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Is there a way to stop the logo program in case of no input signal in a defined time?

Created by: emrkut at: 7/13/2023 6:24 PM (3 Replies)

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7/13/2023 6:24 PM	Rate (0)
emrkut Joined: 8/4/2022 Last visit: 7/13/2023 Posts: 2 Rating: (0)	Hi, may I ask you if there is a way to stop the logo program in case of no input signal in a defined time? If yes, which function block should I use? Thanks in advance. Emrah Kutlu ------------------------------------------------------------------------------------------ Split from Stopping or resetting a LOGO program using a configured input (stop button).
	Last edited by: Jen_Moderator at: 07/14/2023 09:02:23 New subject after splitting
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7/13/2023 6:29 PM	Rate (0)
ixo65 Grandmaster-Expert Joined: 12/18/2014 Last visit: 12/6/2023 Posts: 31560 Rating: (3922)	You have no way of stopping the program with a stop command. There is no stop command for the LOGO! in any block. If you want to interrupt the program flow, you have to program your program accordingly.

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7/13/2023 6:43 PM	Rate (0)
emrkut Joined: 8/4/2022 Last visit: 7/13/2023 Posts: 2 Rating: (0)	Thank you for your support.

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7/13/2023 7:23 PM	Rate (0)
qwazee Platinum Member Joined: 3/30/2020 Last visit: 12/6/2023 Posts: 4073 Rating: (875)	emrkut Hi, may I ask you if there is a way to stop the logo program in case of no input signal in a defined time? If yes, which function block should I use? Thanks in advance. Emrah Kutlu You could build an electrical interlock that provides power to the LOGO!. For example a press of a button switches on a relay that provides power to the LOGO! The relay is retained until the LOGO! output switches on. But there are two possible problems. 1) The LOGO! take quite a while to switch back on. 2) A note from the manual: LOGO! System Manual, 10/2020, A5E33039675, page 324 When you switch on LOGO! 24CE/24CEo, LOGO! DM8 24 or LOGO! DM16 24, the CPU sends signal 1 to the digital outputs for about 50 μs. Take this into account, especially when using devices that react to short pulses. So -- please explain what your use case is. Perhaps it is to conserve power because a battery powers the LOGO! ?
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