3/3/2015 10:38 AM | |
Posts: 158 Rating: (3) |
Hi, I have a machine here that is using Siemens S7-300 CPU 315 communicating with Siwarex U (7MH4950-2AA01). Now my CPU 315 is faulty and I have to replace it. I have CPU 315-2DP and CPU318-2. I would prefer to use CPU 315-2DP so after connected to siwarex before hardware configuration and program block were downloaded, no errors on PLC, however i was not able to send 'ZERO' command to siwarex module to set it to zero as it was showing some strange values even when the tanks were empty. For testing purpose, i have tested this machine by connecting CPU318-2DP to Siwarex before hardware configuration and program block were downloaded, no errors on PLC. Now i am able to send 'zero' commands to siwarex module, and weight display values were zero. I have checked the values in DB responsible to read data from siwarex and found that this siwarex module is sending different values to the PLC. Attached screenshots on DB values with this mail. I question is, why is siwarex writing different sets of values when the CPU are changed? in both cases, tanks were empty.
Please Advise. Thank you AttachmentScreenShots.rar (168 Downloads) |
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