National Instruments 321645c-01 Welding System User Manual


 
Chapter 2 Function Reference RTSI_Conn
NI-DAQ FRM for PC Compatibles 2-290
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The second call could access another non-E Series MIO or AI device and use parameters
sigCode = 0, trigLine = 3, and dir = 0. This call configures the second non-E Series MIO or
AI device RTSI interface to receive a signal from trigger line 3 and drive it onto the non-E
Series MIO or AI device EXTCONV* signal. The total effect of these two calls is that the
non-E Series MIO or AI device EXTCONV* signal on the second device is controlled by the
OUT1 signal on the first MIO or AI device, thus controlling A/D conversions on the second
non-E Series MIO or AI device by a counter on the first.
Note If you are using an E Series device, see the Select_Signal function.
Rules for RTSI Bus Connections
Observe the following rules when routing signals over the RTSI bus trigger lines:
You can connect any signal to any trigger line.
RTSI connections should have only one source signal but can have multiple receiver
signals. Connecting two or more source signals causes bus contention over the trigger
line.
You can connect two or more signals on the same device together using a RTSI bus
trigger line as long as you follow the above rules.
You can disconnect RTSI connections by using either
RTSI_DisConn or RTSI_Clear.