Inficon LDS3000 Modular Leak Detector Interface descriptio Manual de usuario descargar pdf (Pagina 17)

LDS1000 Protocol 17

Through the reset character <ESC> (27d or 1Bh) without <cr> the interface of the

LDS 1000 may be reset back to a defined state. A received string which might be

processed at that moment is erased and its processing is terminated. Receiving of

the <ESC> character is acknowledged by "OK<cr>" (In the case of the "TERMINAL"

program from Microsoft the character "O" is not displayed when the local echo is on).

Thereafter, the interface is ready to receive. Through this character its is easily

possible to check whether or not the data link has been properly installed.

3.2.1 Main functions

X1*)

Calibration: In the STANDBY mode, the internal calibration is started.

In the MEASURE mode, the external calibration is started. The status of the external

calibration may be queried through S12. Sequence of commands for external calib-

ration:

The internal calibration process is run automatically. There after, the LDS3000 will

be in the STANDBY mode.

Command Meaning

from the

LDS1000

Equivalent to key

or PLC input

LR Leak rate, date, time, output status

START

Start measurement mode,

suppress the background which

was measured upon operating

START

OK MEAS active

STOP

Stop the measurement mode,

display the current background

level

OK MEAS inactive

ZERO

ZERO mode on, suppress the

background which was measured

upon operating ZERO

OK ZERO active

ZERO OFF

ZERO mode off, display the

background which was measured

upon operating ZERO

OK ZERO inactive

CAL

x1)

Internal/external calibration OK CAL

CLEAR

Interrupt calibration/erase error

status

OK CLEAR active

Command

from the

LDS1000

Meaning

1START OK

The LDS1000 enters the measurement

mode, the calibrated leak must be opened,

wait until the signal has stabilised.

2 CAL OK External calibration is being started.

3 S12 1 External calibration is running.

4S12 2

Calibrated leak must be closed, wait until

the signal is stable.

5 CAL OK Calibration is continued.

6S12 0

Calibration complete, the LDS1000 is in

the measurement mode, the instrument is

running in the MEASUREMENT mode.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 55 56

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