Omega Engineering EN-EIC-325-PCI, Руководство пользователя

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20
3.5.4. EVENT SIGNAL
#
Brief
Description
Name
Arguments (in C
Syntax)
Full Description
18
Set Source of Encoder's EventFlag
SetEncoderEventFlag Source
(long
CardHandle
,
short
EncoderNumber
,
short
EventFlagSource
)
Selects a condition that becomes the trigger of the Event Signal. Upon meeting this condition, an Event Signal is supplied, both in hardware and in software. Note: The characteristics of the signal are different in software and in hardware: * The polarity and the "hold mode" of the hardware signal are programmable (see functions #20–23). * The polarity of the software signal is constant. * The software signal is always held until activating the function
ReadInputs
(refer to section 3.4.2, function #8), which reads
the current signal status and then automatically clears it.
19
Get Source of Encoder's EventFlag
GetEncoderEventFlag Source
(long
CardHandle
,
short
EncoderNumber
,
short*
EventFlagSource
)
Gets the current selection of the Source of Encoder's EventFlag.
20
Set Polarity of Hardware Encoder's EventFlag
SetEncoderEventFlag Polarity
(long
CardHandle
,
short
EncoderNumber
,
short
Polarity
).
Sets the polarity of the hardware Event Signal.
21
Get Polarity of Hardware Encoder's EventFlag
GetEncoderEventFlag Polarity
(long
CardHandle
,
short
EncoderNumber
,
short*
Polarity
)
Gets the current status of the Encoder's EventFlag Polarity (active on high/low).
Note: The description of the common arguments is in section 3.6