Notes:
1.Abnormal reception means that a parity error, framing error, overrun error, or count error has occurred.
2.Command or response transmission is retried only twice.
3.Upon reception, a command or response is checked for transmission errors. When the check result has no problem, ACK is returned immediately to the originating source. When the check result has problem, data other than ACK is returned after all data has been received.
INTERFACE SPECIFICATIONS
Response data | Details | Code (Hex) | ||
|
|
|
| |
ACK | A command or response has been | X 'FF' | ||
(Acknowledge) | received without an error. |
| ||
| Parity error | A parity error has been detected in | X'80' | |
error | ||||
| received data. |
| ||
|
|
| ||
Framing error | A framing error or an overrun error has | X '81' | ||
Reception | ||||
Overrun error | been detected in received data. |
| ||
|
|
| ||
Count error | The byte count for the command or | X '82' | ||
| response does not match the number of |
| ||
| bytes transferred. |
| ||
|
|
| ||
|
|
|
| |
4.The originating source of the command/response monitors the response from the receiving side. ACK indicates that command/response transmission is completed.
Reception error causes the command/response to be transmitted again. The transmission is returned only twice. After that, the scanner waits for a new command.
5.Response data such as ACK must be retried to the originating source within 0.5 second.
6.The interval between words in the data stream must be no more than 10 ms.
M3099EX/EH OEM Manual |