If the computer is communicating with 7 bit word size with parity enabled, the 8th or parity bit is masked from the Port Select Code before it is examined, allowing you to send the Port Select Code with odd or even parity.
Factory default is $SELECT.
In multiple printer applications, you may select printer ports either anytime while printing or before the print job only. Mode A is a general-purpose mode and allows the computer to select a printer anytime while printing by sending a new port select sequence. Mode B allows the computer to select the printer at the beginning of printing only. In Mode B, the Model 24SII DES will recognize any port select sequence in the first 16 characters of the print job only. After the first 16 characters of the print job have been received, the Input Inactivity Timeout period must elapse before the Model 24SII DES will recognize another port select sequence.
Computer-to-computer communication is not affected by the Port Select Mode.
Factory default is Mode A: printer selection anytime while printing.
