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5.9.2 Radio RX Timeout
When the scanner is used in a standalone layout (point-to-point or with multiple
readers) it can be configured to receive “asynchronous” messages from the host at
any time.
There are two modes which can enable the scanner to receive messages from the
host:
1) Enable “2 way” Communication Protocol – After the transmission of each
barcode, the scanner waits for an acknowledgement from the host
1
. A
message can be sent by the host accompanying this acknowledgement, or
in place of it, to display something on the screen or execute a command
(such as sound a beep sequence, turn an LED on or off, etc.). If no
acknowledgement or message is received from the host within a
programmable timeout duration, the radio will be switched off and an “error
transmission” beep will be sounded.
2) Independent of the Selected Protocol – The scanner can be configured to
keep the radio receiver “awake” for a defined period of time following each
transmission. Any message coming from the host1 before expiration of the
timeout is accepted. The parameter “Radio RX Timeout” is used for
specifying how long the scanner have to wait for a message after receiving
each code transmission.
In this mode, the radio can also be “awakened” by pressing the trigger.
The scanner can receive a message only if it is linked to the Base (i.e. the
scanner has been joined to the Base and has had at last one “valid”
transmission after the last power-on). Setting the “Radio RX timeout” value
to “00” specifies that the radio never goes into sleep mode (always awake
Æ the scanner can receive a message at any time). Choosing this setting
will, of course, consume battery life more quickly.
1
See Section 6.1 for Host to Scanner message formatting.
5.9.3 Power-Off Timeout
If this command is enabled, after the desired timeout in hours, the PowerScan
®
batteries are disconnected and all power consumption ceases. To restore power,
press the trigger once. The reader will now be ready to read codes.
Power-off does not affect configuration parameters.