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各大老系統(tǒng)備件及停產(chǎn)備件,專門解決你找不的產(chǎn)品難題
) 臨時變量
臨時變量僅在邏輯塊運(yùn)行時有效,邏輯塊結(jié)束時存儲臨時變量的內(nèi)存被操作系統(tǒng)另行 分配。S7將臨時變量定義在L堆棧中,L堆棧是為存儲邏輯塊的臨時變量而專設(shè)的。當(dāng)塊程序運(yùn)行時,在L堆棧中建立該塊的臨時變量,一旦塊執(zhí)行結(jié)束,堆棧重新分配,因而信息丟失。
邏輯塊局部數(shù)據(jù)的數(shù)據(jù)類型
在變量聲明表中,要明確局部數(shù)據(jù)的數(shù)據(jù)類型,這樣操作系統(tǒng)才能給變量分配確定的 存儲空間。局部數(shù)據(jù)可以是基本數(shù)據(jù)類型或復(fù)式數(shù)據(jù)類型,也可以是專門用于參數(shù)傳遞 的所謂的“參數(shù)類型”。參數(shù)類型包括定時器、計數(shù)器、塊的地址或指針等,見表5.2。表5.2 參數(shù)類型變量
參數(shù)類型 大 小 說 明
定時器(Timer) 2 B 在功能塊中定義一個定時器形參,調(diào)用時賦予定時器實(shí)參
計數(shù)器(Counter) 2 B 在功能塊中定義一個計數(shù)器形參,調(diào)用時賦予計數(shù)器實(shí)參
塊:
Block_FB
Block_FC
Block_DB
Block_SDB 2 B 在功能塊中定義一個功能塊或數(shù)據(jù)塊形參變量,調(diào)用時給功能塊類或數(shù)據(jù)塊類形參賦予實(shí)際的功能塊或數(shù)據(jù)塊編號,如
FC 101、DB 42
指針(Pointer) 6 B 在功能塊中定義一個形參,該形參說明的是內(nèi)存的地址指針。例如,調(diào)用時可給形參賦予實(shí)參P#M50.0,以訪問內(nèi)存M50.0
ANY 10 B 當(dāng)實(shí)參的數(shù)據(jù)類型未知時,可以使用該類型
1) 定時器或計數(shù)器參數(shù)類型
在功能塊中定義一個定時器或計數(shù)器類型的形參,功能塊就能使用一個定時器或計數(shù)器,而不需明確具體的定時器或計數(shù)器,等到調(diào)用該功能塊時再確定定時器或計數(shù)器號。這使用戶程序能靈活性地分配和使用定時器或計數(shù)器。當(dāng)給定時器或計數(shù)器參數(shù)類型形參分配實(shí)參時,在“T”或“C”后跟一個有效整數(shù),如T 100。
2) 塊參數(shù)類型
當(dāng)定義一個作為輸入輸出的塊時,參數(shù)聲明決定了塊的類型(FB、FC、DB等)。當(dāng)為塊參數(shù)類型形參分配實(shí)參時,可以使用物理地址,如FC 101,也可使用符號地址,如“valve
3) 指針參數(shù)類型
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NEW USG SOLFRUNT AMETEK PRESSURE GAUGE 0-30 PSI SB DIAPHRAGM 316L SST
Ametek Pressure Gauge 150894 4-1/2" -30 to 60 psi
AMETEK PRESSURE TRANSMITTER 88C002A2
AMETEK FORCE GAUGE GAGE MODEL T-10P-TC WITH FIXTURE
Lamb-Ametek #116158-01 36V 5.7 2 Stage Vacuum Motor
Ametek Hunter Spring L-5 Pound Force Gauge Gaug
LAMB AMETEK VACUUM MOTOR 116378-07 120 VOLTS 50/60 HZ
Ametek USG Vacuum/Pressur?e Gauge 170878
AMETEK TAK-ETTE 1716 DIGITAL TACHOMETER TACH METER
Ametek/Lamb Electric 115334 2-Stage 7.2in Central Vacuum Motor 110in 12A 115V
AMETEK TRIM SERIES FORCE GAGE 0-50 GRAMS T-50G-TC
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AMETEK HUNTER SPRING FORCE GAUGE LO-5 80 OUNCES
V36D28L0800 REPLACES AMETEK MOTOR 116883-00 120 VOLTS
Ametek Arc-Loc Movement 0-2300 psi Solid Front Gauge
Ametek 0 - 30psi panel mount gauge 1/4" brass NPT ftg.
Ametek Vacuum Gauge V1929 / 1929
AMETEK ROTRON TUBE AXIAL FAN , PART # 011040000 , 12 VDC , 6000 RPM , NIB
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Ametek 2" P500 Utility Gauge
SV Allied Signal Aircraft Butterfly Valve, P/N 978558-2-1
AMETEK ROTRON 1/2 TRIMLINE X SERIES 1928XF 50AMP
PANALARM Ametek ACS-8 8 PIN RELAY (New)
Ametek U.S. Gauage 600 PSI
Ametek Alpha-3 Air Sampler Portable Sampling Pump
SV Allied Signal Aircraft Butterfly Valve P/N 978558-2-1
AMETEK HUNTER SPRING FORCE GAUGE LO-1M 16 OUNCES
Ametek US Gauge 1980 155008 60 psi size 4 1/2
ametek rotron 1.45amp 20000rpm 28vol fan
Lot 4 Pittman Ametek Gear Motor Actuator Screw 24V DC 65:1 Ratio 10:1 GM9413G421
AMETEK TESTER SPRING RESILIENCY WITH ACCESSORIES P/N PPH200
AMETEK USG U.S. GAUGE 30 PSI 4 1/2" GAUGE 1/4 NPT NIB
DIXSON AMETEK DC AMPERS METER BW051P BWVRR2RHY1MDLX?BX02
Ametek Power Instruments RPM Meter
Ametek Drexelbrook Sensing Element 700-0202-002
AMETEK ROTRON 48132-01 Blower Control, 5 A
USG Ametek Gauge 4-1/2" Liquid Filled
081WV10P1V1002KE
NEW USG SOLFRUNT AMETEK PRESSURE GAUGE 0-30 PSI SB DIAPHRAGM 316L SST
Ametek Pressure Gauge 150894 4-1/2" -30 to 60 psi
AMETEK PRESSURE TRANSMITTER 88C002A2
AMETEK FORCE GAUGE GAGE MODEL T-10P-TC WITH FIXTURE
Lamb-Ametek #116158-01 36V 5.7 2 Stage Vacuum Motor
Ametek Hunter Spring L-5 Pound Force Gauge Gaug
LAMB AMETEK VACUUM MOTOR 116378-07 120 VOLTS 50/60 HZ
Ametek USG Vacuum/Pressur?e Gauge 170878
AMETEK TAK-ETTE 1716 DIGITAL TACHOMETER TACH METER
Ametek/Lamb Electric 115334 2-Stage 7.2in Central Vacuum Motor 110in 12A 115V
AMETEK TRIM SERIES FORCE GAGE 0-50 GRAMS T-50G-TC
AMETEK TRIM SERIES FORCE GAGE 0-4.4 NEWTONS T-4.4N
AMETEK FORCE GAUGE GAGE MODEL T-10P-TC
AMETEK HUNTER SPRING FORCE GAUGE LO-5 80 OUNCES
V36D28L0800 REPLACES AMETEK MOTOR 116883-00 120 VOLTS
Ametek Arc-Loc Movement 0-2300 psi Solid Front Gauge
Ametek 0 - 30psi panel mount gauge 1/4" brass NPT ftg.
Ametek Vacuum Gauge V1929 / 1929
AMETEK ROTRON TUBE AXIAL FAN , PART # 011040000 , 12 VDC , 6000 RPM , NIB
Panalarm AMETEK 91AF1NL24DC4C8?GP Flasher Audible Board NIB
Ametek B/W Controls, Liquid Level Control, Indoor Use
Ametek 2" P500 Utility Gauge
SV Allied Signal Aircraft Butterfly Valve, P/N 978558-2-1
AMETEK ROTRON 1/2 TRIMLINE X SERIES 1928XF 50AMP
PANALARM Ametek ACS-8 8 PIN RELAY (New)
Ametek U.S. Gauage 600 PSI
Ametek Alpha-3 Air Sampler Portable Sampling Pump
SV Allied Signal Aircraft Butterfly Valve P/N 978558-2-1
AMETEK HUNTER SPRING FORCE GAUGE LO-1M 16 OUNCES
Ametek US Gauge 1980 155008 60 psi size 4 1/2
ametek rotron 1.45amp 20000rpm 28vol fan
Lot 4 Pittman Ametek Gear Motor Actuator Screw 24V DC 65:1 Ratio 10:1 GM9413G421
AMETEK TESTER SPRING RESILIENCY WITH ACCESSORIES P/N PPH200
AMETEK USG U.S. GAUGE 30 PSI 4 1/2" GAUGE 1/4 NPT NIB
DIXSON AMETEK DC AMPERS METER BW051P BWVRR2RHY1MDLX?BX02
Ametek Power Instruments RPM Meter
Ametek Drexelbrook Sensing Element 700-0202-002
AMETEK ROTRON 48132-01 Blower Control, 5 A
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Ametek US Gauge Series 1900 0-60PSI Pressure Gauge NR
Ametek US Gauge Series 1900 Solfrunt Pressure Gauge NR
Ametek IPS-200 Pressure Switch -100 to +200 kPa
AMETEK GAUGE PT-1088 144435
NEW - Lot of 4 - Ametek 0 to 100/60 PSI Pressure Gauges
NCC Ametek #LNC-05SBL-445 240 vac Pump-Up Liquid Level Sensor
AMETEK P550LX 3000 PSI 1/4 ANPT LIQUID FILLED U.S. GAUGE, NEW
SAW-4601 *NEW* OE Solenoid for Ametek, Prestolite 6V
(2) Ametek U.S. Gauge USG Air Pressure Gauge 46778 2" P-500 1/4" LM 300# NEW
Lot 4 3 New 1 Used Ametek US Gauge 0-3000 psi 1/4 ANPT
AMETEK DUPONT S2204 FILTER KIT QTY (5) NEW
AMETEK, 5105, PRESSURE GAUGE, 160 PSI, 1/4" NPT, 0-160 RANGE, NIB
AMETEK/HUNTER SPRING TRIM FORGE GAGE T-1000G-TC - NEW
Ametek Lamb 116271-00 AC/DC Vacuum Motor Blower, 1 Stage, Peripheral
6600-1040 *NEW* Solenoid for Prestolite, Ametek 12V
AMETEK LAMB 116884-49 BLOWER / VACUUM MOTOR
AMETEK Rotron air Filter assembly part # 516489 NNB
Lamb Ametek 116455-50 1-stage 5.7" Vacuum Motor 120 volt
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
Prestolite Ametek Starter Solenoid 12 Volt 3 Terminal
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Tak-Ette Digital Tachometer 1707 and Ametek Surface Speed Wheel
New Ametek 2.5" Pressure Gauge 0-100 H2O 161965
Ametek USG Gauge H20 0-15 Pressure Gauge 161963 NEW
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Ametek U.S. Gauge HG VAC 200 PSI Dial No. 33024
New Ametek U.S. Gauge USG Dial Thermometer Dial: 2 1/4" -20 to 120F
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New Ametek 3.5" Pressure Gauge 0-60 PSI P844U
Ametek 162787 1/4NPT 0-60 PSI
1 NEW AMETEK BU-2457-H PRESSURE GAGE NIB
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2523 NEW AMETEK Pressure Gauge 0-30psi
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AMETEK 4" 0/30 PSI WITH HIGH PRESSURE FITTING.
081WV10P1V1002KE
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