Inficon LDS3000 Modular Leak Detector Interface descriptio Instrukcja Użytkownika Pobierz pdf (Strona 24)

24 Binary Interface Protocol

4 Binary Interface Protocol

4.1 Communication Parameters

4.2 Commands

On every command you have to acknowlede with a cmd number. In case of error

instead of a cmd number a error byte ( 230) is transfered.

Data format

Baudrate 19.200, 8 data bits, no parity, 1 stop bit

float 4 Bytes, IEEE754 (± 10

±38

), 3 Byte Mantissa,

1 Byte Exponent/Sign

unsigned long int [ulint]: 4 Bytes, integer without algebraic sign MSB …

LSB (0 … 4294967295)

unsigned short int [usint]: 2 Bytes, integer without algebraic sign MSB,

LSB (0 … 65535)

signed short int 2 Bytes, integer without algebraic sign MSB, LSB

(-32768 … 32767)

unsigned char [uchar]: 1 Byte, integer without algebraic sign (0 … 255)

unsigned char [uchar]: 1 Byte, character ASCII Code (0 … 255)

Nr Name Description Parameter Data

2 GetPv Fore vacuum pressure

Byte 0: unit (0-mbar,

1-Pa, 2-atm, 3-Torr)

Pv [float]

5 GetDeviceID Device type LDS2000Plus: 31dec.

GetGasballast

SetGasballast

Gas ballast valve

Byte 0: 0-off, 1-on,

2- main fail safe -on

GetCalFac

SetCalFac

Calibration factor

Byte 0: 0-Vacuum;

1-Sniff

Factor [float]

GetMass

SetMass

Measure mass [uchar, 2/3/4 for mass 2/3/4]

GetZero

SetZero

Zero (suppress background)

0-off

1-on

54 GetCal Read calibration state 0-int.Cal; 1-ext.Cal

0-inactiv; 1-active; 2-wait for

calibrated leak close (only

at external calibrations)

55 SetCal Start / Stop calibration 0-int.Cal; 1-ext.Cal

0-stop; 1-start; 2-finish (

TL close; only at external

calibrations)

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 55 56

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