National Instruments Welding System 321645c-01 Manual De Usuario
Chapter 2
Function Reference — DIG_Out_Grp
NI-DAQ FRM for PC Compatibles
2-178
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National Instruments Corporation
DIG_Out_Grp
Format
status = DIG_Out_Grp (deviceNumber, group, groupPattern)
Purpose
Writes digital output data to the specified digital group.
Parameters
Input
Parameter Discussion
group is the group to be written to.
Range:
1 or 2.
groupPattern is the digital data to be written to the specified port. NI-DAQ maps
groupPattern to the digital output ports making up the group in the following way:
groupPattern to the digital output ports making up the group in the following way:
•
If the group contains one port, NI-DAQ writes the low-order eight bits of groupPattern
to that port.
to that port.
•
If the group contains two ports, NI-DAQ writes all 16 bits of groupPattern to those
ports. If the group contains ports 0 and 1, NI-DAQ writes the low-order eight bits to port
0 and the high-order eight bits to port 1. If the group contains ports 2 and 3, NI-DAQ
writes the low-order eight bits to port 2 and the high-order eight bits to port 3. NI-DAQ
writes to the two ports simultaneously.
ports. If the group contains ports 0 and 1, NI-DAQ writes the low-order eight bits to port
0 and the high-order eight bits to port 1. If the group contains ports 2 and 3, NI-DAQ
writes the low-order eight bits to port 2 and the high-order eight bits to port 3. NI-DAQ
writes to the two ports simultaneously.
•
If the group contains four ports, NI-DAQ returns a deviceSupportError. Use
DIG_Block_Out
to write to a group containing four ports.
Using This Function
DIG_Out_Grp
writes the specified digital data to the group on the specified device. If
you have not configured the specified group as an output group, NI-DAQ does not perform
the operation and returns an error. If you have assigned no ports to the specified group,
NI-DAQ does not perform the operation and returns an error. You must call
the operation and returns an error. If you have assigned no ports to the specified group,
NI-DAQ does not perform the operation and returns an error. You must call
DIG_Grp_Config
to configure a group.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
group
i16
group
groupPattern
i16
digital data to be written