Axiohm 7156 Spezifikationen PDF herunterladen (Seite 122)

6-4 Chapter 6: Communication Interface

If the application sends data at 9600 baud and pauses between lines for

as short a time as 50 milliseconds, the printer will never be able to print

at full speed. However, if the application sends data at 19.2 K baud and

does not pause between lines, the printer will be able to print at its full

speed of 2400 lines/minute. The table below shows that with a pause

of 50 milliseconds after each line, the transmit time equals or exceeds

the printer process time, slowing down the printer, regardless of the

baud rate.

50ms Pause after Each Line

Characters/Line Lines/Receipt Transmit Time

(19.2 K Baud)

Process Time*

20 20 1.2 Seconds 0.5 Seconds

20 40 2.4 Seconds 1.0 Seconds

44 20 1.44 Seconds 0.5 Seconds

44 40 2.88 Seconds 1.0 Seconds

* Process Time is the time it would take the printer to process the data

if all transmitted data was present. (It is not the time it takes to print

the receipt.)

Example: 20 characters/line, with 20 lines = 0.5 seconds process time

for the printer. It takes 1.2 seconds to send the data to the printer at

19.2K-baud speed with a 50ms delay after each line. Thus the printer

would have to wait 0.7 seconds longer to receive the data than it could

process it if no delays existed and the transmission speed were faster.

The next table shows that with no delay between lines, the transmit

time is much less than the process time, allowing the printer to print at

full speed.

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Axiohm 7156 Spezifikationen Seite 122