You are not registered yet. Please click here to register!

plc storereviewsdownloads
This board is for PLC Related Q&A ONLY. Please DON'T use it for advertising, etc.
Try our online PLC Simulator- FREE.  Click here now to try it.

---------->>>>>Get FREE PLC Programming Tips

New Here? Please read this important info!!!

Go Back - Interactive Q & A > - Interactive Q & A > LIVE PLC Questions And Answers

PLC training tools sale

Thread Tools Display Modes
Old February 26th, 2018, 12:18 PM   #1
United States

Cydog is offline
Join Date: Feb 2018
Location: Maryland
Posts: 116
1756-L61 ControlLogix 5561 with a new 1756-BA2 Battery. Still loses program

Good Afternoon ,

We have a ControlLogix 5561 controller. The maintenance group , powered down the machine and lost the program. The battery light was red. They replaced the battery with a 1756-BA2 battery , and the battery light is still red. This morning they powered down the panel and the PLC , and we lost the program again . Battery light is still red. There is not a place in properties to select to have it saved by by the battery , correct ? Have any of you seen this problem before ?

Thanks in advance
  Reply With Quote
Old February 26th, 2018, 01:05 PM   #2
United States

KuulKuum is offline
Join Date: Jun 2006
Location: Texas
Posts: 178
See this forum thread, specifically Ken Roach post #5
  Reply With Quote
Old February 26th, 2018, 06:00 PM   #3
United States

Archie is offline
Join Date: May 2002
Location: Orangeburg, SC
Posts: 1,820
There was a known issue with the L61 processors in which it would do exactly as you described. I do not remember the exact details, but it was listed on the AB web site a number of years ago. Maybe someone else will remember more details.
Expectations lead to disappointment. Appreciation leads to satisfaction.

AdvancedHMI - HMI Software without the license key hassles
  Reply With Quote
Old February 27th, 2018, 12:39 AM   #4

tarik1978 is offline
Join Date: Mar 2010
Location: casablanca
Posts: 445
As Archie said there is a knowing issue for the 1756-L6x Series B Controller

  Reply With Quote
Old February 27th, 2018, 01:47 AM   #5
United States

keithkyll is offline
Join Date: Jul 2005
Location: Heath, TX
Posts: 2,026
Originally Posted by tarik1978 View Post
As Archie said there is a knowing issue for the 1756-L6x Series B Controller

Can you post text? Link needs login/password.
  Reply With Quote
Old February 27th, 2018, 02:05 AM   #6
United Kingdom

cardosocea is offline
Join Date: Nov 2016
Location: Fields of corn
Posts: 1,246

What can I do about reduced battery life of ControlLogix 1756-L6x Series B Controllers?


The battery is being prematurely drained due to a component on the controller module.

Estimated failure rate, based on the supplier data and data gathered by Rockwell Automation is 14.2 parts per million. This equates to less than one (1) controller in seven hundred (700) experiencing this anomaly with a premature battery drain.


With the ControlLogix 1756-L6x Series B Controllers, the following issue exists:

Approximately 0.14% of Controllers manufactured between June 1st, 2006 and March 16, 2009 can realize an anomaly.

Note: The actual symptoms presented with this anomaly can take various forms, the most identified issues are:
1.The 1756-BA2 battery can be drained prior to the normally stated worst case estimates as shown below.
2.A new 1756-BA2 battery is installed and the 'BATT' indicator stays on.

If you have a module with the date code range and are experiencing anomalous behavior, contact technical support.


There are no temporary workarounds.

If you have determined you have one of the affected controllers, contact your local Rockwell Automation Sales and Support office to initiate a warranty exchange of the affected controller.

If the low battery LED is illuminated red or if the user program was written to monitor a low battery status, you can safely replace the battery while the controller is running.
  Reply With Quote
Jump to Live PLC Question and Answer Forum


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Topics
Thread Thread Starter Forum Replies Last Post
Failure to upload/go online, ControlLogix 5561 Jasondelane LIVE PLC Questions And Answers 34 February 27th, 2019 09:05 AM
Question ControlLogix battery and communications cajunconfigurator LIVE PLC Questions And Answers 3 June 17th, 2017 04:22 PM

All times are GMT -5. The time now is 02:36 AM.