Using Specialty Digital Configurations With EtherCAT Expansion Chassis

Updated Aug 21, 2020

Reported In


  • NI-9144
  • NI-9145


  • NI CompactRIO

Issue Details

I want to use digital C Series modules in my NI 9144 or NI 9145 EtherCAT expansion chassis configured in a Specialty Digital Configuration. Is this possible?


Currently, there is no built-in ability to use Specialty mode in an NI 9144 or NI 9145 EtherCAT chassis.

The functionality desired by using a module in Specialty mode in an EtherCAT chassis can still be implemented, but should be done so through the FPGA.
To get started, see Do More with LabVIEW FPGA & C Series Digital Modules using CompactRIO. This link will show how to the basics of configuring FPGA code to setup a PWM or Frequency measurement that should give you similar functionality to the specialty modes configuration. 

Specialty mode can be used innately on non-EtherCAT cRIO chassis. See Specialty Digital Configuration and C Series Module Support for Specialty Digital Functions in Scan Mode to get started.