Communication Protocols; Intermec "Standard - Intermec 4630 User Manual

This chapter provides information on interfaces and protocols for integrating your
printer into a data collection network.

Communication Protocols

The printer supports the flow control and block transfer protocols described in
this section (all are Point-to-Point protocols except Multi-Drop protocol).
Applications and ROM BIOS determine which protocols your computer can
support. For more detailed information, refer to the Data Communications
Reference Manual (Intermec P/N 044737).

Intermec "Standard"

Intermec "Standard" protocol is a proprietary block transfer/status response
protocol. Except for single character status commands (<ENQ> and <VT>),
data is transmitted in message blocks beginning with the start of text (<STX>)
character and ending with the end of text (<ETX>) character. Message blocks
can be up to 255 or 512 characters, including the start of text and end of text
characters.
The printer returns its highest priority status when it receives a valid block
(<STX> data <ETX>) or when it receives the status request command <ENQ>.
When the printer receives the status dump command (<VT>), the printer
returns all active status. The printer status response time ranges from 30 ms to
100 ms depending on the complexity of the received message block. In the case
of a transmission error, the printer responds with a <NAK> and discards the
entire message block.
Printer status conditions in descending order of priority, status response
characters, and pin 11/20 states are shown below.
Printer Status
Buffer Already Full
Ribbon Fault
No Label Stock
Buffer Now Full
Printhead Hot
Offline (Paused)
Label at Strip Pin
Skipping
Printing
Ready/Online
Communications Reference
Character Pin 11/20
GS Busy
US Busy
EM Busy
DC3 Busy
SI Busy
DC3 Busy
FS Ready
DC1 Ready
DC1 Ready
DC1 Ready
B
B-3