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"No Comm" message in BOP-2 on G120C

Created by: dirk_ at: 7/6/2017 10:24 PM (5 Replies)

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7/6/2017 10:24 PM	Rate (0)
dirk_ Bronze Member Joined: 3/22/2014 Last visit: 3/19/2025 Posts: 101 Rating: (7)	Hi all, in my system I've got some G120C FW4.7.6 and a S7-1511 FW2.0. Every G120C has a BOP-2 panel. Some time (rarely) compare "No Comm" message on BOP. After a while the message disappear without any user operation. There is nothing related in inverter's diagnostic buffer nor in the PLC's system buffer. What this message refers to? Is related to Profinet communication with PLC? Thanks in advance

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This contribution was helpful to 1 thankful Users kid237

7/7/2017 4:01 AM	Rate (0)
kid237 Posts: 158 Rating: (3)	Hello Dirk, I have received this "No Comm" message a few times and I believe it could be due to no connection between the CU and BOP. I would normally unplug the BOP from CU and plug it in back, and it functions as normal again. I am pretty sure it is not related to profinet communication with PLC. Regards.
kid237 Posts: 158 Rating: (3)
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This contribution was helpful to 1 thankful Users dirk_

7/7/2017 1:28 PM	Rate (0)
dirk_ Bronze Member Joined: 3/22/2014 Last visit: 3/19/2025 Posts: 101 Rating: (7)	Thanks kid237, I had the same idea at the moment.. I'll try to unplug and plug, and I'll check if it will compare again. Thanks

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7/8/2017 10:25 AM	Rate (0)
automationguy123 Bronze Member Joined: 5/15/2010 Last visit: 6/4/2024 Posts: 172 Rating: (3)	Is this only reason, BOP`s D connector is not getting communicated with CU`s D connector?

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7/8/2017 10:56 PM	Rate (0)
dirk_ Bronze Member Joined: 3/22/2014 Last visit: 3/19/2025 Posts: 101 Rating: (7)	I tried to search in BOP-2 manual but I can't find anything: https://support.industry.siemens.com/cs/it/en/view/109483379

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7/12/2017 3:06 PM	Rate (0)
Technology Team Platinum Expert Joined: 10/11/2006 Last visit: 3/24/2025 Posts: 5980 Rating: (827)	Hello Dirk, Check, whether the hand mode is off. Check whether the aux. supply is sufficient, the line supply is connected. If the BOP2 is mounted in a door check, whether the original cable is used, which is delivered with the door mount kit.
	With best regards, Technology Team Application consulting and pre sales support for SINAMICS, SIMATIC Technology, SIMOTION, SIMOTICS and MOTION CONNECT
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