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Logo Watchdog required

4/17/2018 4:57 AM	Rate (0)
hyo_eddie Experienced Member Joined: 12/25/2016 Last visit: 1/7/2026 Posts: 91 Rating: (0)	hello. I just want to ask if there is watchdog contact for the logo? (i.e. If the logo is turn-off or logo is faulty this contact will trigger.. I am using 0BA8 logo version..thanks

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4/17/2018 6:32 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/18/2026 Posts: 36470 Rating: (4552)	No, the LOGO! does not have a watch dog function in this sense. There is a diagnostic bit for Ethernet monitoring, which can be queried as an NI with a specific address. However, this monitoring does not work properly, only with direct coupling LOGO! and partner device. If there is a switch or a router in the connection, monitoring will no longer work in all cases. It is safer to program yourself a Watch Dog.

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4/17/2018 7:24 AM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/18/2026 Posts: 36470 Rating: (4552)	Here's an example. With the times of the on delays and the pulse generators you have to try for yourself how it fits best. The times of the on delays must be higher than the times of the pulse generators. Attachment Watch_Dog_FS4.zip (345 Downloads)

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