Emerson I-0021 Manuel D’Utilisation

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NGA-2000 System Calibration
90003482(2) [NGA-e (MLT-Software 3.2.X)] 07/98
NGA 2000
Supplement - 25
4.2 Running system calibration
The system calibration is running in an own Task. This task is only allowed to run once. Any
try to restart this task is refused.
The main steps SYSCAL-Task has to do are realized in the following way.
1. Fill all actions to do into a sequence buffer.
2. Make some preparations before starting the actions
3. Work through the sequence buffer
4. Restore states and make some other finishing work
The contents of the sequence buffer depends on the type of SYSCAL (ZERO_ALL,
ZEROSPAN_ALL or USER_PROG). With the start command this type is delivered.
It is allowed to cancel the SYSCAL-task. This is realized by setting a parameter to a defined
value. This parameter is watched during step 3("working through the sequence buffer").
If a cancel is caused the task cancels its current action in step 3, works through step 4 and
ends.
Cancelling the SYSCAL-task per digital input will also disable any further starting action as
long as the digital input will stay at „cancel-state“.