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Relay Output of LOGO alway on

Created by: Nguyen Phi Long at: 2/7/2017 3:46 PM (3 Replies)

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2/7/2017 3:46 PM	Rate (0)
Nguyen Phi Long Experienced Member Joined: 4/18/2015 Last visit: 5/20/2024 Posts: 72 Rating: (1)	We are using a LOGO 6ED1 052-1MD0-OBA8 This LOGO was installed for application with high frequency (about 1 Hz). Its output controlled 2 solenoid valve. But it work not smoothly and now one of output always on . Although program did not put that output on. I also checked manual of LOGO, it show that the switching capacity is about 0.8-1 million times. It mean that one output can be work well within 30 batch of my application (can not accecpt) Please help me check if this LOGO can be adapt with this application?

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2/7/2017 3:52 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/22/2024 Posts: 34442 Rating: (4294)	Are the solenoid valves equipped with free-wheeling diodes?

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2/7/2017 3:56 PM	Rate (0)
Nguyen Phi Long Experienced Member Joined: 4/18/2015 Last visit: 5/20/2024 Posts: 72 Rating: (1)	I am not sure. What happend if they were equipped ?

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2/7/2017 4:25 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/22/2024 Posts: 34442 Rating: (4294)	Take a look here: Contact protection circuit
	Last edited by: ixo65 at: 2/7/2017 4:27:49 PM
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