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Committing changes to flash in test mode

Created by: powerk at: 1/29/2015 11:02 AM (4 Replies)

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1/29/2015 11:02 AM	Rate (0)
powerk Posts: 2 Rating: (0)	Hi, first time poster to this forum. I have a CPU551 TDC rack, and am requiring to make parameterisation changes online during test mode to a CFC function block. (ie a constant change). I want to commit this change permanently, but am unable to. I would prefer to do it via online mode. The process that I am using is......... a) Connect to the CPU551 via DUST1(com1). (I have also tried this process via TCP/IP with the same result.) b) Open the CFC page required c) Go into TEST / Online mode. There are no errors reported when I do this, I am running the correct project. d) I can see the offline value of the parameter as 5.0e-3 (blue text). I hover over the parameter in test mode and it shows that it is 0.00499999 (in yellow text). e) I then double click on the parameter, and change the value to 2.0e-3. It tells me the flash card is write protected. f) I then disable the write protect on the flash card, then change the parameter value to 2.0e-3 again and this time it doesn't give me the dialog error. I confirm when I hover over it in online mode that it is now 0.002000000 g) I then go out of Test mode , ie go offline. I reenable the write protect on the card. h) I Power down the TDC rack, wait 10 secs, then re-energise to check the change has been committed to flash. i) I go back into Test mode, and then it gives me a dialog saying that the offline project and the running system are different. I go into test mode to inspect j) The parameter that I previously changed has reverted back to the original 5.0e-3. I cannot get the parameter to commit the change permanently when in online mode. It will commit the change while the TDC rack is energised, though once the TDC rack is restarted it reverts to the original parameter setting. Any ideas?? Anyone seen this before?
powerk Posts: 2 Rating: (0)
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1/29/2015 11:25 AM	Rate (0)
KSN Platinum Expert Joined: 8/25/2006 Last visit: 8/22/2025 Posts: 2218 Rating: (282)	Hello. On original MC5xx flash cards the write-protection switch is under plastic cover and is inaccessible. Disable write-protection and try to do the same procedure again. You need not to switch on write-protection to be able to change parameters in online mode.

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1/29/2015 12:56 PM	Rate (0)
powerk Posts: 2 Rating: (0)	I appreciate you're response, though I don't believe this is the issue. As per my original post, "f) I then disable the write protect on the flash card, then change the parameter value to 2.0e-3 again and this time it does not give me the dialog error. I confirm when I hover over it in online mode that it is now 0.002000000". I am able to disable the write protect, well at least the CFC software does not give me a dialog telling me that write protect is enabled any more (there is a little switch on the front of the card). I enable/disable the write protect during the process to help determine that it is actually writing to the card. The change commits to the program, though it is ONLY when I power off/power on the TDC rack it reverts to the original setting.
powerk Posts: 2 Rating: (0)
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1/29/2015 1:41 PM	Rate (0)
KSN Platinum Expert Joined: 8/25/2006 Last visit: 8/22/2025 Posts: 2218 Rating: (282)	Do you have an original Siemens card MC5xx or not? Did you try to recompile and download your program?

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1/30/2015 2:41 PM	Rate (0)
miami Platinum Expert Joined: 8/31/2005 Last visit: 8/8/2025 Posts: 2198 Rating: (331)	Please disable thewrite protection and reboot. Restart the rack with disabled write protection. Try again to change the value. KSN Do you have an original Siemens card MC5xx or not? The MCxxcards does have two memory areas: The main (flash) memory anda additionally (eeprom) memory. The main memory holds the compiled program, the onlinechanges are stored in the additional memory. If you have a non SIEMENS card, it is possible, this additionallymemory is not handled correct. So if you have a non Siemens card,get a original one and try again.

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