1769-CRR1
扫描循环模式
PLC通过不断地扫描输入信号来获取实时信息，然后对程序进行逐步执行，后实现对输出信号的控制。PLC在扫描过程中会运行用户程序，包括读取输入信号、处理逻辑、更新内部状态和输出信号控制等。
PLC的扫描循环是一个不间断的循环过程，循环时间为毫秒级别。在一个循环周期内，PLC会完成以下步骤：
1. 读取输入信号，包括数字量（开关量）和模拟量（模拟信号）。
2. 处理逻辑，例如处理控制算法、逻辑判断等。
3. 更新内部状态，记录新的信息、状态和参数。
4. 控制输出信号，包括数字量和模拟量。
5. 等待下一个扫描周期。
2. 事件驱动模式
PLC采用事件驱动模式时，程序的执行完全是由事件的触发来触发的。PLC在等待事件的时候，它处于低功率状态，以节省能量。
事件驱动模式通常适用于以下情况：
1. 实时性要求比较高，需要及时响应输入和输出信号。
2. 采用多任务处理。
3. 程序的组织结构非常复杂，每一个事件都需要进行独立的处理。
3 Only Dynamatic Driver Boards
Asco EF8015B224 Explosion Proof Manual Reset Valve
Asco Explosion Proof Internal Pilot Valve 2-Way 1/2"
Reuland Magnetic Brake OCFM-J16N25-00
Sieger Honeywell 705 Series Combustible Gas Sensor 6 Pc
Thomson Micron Nema True NTR42-002 Right Angle Gearhead
Penberthy MGT-362 Continuous Level Transmitter
Mitsubishi Freqrol Z200 Frequency Inverter Drive
Telesis TMM5000 Pinstamp Marking System Head
Endress & Hauser Liquiphant M Vibration Limit Switch
United Electric Controls Explosion Proof Switch 2Pcs
Mitsubishi FR-BU-C22K Dynamic Braking Unit
Jordan 2" 300LB Flg 316SS Sliding Gate Valve Regulator
EMS G5 Series Vector Control Variable Frequency Drive
Servomex S1750702 C02 Cell For Model 2700 4Pcs
Fisher Electronic Position Transmitter Type 4221
Todd Combustion Atomizer Assy #Atomizer-28
ProTech Bearing Isolator LBE-3938-4960-D98 6Pcs
Todd Combustion Dynalite Ignitor # I-04-01-0138
Rosemount 3051S1 Supermodule Output Hart Transmitter
Banner MGE3616A 36" Light Curtain Emitter
6 Only Gould Modicon Modules
Electro Cam PS-5124-24M09H Programmable Limit Switch
Kromer Zero Gravity Tool Balancer 7240-6
Halbrite Oil Tools 1 1/4" Aluminum Blowout Preventer
Cabletron HSIM-G01 Expansion Module
Endress & Hauser FXA 191-S1 Commubox Hart Interface
Electro Cam PS-5124-10-M09 Programmable Limit Switch
ProTech Bearing Isolator FNE-1625-2375-1-1 8Pcs
ProTech Bearing Isolator LBE-9563-11028-J42 4Pcs
ProTech Bearing Isolator LBE-7813-9340-AR89 4Pcs
1 Lot JM Clipper ProTech Bearing Isolator 5Pcs
Fireye 70D40 120V Burner Management Control Series D
Caloritech Hazardous Location Immersion Heater 2Pcs
Continental Disc 24" 316SS Rupture Disc PH-PSE-171
Sentry VREL High Pressure Sample Flow Control Valve 3Pc
Cabletron 6H122-08 Smartswitch 6000 Module 2Pcs
Magnetrol Tuffy II T31-002N-KOC Nema 4X Level Switch
Foxboro IGP20-T22D01CK11 Intrinsically Safe Transmitter
Rofin Baasel Safety Shutter 10000-588 V-C-3778
Teledyne Republic 134F-6B Valve 75 pcs
Process Technology Inc 50 -300F Temperature Controller
Nook Industries ActionJac Worm Gear Screw Jack
Jesco Products N1420-V Power Flow Valve
KF Actuated Ball Valve Positioner & Solenoid Valve 2Pcs
EOTec 222001 Fibre Optic Line Driver 3Pcs
Spears 3/4" Thrd PVC True Union Ball Check Valve 27Pcs
Rotan CD26FMR 3U222 Chemical Duty Pump
1 Lot 5/8" Stainless Steel 8M Nuts & B8M Studs 568Pcs
Varec 2" 150LB Flanged 5010 Carbon Steel Flame Arrestor
Reliance Electric Electrocraft Servo Motor 1326AB-B520E
Rosemount 68 Sensor C/W 316SS Flanged Thermowell
Z-World Galvanic Analytical System Mass Flow Computer
Chromalox Wiegand Hazrdous Location Industrial Heater
1 lot Durametallic Seals
Asco Solenoid Air Valve 4-Way 1/4", 120/60 2Pcs
Ingersoll Rand 300S826 Air Valve 2Pcs
Westlock Controls ICOT 4200 Smart Valve Positioner 4Pcs
Garlock 5000PBI 1" 10Lb Box Lattice Braid Pump Packing
Wm. Christensen Co. T63202-A Control 6Pcs
Hercules 200P 2000PSI Blow Out Preventor 3" 8Rd EUE
ABB 10A2235 RATOSIGHT Flow Rate Indicator with Ratolarm
Gast NL32-NCC-19 Motor 3Pcs
Koyo 6219ZZXC3 Metal Shielded Groove Ball Bearings 9Pcs
1 lot Koyo Ball Bearings 41Pcs
Sporlan MPE-30-C Thermostatic Expansion Valve 2pcs
7 1/16 & 3 1/2 F/LWB64 Low Temp Rubber BOP Preventors
KTM CF8M Ball Valve C/W Avid Postioner, Morin Actuator
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