Coherent FieldMaxII-TOP Manual do Utilizador descarregar pdf (Página 64)

FieldMaxII-TO User Manual

‘Start the data check timer

ScanForData.CheckTimer m_DevicesList

The device and device collection object may be persisted

to extend the lifetime of these objects beyond the scope

of the callback.

When a meter is removed, the DevicesList will be

current but the CallbackData.DeviceIndex search key

will not be valid since the device is gone.

Data Transmission

Notifications

Data transmission notifications are dispatched to the

application code through the IFM2DeviceEvents_

NotifyData callback method. The CallbackData object is

passed to the application. Data transmission types are

steered by testing the CallbackData.CallbackEvent

string. The CallbackEvent string will be one of the

following:

• “Fault”

• “ProbeRemoved”

• “ProbeAdded”

• “PowerOn”

• “PowerOff”

• “MeasurementData”

• “PacketIsOverrange”

• “OverTemperature”

• “MeasurementDataLost”

A reference to the cFM2Device object from which this

callback comes is obtained by indexing into the

DevicesList collection (persisted through the Notify-

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Coherent FieldMaxII-TOP Manual do Utilizador Página 64