I'm having a bit of trouble getting my PXI-2575 Relay Multiplexer and PXI-4071 DMM to talk to each other. They are located in a PXI-1045 chassis on which I am running the "niSwitch DMM Switch Handshaking.vi" example. At the moment all I am trying to do is read in a DC voltage using this example. SWITCH Topology: 2575/1-Wire 196x1 MuxScan list: ch0->com;Trigger input: Front ConnectorScan advanced output: Front Connector DMMMeasurement type: DC Volts[...] Measurement complete destination: ExternalTrigger source: External When attempt to run the VI, I get the following error: Possible reason(s):Driver Status: (Hex 0xBFFA6B9F) DAQmx Error -89120 occurred:Source terminal to be routed could not be found on the device.Make sure the terminal name is valid for the specified device. Refer to Measurement & Automation Explorer for valid terminal names.Property: DAQmx_DigEdge_AdvTrig_SrcProperty: DAQmx_DigEdge_AdvTrig_EdgeSource Device: PXI1Slot7Source Terminal: TrigInStatus Code: -89120 Obviously, I am new at this. Please help!Thanks.

Hey Sean, It sounds like we have a 2 volt differential signal. Let's use 2-wire 98x1 and make the following connections: From the switches help: From this, we can see in the bottom right corner that CH0+ is pin 1 and CH0- is pin 2. We should hook up the 2 volt signal to pin 1 and the ground to pin 2. We should hook up the DMM HI to COM+ (pin 173) and the DMM Lo to COM- (pin 174). Now all we need to do is open Switch Soft Sront Panel (Start»Programs»National Instruments»NI-Switch), select out topology (2-wire 98x1) and connect CH0 to Com. If we take a DMM measurement, we should now read 2 volts. Now that we've got everything working, let's make it faster using the handshaking example you mentioned previously:Suppose we want to connect channel 0 to com, take a measurement, then connect channel 1 to com, take a measurement, then connect channel 2 to com, etc... all the way up to channel 15 to com. A scan list that accomplishes this is: "ch0->com; ch1->com; ch2->com; ch3->com; ch4->com; ch5->com; ch6->com; ch7->com; ch8->com; ch9->com; ch10->com; ch11->com; ch12->com; ch13->com; ch14->com; ch15->com;". We can simplify this scan list using the ':', as follows: ch0:15->com. This equates to the same actions as above, but is much simpler to look at. Hopefully this is enough information to get started. Let us know if you have any questions. Have a great day! Message Edited by Knights Who Say NI on 01-25-2010 05:05 PM

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Help with niSwitch DMM Switch Handshaking example

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Thank you very much, works like a charm. Time to expand on this! I will post more as help is needed. Thanks again.

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Help with niSwitch DMM Switch Handshaking example

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