Worthdata Inc B78 User Manual

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This parameter only applies to serial operation of a Base Station. 
 

None 0 
Host Controlled Acknowledge 

1 

 
"None" means that Base Station will immediately transmit an acknowledgement to 
the RF Laser from which it has just received transmitted data, (without waiting for 
a response from the host computer program.)   
 
If you want the host computer program to analyze the data and to send back 
different beep patterns to the laser scanner, enable Host Controlled 
Acknowledge. With this parameter enabled, the data is passed to the computer 
and no acknowledgement is sent to the scanner until the host computer replies to 
the base station with one of three possible ASCII codes: ACK (ASCII 06), BEL 
(ASCII 07), DC2 (ASCII 18). Upon receipt of these codes from the host 
computer, the base sends a signal back to the transmitting laser scanner that 
causes it to emit beeps as follows: 
 
                        ACK - one short beep in laser  
                        BEL - two longer low pitched beeps 
                        DC2 - three longer low pitched beeps 
 
 This allows the host computer program to give limited feedback to the 
scanner operator. 
 
Please refer to Host Response Delay to determine if you need to compensate 
for slow host program response by slowing down the retry time when failing 
to get a response from the base station.