Inficon LDS3000 Modular Leak Detector Interface descriptio Manual de usuario descargar pdf (Pagina 48)

48 LD Protocol

5.5 Error messages

Telegram error handling

• Slave discards all characters until it receives a STX as telegram start identifier.

• Slave does not generate an error message, if address is not correct.

• Slave reports CRC errors with error message 1 (CRC failure)

• Slave reports length errors with error message 2 (Illegal telegram length) or 11

(Data length is not correct for the command)

To prevent the response from colliding with the next request, the slaves do not

respond in case of a timeout.

Error numbers (for Stw: Bit 15 to 1)

In case of error: STX, LEN, Stw, Cmd and one Data-Byte (with error number) sent

1 CRC-failure

2 Illegal telegram lenght

10 command doesn't exist

11 Data length is not correct for the command

12 Read not allowed

13 Write not allowed

14 Array-Index out of range or missing

20 Control actually not allowed with this interface

21 Password not OK

22 Command actually not allowed (e.g. calibration during Run-Up)

30 Data not in range

31 No data available

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Inficon LDS3000 Modular Leak Detector Interface descriptio Manual de usuario Pagina 48