vadap started following a2n cpu problem write to plc the program I read before GX devloper
vadap posted a topic in MitsubishiHi all and nice to meet you here! I hope that someone with experience helps me and I hope in future to offer also my help to someone. I am having problem with a Mitsubishi plc with A2N (S1) cpu installed on a machinery. The machinery stayed 20 days switched off and with battery empty as I realised when switched on and the problems come out. I changed the battery but the problem didnt resolved. The plc gave error with stable error led and flashing run led on the cpu. Also an error led stable on a (double role) module of printer and ram. I have to say that I have never used GX developer environment before and it is my first contact with Mitsubishi plcs. Reading some manuals (found on the internet) and by using GX developer I read from plc the faults. Register D9008 was set at 12 error meaning MISSING END INS. I Followed the described flow charts from a2n manual for reseting faults but the situation was the same always as described above. I tried to read the program from plc and succeded to read it. It is a lader with about 6000 lines. Anyway I have no previous experience of the GX development environment but I tried to put the missing END in the program as sugested also by the flow chart in the manual. At this point I have to say that it was automatically added from gx developer as I can remeber from an appeared message. I verified also many times the program on gx developer with the plc and the only difference was that missing END at the last line of ladder program. Anyway I tried to write back to plc the program with correct end but it was not possible. I tried several times. The error mesages took with Gx developer was the following : "THE SAME T/C COIL EXISTS IN PROGRAM (MAIN) AND/OR PROGRAM (MAIN-SFC). THE VALUES ARE SET TO BE THE SAME AS IN THE FIRST FOUND T/C COILFROM THE TOP OF PROGRAM" "THERE IS A DEVICE IN THE PROGRAM (MAIN) THAT IS OUTSIDE OF THE RANGE. CHECK THE PROGRAM AND CORRECT THE DEVICE THAT IS OUTSIDE THE RANGE." Anyway I decided to delete the plc memory. After that the run was stop blinking and the error led went off. Only the error on the printer-ram module was on (This module was changed with a know functioning one witout any variation on behaviour). I thought that problem has gone now that the cpu is empty. I tried again to write the program to the plc but again i take the above mentioned messages. Now I have an empty plc and a program on the Gx developer that cannot be written to plc!!!!!!!!!!!!!!!!!!!!!!!!! I am desperate!!! I do not know how to proceed. I am not knowing the mitsubishi development environment. Other than Gx developer I tried to install the GX simulation but it not works to my computer. At this point I dont know even if the ladder program is somehow corrupted after the described above messages. I can sent the code (GX developer project) and any other information to someone expert, if necessary, to have an opinion. Please help!!! Let me know how to proceed!! I have to write back the code to plc !!!!! Thank you all in advance!! Now i realised that there is SFC that is my problem. Could someone help please? Big part of ladder is in yellow color. How can i proceed?