INFICON HLD6000 Refrigerant Leak Detector Interface Description - Manual (Page 29)

LD Protocol 29
3.5 Error Messages
Telegram error handling
• Slave discards all characters until it receives a ENQ 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 (if status word Bit 15 is set 1)
In case of error: STX, LEN, Stw, Cmd and one Data-Byte (with error number) sent
Error No. Meaning
1
CRC-failure
2 Illegal telegram length
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