Intermec EasyCoder 4100, User Manual

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2
2-11
Installing the Printer
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Intermec “Standard” Protocol
Intermec “Standard” protocol is a proprietary block transfer/status response
protocol. With the exception of single character status commands such as
<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 characters, including the start of text
and the 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 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 in this table:
Printer status Character Pin 11/20
Buffer already full GS Busy
Ribbon fault US Busy
No label stock EM Busy
Buffer now full DC3 Busy
Printhead hot SI Busy
Offline (paused) DC3 Busy
Label at strip pin FS Ready
Label skipping DC1 Ready
Printing DC1 Ready
Ready/Online DC1 Ready
When the printer returns Buffer now full (<DC3>) status, the currently received
message block is accepted. At this time, the printer can accept short messages
to allow parsing of immediate commands such as Reset (<DLE>) or Cancel
batch printing (<EM>). However, if the printer responds with a <GS> to any
message block, it means that the buffer is already full and the entire message
block has been discarded.