I) V24/RS232/485-Interface - Basics

2.The test bench control computer is sending the control command STBY (Stand- by) to the system unit or any single analyzer.

There are two different cases:

AIf the system or the analyzer is resting, this mode will be finished. Then, it will be tried to get the stand-by mode ready for an error free measurement. The system or the analyzer will regulate all temperatures to the required setpoints, that were down during the resting. The FID will control the flame burning and if necessary it will try to ignite the flame etc. The operation mode of the system or analyzer is "stand-by" during these checkups, even if the device is not ready and error free. That means, the status STBY will be reported to the read command ASTZ. The test bench control computer can only realize with the read command ASTF (error status), if the device is ready for measurements. The device will be ready to measure, if the essential functions of the current measuring instruction will be error free.

Example:

The system or the analyzer is resting. No error is existing. The test bench control computer will ask for the operation mode:

Test bench control computer sends ASTZ Kn

→System or analyzer will response ASTZ 0 SREM SPAU

Test bench control computer sends STBY. System or analyzer shall accept the standby mode:

Test bench control computer sends STBY Kn

→System or analyzer will response STBY 0

The system or analyzer is finishing the resting. Then, it will try to get the stand-by mode for an error free measurement. The system or analyzer will check the conditions: Are all temperatures in the setpoint range ? Is the FID flame burning ? etc. The test bench control computer will read the operation mode:

Status is error free:

Test bench control computer sends ASTZ Kn

→System or analyzer will response ASTZ 0 SREM STBY or status has still some errors:

Test bench control computer sends ASTZ Kn

→System or analyzer will response ASTZ x SREM STBY

Test bench control computer sends ASTF Kn

→System or analyzer will response ASTF x n

The error status byte will be zero and the system or the analyzer will be ready to measure, if all temperatures are in the allowed setpoint range, if the FID flame is burning etc.

If these parameters are not correct, the error status byte will be different from zero. The test bench control computer will read the operation mode and the error status as long as the system or the analyzer will be ready to measure. The test bench control computer will control the maximum time for this reading.

90003752(1) [AK-Commands] 10/98

AK

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