Download 3500 Process Controller HA027988_15_3500

User Manual
28.6
3500 series Controllers
Step 4 – Deactivate OEM Security
Enter the code you used in step 3 into ‘Unlock Code’ to enable full iTools communication.
If an incorrect code is entered this parameter will become unavailable for a time period, indicated by
a warning message ‘Failed to write data to device’. This time will increase for each failed attempt
limited to 1 minute. If the correct code is entered while the time delay is in operation it will not be
accepted. It will be necessary to wait until the time delay is no longer operative (up to 1 minute) or to
power cycle the controller.
28.7
Erasing Memory
Since the OEM Lock/Unlock code is retained in ‘normal’ non-volatile memory, it may be erased by use
of the Access.ClearMemory (Cold Start) parameter, see section 3.4. Using this parameter to erase
AllMemory will not only unlock the OEM Security but it will also erase the application being
protected.
Note that the instrument must be in Config mode to accept the ClearMemory command.
This process may also be done via the SCADA area. The Instrument Mode parameter is already in the
SCADA area at address 199 - write a value of 2 to set Config mode. The Clear Memory parameter will
be found at address 16119. Set a value of 5 (AllMemory) to clear the memory.
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Part No HA027988
Issue 15
Jun-13