Datalogic PowerScan PD8590-DPM, Руководство пользователя

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POWERSCAN D8590 User’s Manual
Other Communications Settings in ESP
Other Communications Settings in ESP
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 imager to the host in Raw format is sent without packet framing
or check characters. One-Way communication is in a raw format, no response is expected
from the host, and data is not resent.
Packetized 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. Two-Way communication is in packet format.
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 imager 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 imager 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 imager
will wait for an acknowledgement from the host before re-sending data.