/E REV D01 PROCSOR MODULE
ELAU SM 100-30-080-P0-4?5-S1-B0 SERVO MOTOR
SUDMO BA S390LS SV3 CHANGEOVER VALVE MODEL 2003
ALLEN BRADLEY 1336S-BRF20-AN-?EN4 AC VARIBALE FREQ DRIVE
SUDMO HYGIENIC SHUT-OFF VALVE W/ AUATOR, NEW
STI MG46R-30-700-R-?D1-FD2 RECEIVERS, LOT OF 2, NIB
FIREYE MEC120 CHASSIS NIB
RITZ LARGE RMA END SUION PUMP, N
REXROTH7 BRUSHLS PERMANENT MAGNET MOTOR
ELAU 105/40/02/05/?19/P/R1/64/EOKN AC SERVO MOTOR
ALLEN BRADLEY 1756-OB16E/A CONTROL LOGIX DC OUTPUT NIB
SQUARE D 8736SE02S SER A SIZE 3 REVERSING STARTER
AIR FIXTUR AFAT 822-SPL AIR OPERATED TAPE DISPENSER
CARRIER 06E SEMI-HERMETIC RECIPROCATING COMPRSOR, N
FANUC A16B-2200-0660/?04A CONTROL CARD, REMAN
ALLEN BRADLEY 1770-TA PROGRAMMING TERMINAL
BRINKMANN ZS090120-M+250 IMMERSION PUMP, NIB
NIPPON GEROTOR BIDIREIONAL INDEX MOTOR, N
FANUC A16B-2200-0660/?04A CONTROL CARD, REMAN
FANUC A16B-2200-0660/?04A CONTROL CARD, REMAN
SIEMENS 6SC6100-0CA00 INPUT BOARD
SIEMENS 6SC6120-0FE00 POWER BOARD
SIEMENS 6SC6130-0FE00 SERVO DRIVE POWER BOARD
SIEMENS 6SC6120-0FE00 POWER BOARD
SIEMENS 6SC6120-0FE00 POWER BOARD
GENERAL ELERIC 75C142464-CM-G7?86-H6R-30 30 A BUS PLUG
SIEMENS 6SC6120-0FE00 POWER BOARD
PARKER D1VHW004CNYCF56 PILOT VALVE W/ MANIFOLD, N
AIR FIXTUR AFAT 822-SPL AIR OPERATED TAPE DISPENSER
SIEMENS 6SC6130-0FE00 SERVO DRIVE POWER BOARD
FANUC A16B-2200-0660/?04A CONTROL CARD, REMAN
SIEMENS 6SC6130-0FE00 SERVO DRIVE POWER BOARD
CUTLER-HAMMER KD2400F 400 AMP CIRCUIT BREAKER NIB
MAXON 6" FF 808 0 SHUT OFF VALVE NEW
FANUC A06B-0113-B0780?008 AC SERVO MOTOR
FANUC A06B-0113-B0780?008 AC SERVO MOTOR
EURODRIVE KA87 MV132S8/BMG/HR/?TH/AB8C GEAR MOTOR
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PVF SNT0 20ER 01 VANE PUMP
RACINE PVF SNT0 20A 01 VANE PUMP
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PVF SNT0 12ER 01 VANE PUMP
RACINE PSV 50 VANE PUMP
SUNDSTRAND 22-4003 HYDRAULIC PUMP
PROMS6 EMAC SERVO CONTROLLER V1.1
ABB IOS-02 / APIOS-02 I/O PROCSOR BOARD
PHD R13R 8 360-A-D-H-T ROTARY AUATOR, N
ALLEN BRADLEY 1785-L11B PLC-5/11 SER E CPU MODULE *
FANUC A06B-0315-B005#?7076 AC SERVO MOTOR *
ALLEN BRADLEY 8520-ASM3 ANALOG SERVO MODULE
NACHI RTC301 ROBOT TEACH PENDANT
ALLEN BRADLEY 709-FOD SERI K SIZE 5 CONTAOR 709-F0D
ELERO CAM PS-5121-10-M09-?H PROGRAMMABLE LIMIT SWITCH
VICKERS PVQ20-B2R-SE1S-?20-CM7-11 HYDRAULIC PISTON PUMP
VICKERS PVQ20-B2R-SE1S-?20-CM7-11 HYDRAULIC PISTON PUMP
FANUC A06B-0533-B572#?0001 AC SERVO MOTOR +
SUMTOMO QT42-25-A INTERNAL HYDRAULIC GEAR PUMP
VICKERS PVQ2-B2R-SS2892?1-CM7-12 HYDRAULIC PUMP
WATTS REPAIR KIT 4" RK 909 CK1 NIB
ROSS 3573A7852 SERPAR ELERIC SAFETY PRS VALVE
ROTAC MPJ3-41V HYDRAULIC AUATOR 1000 PSI N
ROTAC MPJ3-21V HYDRAULIC AUATOR 1000 PSI N
CONTROL TECHNIQU V75 ICD FLUX VEOR DRIVE, REFURBISH
