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Chapter 2 Function Reference — Config_DAQ_Event_Message
NI-DAQ FRM for PC Compatibles 2-72
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National Instruments Corporation
Parameter Discussion
mode indicates whether to add a new message, remove an old message, or clear all messages
associated with the given device.
0: Clear all messages associated with the device including messages
configured with
Config_Alarm_Deadband and
Config_ATrig_Event_Message.
1: Add a new message.
2: Remove an existing message.
chanStr is a string description of the trigger analog channel(s) or digital port(s).
The channel string has one of the following formats:
xn
SCn!MDn!CHn
AMn!n
where
x:
AI
for analog input channel.
AO
for analog output channel.
DI
for digital input channel.
DO
for digital output channel.
CTR
for counter.
EXT
for external timing input.
n: Analog channel, digital port, counter, SCXI chassis, SCXI module number,
or AMUX-64T device number
SC: Keyword stands for SCXI chassis.
MD: Keyword stands for SCXI module.
CH: Keyword stands for SCXI channel.
AM: Keyword stands for AMUX-64T device.
!: Delimiter.
For example, the following string specifies an onboard analog input channel 5 as the trigger
channel:
AI5
When using messaging with an SCXI module in Parallel mode, you must refer to the channels
by their onboard channel numbers, not their SCXI channel numbers.
message i16 user-defined message
callbackAddr u32 user callback function address
Name Type Description