Printronix L5035 user manual Serial Parameters RS-232 And RS-422

Serial Parameters (RS-232 And RS-422)

The printer uses different response characters to represent buffer full and buffer empty, depending on whether it is online or offline. These response characters are listed in the following table:

Online State	Buffer State	Response Character
Online	Buffer Empty	CR
	Buffer Full	3
Offline	Buffer Empty	0
	Buffer Full	2

With the SERIES 1, 1 CH protocol selected, if the printer receives a Series 1 poll character from the host, the printer removes the poll character from its input data stream and discards it. After a delay, called the poll delay, the printer replies to the host by sending the appropriate response character, per the preceding table.

During a poll delay, if the printer receives another poll character, the printer merely discards it. However, if a transition (from buffer full to buffer empty or from online to offline) occurs during a poll delay, the printer sends the response character appropriate to the new printer state at the end of the delay.

If you enable the Series 1 Idle parameter, then whenever the buffer is less than 75% full, the printer sends a response character to the host every two seconds.

You can select the poll character and the poll delay time from the printer control panel. You can also enable or disable Series 1 Idle from the control panel. Descriptions of these parameters start on page 90.

NOTE: When using the SERIES 1, 1 CH protocol, be careful with the transmission of binary data (control codes, bit images, etc.) since the printer discards poll characters.

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