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References
164 PowerScan™ M8500
Radio Parameters
Radio Protocol Timeout
This parameter sets the valid time to wait before transmission between the M8500 series
reader and BC-80X0 cradle is considered failed.
This parameter should be set taking into consider
ation the radio traffic (number of readers
in the same area).
If the RS-232 interface is used
with ACK/NACK enabled, this parameter should be at least
equal to the RX Timeout parameter for low traffic environments. It should be increased if
there are many readers in the same area.
It can be set between 2 and 19 seconds.
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. I
ndependent 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
b
een 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 the scanner can receive a message at any time).
Choosing this setting will, of course, consume battery life more quickly.
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.
1. See "Messages from Host to Reader" starting on page 169 for Host to Scanner message
formatting.
172


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