英语翻译* How fast does the process occur or machine operate?* Are there “time critical” operations?* In what time frame must the fastest action occur?* Is speed or position being measured?* Does the programmable controller need to count puls

英语翻译* How fast does the process occur or machine operate?* Are there “time critical” operations?* In what time frame must the fastest action occur?* Is speed or position being measured?* Does the programmable controller need to count puls
英语翻译
* How fast does the process occur or machine operate?
* Are there “time critical” operations?
* In what time frame must the fastest action occur?
* Is speed or position being measured?
* Does the programmable controller need to count pulses from an encoder or flow-meter and respond quickly?
Answering these questions will help determine what will be required of the programmable controller.For high-speed applications,the user can install I/Os with fast or adjustable response times or a programmable controller with an adjustable input filter,high-speed counter or triac output circuits.
The Electrical Requirements of a system are determined by the type of power available (i.e.,24V dc,120 or 240V ac) and how the machine or process will be used.The programmable controller should be rated for the same voltage as the relays it replaces.The only reason a voltage would change is if the user decides to convert from an AC to a DC-based system for additional safety.If,for instance,people physically contact the machine,field input devices could be powered by 24V dc to prevent shock.
Considering the plant Environment is the fourth procedure in specifying the programmable controller.Will the programmable controller be subjected to temperature extremes?Water?Humidity?Salt?Shock?Dust?Vibration?While some environmental concerns such as humidity can be addressed by choosing an enclosure with specific features,most environmental concerns are addressed during the installation stage.For instance,in a high-temperature environment,you may need to put heat sinks on the outside of the panel or some kind of cooling system.In any application,be cautious of locating the programmable controller in an enclosure with other heat-generating sources -- 60 degrees Celsius is typically the maximum temperature for most programmable controllers.Programmable controllers are segmented into four major areas:Micro (up to 32 I/O),Small (32 to 128 I/O) Medium (128 I/O up to 512) and Large (512 I/O and higher).Since some of the options,such as analog inputs and outputs and networking capabilities,are only available on select programmable controllers,a modular approach is also an option.While fixed programmable controllers have a predetermined combination of discrete inputs and outputs,the modular approach allows the user to match the I/O requirements of the application for the ideal solution.Many fixed programmable controller systems can accept different I/O voltages and are typically the less expensive approach.Fixed controllers can also be much faster.
希望自己翻译了不要用软件了,如果英语还行又不想自己慢慢翻可以参照软件翻译理顺就好了,

英语翻译* How fast does the process occur or machine operate?* Are there “time critical” operations?* In what time frame must the fastest action occur?* Is speed or position being measured?* Does the programmable controller need to count puls
*有多快的过程中发生或机器运作呢? *是否有“时间紧迫”操作? *在什么时间框架必须以最快的行动发生的? *是速度或位置被测量? *可编程控制器是否需要从一个编码器计数流量计脉冲,并快速响应? 回答这些问题将有助于确定什么是可编程控制器所需. 对于高速应用中,用户可以安装或可调我和快速的响应时间或一个带有可调节输入滤波器,高速计数器或可控硅输出电路的可编程序控制器/ O操作. 一个系统的电气要求取决于可用的电源类型（即,24V直流,120或240V交流）,以及如何机器或过程将被使用. 可编程控制器应额定为同一电压继电器它取代. 唯一的原因,电压会改变的是,如果用户决定由AC转换为其他安全区为基础的系统. 如果,例如,人身体接触的机器,现场输入设备可以由24V直流供电,以防止震动. 考虑到厂区环境是指定第四可编程控制器程序. 可编程控制器将受到极端温度? 水? 湿度? 盐? 冲击? 尘埃? 振动? 虽然诸如湿度一些环境问题可以通过选择具有特定功能的外壳处理,最关注的环境问题解决在安装阶段. 例如,在高温环境中,可能需要把在面板或某些种类的冷却系统外部散热器. 在任何应用程序时,应定位在一个与其他发热源外壳可编程控制器谨慎 - 60摄氏度是最典型的可编程控制器的最高温度. 可编程控制器是分割成四个主要领域：微观（最多32个I / O）的,小（32至128个I / O）的中（128的I / O多达512个）,大（512 I / O和更高）. 由于如模拟输入和输出和网络功能的选项,有一些,仅在选择可编程控制器可用,模块化的方法,也是一种选择. 而固定可编程控制器有一个预定的离散输入和输出相结合,模块化方法允许用户理想的解决方案相匹配的I / O要求的应用. 许多固定的可编程控制器系统可以接受不同的I / O电压和通常是较便宜的方法. 固定控制器也可以快很多.