5/30/2018 11:53 AM | |
Posts: 45 Rating: (0) |
L.S., In my project the hardware is changed. A PtP-connection from the CP441-2 module is removed and 2 new AI-modules inserted. With switching on the power for the PLC I would like to upload the program (again) for the case we had to go back to the old situation. But the upload was very quick, there was no question about overwrite OB1 and in the upload only SFB's and SFC's are shown. So the next actions was to open the diagnotics of the PLC and there the message without timestamp 'DEFECTIVE' was shown. Followed by 'memory reset' See attachment. The laptop was powered on, the Simatic PC adapter USB 6ES7 372-0CB20-0XA0 was connected to the PLC and then plugged into the laptop. PLC is a CPU 412-2XG00-0AB0 marked with V1.2.0 at the front and in the diagnostic-tab 'general', yes I know it's old but not planned to replace. The powersupply is a PS 407 10A (407-0KA01-0AA0) and at the LED's I have seen the LED 5V blinking slow. Docu for the powersupply 'solved' this blinking, the FMR-key should (and is) pushed. The rack is 'earthed' with an approx 4mm2 wire. So, should I be suprised when this failure happens again Or should I start a replacement-action for the CPU, because the CPU is really defective? regards, Attachment20180530_BKM.zip (318 Downloads) |
5/31/2018 1:53 AM | |
Joined: 10/25/2016 Last visit: 9/1/2022 Posts: 199 Rating: (25) |
Hi Diagnostic say "Memory reset executed Initialization information: Memory reset due to inconsistent data Previous operating mode: STOP (memory reset)" That mean the data you're loading on the CPU are not correct and the CPU can operate using this data, so at the startup, the CPU erase everything. Try to Check you're HWConfig. For the 5V led take a look here : Fault/Error messages via LEDs Regards |
Last edited by: Jen_Moderator at: 6/1/2018 9:31:59 AMOptimized link. |
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5/31/2018 10:06 AM | |
Posts: 45 Rating: (0) |
Do I understand correct, that the hardware-configuration which was changed before switching on has triggered this 'memory reset'?? The software was not changed at the moment the PLC was switched on. The PLC was switched off 2 days before, battery is in good condition, no ram/eprom module inserted. In the period the PLC was off, there are inserted 2 new AnalogInput modules (431-1KF10-0AB0) and wired to the signals. The PLC is configured for StartUp even when Config is not as actual (see attachment). I didn't load any SW-program or HW-config before the PLC was switched on. The 5V-led was solved with the docu in that link, found it yesterday already. So still the question(s): regards, |
6/1/2018 7:33 PM | |
Joined: 10/25/2016 Last visit: 9/1/2022 Posts: 199 Rating: (25) |
Hi, "In the period the PLC was off, there are inserted 2 new AnalogInput modules (431-1KF10-0AB0) and wired to the signals." Have you add the 2 new Analog Module in HW Config? In case of Module addition you need to add it on HW Config and reload the config on the CPU. Regarding "startup if preset configuration doesn't match actual configuration", this option doesn't mean that the CPU will start in all case.. if you have a big difference between the HW Config and the rack the CPU will turn off, this message just mean "if the CPU detect some difference between the HW configuration and the actual configuration the CPU will try to start". In my opinion the problem don't come from the CPU but the rack, so you don't need to change the CPU yet. In some case the CPU reset the memory itself, for example if the program is too big, in some application the program create DB for data storage during the routine, in case of over storage the CPU turn off and reset everything at startup. In all case at the CPU startup the CPU check the configuration, if something is wrong the CPU turn Stop an in some case the CPU can also erase everything particularly if the data are inconsistent. Regards |
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