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575-2102 PLC don´t run after power-up

Created by: mazorin at: 7/24/2020 9:48 AM (7 Replies)

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7/24/2020 9:48 AM	Rate (0)
mazorin Posts: 5 Rating: (0)	We have a 575-2102 PLC which after a power off, do not return to run mode. It is neccesary to do a PLC partial and complete restart and force to Run mode every time throught Tisoft. Program is still remaining. This unit PLC was working properly some years before, and we was replacing for a 575-2103 for to keep the 575-2102 like spare. 575-2103 was broken (Plc good led off) after breakdown electrical supply, 3 months ago, after that, we have the problem with 575-2102. Please, could you give some idea Best Regards Thanks in advance
mazorin Posts: 5 Rating: (0)
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7/24/2020 11:28 AM	Rate (0)
SamTheEagle Bronze-Expert Joined: 2/10/2006 Last visit: 10/8/2024 Posts: 148 Rating: (12)	Hello, Use the Tisoft AUX functions to check if there is an error. Connect with Tisoft to the CPU and check the Statuswords. See attched documentation for details. Regards, Attachment troubleshooting.pdf (1152 Downloads)

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7/24/2020 12:45 PM	Rate (0)
mazorin Posts: 5 Rating: (0)	Hello Sam Thanks for your fast response Yes, when we power cycle, we have a Fatal Error Detected (Illegal Network) picture attached. We have a 575-2126 Series 505 remote I/O Annex Card in the PLC, to connect PLC to 5 units RBC 505. Could be any comunnication problem at the beginning power up PLC, because are power up at same time all system? At 575 Operational Status screen indicates that program is in RAM. Thanks for your support MIguel Azorín Attachment Fatal error detected Illegal Network.jpg (1178 Downloads)
mazorin Posts: 5 Rating: (0)
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7/24/2020 5:48 PM	Rate (0)
SamTheEagle Bronze-Expert Joined: 2/10/2006 Last visit: 10/8/2024 Posts: 148 Rating: (12)	hummm strange and when you do a complete restart the PLC runs again ? i would rather suspect an error with RAM memory. Did you try to do a clear memory in Tisoft and downoad the complete program ? Carlo

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7/25/2020 9:58 AM	Rate (0)
mazorin Posts: 5 Rating: (0)	I think that once time when PLC program was lost too, I cleared and reloaded the program by Tisoft. But I can try again. I remember that technical people did instalation, advice us power up first the cabinet that give power to the PLC año after the rest. After electrical supply shutdown and electricity returns, goes to all cabinet, but with previous PLC not problem, sometime program was lost for bad battery. Program or some information must be storaged at EEPROM? Thanks and Regards
mazorin Posts: 5 Rating: (0)
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8/12/2020 5:37 PM	Rate (0)
mazorin Posts: 5 Rating: (0)	Hello again Carlo Sorry, I think that I didnt answer propierly last time. When we do a complete restart, the PLC runs again, but really we do a complete restart and force to RUN at Plc Operational Modes. I don´t know if only to force to RUN will be enough. Another rare thing is that if I disconnect the battery, at power supply and plc doesn´t indicate any change. In this case, I believe that PLC must indicate red light Battery bad, isn´t it?. We are running production line at 24/7, when I will have the first opportunity to clear PLC and reload program I will do it. Thanks for your support Regards
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9/2/2020 4:26 PM	Rate (0)
SamTheEagle Bronze-Expert Joined: 2/10/2006 Last visit: 10/8/2024 Posts: 148 Rating: (12)	Hello Miguel, i'm not very familiar with the 575 PLC. attached is the 575 system manual which may be helpful. it seems to be possible to force the battery good signal to "always true", see the section about battery installation. Also, yes it could be that the program is stored in EEPROM. i believe in Tisoft you can configure which is the memory location for the program, RAM or EEPROM. you should be able to see this when you are online with Tisoft. This could potentially be a reason why you see illegal network after a power fail: when the battery is not connected or low, and the battery good signal is forced to always good, after a power fail the RAM memory will not be correctly initialized. if you make subsequently a complete restart the program will be copied from EEPROM to RAM and the CPU will run again as normal. But this is a hypothesis and you should check how the CPU is configured. Regards, Carlo Attachment 505-8201-3.pdf (1330 Downloads)

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11/5/2020 11:17 AM	Rate (0)
mazorin Posts: 5 Rating: (0)	Good morning Carlo I hope you are well out there. I have had the opportunity to completely delete the program from the plc and load it again. It has not worked, the same problem remains Attached photo how it is configured. I tried to load the program in the EEPROM, but it was not possible, it seems that this 575 model does not have EEPROM unlike the 545/555, as indicated in the manual that you sent and that I thank you. After a power outage, it appears according to the attached photo: FATAL ERROR = OPERATING SYSTEM FATAL ERROR LOOP FATAL ERRROR = OPERATING SYSTEM FATAL ERROR LOOP CARD ERRORS DETECTED --- USE F2 TO CLEAR LOOP ERRORS Pressing F2 to clean Loop errors indicates Illegal Network, and it is necessary to perform a Partial Restart, Complete Restart and Force the program to RUN, working correctly again, until the next power cut. The program seems to continue in RAM as indicated on the screen and the battery indicates OK, and with the tester it gives the expected 5 VDC at its terminals. If I disconnect it, the Battery not good indicator LED appears on the PLC, therefore the signal is not forced either. After a power cut, the power supply is OK, but the 6 LEDs of the 575-2102 are off: IOA, RUN, WDG, BMS, SYF and PCG After the Partial Restart and Complete Restart, the PCG led turns on, and after forcing Run, the RUN led turns on and it is ready to work. I am looking for some contradictory information in the LOOPS, due to "Loop card errors detected", in case there is a card or configuration dedicated especially to them. Thank you very much for your help and comments. Cheers Attachment Loop fatal error and configuration plc.docx (966 Downloads)
mazorin Posts: 5 Rating: (0)	Last edited by: mazorin at: 11/05/2020 11:23:33
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