Posted 10 Jul 2018 Hi All, Just to verify if the "memory card" , in attached document Page 4 highlighted area , provides Omron CJ2M CPU21 to retain memory when powered off? If yes, for how long can the memory lasts without being charged? Isit capacitor or battery? Thanks in advance. Regards, Summer cj2m-cpu31.pdf Share this post Link to post Share on other sites
Posted 10 Jul 2018 The memory card is a compact flash card. You would need to transfer information to the card to save it. The CJ2M has a battery for program retention and certain memory areas are retained when the power is off. Battery life mostly depends on the ambient temperature. Hope this helps. Share this post Link to post Share on other sites
Posted 20 Jul 2018 On 7/10/2018 at 0:03 AM, gtsuport said: The memory card is a compact flash card. You would need to transfer information to the card to save it. The CJ2M has a battery for program retention and certain memory areas are retained when the power is off. Battery life mostly depends on the ambient temperature. Hope this helps. Thanks for the respond, How long will the retained memory last if no power supplied to the PLC? Regards, Summerstone Share this post Link to post Share on other sites
Posted 20 Jul 2018 If the processor has a good battery, it will last as long as the battery. If no battery, it should last as long as the power supply capacitors hold a charge, typically about 5 minutes. Share this post Link to post Share on other sites
Posted 20 Jul 2018 17 minutes ago, gtsuport said: If the processor has a good battery, it will last as long as the battery. If no battery, it should last as long as the power supply capacitors hold a charge, typically about 5 minutes. So with good condition battery, how long in weeks or days? Share this post Link to post Share on other sites
Posted 20 Jul 2018 Years. Please see the attached graph from the W472 manual. 1 person likes this Share this post Link to post Share on other sites
Posted 20 Jul 2018 25 minutes ago, gtsuport said: Years. Please see the attached graph from the W472 manual. Thank you for this and your quick responses! Regards, Summerstone Share this post Link to post Share on other sites