SGM-08U3B4L現(xiàn)貨

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如果確實需要，還可以在程序運行中動態(tài)定義一個數(shù)據(jù)塊。動態(tài)定義時，數(shù)據(jù)塊號是自動產(chǎn)生的，數(shù)據(jù)塊在存儲器中的位置是動態(tài)分配的。由于要定義的數(shù)據(jù)塊有可能大于CPU存儲器(用于數(shù)據(jù)塊的部分)的剩余空間，因此動態(tài)定義過程有可能失敗
2．訪問數(shù)據(jù)塊
在用戶程序中可能定義了許多數(shù)據(jù)塊，而每個數(shù)據(jù)塊中又有許多不同類型的數(shù)據(jù)，因此，訪問時需要明確數(shù)據(jù)塊號和數(shù)據(jù)塊中的數(shù)據(jù)類型與位置。根據(jù)明確數(shù)據(jù)塊號的不同方法，可以用多種方法訪問數(shù)據(jù)塊中的數(shù)據(jù)。
直接在訪問指令中寫明數(shù)據(jù)塊號，如：
L DB5.DBW10
T DB10.DBW20
L Motor_1.Speed 符號地址
另一種方法是“先打開后訪問”。在訪問某數(shù)據(jù)塊中的數(shù)據(jù)前，先“打開”這個數(shù)據(jù)塊，也就是將數(shù)據(jù)塊號(數(shù)據(jù)塊的起始地址)裝入數(shù)據(jù)塊寄存器。這樣，存放在數(shù)據(jù)塊中的數(shù)據(jù)就可利用數(shù)據(jù)塊起始地址加偏移量的方法來訪問。如：
OPN DB5
L DBW10
OPN DB10
T DBW20
在打開一個數(shù)據(jù)塊時，先打開的數(shù)據(jù)塊會自動關(guān)閉(沒有專門的數(shù)據(jù)塊關(guān)閉指令)。由于有兩個數(shù)據(jù)塊寄存器(DB和DI寄存器)，因此，多可同時打開兩個數(shù)據(jù)塊。一個作為背景數(shù)據(jù)塊，數(shù)據(jù)塊的起始地址存儲在DI寄存器中；另一個作為共享數(shù)據(jù)塊，數(shù)據(jù)塊的起始地址存儲在DB寄存器中。打開背景數(shù)據(jù)塊，在調(diào)用FB時可以自動實現(xiàn)。由于調(diào)用FB時使用DI寄存器，因此，一般不在FB程序中用OPN DI n指令打開數(shù)據(jù)塊。
3. 背景數(shù)據(jù)塊和共享數(shù)據(jù)塊
背景數(shù)據(jù)塊和共享數(shù)據(jù)塊有不同的用途。任何FB、FC或OB均可讀寫存放在共享數(shù)據(jù)塊中的數(shù)據(jù)。背景數(shù)據(jù)塊是FB運行時的工作存儲區(qū)，它存放FB的部分運行變量。調(diào)用FB時，必須指定一個相關(guān)的背景數(shù)據(jù)塊。作為規(guī)則，只有FB塊才能訪問存放在背景數(shù)據(jù)塊中的數(shù)據(jù)。
一般情況下，每個FB都有一個對應的背景數(shù)據(jù)塊，一個FB也可以使用不同的背景數(shù)據(jù)塊。如果幾個FB需要的背景數(shù)據(jù)完全相同，為節(jié)省存儲器，則可以定義成一個背景數(shù)據(jù)塊，供它們分別使用。通過多重背景數(shù)據(jù)，也可將幾個FB需要的不同的背景數(shù)據(jù)定義在一個背景數(shù)據(jù)塊中，以優(yōu)化數(shù)據(jù)管理。各數(shù)據(jù)塊在CPU的存儲器中是沒有區(qū)別的，只是由于打開方式不同，才在打開時有背景數(shù)據(jù)塊和共享數(shù)據(jù)塊之分。原則上，任何一個數(shù)據(jù)塊都可以當作共享數(shù)據(jù)塊或背景數(shù)據(jù)塊使用，實際上，一個數(shù)據(jù)塊由FB當作背景數(shù)據(jù)塊使用時，必須與FB的要求格式相符。
數(shù)據(jù)結(jié)構(gòu)

NIB Ametek US Gauge DTT-8304 Digital Thermometer DT8300
NIB USG AMETEK SOLID FRONT 160PSI 4.5" GAUGE #150026
Ametek L-30 Depth Meter
Ametek 119419-00 Blower / Vacuum Motor
Lamb Motor Single Stage 5.7 Thru Flow Ball Bearing 120V
Ametek 1707 Tak-Ette Portable Mechanical Tachometer USA
Ametek Vacuum Motor #118154-54
NOS! AMETEK / ROTRON MUFFLER / SILENCER 523625 14.5"
AMETEK TYPE TK DIAPHRAGM SEAL 1500 PSIG WITH WIKA GAUGE
AMETEK INC. PANALARM ACS-8 8 PIN RELAY
NEW AMETEK AIR VOLUME CONTROL 148540A FOR DEEP WELL/JET PUMPS
Ametek 1X599 0-100 psi 4.5" pressure gauge
WIND GENERATOR TURBINE 400 WATT WITH AMETEK MOTOR
Ametek Vacuum Motor 118148-53 120V 50/60Hz (EC4-2)
AMETEK Alpha 11 Air Sampler Pump Charger # HH0091
Ametek Drexelbrook LCS High Sensitivity Electronics
AMETEK Prestolite SAZ-4201BR Relay Switch Solenoid
AMETEK GAUGE P500 1/4 ANPT CONNECTION SIZE 2
Ametek 24337212-001 Dual Pressure Module 1708 03237212A
Ametek / USG Pressure Gauge 0-30 PSI
New Genuine Ametek Lamb 2 Stage 7.2" Peripheral Bypass Vacuum Motor 115330
AMETEK Panalarm 1423N0L Annunciator Module 1423NOL
AMETEK GAUGE WITH SEAL , 4 1/2" ,160 PSI
AMETEK USG P656 356017LG 0-1000 psi 4" STAINLESS LIQUID-FILLED PRESSURE GAUGE
Ametek Short Shaft Motor, Power Nozzle Hoover Filter Queen - # 5409-31 - NEW
AMETEK 58G3-15BE2 PRESSURE SWITCH 20-100KPA 1/4NPT 115V 17994
New Ametek / pittman GM8222D314-R3 24 VDC GEAR MOTOR
RILEY AMETEK PANALARM 50NC-120A RELAY 120V 60HZ 120 V
Ametek P844UK 2 ?” General Panel Mount Gauge New
AMETEK GAUGE PT 1088 50/260 1/2 ANPT LM
Vacuum Motor CC217L051 Ametek Lamb Oreck NEW
Ametek tachometer
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-
AMETEK DIXSON PROGRAMMABLE BAR GRAPH 0-150 DEG F (s7a)
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-60 (s7a)
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-200 PSIG
AMETEK DIXSON PROGRAMMABLE BAR GRAPH 0-200PSIG B101P
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-150 PSIG
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH -50 to +100
AMETEK DIXSON 101P PROGRAMMABLE BAR GRAPH 0-1000 SCFM
Boeing Aircraft Flap Position Transmitter P/N 966-0013-003
AMETEK / DREXELBROOK 420-1-409 408-6200 SERIES COTE-SHIELD ENCLOSURE - USED, NIC
AMETEK HUNTER SPRING DIV GROUNDING REEL PN ML1565 NIB
AMETEK FILTER HOUSING PATENT # 4731183
OH Ametek Aircraft Load Meter Indicator P/N 8AW61LLA1
0-600 Dial Pressure Gage Ametek Liquid Filled (New in Box) Model P1559LG

SGM-08U3B4L

AMETEK 4" 0/600 PSI WITH HIGH PRESSURE FITTING.
AMETEK 4" 0/3000 PSI 1/4NPT WITH HIGH PRESSURE FITTING.
AMETEK 4" 0/5000 PSI WITH HIGH PRESSURE FITTING.
AMETEK 4.5 1981 SS 02L 160 PSI 1/4"npt
AMETEK DIGITAL THERMOMETER MODEL DT-8330 400/1500 F
6" STEEL WIND TURBINE GENERATOR HUB 4 AIRX blades 4 Ametek or other PM gen 17mm
New Ametek Panalarm 50-L 125DC Relay
AMETEK GAUGE 168541, 1/4" NPT LM, 300 PSI
2 AMETEK/US GAUGE GAUGES M# 5843 - NEW
AMETEK COMPOUND GAUGE 30"Hg TO 30PSI 4-1/2"
Ametek 8280650 - 30-0 Hg 1/4" ANPT LM Vacuum Gauge
NEW USG AMETEK 256013 STYLE: 6562 GAUGE (B97)
Ametek US Gauges Fire Protection Gauge 0-80 PSI 80-250 PSI Retard R-1590 NIB
USG Ametek 2" P-844U General Purpose Gauge 0-100 psi 1/8" NPT 164419 138004 NIB
USG Ametek 2" P-844U General Purpose Gauge 0-60 psi 1/8" NPT 164418 NIB
NEW Relay Switch Solenoid 24 VOLT Prestolite Ametek
NEW USG AMETEK 256019 STYLE: 6562 GAUGE (B97)
1 NIB AMETEK 163139 GAUGE O4-1
AMETEK/USG P550 100 PSI 1/4" ANPT Stainless Tube/Socket
AMETEK USG 161964A PRESSURE GAUGE NIB
Ametek P1555LX Pressure Gauge
Ametek Panalarm 50S190NO Relay
Ametek Panalarm 30-H1 Relay
AMETEK 47104 0-30 PSI 2 1/2" FIG. V-500 PRESSURE GAUGE, NEW
Pittman Ametek GM9434G973-R1 Gearmotor 24-VDC 11.5:1 Gear Motor Gearmotor Servo
AMETEK 0-30PSI *NEW IN BOX*
Ametek Hunter Spring Negator B Motor Hatfield, Pa. Ne'gator
Ametek Panalarm Relay 50-NO
6" STEEL WIND TURBINE GENERATOR HUB 4 AIRX blades 4 Ametek or other PM gen .625"
6" WIND TURBINE GENERATOR METAL HUB 4 AIR-X blades Ametek or other PM gen .500"
NEW AMETEK PANALARM 50-NO RELAY 120V / 50-60 HZ
AMETEK US GAUGE 0-60 psi, 4-1/2 FACE, 1/2" LM, BRASS TUBE & SOCKET 290ER06
Ametek Lamb Vacuum Cleaner Motor Stationary Fan 31175, Fits all 7.5" motors
AMETEK 166322 PRESSURE GAUGE, 100PSI
Ametek 33202 Gauge 0-30 PSI 1/4" NEW
AMETEK P 844 U 2-1/2" PRESSURE GUAGE P844U NEW
Ametek SPT0500X140 Pressure Transducer 1-6VCD
NEW AMETEK 4 1/2" GAUGE 60 PSI 1/2"ANPT FIG. 1980
AMETEK 37325 PRESSURE METER 50PSI 2.5: 138045 NEW
Ametek Series P500 0-600psi Utility Pressure Gauge NIB
USG AMETEK GAUGE P844UK 2”
NEW USG Ametek Utility Gauge 165298, 100 PSI, 1/4 NPT LM #32786
Ametek / Hunter Spring L-1000M Mechanical Force Gage
NEW AMETEK 2300 PSI GAUGE- CONN. 1/4 ANPT LM,SIZE 4 1/2
(2) Ametek USG 300 PSI Gauge E 91
AMETEK GAUGE 100PSI 163271 *NEW IN BOX*

SGM-08U3B4L

USG AMETEK SS RC1 150 PRESSURE GAUGE , 1500PSI
AMETEK TRIM-Series Model T-44N .8 Newton/Divison Force Gage
Genuine Ametek Lamb Motor 1 Stage 5.7 Replaces 116309 116309-00 119400,119400-?00
1 AMETEK ANSI-B40.1 PRESSURE GAUGE N2-3
AMETEK 80466SE SERIES 2000 THERMOX FLUE GAS MONITOR CONTROL BOARD
LOT OF 3 AMETEK GAUGES P77413 P575 *NEW*
LOT OF 2 AMETEK PRESSURE GAUGE P844-U *NEW*
New Ametek USGauge 0-160psi 1X762 Pressure Gage 1/4"NPT
Ametek Vacuum Motor 119433-29 24 volts 3-Stage T/D w/1 1/2" Tube
Ametek Vacuum Motor 116515-13 24 volts 3-Stage T/D
AMETEK USG GAUGE 155025X, SIZE: 4-1/2, 1/4 ANPT LM
AMETEK GAUGE 150035X, 3500 PSI
AMETEK GAUGE, SIZE: 4-1/2, 1929, 1/4" LM
NEW - Lot of 3 - Ametek Temperature Gauge w/ Sensor
AMETEK HUNTER SPRINGS GAGE M# L-30 w/CASE
AMETEK Model DCTG0006BPT022 Brass Press Transducer, 6PSI, 4-20MA
New Ametek U.S. Gauge P-505A (163282) Low Cost Utility Gauge, 200psi. 1/4" NPTLM
Ametek USG 0-200 Solfrunt Gauge 4 1/2" New
AMETEK DREXELBROOK, 700-0002-024, SERIES SENSING ELEMENT. USED
Ametek Micro Jammer 150158-00 12 VDC Blower Motor MicroJammer NEW 4 Wires
TRANE AMETEK GAG 0105 GAG0105 1000PSI 153619 GAUGE
Ametek force tension gage 50 pound rating for parts
119400 116309-00 AMETEK LAMB MOTOR BRAND NEW FAST SHIP
NEW RAMSEY TULSA DESERT WINCH GENUINE PRESTOLITE SOLENOID # 15-301
AMETEK LAMB ELECTRIC 119780-00 VACUUM MOTOR / DL21101T
new AMETEK 1X593 PRESSURE GAUGE 15 PSI 1/2" ANPT LM CONNECTION
Ametek Lamb Central Vacuum Motor Genuine 116309 Replaces119400
AMETEK USG GAUGE 155026X, SIZE: 4-1/2
AMETEK GAUGE 1404, 160 PSI, 132245 L47B, LM 4-1/2 X 1/2 ANPT
AMETEK DREXELBROOK 705-0200-002-0?7 SENSOR
AMETEK USG 1403 6" 0-600PSI 1/2"LBM TEST GAUGE 132601
AMETEK 8544-152 138181 Gauge 60 T0 260oF, NIB =
AMETEK THERMOX PC CARD 80393SE (NIB)
NEW AMETEK 1980 SOLFRUNT GAUGE 160 PSI 4-1/2" 1/2" NPT
NEW AMETEK 1980 SOLFRUNT GAUGE 60 PSI 4-1/2" 1/2" NPT
Ametek USG 0-1000 Solfrunt Gauge New
Ametek USG 0-15 Solfrunt Gauge 4 1/2" New
Ametek USG 0-100 Solfrunt Gauge 4 1/2" New

SGM-08U3B4L