12.3.5 One Time Read
If this mode is set to USE, an identical ID won't be read twice within 30 seconds.
12.3.6 Max. User Setup
You can select the maximum number of user registrations; 10,000 or 20,000. If the maximum
number of registrants is set to 20,000, the maximum number of event transactions becomes
10,000.
CAUTION: Before changing the maximum number of users, you should
initialize the device.
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