Class Series Programmer’s Manual 7Control Code Command FunctionsIntroductionThe printer requires a special “attention-getter” character in order to receive a command sequence,informing the printer that it is about to receive a command and the type of command it will be. ControlCommands, System-Level Commands, and Font Loading Commands have their own unique attention-getter, followed by a command character that directs printer action.Attention-GettersThe attention-getters (e.g., “SOH”) are standard ASCII control labels that represent a one character controlcode (i.e., ^A or Ctrl A). Appendix A contains the entire ASCII Control Code Chart.Attention-Getter ASCII Character Decimal Value HEX ValueImmediate Commands SOH 1 01System-Level Commands STX 2 02Font Loading Commands ESC 27 1BTable 2-1: Control Code ListingsAlternate Control Code ModesFor systems unable to transmit certain control codes, Alternate Control Code Modes are available.Configuring the printer to operate in an Alternate Control Code Mode (selected via the Setup Menu, theKc command or, where applicable, the KD command) requires the substitution of StandardControl Characters with Alternate Control Characters in what is otherwise a normal data stream.Control Character Standard Alternate Alternate 2 Custom Command TypeSOH 0x01 0x5E 0x5E User Defined ControlSTX 0x02 0x7E 0x7E User Defined SystemCR 0x0D 0x0D 0x7C User Defined Line TerminationESC 0x1B 0x1B 0x1B User Defined Font Loading“Count By” [1] 0x5E 0x40 0x40 User Defined Label Formatting[1] See Label Formatting Commands, ^ set count by amount.Table 2-2: Alternate Control Code Listings; Note: Throughout this manual , , , , and ^, will be used to indicate the control codes.The actual values will depend on whether standard or alternate control codes are enabled for theparticular application.
