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EM 231 Please HELP!!!

8/5/2009 2:17 PM	Rate (0)
Stason Posts: 12 Rating: (0)	I have an 231-0HC22-0XA0 module. And I need to Switch DIPs to for 4-20mA.(I don't know how they should be.) How should I switch DIPS? And Could you write to me a programm sample. if AIW1 = 10mA then switch on Q0.1. If it possible? thanks.
Stason Posts: 12 Rating: (0)
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8/5/2009 3:32 PM	Rate (0)
ionut.b Bronze Member Joined: 1/17/2007 Last visit: 10/6/2020 Posts: 289 Rating: (3)	Hello. Please check S7-200 System Manual page. 416 for detailed info about dip switch. https://support.automation.siemens.com/WW/skm/frameset.asp?url=%2FWW%2Fllisapi%2Edll%2F1109582%3Ffunc%3Dll%26objId%3D1109582%26objaction%3Dcsopen%26skm%3D1%26siteid%3Dcseus%26lang%3Den%26query%3DS7%252D200%26ehbid%3Dhtml%255F76%252Fehb%252F1109582%252Ehtm%26nodeid%3D1113428&Query=S7%2D200&SearchArea=hb&id=1109582&F11Marker=true&siteid=cseus&query2=&modelled=&lang=en Try to search this forum about S7-200 analog scaling. Attachment DIP switch.JPG (491 Downloads)

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8/8/2009 9:54 AM	Rate (0)
Tomy Master Gold Member Joined: 5/4/2009 Last visit: 11/23/2024 Posts: 914 Rating: (40)	Dear Stason... You can set dip switch 1 & 2 to "on" position to set the module input to 0...20mA, and with a little bit of math instructions you can make it to 4.....20mA. Have luck. Tomy the Master.
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8/10/2009 10:43 AM	Rate (0)
Aristotelis Posts: 147 Rating: (34)	[code] Network 1 LD SM0.0 MOVW AIW0, VW0 Network 2 LD SM0.0 AW= VW0, 16000 // Compare with 16000 (10mA) = Q0.0 [/code] Regarding the value 16000, this depends on the calibration you have done. As almost always the current fluctuates between a small range, I do not recommend using the equality comparison. Change it accordingly, or specify a range if you like... Refer to the manual mentioned in a previous post, pp 412 for setting the Dip switches and calibrating the module. Keep in mind that the addressing I have used in the code above (AIW0) depends on how many analog input modules you have. Again, I am referring you to the manual for more info. Hope this helps Aristotelis
Aristotelis Posts: 147 Rating: (34)
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