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how we can convert 4 to 20mA signal from field instrument to 0 to 20mA PLC scale

Created by: Arif Ali123 at: 6/26/2012 7:46 PM (1 Replies)

6/26/2012 7:46 PM	Rate (0)
Arif Ali123 Posts: 1 Rating: (0)	how we can convert 4 to 20mA signal from field instrument to 0 to 20mA PLC scale.. for 4 to 20mA signal first we convert PIW to INTEGER then INTEGER to DOUBLE INTEGER and DI to REAL then DIVIDE BY 27648 and then multiply by our range factor e.g 10.0 and we get output for 4 to 20mA signal.. real output. HOW we can do for 4 to 20mA conversion first 0 to 20mA. thanks
Arif Ali123 Posts: 1 Rating: (0)	Last edited by: O_Moderator at: 6/28/2012 11:47 AM new subject after splitting from /tf/WW/en/Posts/43960#top
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6/26/2012 8:16 PM	Rate (0)
hdhosseini Diamond Expert Joined: 1/28/2009 Last visit: 8/31/2025 Posts: 6874 Rating: (1368)	Arif Ali123 how we can convert 4 to 20mA signal from field instrument to 0 to 20mA PLC scale.. for 4 to 20mA signal first we convert PIW to INTEGER then INTEGER to DOUBLE INTEGER and DI to REAL then DIVIDE BY 27648 and then multiply by our range factor e.g 10.0 and we get output for 4 to 20mA signal.. real output. HOW we can do for 4 to 20mA conversion first 0 to 20mA. thanks Hello, Check the attachment and the following examples: [code]// L PIW 200 // T MW 200 //copy the analog signal ////////////////////////////////// L MW 200 ITD DTR L 2.764800e+004 /R L 1.000000e+002 //range 0 to 100 *R T MD 50[/code] and this solution with FC105: [code] CALL "SCALE" IN :=MW200 HI_LIM :=1.000000e+002 LO_LIM :=0.000000e+000 BIPOLAR:=FALSE RET_VAL:=#ret OUT :=MD50[/code] attachment is only added to give you insight of digital representation of analog signals to their digitalized counterpart values.Full text here(section 5): http://support.automation.siemens.com/WW/view/en/8859629 Hope this helps Best regards Hamid Hosseini Attachment analog.jpg (269 Downloads)
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