Printek 4500, 4503 Optional Coaxial/Twinaxial Interface, Automatic Port Switching, Introduction

OPTIONAL

COAXIAL/TWINAXIAL INTERFACE

Introduction

This appendix describes the automatic port switching between the coaxial/twinaxial port and the parallel port available as a part of this interface (this interface replaces the printer's standard parallel interface). This appendix also describes how to send control codes and escape sequences to the printer through the coaxial/twinaxial port. For information on installation and configuration of this interface, please refer to the FormsPro 4000 Series Operator's Manual.

Automatic Port Switching

For your convenience, a parallel interface is also provided as part of the coaxial/twinaxial interface. The interface will automatically switch to receive data from either the coaxial/twinaxial port or the parallel port after the time out specified on the configuration dip switches (SW1-7 & SW1-8).

The automatic switching will perform a Form Feed and reset the printer to the appropriate configuration as described in the following paragraphs each time a switch occurs. Some of the extra form feeds may be suppressed by selecting "FF at TOF: No" in the Interface menu. The automatic switching may cause unexpected results if escape sequences are being used and there are pauses longer than the specified time out in the data stream.

When data is received at the coaxial/twinaxial port, the interface will automatically switch the printer to Printek emulation and select the EBCDIC font. Therefore, the control codes and escape sequences described in the Printek Emulation chapter apply when received at this port. How to send control codes and escape sequences to the printer through the coaxial/twinaxial port is described below in the "Coaxial/Twinaxial Command Interpreter" section.

When data is received at the parallel port, the interface will automatically switch the printer to the default emulation selected in the Interface menu and select the default parameters set for the current form in the Forms menu. In this case, the control codes and escape sequences described in the chapter for the default emulation apply.

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