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Hey i want to know that in mitsubishi A2SH-S1 CPU how can i determine that battery voltage is what and if battery voltage is low then i want to on an output so that i can change the battery with the new one so that my program does not gets erased. 

Hello! I'm running into a problem with a malfunctioning OD212 output card on my PLC.  I figure the problem has something to do with my wiring, because I've put 2 different cards in with the same results. The card is unable to switch any of the relays I have as outputs although the indicator lights on it are functioning as expected. The setup it is in is: A PA202 power supply, followed by a CJ1M CPU13 CPU, 2 ID211 input cards, and 3 OD212 output cards. The bad card is the second OD212. All of the other cards work fine, it's just this one that's been having problems.  8 of the terminals on the bad card are hooked up to relays that each draw 0.02A and two more are attached to relays that draw 0.05A. So in total that's 0.26A if all the outputs are on at the same time (which they never will be.) I saw someone was having a similar problem to me on the forum, which was solved by switching out the PA202 supply, but that didn't work in my case. I don't think the problem lies with the PLC or the card's placement in the rack because I switched the card's position with the one next to it (output card 2 switched with output card 3) and tested that card (output card 3 in output card 2's place) without hooking it up to the original wiring and it worked just fine. However, I was still getting the same issue with the bad card even though it was in a different position, leading me to believe that I fried it somehow. Some other quirks of the bad card are that its outputs do not turn on and off with the indicator lights like how the other OD212s do. Below is a link to a video that shows this. The bad card has already been switched with the one next to it in the video - so it's on the end, but it's original position was second to last. https://youtu.be/wTvvGCHFpsc ( you may want to watch it at half speed ) So what I'm wondering is: how am I frying these cards / Is the problem easy to fix or will I have to send them to Omron? Thanks in advance!  

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Good day, I have Allen Bradley Compact Logix PLC with few I/O cards, there are 5 analog output cards amongst them. Today one of the analog cards does not provide more then 3.8 Volt on the outputs. Any voltage between 0 and 3.8 V is supplied correctly, whereas anything above it results in 3.8 V only. The card does not report any errors to PLC. Other cards do not have this problem. The PLC was running non-stop for couple of years and yesterday it was turned off for an hour. The problem started right after this. I have checked the module settings and verified that the output is not limited to 3.8V Can anyone give any advice in regards to this situation?