MVME236-3自动化卡件PLC系统模块现货

类目：MOTOROLA
型号：MVME236-3
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MVME236-3自动化卡件PLC系统模块现货

由于采用交-直-交电压型变频器，在电梯位势负载作用下，制动时回馈的能量不能馈送回电网，为限制泵升电压，采用受控能耗制动方式。 2.2 PLC控制电路选用OMRON公司C系列60P型PLC。PLC接收来自操纵盘和每层呼梯盒的召唤信号、轿厢和门系统的功能信号以及井道和变频器的状态信号，经程序判断与运算实现电梯的集选控制。PLC在输出显示和监控信号的同时，向变频器发出运行方向、启动、加/减速运行和制动停梯等信号。 2.3 电流、速度双闭环电路采用YASAKWA公司的VS-616G5 CIMRG5A 4022变频器。变频器本身设有电流检测装置，由此构成电流闭环；通过和电机同轴联接的旋转编码器，产生a、b两相脉冲进入变频器，在确认方向的同时，利用脉冲计数构成速度闭环。 2.4 位移控制电路电梯作为一种载人工具，在位势负载状态下，除要求安全可靠外，还要求运行平稳，乘坐舒适，停靠准确。采用变频调速双环控制可基本满足要求，但和国外高性能电梯相比还需进一步改进。本设计正是基于这一想法，利用现有旋转编码器构成速度环的同时，通过变频器的PG卡输出与电机速度及电梯位移成比例的脉冲数，将其引入PLC的高速计数输入端口0000，通过累计脉冲数，经世式（1）计算出脉冲当量，由此确定电梯位置。电梯位移 h=SI 式中 I——累计脉冲数 S——脉冲当量 S = lpD / (pr) （1）本系统采用的减速机，其减速比l = 1/32，曳引轮直径D = 580mm，电机额定转速ned = 1450r/min，旋转编码器每转对应的脉冲数p = 1024，PG卡分频比r = 1/18，代入式（1）得 S = 1.0mm / 脉冲 3 程序设计利用变频器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。楼层计数器（CNT46）为一双向计数器，当到达各层的楼层计数点时，根据运行方向进行加1或减1计数。楼层计数程序流程图如图2 所示。

运行中，高速计数器累计值实时与楼层计数点对应的脉冲数进行比较，相等时发出楼层计数信号，上行加1，下行减1。为防止计数器在计数脉冲高电平期间重复计数，采用楼层计数信号上沿触发楼层计数器。according to the adjustment of motor speed, such as energy saving of injection molding machine, energy saving of air compressor, etc. According to the requirements of lighting energy saving, whole plant energy saving and frequency conversion energy saving, the c18drma-ld special PLC developed by Davidson company integrates all the functions required for voltage regulation and speed regulation energy saving. Including voltage and current collection of mains power, control of voltage regulator and energy saver, optional multiple remote communication modes, real-time clock, local 7-segment nixie tube display and LCD display, local touch key and PVC key. At the same time, c18drma-ld also retains all the original characteristics of PLC, including super anti-interference ability, ladder programmable ability, various standard communication and IO interfaces, RAM area with power down hold, etc.

As shown in the figure above, PLC adjusts the output of the energy-saving voltage regulator according to the collected mains voltage and different energy-saving strategies. At the same time, it can access the Internet through GPRS DTU to transmit the on-site data to the remote online computer, and the remote monitoring computer can control and adjust the on-site strategies. 3. Characteristics of c18drma-ld: 3.1 the CPU module of most PLC for municipal power acquisition has quite few analog quantities, while the number of analog quantities required for street lamp energy saving is quite large. If it is medium and high-grade energy-saving control, 7 analog quantities are usually required, which leads to the increase of cost. The c18drma-ld can collect up to 7 analog signals, which can meet the needs of most users. The usual energy-saving controller only needs 2 analog signals, 1 mains voltage and 1 current signal. In the whole plant, energy-saving and large street lamp economizers need to collect 3 voltage and 1 or 4 current signals, so the c18drma-ld can cope with them easily. 7 the types of analog input signals include:? 10V,?

RELIANCE

ABB

GE

FOXBORO

EMERSON艾默生

A-B

MOTOROLA

TRICONEX

HONEYWELL霍尼韦尔

HIMA

140系列PLC

BENTLY本特利

其他

SST

EPRO

YOKOGAWA

MOOG

NI

WOODWARD伍德沃德

METSO

KOLLMORGEN科尔摩根

力士乐

ALSTOM阿尔斯通

YASKAWA安川

AMAT

ICS TRIPLEX

新能源系列

EATON

MVME236-3自动化卡件PLC系统模块现货

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