Incorrect PID Update Rate Error -70108 with NI 7340 and NI 7350 Controllers in MAXPrimary Software: Driver Software>>NI-Motion/FlexMotionPrimary Software Version: 7.6 Primary Software Fixed Version: N/A Secondary Software: N/A Hardware: Motion Control>>Controllers>>PCI-7350, Motion Control>>Controllers>>PXI-7340, Motion Control>>Controllers>>PXI-7342, Motion Control>>Controllers>>PXI-7344, Motion Control>>Controllers>>PXI-7350, Motion Control>>Controllers>>PXI-7352, Motion Control>>Controllers>>PXI-7354, Motion Control>>Controllers>>PXI-7356, Motion Control>>Controllers>>PXI-7358, Motion Control>>Controllers>>PCI-7340, Motion Control>>Controllers>>PCI-7342, Motion Control>>Controllers>>PCI-7344, Motion Control>>Controllers>>PCI-7346, Motion Control>>Controllers>>PCI-7352, Motion Control>>Controllers>>PCI-7354, Motion Control>>Controllers>>PCI-7356, Motion Control>>Controllers>>PCI-7358
Problem: I correctly set the PID rates in Measurement Automation Explorer (MAX) to valid values as described in the NI 7340 and NI 7350 hardware manuals and the "Enable Axes" VI/function help. When I try to initialize my controller from MAX, I receive error -70108 (NIMC_PIDUpdateRateError) rate specified is too fast for the number of axes and/or encoders enabled. What is wrong and what can I do to resolve this issue? Solution: This error may be caused by a bug in NI-Motion. Please make sure you are trying to use valid PID rate values before assuming the error is caused by the bug described below. A chart containing the valid PID rates for the NI 7340 and NI 7350 motion controllers can be found in the Enable Axes VI function help. If you have determined that you are selecting valid PID rates and you are still receiving error -70108, you have most likely run into a bug in NI-Motion that will be fixed in a future release. To get around this problem, use the Enable Axes VI to set the PID rate after you have initialized the motion card. Run the attached VI to manually set your PID rate through LabVIEW. Set your desired update rate on the front panel of the VI before running. Related Links: NI 7340 User Manual NI 7350 User Manual Attachments:
Report Date: 05/05/2008 Last Updated: 05/14/2009 Document ID: 4L4D461N |
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Manual PID Rate Adjust.vi