I have a question about the functions sysrestoreretains and syssaveretains. I am using these functions to save the retain data and to restore the retain using a usb port on my PLC. These functions work on my PLC. HOWEVER, they do NOT work if the file doesn't already exist at the target location. This is only a small nuisance.
Does anyone who has used these functions know if this limitation is due to my PLC or CoDeSys 2.3?
Related question - Once I save my retain data to my USB, I am not able to do any more reads or writes to the USB unless I remove the USB thumbdrive and re-insert the drive. Any ideas why this might be?
Thank you!
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It turns out that the firmware in the PLC was very old. When this PLC is returned to me, I will try updating the firmware and trying it again. Thank you for your input!
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Does anyone who has used these functions know if this limitation is due to my PLC or CoDeSys 2.3?
Thank you!
What PLC?
Festo CECX-X-M1
Thanks.
It turns out that the firmware in the PLC was very old. When this PLC is returned to me, I will try updating the firmware and trying it again. Thank you for your input!