免费的西门子技术支持 点击：100846 | 回复：2872
发表于：2008-03-13 10:29:00
楼主
本人愿和同道中人共同探讨西门子技术范围包括（200/300/400/Wincc/Hmi)
技术文章参考博客！ http://jiansiting.gkbk.com
发表于：2009-04-18 11:29:57
2001楼
to 迦若,1 please check your drives for cp5512. 2 about set pg/pc you may look for this solution on BLOG, mpi is 187.5k but rs485 is 9600. 3 ok, no problem. you may to copy all tag form mpi to profibus. 4 ok, but you need plcsim software, you will setup mpi in pg/pc and then configurating the tag in wincc, you just download the programme in step7, you can look dynamic data in wincc.
发表于：2009-04-18 11:32:30
2002楼
to 天天工控,Access to the Modbus slave manual here
Good point, if your Rx LED is blinking, it shows that the electrical connection between the 2 units is good; doesn‘t mean that it is validated for the protocol though, but it is better than no LED at all.
Now for some questions:
How did you parametrize the CP 441-2, how is it setup.
Did you create a PtP connection in Netpro? The connection ID number is required in the communication FB180 Parameter "ID")
The properties of the CP 441-2 have been correctly setup for Modbus (baudrate, parity...) you say The parameters have been correctly downloaded to the CPU? (Just checking...)
Please show a screencapture of your FB180 call in OB1, we probably need to see how it has been setup to help you out.
Have you inserted a rising edge on the input parameter "CP_Start" in OB100, to initialize the CP in the CPU startup?
Which Modbus function codes (and lengths) are requested by the master, and how did you associate the native S7 addresses to the Modbus (Modicon) addressing for the different Modbus functions?
The manual suggested above has some information on these (and many other) aspects of setting up a CP 441-2 as Modbus slave. And there are chapters on the diagnostics of the CP 441-2, starting with LEDS decoding, use of the diagnostic buffer of the CP (through the Onlive view of the Hardware Config editor) and the Systat message area of the instance DB of FB180. But we also will be here to give a hand, so come back to the forum with any other questions or clarifcations.
Good point, if your Rx LED is blinking, it shows that the electrical connection between the 2 units is good; doesn‘t mean that it is validated for the protocol though, but it is better than no LED at all.
Now for some questions:
How did you parametrize the CP 441-2, how is it setup.
Did you create a PtP connection in Netpro? The connection ID number is required in the communication FB180 Parameter "ID")
The properties of the CP 441-2 have been correctly setup for Modbus (baudrate, parity...) you say The parameters have been correctly downloaded to the CPU? (Just checking...)
Please show a screencapture of your FB180 call in OB1, we probably need to see how it has been setup to help you out.
Have you inserted a rising edge on the input parameter "CP_Start" in OB100, to initialize the CP in the CPU startup?
Which Modbus function codes (and lengths) are requested by the master, and how did you associate the native S7 addresses to the Modbus (Modicon) addressing for the different Modbus functions?
The manual suggested above has some information on these (and many other) aspects of setting up a CP 441-2 as Modbus slave. And there are chapters on the diagnostics of the CP 441-2, starting with LEDS decoding, use of the diagnostic buffer of the CP (through the Onlive view of the Hardware Config editor) and the Systat message area of the instance DB of FB180. But we also will be here to give a hand, so come back to the forum with any other questions or clarifcations.
发表于：2009-04-19 13:20:30
2006楼
剑工：你好！
我公司采用西门子的高压变频器，主系统为SIMADYN D，下挂三个ET200 IM151，现在第一个IM151报通讯故障（SF、BF交替红灯闪烁），给控制系统下电后，通讯能恢复正常，过一段时间又报。IM151原型号为6ES7 151－1AA03－0AB0，新型号为6ES7 151－1AA04－0AB0。请问，更换后需不需要修改SIMADYN D的配置，是不是更换后就能正常运行。
该变频器为我公司最重要设备的启动装置，目前还能凑合启动，担心更换模块后不能正常运行，因没有SIMADYN D程序无法修改配置。请各位大侠指点！是不是更换模块后就能正常运行，不需要修改SIMADYN D的配置？
急！急！谢谢！
发表于：2009-04-21 19:37:20
2020楼
剑工:
您好!
我正在学习PLC的编程,今天试到模拟量的采集,我是用224DC/DC/DC+EM235. 我只用到一个模拟输入口,输入0-10V的电压信号(10V的开关电源加一个10K的电位器调节），另外三个模拟输入口按照要求短接.DIP开关设置为OFF ON OFF OFF OFF OFF ON.
问题是:
a. 0-10V的电压信号接入到模拟输入端之前测试过是正常的,但是接好之后,电压输入就不正常了(接之前测试转到1K时电压为1V,接之后转到1K时电压为2.56V),这是怎么回事?
b. 电压输入为0V时,相应的数据寄存器数值应该是0吧,可我这个数值怎么是15000多?
c. PLC和电脑的通讯不是很正常,经常自己断掉.断掉之后,我关掉PLC和STEP7重启,然后通讯就连不上了,提示端口无法打开或正由另一个应用程序使用.
望剑工指教!
剑工，您好！ 在您的指导下问题已经解决,谢谢了. 您是授之与渔呀.
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