1、檢測(cè)導(dǎo)致CPU停機(jī)的故障SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.1Information and Training Center Knowledge for Automation系統(tǒng)診斷概述可診斷的模板檢查錯(cuò)誤并產(chǎn)生一個(gè)診斷中斷I/Q 模塊CPU 診斷檢查系統(tǒng)錯(cuò)誤CPU程序診斷檢查錯(cuò)誤診斷中斷錯(cuò)誤OB診斷緩沖區(qū)系統(tǒng)狀態(tài)表診斷信息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調(diào)用“模塊信息”工具SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.3Information and Training Center Knowledge for Automation模塊信息: “診斷緩沖器”選項(xiàng)SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.4In

3、formation and Training Center Knowledge for Automation解釋錯(cuò)誤信息SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.5Information and Training Center Knowledge for Automation打開(kāi)一個(gè)有錯(cuò)誤的塊SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.6Information and Training

4、Center Knowledge for Automation利用堆棧診斷故障置錯(cuò)誤位在 LStack （局部堆棧）中可以看到當(dāng)中斷發(fā)生時(shí)，臨時(shí)變量的內(nèi)容在 I Stack （中斷堆棧）中可以看到當(dāng)中斷發(fā)生時(shí)，累加器、寄存器、狀態(tài)字等的內(nèi)容錯(cuò)誤位置通過(guò) B Stack（塊堆棧）可以看到發(fā)生錯(cuò)誤之前曾執(zhí)行過(guò)的塊程序結(jié)構(gòu)包含錯(cuò)誤的塊SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.7Information and Training Center Knowledge for Automation塊堆棧S

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

6、rights reserved.Date:2018/10/4File:SSP2_6C.10Information and Training Center Knowledge for Automation練習(xí)6.1: 發(fā)現(xiàn)并排除故障順序步驟結(jié)果12345 執(zhí)行一次CPU存儲(chǔ)器復(fù)位CPU存儲(chǔ)器被復(fù)位將S7程序“ERROR” 從項(xiàng)目“ERROR _16” (“ERROR _32”)拷貝到硬件站“My Station”中顯示項(xiàng)目結(jié)構(gòu)將S7程序“ERROR” 中的所有塊下裝到CPU中包含故障的程序被下裝執(zhí)行一次冷啟動(dòng)CPU進(jìn)入STOP狀態(tài)發(fā)現(xiàn)并排除所有導(dǎo)致停機(jī)的錯(cuò)誤CPU保持在RUN狀態(tài)SIMATIC

7、S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.11Information and Training Center Knowledge for Automation練習(xí)6.2: 利用堆棧信息來(lái)診斷故障順序步驟結(jié)果321 依次閉合輸入開(kāi)關(guān) I 1.0 到 I 1.2CPU 又一次停機(jī)利用診斷緩沖器及堆棧分析故障的原因回答下表中的問(wèn)題斷開(kāi)輸入開(kāi)關(guān) I 1.0 到 I 1.2CPU 保持在運(yùn)行狀態(tài)SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4

8、File:SSP2_6C.12Information and Training Center Knowledge for Automation練習(xí)6.3: 讀取局部堆棧步驟操作結(jié)果321 閉合輸入 I 1.2.CPU 又進(jìn)入停機(jī)狀態(tài)讀取導(dǎo)致停機(jī)的塊的L Stack可以看到以16進(jìn)制表示的臨時(shí)變量確定臨時(shí)變量“var1”的值?SIMATIC S7Siemens AG 2000. All rights reserved.Date:2018/10/4File:SSP2_6C.13Information and Training Center Knowledge for Automation練習(xí)6.4: 使用錯(cuò)誤處理 OB步驟操作結(jié)果12345 下裝S7程序“ERROR”中的FC 45 到CPU在OB1中調(diào)用 FC 45執(zhí)行該塊后CPU將停機(jī)生成并下裝必要的錯(cuò)誤處理OB, 使CPU保持在運(yùn)行狀態(tài)CPU 保持在運(yùn)行狀態(tài)且“SF” 指示燈點(diǎn)亮修改該OB，使得當(dāng)錯(cuò)誤出現(xiàn)后CPU進(jìn)入停機(jī)狀態(tài)出現(xiàn)錯(cuò)誤時(shí) CPU 又可進(jìn)入停機(jī)狀態(tài)在OB 1中, 刪除對(duì)FC 45 的調(diào)用CPU 保持在運(yùn)行狀態(tài)且“SF”指