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| 1/25/2006 12:05 PM | |
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Posts: 19 Rating:
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Pravin007 check the grounding of the whole system. Also connect the 0VDC (of the 24V power supply) with the ground. |
| 2/12/2006 12:53 PM | |
Joined: 1/7/2006 Last visit: 11/17/2023 Posts: 2705 Rating:
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Hi Pravin, For analog signals the cable's have to be with a ground screen. Further there have to be very good cable laying in the conductors. A good book to see how to do this is a S5 handbook (for S7 i never found something), but this is also working for S7: http://support.automation.siemens.com/WW/view/de/1064706it is in German, maybe you can read it, i haven't found a English version. [:(] Please look on the internet-pages by Customer Support, there are for the analog cards a lot of FAQ's. One that i found: http://support.automation.siemens.com/WW/view/en/20780602 is a compilation of almost all FAQ's for Analog cards for the S7-300 and the S7-400. [:P] There are also handbooks "Getting started" for the analog cards, i have learned a lot of those handbooks: SM331 AI8x12Bit Getting Started Part 1: 4-20 mA http://support.automation.siemens.com/WW/view/en/17473828 SM331; AI 8 x 12 Bit Getting Started Part2: Voltage and PT100 http://support.automation.siemens.com/WW/view/en/18971030 SM331; AI 8 x 12 Bit Getting Started Part 3: Thermo Couples http://support.automation.siemens.com/WW/view/en/18972936 Please look also to the little diskette on the right from the handbooks (where you download them) where is standing "info" there is a source file that can be read directly into the source container in STEP7 and after that compiling it. [8)] When you still have questions after all those information and it won't workthen the Analog card might be defect. Best regards, Late |
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I hope that the answer will help, if you have still questions, don't hesitate to ask me. |
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