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My NI 923x, 9227, 9225 is reading zero and I am getting Error 65538 or 65582

Hardware: PXI/CompactPCI>>Controllers

Problem:
I am using either a NI 923x, NI 9227, or NI 9225 to acquire analog signals. When I try to perform the acquisition following error is shown, and I get a value of zero on all my channels.

Error 65538 occurred at an unidentified location
or
Error 65582 occurred at an unidentified location

What is the reason for this error and how can I solve it?

Solution:
These errors are caused by not starting and stopping the acquisition, as described below.

NI-RIO version 3.0 and earlier:

Before NI-RIO 3.1, the error recieved for this was 65538.  The error is caused because the acquisition is not being started by using the FPGA I/O Node “ModX/Start” (where “X” is the number of the module). You need to wire a true boolean constant in the input “ModeX/Start” of this node. As shown in figure 1:

Figure 1. FPGA I/O Node Mod1/Start in true mode

Also it is required to use the FPGA I/O Node “ModX/Stop” (where “X” is the number of the module) at the end of the operation. You need to wire a true boolean constant in the input “ModeX/Stop” of this node (Figure 2).

Figure 2. FPGA I/O Node Mod1/Stop in true mode

These nodes are located in the Project Explorer window by expanding RT CompactRIO target >> Local Chassis >> FPGA Target >> ModX. They can be placed in the block diagram by simply dragging them from the project explorer onto the block diagram.

NI-RIO verision 3.1 and later:

You will not see error 65538 if you are using NI-RIO version 3.1 or later. The error code has been updated to include a more useful description. Instead you will see the following error:

Error 65582 occurred at an unidentified location

Possible reason(s):

CompactRIO:  (Hex 0x1002E) The operation did not complete because the acquisition has not started.  Use the Start and Stop channels to put the module in and out of acquisition mode.

The same solution as above applies to this error as well.

Note: This is information is valid when using any of the following modules:

- NI 923x
- NI 9227
- NI 9225

Related Links:
KnowledgeBase 4LCMH307: What are the Key Differences between the NI 9233 and NI 9234?
KnowledgeBase 42NC6EZN: How Can I Trigger a NI 9233 or 9234?

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Report Date: 09/03/2008
Last Updated: 04/01/2009
Document ID: 4P2D9P3Q

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