Before buying parts, try a "cold boot" to clear the system cache. Turn the ignition to the position. Open the SD card flap and eject the card . Turn the ignition OFF and wait 60 seconds. Re-insert the card firmly.
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If you have a specific TNS510 hardware revision (e.g., Rev B, Rev C, or a clone module from a third party) and the error persists, post your oscilloscope captures and memory dump headers to industry forums like PLCTalk.net or the Industrial Repair Group. The community has thousands of field-tested solutions. tns510 program cannot be read better