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Detecting an Unconnected Servo Drive on a Network in an Application with 4 Servomotors

11/28/2024 8:42 AM	Rate (0)
MedHabib Joined: 4/22/2024 Last visit: 7/29/2025 Posts: 30 Rating: (0)	Hello everyone, I’m working on an application that uses a PLC S7-1200 and 4 servo drives connected via a network (Profinet). I’m looking for a solution or a function in TIA Portal that can detect if one of the servo drives is not connected to the network. The goal is to generate an alarm or a message in case a drive gets disconnected to simplify diagnostics and maintenance. Do you have any suggestions or examples of how to implement this type of detection? Thank you in advance for your help!

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11/28/2024 4:05 PM	Rate (0)
Piotr.M Platinum Expert Joined: 6/24/2013 Last visit: 9/12/2025 Posts: 1696 Rating: (433)	Hi You can use OB86 rack or station failure to detect if drive is lost. Side note: it will not trigger when drive is disconnected at PLC startup - it will trigger when drive is lost during PLC run. sketch of OB86 [is attached] note: index of each device is governed by profinet device number set in HW Config. Profinet system is 100 to 102, again set in definition of profinet in hw config Attachment 29.11. Skektch of Block.txt (175 Downloads)
	Last edited by: Moderator_Lan at: 11/29/2024 07:44:01 Code attached
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11/30/2024 9:08 AM	Rate (0)
Hati Platinum Member Joined: 9/21/2012 Last visit: 9/10/2025 Posts: 4708 Rating: (510)	DeviceStates Is usefull to detect different status info from the Profinet devices.

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