Request Packet Formats from the Host Computer
Request Packet Formats from the Host Computer

Request Packet Formats from the Host Computer

The first part of each data transfer Transaction is the sending of a Request Packet by the Host computer. The Request Packet contains a fixed length “Header” block and a variable length “Data” block. Each Packet sent from the Host computer to the Zebra printer must always use the following format.
The Request Packet Header Block is comprised of five fixed-length fields. The Request Packet Data Block is comprised of four fixed-length fields and one variable-length field. These fields are defined as follows.
Header Block
Data Block
SOH
DST. Z‑ID
SRC. Z‑ID
TYPE
SEQ. #
STX
FORMAT
EXT
CRC
EOT
1
3
3
1
1
1
≤1024
1
2
1