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Software Handshaking (Cont'd)
XON/XOFF
An XOFF character turns the scanner transmission off
until the scanner receives an XON character. There are
two situations for XON/XOFF:
•
XOFF is received before the scanner has data
to send. When the scanner has data to send, it
then waits for an XON character before
transmission. The scanner waits up to 2
seconds to receive the XON. If the XON is not
received within this time, the scanner issues an
error indication and discards the data.
•
XOFF is received during a transmission. Data
transmission then stops after sending the
current byte. When the scanner receives an
XON character, it sends the rest of the data
message. The scanner waits indefinitely for the
XON.
5-34
LS 6000i Series Product Reference Guide
XON/XOFF
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