User manual

HS-51/HS-51X Wireless Handheld Reader User Manual 4-15
Communications
Other Communications Mode Commands
Some ESP Communications options are unique to the software, and do not have corresponding
programming symbols. These options are explained below.
Reader Packet Format
Data that is sent from the reader to the host in Raw format is sent without packet framing
or check characters.
Packet data is sent with framing (a preamble communicating the amount of data to be
transmitted, and a postamble containing error detection) and check characters, and a
response is expected from the host.
Packet Mode Version 0 is a similar but more streamlined way of sending packetized data.
Reader to Host Packet Size
The Reader to Host Packet Size is the amount of data (in bytes) that is sent to the host in
packet format. This feature allows you to set the maximum allowable packet size.
Expect Host Response
When Expect Host Response is enabled, the reader will re-transmit data if it doesn’t
receive acknowledgement from the host.
Reader Send Retry Count
Reader Send Retry Count sets the number of times the reader will re-transmit data
before abandoning further send attempts. The minimum retry count is 1, which represents
the initial transmission.
Host Acknowledgement Timeout
The Host Acknowledgement Timeout is the amount of time (in seconds) that the reader
will wait for an acknowledgement from the host before re-sending data.