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L LD4 AR1+P#2.0→AR1
+ L#16 ACC1+(.._0001_0 000)
T LD4 調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 調整數據塊存儲地址指針,指向下一存儲地址
L LW0 將循環次數計數器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繼續循環;若累加
器為0,則結束
在FC100中,寄存器間接尋址指令OP NDB[LW0]使用了臨時本地數據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據與臨時變量的區別。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,可按下列形式調用FC100:
CALL FC100
PIW_Add:= 256
CH_LEN:= 6
DB_No:= 50
DBW_Addr:= 10
數據塊
數據塊定義在S7 CPU存儲器中,用戶可在存儲器中建立一個或多個數據塊。每個數據塊可大可小,但CPU對數據塊數量及數據總量有限制,如對于CPU314,用作數據塊的存儲器多為8 KB(8192 B),用戶定義的數據總量不能超出這個限制。對數據塊必須遵循先定義后使用的原則,否則,將造成系統錯誤。
1. 定義數據塊
在編程階段和運行程序中都能定義數據塊。大多數數據塊是在編程階段用STEP 7開發軟件包定義的,定義內容包括數據塊號及塊中的變量(包括變量符號名、數據類型以及初始值等),定義完成后,數據塊中變量的順序及類型決定了數據塊的數據結構,變量的數量決定了數據塊的大小。數據塊在使用前,必須作為用戶程序的一部分下載到CPU中。
ADEPT TECH/TECHNOLOG?Y 10410-00945/B 4.5M AC POWER CABLE ***NIB***
AEROTECH UNIDEX -III/20/WX2/SL?X2/4020X2 USPP UNIDEXIII20WX2?SL
Aerotech Unidex U12R-2-B/X2 Motion Controller #20287
Aerotech DR-500R Motor Motion Controller Drive Chassis for UNIDEX 500 600 DR500
AEROTECH U100S-A-40-F5/?IEEE488 UNIDEX 100 U100S
AEROTECH U100Z-160-A-F1?.8 UNIDEX 100 MOTION CONTROLLER U100Z
100 MOTION CONTROLLER U100S
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AEROTECH UNIDEX 1 MODEL U1C-SM-A-40 MOTION CONTROLLER
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U1C-SM-A-40
Aerotech Unidex II Controller with 3 Stages (LOC-N1)
Aerotech Accudex Linear XY Stage & Unidex 11 Controller, Joystick Control, X-Y
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quatro begerow endress hauser
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XYCOM EX-VIEWER-LICENSE-30
AMETEK AIR VOLUME CONTROL
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AMETEK HUNTER L-20M MECHANICAL GAGE
* AMETEK VACUUM MOTOR/BLOWER, 2M425
Ametek Tachometer/Pro?cess Time Indicator (LOC-L3)
AMETEK DIXSON TACHOMETER 0-3500 RPM W/HOUR METER24V NEW
Ametek Suspended Electrode Lot of 2
RILEY AMETEK PANALARM 50-F1 RELAY 24VDC 24V 24 VOLT VDC
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US GAUGE AMETEK 3" PRESSURE TEST GAUGE 0 - 20 PSI
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AMETEK WINDJAMMER BLOWER MOTOR 1-3/4" FILTER 551692
NEW AMETEK SOLFRUNT 1980 PROCESS GAUGE, 30-0-60 PSI
Ametek Lamb 116311-00 Vacuum Cleaner Motor Brushes
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AMK AMKaSYN AN40 Power Supply Module #6881LR
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AMK/AMKASYN 45620-9811-553?760 INVERTER DRIVE ***XLNT***
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Snap Tool Box
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XYCOM EX-VIEWER-LICENSE-30
Alfa Laval Purifier FOPX 609
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Alfa Laval Purifier MOPX 207
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