Description

NI-9148 Controller module
NI-9148 Controller module
Module Clips Drive controller servo motor
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My XNET device is not connected to any port. Why don”t you report an error when running the LabVIEW program?

Main software: Driver Software>>NI-XNET

Main software version: 1.0

Main software revision version: N/A

Secondary software: Driver Software>>NI-CAN

Hardware: Industrial Communications>>CAN>>NI PXI-8512 CAN/HS1 NI-9148 Controller module

Question:

I use CAN (Control Area Network) VIs to write data to the XNET (Extended Network) device PXI-8512 while running the program. I did not connect anything to the NI PXI-8512 XNET device when I ran the program. The second LED on PXI-8512 is off, indicating that the port is not activated but LabVIEW does not prompt an error message to indicate that no CAN frames have been received from other devices. Instead, the program continues to run as normal.

When I mistakenly connected the device to an interface device such as NI USB-8473, a similar problem also occurred. The first LED light on the device remains normal.

Answer:

This is the expected condition of an XNET device. In fact, the second LED light off means there is no communication between the hardware and XNET driver, but LabVIEW will not prompt an error. This is due to the way XNET driver handles errors.

The XNET processing mechanism distinguishes between errors and faults. Error refers to the execution issue of VI in XNET functionality or program diagram. A fault refers to a problem that occurs when executing to a specific node, and also includes communication issues. These information can be found in the NI-XNET hardware and software manual (refer to the relevant link section) according to “Fault Handling”.

Using an instance of XNET READ VI to report errors and implement error handling, LabVIEW interrupts code execution whenever a fault occurs. The XNET manual provides a great example of how to operate it.

PXIe-5450
PXI-2533
CROO-9104
CRLO-9012
CRKO-9104
CRJO-9042
CRJO-9022
CRIO-P048
CRIO-P004
CRIO-O104
CRIO-O022
cRIO-FRC
CRIO-9Q04
CRIO-9P33
CRIO-9O33
cRIO-9958
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cRIO-9116
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CRIO-90T8
CRIO-90E2
cRIO-9082
cRIO-9081
cRIO-9076
cRIO-9075
cRIO-9074
cRIO-9073
cRIO-9068
cRIO-9067
cRIO-9066
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cRIO-9064
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cRIO-9058
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CRIO-904W
CRIO-904Q
cRIO-9049
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cRIO-9043
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cRIO-9040
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cRIO-9038
cRIO-9037
cRIO-9036
cRIO-9035
cRIO-9034
cRIO-9033
cRIO-9032
cRIO-9031
cRIO-9030
cRIO-9025
cRIO-9024
cRIO-9023
cRIO-9022
cRIO-9014
cRIO-9012
CRIO-900R
cRIO-9004
cRIO-9002
CRII-9104
CRII-9004
cRI0-9118
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cRI0-9113
cRI0-9112
cRI0-9104
cRI0-9103
cRI0-9025
CRAQ-9179
GPIB-140A 186135G-01
NI-9853

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NI-9148 Controller module

Description

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