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DF PROFINET IO | PCI Latency Timer

Owned by Khaled Madi (Deactivated)
Last updated: 01.Feb 2021

Issue

LabVIEW stop running with an DMA-Error using a PN-PCI-Board.

Instructions

  • Reboot your PC to change in the BIOS menu.

  • in BIOS navigate to the tab Advanced and choose PCI Subsystem Settings .

  • change PCI Latency Timer to 128 PCI Bus Clocks , then Save and Exit.

    • At default this value is set to 32 Bus Clocks. i.e. a PCI member blocks the bus for 32 bus cycles, before it releases it. Since nowadays PCI members are rarely used, you can set this value to higher numbers.

This option is very mainboard specific. You will find more information about it in the mainboard manual.
Please do not make any changes to your system you can not redo.