根据IEC61508对可编程逻辑器件功能安全的要求，提出基于ARM的模拟量输入模块的安全设计。
Aiming at the functional safe demands of programmable electronic systems in IEC61508, this paper proposes the safe design of Analog Input (AI) module based on ARM Microprocessor.
阐述了电动车组车厢功能级微机网络控制单元xdu的模拟量输入模块的设计思路、技术实现以及硬件配置。
Described are the design thought, technical implement and hardware disposition of the analog input module for the microcomputer network control unit XDU of the car function grade on EMUs.
系统的硬件采样部分由数据采集模块(包括模拟量输入模块和数字量输入模块)构成，各模块间以RS- 485总线形式进行连接。
The hardware sampling unit of the monitor system is constituted by the data gathering module, including digital input module and analog input module, which are connected by the RS-485 main line form.
介绍由at89c52、RAM、AD574、电源电路、模拟量输入采集处理等模块组成的数据采集系统。
The data acquisition system was introduced which was composed of AT89C52, RAM, AD574, power circuit, analog quantity input acquisition module, etc.
PLC下位机作为PC上位机和双丝埋弧焊现场设备的桥梁，选取了基本模块和模拟量输入输出特殊模块。
PLC as a bridge between the PC and basic equipment about the twin-wire SAW, has chosen basic and special module for the lower machine designing.
PLC配合各种模拟量输入输出模块可以对温度、压力、流量等参数进行控制。
PLC can control parameters such as temperature, pressure, flux, etc. by various I/O modules.
PLC配合各种模拟量输入输出模块可以对温度、压力、流量等参数进行控制。
PLC can control parameters such as temperature, pressure, flux, etc. by various I/O modules.
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