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CPU314C-2 PN/DP integrated Analog input Problem!

Created by: Sardar99 at: 6/13/2012 11:02 PM (8 Replies)

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6/13/2012 11:02 PM	Rate (0)
Sardar99 Posts: 13 Rating: (0)	Dear All I have CPU314C-2 PN/DP, with 4 channels integrated Analog input that I need them for my project, I am recieving analog signal from weighing indicators ( I can choose 4-20mA or 0-10V), at the same time I am using Portal Step7 V11 for programming the the S7-300 CPU314C-2 PN/DP , I made the correct wiring for I and V also the hardware configuration for the analog inputs also I have tried both I & V from the hardware configuration but I can not receive the analog value from the input tags!!! I have tried a lot, any one could help me if I forgot something will be very appreciated. thanks and best regards
Sardar99 Posts: 13 Rating: (0)
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6/13/2012 11:21 PM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 9/8/2024 Posts: 12282 Rating: (2682)	Hello Sardar; What addresses are you using in your program for the analog inputs? It is a common error to forget that the integratedanalog inputs of a CPU 314C-PN/DP are located at addresses PIW 800-PIW 808, and cannot be changed. Check to see what your HWConfig shows about the CPU IO addressing. Also have a look at the specs of the CPU in this manual: SIMATIC S7-300 CPU 31xC and CPU 31x: Technical specifications Hope this helps, Daniel Chartier
	Last edited by: dchartier at: 6/13/2012 11:24 PM
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6/13/2012 11:27 PM	Rate (0)
Sardar99 Posts: 13 Rating: (0)	Dear Dchartier very thanks for your quick responce, acording to the hardware configuration the analog input by defalt starts from IW 800, 802, 804, 806, and can be changed!, but I leave it as defalt starts from IW 800, but still no any reading!
Sardar99 Posts: 13 Rating: (0)
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6/14/2012 1:14 AM	Rate (0)
dchartier Grandmaster-Expert Joined: 9/27/2006 Last visit: 9/8/2024 Posts: 12282 Rating: (2682)	Hello Sardar; Your Input Image table does not reach that high, reading IW800 is not possible. Try reading PIW800 and moving the value in say, MW100. Use a VAT table to display the transfered value from PIW800. If that works, you know ypou must use periferal addressing outside of the input image table zone. Hope this helps, Daniel Chartier

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6/14/2012 10:32 AM	Rate (0)
Sardar99 Posts: 13 Rating: (0)	Dear Dchartier Very thanks for your support, I solved the problem acording your recommendation, thanks again
Sardar99 Posts: 13 Rating: (0)
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11/7/2013 9:20 AM	Rate (0)
Paramasiva Posts: 2 Rating: (0)	Dear Sir/Madam, I am using 314c-2DP PLC to replace the existing CPU 314IFM. After replacement, it shown system fault and analog reading are unable to read. Can you please explain me more about your answer which was given to the similar problem? Hello Sardar; Your Input Image table does not reach that high, reading IW800 is not possible. Try reading PIW800 and moving the value in say, MW100. Use a VAT table to display the transfered value from PIW800. If that works, you know ypou must use periferal addressing outside of the input image table zone.
Paramasiva Posts: 2 Rating: (0)
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11/7/2013 9:36 AM	Rate (0)
Ste39 Platinum Member Joined: 1/21/2013 Last visit: 9/4/2024 Posts: 4620 Rating: (707)	Hi Paramasiva, You can attach it to us a screenshot of your old and new hardware configuration?

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12/18/2013 2:58 PM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 8/12/2024 Posts: 4104 Rating: (194)	new question published by AllanSoagis split to a seperate thread with the subject addressing for the first analogue output and the first analogue input CPU314C-2 PN/DP Best regards CS Moderator
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards CS Moderator
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1/4/2016 10:39 AM	Rate (0)
CS Moderator Moderator Joined: 9/1/2005 Last visit: 8/12/2024 Posts: 4104 Rating: (194)	New question published by s_vb is split to a separate thread with the subject CPU314C-2 PN/DP use first AO channel of Inbuilt Ai/Ao card. Best regards CS Moderator
	My Forum is the place to personalize your profile, track your topics, and maintain content that interests you. Best regards CS Moderator
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