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FX3u ERROR restart after a power failure blinking

Time:2016-4-19 2:14:51

FX3U, cre ERROR new ERROR project, without any changes, clear all parameters, and memory, an empty program to the PLC, runs normal, but restart after a power failure, ERROR light is blinking, 6402 error code, what is the reason?? Urgent!
Re:  Time:2016-4-19 11:17:00
Dependingour blinking situation, blinking after the power program may be lost. FX3U program is through the battery to keep the program after a power failure, if the program is lost after a power failure may be the battery problem. Thank you for your support of Mitsubishi Electric automation products, please call 400--free hotline for further information.
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