INFICON LDS3000 Modular Leak Detector Interface description - Manual (Page 27)

Binary Interface Protocol 27
LDS2010  HOST
4.3 Error messages
232  RS232Invalid  Temporary not allowed (example CAL during run up)
240  RS232Cmd  Command existiert nicht
243  RS232Len  Numbrer or length of parameters faulty
244  RS232Para  Parameter out of acceptable range
252  RS232Start  First character wrong (unlike 0x05)
253  RS232Checksum  Transmited and calculated Checksumme unlike
254  RS232Timeout  Timeout (Transmission of a command not completed after
500 msec )
255  RS232Buffer  Bufferoverflow (Overflow of the Receive-Buffers)
5 6 56 2 0 69
0x05 0x06 0x38 0x02 0x00 0x45
Start Len Cmd Para0 Para1 Checksum
Trigger Trig. 2 mbarl/s
7 57 52 0 217 89 166
0x07 0x39 0x34 0x00 0xD9 0x59 0xA6
Len Cmd Data Data Data Data Checksum
1.2E-7 (4-Byte float)