描述
利用变频器PG卡输出端(TA2.1)将脉冲信号引入PLC的高速计数输入端0000,构成位置反馈。高速计数器(CNT47)累加的脉冲数反映电梯的位置。高速计数器的值不断地与各信号点对应的脉冲数进行比较,由此判断电梯的运行距离、换速点、平层电和制动停车点等信号。理论上这种控制方式其平层误差可在±1个脉冲当量范围。在考虑减速机齿轮啮合间隙等机械因素情况下,电梯的平层精度可达±5mm内,大大低于国标±15mm的标准,满足电梯起制动平滑,运行平稳,平层准确的要求。电梯在运行过程中,通过位置信号检测,软件实时计算以下位置信号:电梯所在楼层位置、快速换速点、中速换速点、门区信号和平层位置信号等。由此省去原来每层在井道中设置的上述信号检测装置,大大减少井道检测元件和信号连线,降低成本。下面针对在实现集选控制基础上新增添的楼层计数、快速换速、中速换速、门区和平层信号5个子程序进行介绍。
3.1楼层计数
本设计采用相对计数方式。运行前通过自学习方式,测出相应楼层高度脉冲数,对应17层电梯分别存入16个内存单元DM06~DM21。
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。
RAD ACE-3600 RNC-Site Gateway 4930020000
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RAD AIRMUX-200/ODU/F24F/230/EXT/POE WIRELESS ANTENNA
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RADWARE WEB SERVER DIRECTOR NP 5GB 16FE 128MB WSD NP
Item title
HP PROLIANT ML350 E5320 QUAD 2×1.86GHz 440189-421 2GB
COMPAQ ALPHASERVER DS10 DA-PB10A-AC
IBM HS20 Blade Server 8843-PLS Dual Xeon 3.6GHz 2G RAM
IBM HS20 Blade Server 8843-PLV Dual Xeon 3.6GHz 2G RAM
IBM HS20 Blade Server 8843-PST Dual Xeon 3.6GHz 4G RAM
IBM HS20 Blade Server 8843-45G Dual Xeon 3.6GHz 2G RAM
IBM HS20 Blade Server 8843-CTO Dual Xeon 3.6GHz 2G RAM
CROSSBEAM C25 Dual Xeon 3.2GHz 2G RAM NO HDD
SIEMENS RACK FP1 HI7050 W/MFP1,FFP1,E1554 MODULES
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HP 433027-03 436151-001 1.86Ghz 1066mhz E5320 Quad Core
POWER ONE SPDSUNM-02 SUN P/N 300-2006-03 FROM T2000 DC
Sun SAS Hard Drive 540-6611 73GB MAY2073RC 540-6611-01
SUN 300-1852-04 POWER SUPPLY FROM V215 AC 300-1852
Sun 501-7500 SERVICE PROCESSOR ROHS 501-7500-05 T2000
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HP E1697A 155 Mb/s OPTICAL LINE VXI HP 75000 SERIES C
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LOT OF 2 HP E4209A CELL PROTOCOL PROCESSOR HP 75000 C
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LOT OF 2 HP E4209A CELL PROTOCOL PROCESSOR HP 75000 C
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HITACHI 9200 F1F CONTROL UNIT+DFFM5 FIBRE I/F CARD