PCLD-789
Hewlett Packard 2102C ECC Control Board 02102-69103
Hewlett - Packard HP G60 T4300 500 GB Notebook PC
HP 86235A 1.7 - 4.3 GHz Microwave Oscillator RF Plug in HEWLETT PACKARD HP8620
Hewlett Packard 83220E GSM/DCS/PCS RF Interface
HP hewlett Packard 6438B DC Power Supply 0-60V & 0-5A
HEWLETT PACKARD A7346A FC 1GB/2GB ENTRY SWITCH 8B
HEWLETT PACKARD IB EXTENDER MODEL # 37201A WITH CABLES
Hewlett Packard HP 771 CE037A Matte Black 775ml ( brand new )
Hewlett Packard Cf031a Cyan Cartridge Laserjet Cm4540 Toner Mfp Genuine OEM HP
Hewlett Packard Cf032a Yellow Cartridge Laserjet Toner Cm4540 Mfp, OEM, Genuine
Hewlett Packard Officejet Pro 8600 Plus e-All-in-One Wireless Color Printer
886111607327, New, USA Warranty, Authorized HP Dealer
Hewlett Packard 447983-001 Hp Pavilion Sys Brd W/ 256mb Vid Me
HEWLETT PACKARD LM975A8#ABA ZR2040W 20IN (16:9) WLED IPS FIXED HEIGHT DISPLAY UP
HEWLETT PACKARD TEST & MEASURE 5185-0417 USPP 51850417
Hewlett Packard HP 8904A Generator Test Set
Hewlett Packard 444002-001 Hp Pavilion Dv9410us Sys Brd (ff) (
HEWLETT PACKARD TEST & MEASURE 436A USPP 436A
HEWLETT PACKARD HP VP6120 VP6100 VP6110 L1624A PROJECTOR LAMP BULB PB8120 PB8220
Hewlett Packard A5599A Hp Dlt8000 Scsi-hvd Loader Ready
Hewlett Packard A3724-60101 Surestore E Hub S10
Hewlett Packard 8694B BWO Module For 8690 Oscillator
Hewlett Packard 615849-001 Hp Uma Laptop System Board
Hewlett Packard 459567-001 Hp Pavilion Dv9500 Laptop Sys Brd (
Hewlett Packard 448598-001 Hp Pavilion Dv2500 System Board
Hewlett-Packard KC119UP#ABA-B6 Hewlett-Packard.Mobile Business Notebook - 8510p
HP Advantage LA1951G 19" LCD Monitor - 5:4 - 5 ms EM890A8#ABA
Hewlett Packard 9885S Flexible Disk Drive HP Works
Classic Hewlett Packard HP-97 Scientific RPN Calculator Card Reader & Printer
Hewlett Packard Officejet Pro 8600 Plus e-All-in-One Wireless Color Printer
886111607327, New, USA Warranty, Authorized HP Dealer
Hewlett-Packard FK182AT#ABA FK182AT Cash Drawer - Printer Driven
HEWLETT PACKARD TEST & MEASURE 6110 USPP 6110
HEWLETT PACKARD TEST & MEASURE 6220B USPP 6220B
問:西門子PLC梯形圖和指令表相互轉(zhuǎn)換有哪位朋友知道???還有西門子S7-300里的各個數(shù)據(jù)存儲單元有哪些,分別是存儲什么數(shù)據(jù)的?
答:一般你在編輯程序快時,如在插入一個快時,在SIAMTIC管理器中,選定菜單“Insert(插入)/S7 Block(S7塊)/Organization Block時,其中就有選項”Created in language”(選擇編程語言,LAD/STL/FBD),選定編程語言后,你的程序語言就確定了;當然,你也可以在打開的程序快(LAD/STL/FBD編輯器)中通過菜單View(查看)在三種編程語言(在LAD(梯形圖)、STL(語句表)和FBD(功能塊圖))之間切換;
STEP7支持LAD/STL/FBD這所種語言的混合編程以及相互之間的轉(zhuǎn)換。一般來說LAD和FBD程序都可以通過STEP7自動轉(zhuǎn)換為STL語言,但是并非所有的STL語言都可以轉(zhuǎn)換為LAD和FBD。
S7-300PLC的存儲區(qū)除有三個基本存儲單元(系統(tǒng)存儲器、裝載存儲區(qū)和工作存儲區(qū))外,還有外設(shè)I/O存儲區(qū)(直接訪問本地的和分布式的輸入和輸出模擬量模塊)、累加器(ACCU1和ACCU2)、地址寄存器(AR1、AR2)、數(shù)據(jù)塊地址存儲器(打開共享數(shù)據(jù)塊DB和打開背景數(shù)據(jù)塊DI)和狀態(tài)字寄存器(16個狀態(tài)位),其中三個基本存儲區(qū)儲存的數(shù)據(jù)如下:
系統(tǒng)存儲區(qū):數(shù)字量輸入/輸出過程映像寄存器I/Q、位存儲區(qū)(根據(jù)CPU的型號大小不同)、定時器T和計算器C;
工作存儲區(qū):存放CPU運行時執(zhí)行的用戶程序和數(shù)據(jù)(邏輯快OB/FB/FC、數(shù)據(jù)塊DB)、臨時本地數(shù)據(jù)存儲區(qū)(L堆棧);
裝載存儲區(qū):動態(tài)裝載存儲區(qū)RAM(存放用戶程序)、可選的內(nèi)置的固定裝載存儲區(qū)(FEPROM),用于保存不包含符號地址和注釋的用戶程序和系統(tǒng)數(shù)據(jù)(組態(tài)、連接和模塊參數(shù)等)
廈門潤星貿(mào)易有限公司
聯(lián)系人:吳偉杰
QQ:2563095702
郵箱:2563095702@qq.com
電話:0592-6895320
手機:18030263579
傳真:0592-6034581〔備注吳偉杰收〕