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AO in Redundant I/O

Created by: MRG at: 5/2/2008 8:11 PM (18 Replies)

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5/8/2008 6:33 PM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	MRG But now I have new problem, that I recive all 20 mA in my lower address while my secound module is correct completly. Help me please. MRG: Can you explain what you mean by "my second module is correct completely"?
Phantom75 Posts: 2661 Rating: (279)
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5/8/2008 6:47 PM	Rate (0)
MRG Bronze Member Joined: 1/20/2008 Last visit: 11/5/2024 Posts: 120 Rating: (7)	Secound module is active and ok in power and connection.

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5/8/2008 7:06 PM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	MRG: Now I understand. Instead of 50% on each module, one module is 100% and the other is 0%, right? I'll have to think about this. What about the output after the diode circuit?
Phantom75 Posts: 2661 Rating: (279)
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5/8/2008 7:13 PM	Rate (0)
MRG Bronze Member Joined: 1/20/2008 Last visit: 11/5/2024 Posts: 120 Rating: (7)	Yes. right. After the diode circuit same as before that In my project AO set to I (4..20mA) . and when in measuring the voltage between pin 3 and 6 , it's about 6 volt. is it OK? Thank you
	Last edited by: MRG at: 5/9/2008 5:15 AM Last edited by: MRG at: 5/8/2008 7:15 PM
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5/9/2008 5:24 AM	Rate (0)
MRG Bronze Member Joined: 1/20/2008 Last visit: 11/5/2024 Posts: 120 Rating: (7)	Also for DI and DO, redundancy work correctly.

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5/9/2008 6:26 AM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	MRG: Check / trythe following: 1. When you are transferring 100% to the lower address (QW 512 for example), check what are the the values in periphery words for both lower and higher addresses (PQW 512 and PQW 768 for example). You can check this from variable table (VAT). Let me know what values you see. 2. Trytransferring 100% to both lower and higher addresses and check the mA readings and redundancy functionality. There is definitely a change in behavior after you fixed the PIP. Regards
Phantom75 Posts: 2661 Rating: (279)
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5/9/2008 7:50 PM	Rate (0)
MRG Bronze Member Joined: 1/20/2008 Last visit: 11/5/2024 Posts: 120 Rating: (7)	In our factory netural(N) connected to earth(PE) directly. Also control panel, every transmeters, valves and etc connect to earth(PE). is it OK(connection betweenN and PE in PLC system)?

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5/10/2008 12:15 PM	Rate (0)
Late Platinum Expert Joined: 1/7/2006 Last visit: 11/17/2023 Posts: 2705 Rating: (318)	Hi, Have you built in the diagnostic Block ? When not then please built in the diagnostic Block..... When built in, what are the messages then ?
	I hope that the answer will help, if you have still questions, don't hesitate to ask me. All the best, Late Never say never, think in solutions, not in trouble......
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5/13/2008 12:29 AM	Rate (0)
Phantom75 Posts: 2661 Rating: (279)	MRG: The connection between N and PE should not be a problem. Looks like the module that is reading 0 is passivated due to some fault. You can confirm this by calling FB453: RED_STATUS. If this is the case it means your RED_DEPA is not depassivating the module. Please check. Regards
Phantom75 Posts: 2661 Rating: (279)
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