PS3-AC-EE
内容简介
电话: 微信同号 联系人:吴工PLC控制系统的一般结构和故障类型PLC控制系统主要由输入部分、CPU、采样部分、输出控制和通讯部分组成,如图1所示。输入部分包括控制面板和输入模板;采样部分包括采样控制模板、AD转换模板和传感器;CPU作为系统的核心,完成接收数据,处理数据,输出控制信号;输出部分有的系统用到DA模板,将输出信号转换为模拟量信号,经过功放驱...
- 型号:PS3-AC-EE
- 供货量:1件
- 品牌:PS3-AC-EE
- 发货地:福建厦门
- 发货期:1天内
- 价格:¥468元/件
详细内容
电话: 微信同号 联系人:吴工
PLC控制系统的一般结构和故障类型
PLC控制系统主要由输入部分、CPU、采样部分、输出控制和通讯部分组成,如图1所示。输入部分包括控制面板和输入模板;采样部分包括采样控制模板、AD转换模板和传感器;CPU作为系统的核心,完成接收数据,处理数据,输出控制信号;输出部分有的系统用到DA模板,将输出信号转换为模拟量信号,经过功放驱动执行器;大多数系统直接将输出信号给输出模板,由输出模板驱动执行器工作;通讯部分由通讯模板和上位机组成。
因为PLC本身的故障可能性极小,系统的故障主要来自外围的元部件,所以它的故障可分为如下几种:
(1)输入故障,即操作人员的操作失误;
■传感器故障;
■执行器故障;
■PLC软件故障
这些故障,都可以用合适的故障诊断方法进行分析和用软件进行实时监测,对故障进行预报和处理。
PLC控制系统的故障诊断方法
PLC控制系统故障的宏观诊断
故障的宏观诊断就是根据经验,参照发生故障的环境和现象来确定故障的部位和原因。PLC控制系统的故障宏观诊断方法如下:
■是否为使用不当引起的故障,如属于这类故障,则根据使用情况可初步判断出故障类型、发生部位。常见的使用不当包括供电电源故障、端子接线故障、模板安装故障、现场操作故障等。
■如果不是使用故障,则可能是偶然性故障或系统运行时间较长所引发的故障。对于这类故障可按PLC的故障分布,依次检查、判断故障。首先检查与实际过程相连的传感器、检测开关、执行机构和负载是否有故障:然后检查PLC的I/O模板是否有故障:后检查PLC的CPU是否有故障。
■在检查PLC本身故障时,可参考PLC的CPU模板和电源模板上的指示灯。
■采取上述步骤还检查不出故障部位和原因,则可能是系统设计错误,此时要重新检查系统设计,包括硬件设计和软件设计。
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FANUC OPERATOR INTERFACE BOARD A16B-2200-0660/?05
GE FANUC IC697MDL240B
FANUC A16B-2200-0210/?04A
GE FANUC IC660ED101B
GE FANUC IC697MDL250
GE FANUC ELECTRICAL MODULE IC660EBD100A
FANUC A290-7903-Z011
FANUC A660-8010-T421
FANUC A16B-1500-0010/?03B
FANUC A06B-0113-B175
FANUC A16B-1212-0871/?06A
FANUC A06B-0642-B005
FANUC A06B-0163-B175
GE FANUC IC600YB944A I/O
GE FANUC IC660CBB903K I/O
FANUC A97L-021B-0224
GE FANUC IC3600LFAA1A
FANUC A06B-6047-H041
GE FANUC 0207A250
GE FANUC IC600BF948L
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