北京西门子培训教程cpu停机故障

1、检测导致CPU停机的故障SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.1Information and Training Center Knowledge for Automation系统诊断概述可诊断的模板检查错误并产生一个诊断中断I/Q 模块CPU 诊断检查系统错误CPU程序诊断检查错误诊断中断错误OB诊断缓冲区系统状态表诊断信息S IE ME NSP G 740SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4Fil

2、e:SSP2_6C.2Information and Training Center Knowledge for Automation调用“模块信息”工具SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.3Information and Training Center Knowledge for Automation模块信息: “诊断缓冲器”选项SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.4In

3、formation and Training Center Knowledge for Automation解释错误信息SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.5Information and Training Center Knowledge for Automation打开一个有错误的块SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.6Information and Training

4、Center Knowledge for Automation利用堆栈诊断故障置错误位在 LStack （局部堆栈）中可以看到当中断发生时，临时变量的内容在 I Stack （中断堆栈）中可以看到当中断发生时，累加器、寄存器、状态字等的内容错误位置通过 B Stack（块堆栈）可以看到发生错误之前曾执行过的块程序结构包含错误的块SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.7Information and Training Center Knowledge for Automation块堆栈S

5、IMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.8Information and Training Center Knowledge for Automation中断堆栈SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.9Information and Training Center Knowledge for Automation局部堆栈SIMATIC S7Siemens AG 2000. All

6、rights reserved.Date:2018/10/4File:SSP2_6C.10Information and Training Center Knowledge for Automation练习6.1: 发现并排除故障顺序步骤结果12345 执行一次CPU存储器复位CPU存储器被复位将S7程序“ERROR” 从项目“ERROR _16” (“ERROR _32”)拷贝到硬件站“My Station”中显示项目结构将S7程序“ERROR” 中的所有块下装到CPU中包含故障的程序被下装执行一次冷启动CPU进入STOP状态发现并排除所有导致停机的错误CPU保持在RUN状态SIMATIC

7、S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.11Information and Training Center Knowledge for Automation练习6.2: 利用堆栈信息来诊断故障顺序步骤结果321 依次闭合输入开关 I 1.0 到 I 1.2CPU 又一次停机利用诊断缓冲器及堆栈分析故障的原因回答下表中的问题断开输入开关 I 1.0 到 I 1.2CPU 保持在运行状态SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4

8、File:SSP2_6C.12Information and Training Center Knowledge for Automation练习6.3: 读取局部堆栈步骤操作结果321 闭合输入 I 1.2.CPU 又进入停机状态读取导致停机的块的L Stack可以看到以16进制表示的临时变量确定临时变量“var1”的值?SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.13Information and Training Center Knowledge for Automation练习6.4: 使用错误处理 OB步骤操作结果12345 下装S7程序“ERROR”中的FC 45 到CPU在OB1中调用 FC 45执行该块后CPU将停机生成并下装必要的错误处理OB, 使CPU保持在运行状态CPU 保持在运行状态且“SF” 指示灯点亮修改该OB，使得当错误出现后CPU进入停机状态出现错误时 CPU 又可进入停机状态在OB 1中, 删除对FC 45 的调用CPU 保持在运行状态且“SF”指