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Your system number is NOT 0

Frequently Asked Questions

Written by Will Fraser

Updated at February 4th, 2026

Table of Contents

Brand: Models: Question:   Answer:

Brand:

  • AMX

Models:

  • NetLinx
  • NI-Series Controllers
  • NX-Series Controllers

Question:  

What is my system number?


Answer:

When using the different tools in NetLinx Studio for troubleshooting and file transfer there is often a mistake made in entering your system number. Your system number is NOT 0, you need to enter your REAL system number during these procedures. 0 as a system number is a programming "WILD CARD" per se, when writing your code and using 0 as the system number you are making your code "PORTABLE" this will allow the code to run on any master it is loaded to and it will adopt that system number. A "REAL" system number will be between 1 and 65,535.

During a file transfer it is not necessary to enter a real system number, however if you are loading code to a master that is part of a master to master configuration and you enter 0 as your system number you are going to load the code to the master you are currently connected to. Therefore by entering your REAL system number you are ensuring a file transfer to the correct master.

When using CONTROL A DEVICE, EMULATE A DEVICE and when setting up DEVICE NOTIFICATION OPTIONS you must enter the real system number.

The easiest way to find your real system number is to refresh your system online tree in NetLinx Studio. The very first line will say "System X Devices [IP Address]" where X is your real system number​.

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Brand: Models: Question:   Answer:

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Related Articles

  • AMX Subroutine Name Length
  • How To Send DGX Shell Commands From NetLinx Code
  • How to use #IF_DEFINED to set pre-compile conditions
  • Using a NetLinx Master to Monitoring a System
  • Using an Active Bargraph to Control Levels by Touching the Bargraph
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