NCR 7870 manual RS-232 Terminator Byte

Chapter 7: Programming 7-47

RS-232 Terminator Byte

The RS-232 Terminator Byte programming mode controls the use of terminator bytes. If you use an RS-232 Terminator Byte, it goes at the end of the message sent to the host terminal. If you included a BCC, it follows the Terminator Byte and includes the Terminator Byte in the calculation.

When you apply power to an NCR 7875-2000, the reset function checks the RS-232 Communications Terminator Byte programming. If the selection is Disable, it is ignored and an ETX (03) is automatically sent with each message. If you select Enable, the ASCII code you programmed is sent.

Defaults

Parameter	Default Value
Terminator Byte	Disable
ASCII Code	03

Specific Program Parameters

Terminator Byte

The Terminator Byte parameter contains two selections: Disable and Enable. Scan the Hex 0 tag to disable the Terminator Byte, or the Hex 1 tag to enable it. The default is Disable.

ASCII Code

The ASCII Code parameter permits you to specify what ASCII code to use for the Terminator Byte. Enter your selection by scanning the appropriate two Hex tags (shown in the ASCII Code Chart). You can select any value from 01 through 7F; however, the recommendation is that you use the End Text (ETX) ASCII Code which is 03 Hex or Carriage Return (CR) which is 0D. Scan the two appropriate Hex tags