ZDRK-6VP5-11/50YMV/12現(xiàn)貨
福州聚福興給你一個新的體驗
IEI POS-478板上集成 Intel 845G/GV圖形顯示控制器,幀緩存采用DVMT共享系統(tǒng)主存儲器的方式。功能方面,它支持CRT以及TFT/DSTN LCD雙顯示屏幕功能,幷且高分辨率能夠達到2047×1536,完全滿足商業(yè)POS系統(tǒng)新3D圖形顯示性能的需求。使用IEI POS-478開發(fā)POS機,其POS機可實現(xiàn)播放3D動畫或企業(yè)宣傳片等高階應用。電源方面,IEI POS-478的要求相當?shù)停鲜降腁T電源也行,ATX電源也可以,因為它提供了AT、ATA兩種電源接口。
串口數(shù)量的多少是衡量POS主板擴展性能的重要方面, 因為POS系統(tǒng)應用多、擴展性能強大的,很多輸入、輸出設備是通過串口與POS系統(tǒng)主機進行通訊。IEI POS-478因定位于POS行業(yè), 所以在POS系統(tǒng)應用多的串口設計特別加強。IEI POS-478提供4個串口,可同時支持4個串行設備幷行工作,此外IEI POS-478還提供業(yè)界獨有的6個USB2.0(通用串行總線)接口, 毫無疑問其對于外接設備應用多的POS機, 其擴展性能是相當?shù)?。此外,POS-478提供2個并行口, 2個ATA-133 IDE接口, 2個Serial ATA接口, 1個FDD接口,一個RJ45 10/100MB以太網(wǎng)絡接口,擴展能力相當強大。
更值得一提的是,IEI POS-478提供WatchDog Timer(看門狗),資料的安全得到了有力的保障。此外,它還提供1個32 bit PCI插槽,支持各種基于PCI總線設備,如顯示卡、網(wǎng)卡、聲卡、Modem等,便于日后升級或擴充。
IEI POS-478結構緊湊,整合度非常高,集成CPU、顯卡、網(wǎng)卡、聲卡,接口相當豐富,涵蓋了POS系統(tǒng)所需要的各種設備接口,完全能夠滿足POS行業(yè)用戶的需求,符合POS系統(tǒng)長時間不間斷工作的應用特點??傊琍OS行業(yè)用戶所追求的穩(wěn)定、易用、安全,完全可以在IIE POS-478上得到實現(xiàn)。
L LD4 AR1+P#2.0→AR1
+ L#16 ACC1+(.._0001_0 000)
T LD4 調(diào)整模入模塊地址指針,指向下一通道Acc1+(bb bbbb bxxx)
L LD8
+ L#16
T LD8 調(diào)整數(shù)據(jù)塊存儲地址指針,指向下一存儲地址
L LW0 將循環(huán)次數(shù)計數(shù)器LW0的值裝入累加器1
LOOP NEXT 若累加器1的值不為0,將累加器減1繼續(xù)循環(huán);若累加
器為0,則結束
在FC100中,寄存器間接尋址指令OP NDB[LW0]使用了臨時本地數(shù)據(jù)LW0,變量表中定義的臨時變量雖然也在L堆棧中,但不能用于存儲器間接尋址,從這里也可看出臨時本地數(shù)據(jù)與臨時變量的區(qū)別。程序中LW2、LD4和LD8起的作用也可用臨時變量替代。
下面舉例說明如何使用FC100。在某應用中,機架0的4號槽位安裝了一個8模入模塊(地址256開始),若要將前6個模入模塊信號讀回,存入DB50.DBW10開始的6個字單元中,可按下列形式調(diào)用FC100:
CALL FC100
PIW_Add:= 256
CH_LEN:= 6
DB_No:= 50
DBW_Addr:= 10
數(shù)據(jù)塊
數(shù)據(jù)塊定義在S7 CPU存儲器中,用戶可在存儲器中建立一個或多個數(shù)據(jù)塊。每個數(shù)據(jù)塊可大可小,但CPU對數(shù)據(jù)塊數(shù)量及數(shù)據(jù)總量有限制,如對于CPU314,用作數(shù)據(jù)塊的存儲器多為8 KB(8192 B),用戶定義的數(shù)據(jù)總量不能超出這個限制。對數(shù)據(jù)塊必須遵循先定義后使用的原則,否則,將造成系統(tǒng)錯誤。
1. 定義數(shù)據(jù)塊
在編程階段和運行程序中都能定義數(shù)據(jù)塊。大多數(shù)數(shù)據(jù)塊是在編程階段用STEP 7開發(fā)軟件包定義的,定義內(nèi)容包括數(shù)據(jù)塊號及塊中的變量(包括變量符號名、數(shù)據(jù)類型以及初始值等),定義完成后,數(shù)據(jù)塊中變量的順序及類型決定了數(shù)據(jù)塊的數(shù)據(jù)結構,變量的數(shù)量決定了數(shù)據(jù)塊的大小。數(shù)據(jù)塊在使用前,必須作為用戶程序的一部分下載到CPU中。
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Ametek US Gauge Series 1900 Solfrunt Pressure Gauge NR
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NEW - Lot of 4 - Ametek 0 to 100/60 PSI Pressure Gauges
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Ametek Thermometer 20-200f 142024 us gauge fahrenheit f
NEW AMETEK THERMOMETER 8544-152138181 50/350F 10FT
Ametek U.S. Gauge 0-300psi Pressure Test Gauge Stainless Case 4.5" Dial No 33207
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Tak-Ette Digital Tachometer 1707 and Ametek Surface Speed Wheel
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ZDRK-6VP5-11/50YMV/12
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Imaging Tech. IM-VME-ADEPT R-B1 L1 VME
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ZDRK-6VP5-11/50YMV/12
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Acuity CiMatrix CM4000 B/W CCD Camera, super miniture
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ZDRK-6VP5-11/50YMV/12