8/12/2018 10:04 PM | |
Joined: 7/10/2017 Last visit: 6/23/2024 Posts: 117 Rating: (2) |
Hi, I m going to upgrade our batching plant from S5 to S7-315 with HMI KTP1200. Existing system has 3 load cells connected to a Measuring and display unit BTW-100 and from there the values are shared with an interface program DS 2000 running on a pc via an interface card. and plc S5 is also communicating to the same pc via another interface card..... I decided to take analog value directly from the measuring unit BTW - 100 and read it in an analog input card and read values in S7 315 and display on KTP 1200.... Now I read about SIWAREX, could you please advice, should i continue with analog card idea OR should I use Siwarex modules? Which method is easier to commission and program in PLC? Also, Is KTP1200 good enough to work with SIWAREX? How would i display measurement values to BTW-100, if in case I am using SIWAREX to connect load cells? I also don't know the charecterischarof load cell, whether it is 2mv/v or 1mv/v because load cells don't have labels...May be PLANT MANUFACTURER removed it.... Thanks.....Hoping for a detailed response at the earliest..... ------------------------------------------------------------------------------------------ |
Last edited by: Jen_Moderator at: 8/13/2018 12:49:02 PMNew subject after splitting |
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8/13/2018 2:46 PM | |
Joined: 1/4/2007 Last visit: 9/2/2024 Posts: 1142 Rating: (175)
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Hello MustafaRaza, If you want, you can use the Siwarex U module (7MH4950-1AA01). The Siwarex U module can handle load cells of 1 … 4 mV/V. On the internet you can find some example projects for the Simatic Maager and TIA Portal: https://support.industry.siemens.com/cs/ww/en/view/28391777 Also I recommend you the Siwatool software (7MH4900-1AK01). This software is a commissioning software and runs on Windows PCs. With this software you can connect directly your PC to the Siwarex U module. If you want to use the Siwatool software, you need also the Siwatool cable (7MH4607-8CA) to connect the Siwarex U module to your PC. The advantage of the Siwarex U module is that you have the correct weight weight value in your PLC. If you are using the analogue output and an analogue input card, you receive a little error of the weight value. The Step7-program of the Siwarex U module isn’t really complicated. The Siwarex U module can only zeroing your current weight value. But I don’t know, if you need other features for your application. Best regards Siwarexi |
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