Datalogic Scanning DS1100 SH2347 Power Standby and Serial Commands, Manual Scanning Interaction

Power Standby and Serial Commands

When the scanner is programmed for standby power operation (@B), the first character of the command is used to “wake-up” the scanner; it is not properly received by the scanner’s CPU. Therefore, when there is any possibility that the scanner is in standby mode, an extra space code should be transmitted before STX to ensure the scanner is “awake” before sending commands to it. If the scanner is not being operated in standby mode, the space has no effect on commands (space prefixed commands are properly decoded). Having sent the space code to “wake-up” the scanner, a 150 to 200 millisecond pause must be observed to allow the scanner’s CPU to complete its initial- ization tasks, during which time it is unable to accept serial com- mands before issuing the programming command. Failure to observe this delay causes the scanner to ignore the incoming command.

Communication Parameter Changes

All commands which affect serial communication are acted upon immediately. Therefore, when changing communication parameters (baud rate, word length, parity, etc.), the scanner will send the ACK Code, using the newly implemented communication parameters. There should be enough of a delay from the issuance of a communi- cation parameter setup command for the properly programmed host computer to modify its internal parameters and correctly receive the ACK code sent by the scanner. This is due to the internal, one second delay required for the scanner to update its internal EEPROM.

Manual Scanning Interaction

The decoder firmware makes no attempt to resolve conflicts between serial programming commands and manually scanned menu labels. If you plan to scan menu labels from the PSC Operator’s Manual, do not attempt serial programming, and vice versa. Serial commands are given priority over pending menu labels. For example, if you scan the menu label SET I 2 of 5 MINIMUM LENGTH and the scanner is wait- ing for a two-digit, minimum length code when a serial command is issued, the serial command is acted upon and the pending manual command SET I 2 of 5 MINIMUM LENGTH is ignored.

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