Omron MicroHAWK Integration Manual page 340

Default/Reset/Save
Customer Default Parameters
Customer default parameters (saved by <Zc>) are the same set of parameters as power-on
parameters but are saved in a different, isolated section of NOVRAM. This allows a user
essentially to create a backup set of parameters that can be recalled in the event that the
current parameters or power-on parameters have been accidentally changed or are no
longer desired.
It is important to note that a hardware default does not affect customer default parameters.
For example, a user that has inadvertently changed communication settings and saved
them with a <Z> command, may not know the correct settings or have the capability to
communicate within those settings. By first doing a hardware default to restore the known
Omron Microscan defaults, the user can then recall the previous customer saved settings
with an <Arc> or <Zrc> command.
Omron Microscan Default Parameters
Omron Microscan default parameters are contained in the firmware and cannot be changed.
Software Defaults
Omron Microscan default parameters can be recalled (loaded into current settings) with
<Ard> command or recalled and saved for power-on with the <Zrd> command.
Hardware Default
If a software default and reset is not possible, it may be necessary to reset the reader by
shorting (connecting) specific pins. This procedure has the same effect as the <Zrdall>
software command.
Important: For this reset to occur, this command must be executed within 60 seconds of a
power-on or a reset.
1. Apply power to the reader.
2. Locate Pin 3 (Default) and Pin 7 (Ground) on the connector. (Access depends on wiring
configuration. May require an accessory cable).
Caution: Be certain that the correct pins are located. Connecting the wrong pins could
cause serious damage to the unit.
3. Momentarily connect the wires (or pins).
4. Within 3 seconds, disconnect and then reconnect the two wires again.
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MicroHAWK Engine Integration Guide