Beeper Off CR-LF Ack
If the scanner receives an unknown or improperly formatted code, or if the required parameters are missing or
Command | Function |
|
|
STX ESC PC ETX | Enable I 2 of 5 with check digit |
|
|
STX ESC PD12 ETX | Set I 2 of 5 minimum length to 12 |
|
|
STX ESC PE14 ETX | Set I 2 of 5 maximum length to 12 |
|
|
STX ESC KB31323334 ETX | Set Preamble to ‘1234’ |
|
|
STX ESC LB61626364 | Set Postamble to ‘abcd’ |
|
|
Serial Commands to Use with Caution
Some of the commands in this manual should not be used as serial commands because of the consequences they produce. All PSC scan- ners use the same hardware components to implement both serial communication and wand emulation. This means that all serial com- munication functions are disabled during wand emulation, and vice versa. Because of this, issuing any of the commands in Table 5 causes the scanner to enter its Wand Emulation mode, thereby disabling serial communication.
CB
CC
Wand Emulation, Code 39 Output
Wand Emulation, Same Code Output
Furthermore, because the scanner acts upon a command and then sends ACK or NAK, neither or these codes will be transmitted in response to any of the above commands. In Table 5 only the com- mand letters are listed; the complete command is prefixed with STX ESC, and suffixed with ETX. Because it is not possible to set (via serial command) two Wand Emulation parameters (emulation speed and polarity, for example), scanners to be used in Wand Emulation envi- ronments must be programmed by scanning labels from this manual.
32 | User’s / Programming Guide |