描述
中等规模PLC控制系统:生产过程是复杂逻辑控制和闭环控制,I/O点数在128——512点之间。应该选用具有模拟量控制、PID控制等功能的PLC,如SIEMENSS7-300等。
大规模PLC控制系统:生产过程是大规模过程控制、DCS系统和工厂自动化网络控制,I/O点数在512点以上。应该选用具有通信联网、智能控制、数据库、中断控制、函数运算的高档PLC,如SIEMENSS7-400等,再和工业现场总线结合实现工厂工业网络的通讯和控制。
2.2确定PLCI/O点的类型
根据生产工艺要求,分析被控对象的复杂程度,进行I/O点数和I/O点的类型(数字量、模拟量等)统计,列出清单。适当进行内存容量的估计,确定适当的留有软硬件资源余量而不浪费资源的机型(小、中、大型机器)。
根据PLC输出端所带的负载是直流型还是交流型,是大电流还是小电流,以及PLC输出点动作的频率等,从而确定输出端采用继电器输出,还是晶体管输出,或品闸管输出。不同的负载选用不同的输出方式,对系统的稳定运行是很重要的。
电磁阀的开闭、大电感负载、动作频率低的设备,PLC输出端采用继电器输出或者固态继电器输出;各种指示灯、变频器/数字直流调速器的启动/停止应采用晶体管输出。
欧美品牌停产的,常用的“PLC”备品备件
我司产品应用于以下领域:
1,《发电厂DCS监控系统》
2,《智能平钢化炉系统制造》
3,《PLC可编程输送控制系统》
4,《DCS集散控制系统》
5,《智能型消防供水控制系统》
6,《化工厂药液恒流量计算机控制系统》
7,《电气控制系统》造纸,印染生产线,变电站综合自动化控制系列
本特利,英维思,伍德沃德,福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐,ACSO,力士乐等各大品牌的DCS系统配件,机器人系统配件,大型伺服系统备件。
ADVANCED ENERGY PDW 2200 AE 3156011 Lam 853-015516-002
796-00809 ANGLE VALVE REBUILD KIT
LAM PART # 770-008341-002 PNEUMATIC CYLINDER
LAM 6 SPIN CHUCK PART # 715-013718-006
LAM RESEARCH ESC ELECTRODE 8 839-440462-308
AMAT PORT SERVER CABLE PART # 0140-77615
NOVELLUS THERMOCOUPLE UNIT PART # 03-10411-00
USHIO 100W Merqury Short Lamp
LAM RESEARCH RING COUPLER PART # 715-140153-008
PEDESTAL VACUUM PRESSURE SWITCH PART # 0090-77032
LAM ESC POWER SUPPLY DISTR. PCB PART # 810-370141-001
LAM GATE HEAD IONIZED PART # 715-012233-003
JUMPER 4PIN CONN, GEN RACK EMO AMAT PART# 0150-20143
CONN ADPTR MTG QDS-UL(F)/QC(M) AMAT PART # 0020-04376
LIFT PIN, .090, SIMPLE CATH AMAT PART # 0021-10566
TEFLON RING BLOCKER AMAT PART # 0021-38799
AMAT PART # 0020-21944 8 QTZ PRECLEAN PLATE
AMAT PART # 0020-24435 INSULATOR QUARTZ 8
AMAT PART # 0200-35224 VIEWPORT WINDOW
AMAT PART # 0200-35013
AMAT PART # 0200-09086
AMAT PART # 0200-35160
AMAT PART # 0200-35782 QUARTZ SHADOW RING 200mm FLAT
COMDEL CLX-2500 RF GENERATOR
COMDEL CLX2500 RF GENERATOR PART # FP1335R4
COMDEL CX1250S RF POWER SUPPLY
COMDEL CPS1001S 13.56mhz RF GENERATOR P/N 0190-70099
COMDEL CPS-500AS RF POWER SOURCE AMAT P/N 0190-13320
ADVANCED ENERGY PDX 500 RF GENERATOR
LAM RESEARCH BAFFLE PLATE LOWER PART # 715-011913-083
CENTURA SLIT VALVE DOOR PART # 0021-09922
THREE WAY VALVE AMAT PART # 3870-02221
PARKER THREE WAY VALVE MODEL # 955Y3NC
MKS ISOLATION VALVE MODEL # L2-40-AK-225-VN?VNH
AMAT PART # 0200-35556 COLLAR 200mm SNNF TOP
AMAT PART # 0200-20060 INSULATING QUARTZ 6 SMF PC11
AMAT PART # 0200-35539 200mm BLADE ROBOT QTZ w/RADIUS
AMAT PART # 0200-32985 GAS RING 12 HOLES
AMAT PART # 0200-35145 ADAPTER WINDOW 2mm RP CHAMBER
AMAT PART # 0200-10455
AMAT PART # 0200-76019 10N SHIELD LIFT
AMAT PART #0200-20074 DOOR PRECLEAN CHAMBER QUARTZ
EDWARDS QDP40 DRY VACUUM PUMP BRAND NEW ( NEVER USED )
AMAT PART #0020-29343 DARK SPACE SHIELD CLAMP
DPS II RF Source Matching Network (0190-15168)
Firmware has been updated
VEXTA STEPPING MOTOR MODEL PX243-01B
AMAT 8 SHUTTER DISK PART 3 0020-05384
AMAT ENDURA COVER RING PART # 0020-24804
LOWER MAGNETIC BRACKET AMAT PART # 0021-36605
CERAMIC LIFT PIN/SHORT PART # 0200-10162
BRACKET COIL FRONT PART #0021-36606
FRAME ALIGNMENT PIN PART # 0020-27812
VACUUM SWITCH PART # 853-017631-001
SLOW VACUUM VALVE MODEL # FPR-91-9.52
THERMCO PCB ASSEMBLY PART # 110568-005 Z-80 PROCESSOR
NOVELLUS NICKEL SPINDLE SHAFT
NOVELLUS ANALOG INPUT PCB SLOT 6 PART # 19-00126-00
AMAT PART 0020-19002
853-014637-012 MODEL OEM 6AM-1-B RF Generator
ADVANCED ENERGY RFG-1250 HALO
CATCHY .COM DOMAIN NAMES allfortools.com?+all4tools.com
2 NICE Nortel CARD CAGE CPCI CORE NET AC/DC NT4N40ACE5
AT&T DDM-2000 OC-3 OC3 SHELF/CHASIS LOADED WITH CARDS
QTY 28 NEW 3COM 1681-0 ISOLAN TP TRANSCEIVER 3C16810
60x 50/125 15′ FIBER OPTIC CABLES W/ODD CONNECT. SC-SC?
SQUARE D ATV58FHD28N4 ALTIVAR 58 AC DRIVE 25HP 18.5KV
13204′ NEW CORNING FIBER OPTIC FURCATION/FAN-O?UT TUBING
NEW SHENICK DIVERSIFEYE 8400 IP TESTER 8 SLOT CHASIS
BRUNSWICK MARINE P/A QUICKSILVER SEAWATER FILTER 860603
NEW ROFIN LASER SOFTSTART UNIT SLABLASER 1500-6000 WATT
NEW LOT OF 105 VARIOUS MARS MOTOR RUN CAPACITORS
AMAT APPLIED MATERIALS 0021-25014 DISK SHUTTER BESC PIN