Skip to Content

Register Login

Industry Online Support

Technical Forum

Navigation

SM 336 System Fault

Created by: fratzman at: 1/22/2010 7:13 PM (3 Replies)

Rating (2)

Thanks 5

4 Entries

1/22/2010 7:13 PM	Rate (0)
fratzman Posts: 2 Rating: (0)	Hi all, i am facing a problem with the SM336 AI module in which 2 inputs seems to be faulty. The SF led is on and i am getting an alarm in the MP 277 panel. I had checked the input signals, which appears to be ok, although the alarm message mentions that is a faulty sensor problem. The system is redundant, based on S7 412-3 with CP 443-5 profibus processor and IM 153-2 modules. In the above equipment the status of the leds are: S7 412-3 -> SF on EXTF on CP 443-5 -> SF on EXTF on IM 153-2 -> SF on SM336 AI -> SF on I have to mention that in the second PLC of the system, both the input signals are ok. Do you think that this is SM336 or an IM 153-2 related problem? Since i am a rookie in those systems your help will be much appreciated. Thanks in advance.
fratzman Posts: 2 Rating: (0)
Suggestion To thank Quote Answer

1/24/2010 9:43 AM	Rate (1)
H-H Platinum Member Joined: 7/2/2008 Last visit: 9/14/2023 Posts: 928 Rating: (303)	Hello fratzman, It seems you have the old SM336 (6ES7336-1HE00-0AB0) which doesn't have a fault LED for each channel. The SF LED is a group error display and it's not channel specific. You should investigate yourproblem through SIMATIC Manager because this is the only way to figure out what's exactly going wrong. In case it's hard tohave SIMATIC Manageryou can try another thing but you may need to stop your plant for test purposes. 1- You can exchange suspected signals with healthy signals to see if fault is transferred to other channels (Check alarms in MP277). 2- You can exchange the SM336 to make sure it's not a faulty module (Don't forget DIP switches at the rear). Best regards. H-H

Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users fratzman

1/24/2010 10:14 AM	Rate (1)
Ayman Elotaify Platinum Expert Joined: 5/28/2008 Last visit: 9/25/2023 Posts: 4477 Rating: (830)	Hello, Another small piece of info., 1. DIP switches that H-H has mentioned to is too important. adjust them as it appears in your HW config. 2. Disable the non-used channels. regards,
	Ayman Elotaify
Suggestion To thank Quote Answer
This contribution was helpful to 1 thankful Users fratzman

1/25/2010 11:42 AM	Rate (0)
fratzman Posts: 2 Rating: (0)	Thanks for your replies. :) The problem was related with the AI card. I put a new card and and all the system faults was deleted. I wasnt able to connect the pc in order to see the fault buffer because of a connection error, so the next thing to do is to fix the connection issue. Thanks again for your replies.
fratzman Posts: 2 Rating: (0)
Suggestion To thank Quote Answer
This contribution was helpful to 3 thankful Users Ayman Elotaify H-H O_Moderator

|

Share this page:

Share this page on...

Follow us on