PC-516 Fails NI-DAQ Test when EXTCONV Pin is Connected to an External SourcePrimary Software: Driver Software>>NI-DAQPrimary Software Version: 6.0 Primary Software Fixed Version: N/A Secondary Software: N/A Hardware: Legacy DAQ Devices>>Multifunction DAQ>>PC-516, Legacy DAQ Devices>>Multifunction DAQ>>PCI-700, Legacy DAQ Devices>>Multifunction DAQ>>PC-LPM-16
Problem: When I connect the EXTCONV pin to either an external function generator or to DGND, the device fails the NI-DAQ 6.0 test panels. If I disconnect the line, the device passes the NI-DAQ test. What is causing this problem? Solution: On the PC-516, 700, and PC-LPM-16 devices, you have two options for triggering analog input conversions. You can either use the onboard counter (Counter 0), or you can use the external convert pin. To use the external convert pin, the onboard counter must be deactivated and vice versa. If the external convert pin is pulled low or connected to ground, it turns off the gate for the onboard counter. When you run the NI-DAQ Configuration Test, the software tries to read data from the device, but no conversions occur because the EXTCONV is gating off the counter trigger. An error indicates that the device did not respond to the base address. The software indicates that the hardware interface is not operational. This behavior is normal. Related Links: Relation between CTRO and EXTCONV pins Attachments:
Report Date: 06/18/1998 Last Updated: 09/07/2004 Document ID: 1AHB5E2I |
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