Farsun Photoelectric Science Technologies co. LTD FG2800 用户手册

 

     

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data 

RTS/CTS Option 2 

 

 

 

RTS/CTS Option 3: When Option 3 is selected, the scanner asserts RTS 

prior to any data transmission, regardless of the state of CTS. The scanner 

waits up to Host Serial Response Time-out for CTS to be asserted. If CTS 

is not asserted during this time, the scanner issues an error indication and 

discards the data. The scanner de-asserts RTS when transmission is 

complete. 

RTS/CTS Option 3 

 

ACK/NAK: When this option is selected, after transmitting data, the scanner 

expects either an ACK or NAK response from the host. When a NAK is 

received, the scanner transmits the same data again and waits for either an 

ACK or NAK. After three unsuccessful attempts to send data when NCK are 

received, the scanner issues an error indication and discards the data. 

 

ACK/NCK  

 

ENQ: When this option is selected, the scanner waits for an ENQ character 

from the host before transmitting data. If an ENQ is not received within the 

Host Serial Response Time-out, the scanner issues an error indication and