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F8501 error on G120

Created by: last85 at: 12/3/2019 12:47 PM (4 Replies)

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12/3/2019 12:47 PM	Rate (0)
last85 Posts: 57 Rating: (0)	Hello to all. I have a problem. I have an S7-300 controller and two G120 drives connected to it via Profinet. The drive reference is sent via Profinet using the Siemens-352. The drives start and work fine from half a minute to minute, and then one by one they give an error F8501. Can anyone tell me what is happening and how to solve the problem? Thanks in advance.
last85 Posts: 57 Rating: (0)
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12/4/2019 6:08 AM	Rate (0)
PISCEAN 2010 Diamond Member Joined: 4/23/2010 Last visit: 11/23/2024 Posts: 8092 Rating: (884)	Hello, F08501 - Set point time out. Check value set in p2044 & try by increasing it. (You may confirm the update value in HW bus configuration) P.S. - Check ethernet connection.
	Last edited by: PISCEAN 2010 at: 12/04/2019 07:17:30 P. S. added
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12/5/2019 1:13 PM	Rate (0)
miami Platinum Member Joined: 8/31/2005 Last visit: 12/16/2025 Posts: 2198 Rating: (331)	Make sure, Bit 10 in the control word is always set to true.

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This contribution was helpful to 1 thankful Users kanchora

4/6/2023 6:58 AM	Rate (0)
binnho Member Joined: 9/29/2022 Last visit: 5/3/2025 Posts: 2 Rating: (0)	FÁBIO PEDRO, Fault mode analysis: "F08501-Profinet: setpoint timeout." possible Two root causes: CASE 1: Physical problem/Ethernet connection. One (or more) cables are faulty, so due to vibration or other things, they tend to disconnect. Check each cable, when everything is ok, move each cable and connector by hand to see if communication is failing (BF in PLC). CASE 2: Profinet packet traffic overload Very rare, check the parameter P 8840 (watch time of the communication board) and eventually increase it. But I really doubt that we are in this second case. Note: In this situation the potential failure was case 1.
	Last edited by: binnho at: 04/06/2023 07:00:57 Last edited by: binnho at: 04/06/2023 10:39:01
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4/6/2023 10:28 AM	Rate (0)
Jen_Moderator Posts: 8171 Rating: (174)	Hello binnho, Please try to discuss in English language. This is an international community, and we try to focus on one language. Posting in English will help you to get more response. This is the translation of your post: binnho Fábio Pedro, analysis and development in individual automation. Failure mode analysis: "F08501-Profinet: setpoint timeout." Two possible root causes: CASE 1: Physical problem/ethernet connection. One (or more) cables are faulty, so due to vibrations or other things they tend to disconnect. Check each cable, when everything is ok, move each cable and connector with your hands to see if the communication is faulty (BF in the PLC). CASE 2: Profinet packet traffic overload Very rare, check parameter P 8840 (communication board watchdog time) and increase it if necessary. But I really doubt that we are in this second case. Obs. in this situation the potential failure was case 1. Regards, Jen_Moderator
Jen_Moderator Posts: 8171 Rating: (174)
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