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CPU314IFM analog inputs problem

Created by: Donflore at: 1/28/2010 12:45 PM (3 Replies)

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1/28/2010 12:45 PM	Rate (0)
Donflore Posts: 21 Rating: (0)	Hi all, I have a problem with the analog inputs integrated in the CPU 314 IFM type 6ES7314-5AE03-0AB0, connected vor voltage measurement from some potentiometers. Right now all 4 AI reads aprox. same values, around dec. 21500 even if it is not wired or the voltage is adjusted between 0..10V. Are the analog inputs faulty?
Donflore Posts: 21 Rating: (0)
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1/28/2010 8:48 PM	Rate (0)
tomus50 Experienced Member Joined: 6/3/2007 Last visit: 4/14/2022 Posts: 49 Rating: (0)	i think you need a analog signal converter to use a potentiometer input. i like the ABB 1SVR040000R1700 universal convertor. tom

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1/29/2010 8:05 AM	Rate (0)
Donflore Posts: 21 Rating: (0)	I forgot to say that the AI worked fine, so I don't think that there is a need for other devices.
Donflore Posts: 21 Rating: (0)
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1/29/2010 4:36 PM	Rate (0)
H-H Platinum Member Joined: 7/2/2008 Last visit: 9/14/2023 Posts: 928 Rating: (303)	Hello Donflore, I've experienced a faulty channel in 314IFM with fixed reading value but other channels were working fine. You said that the AI signals worked fine but they give you the same value now even if they are not wired. Create and download a new projectand check the suspected channels again in case they are wired and in case they are not. If the values of peripheral analog inputs are still fixed (21500 dec.) without a change then it looks like you have defective AI channels. Best regards. H-H

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