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Beckhoff TwinCAT - Troubleshooting

Troubleshooting of Beckhoff TwinCAT ADS instances and items

Written by Paul Bendixen

Updated at August 26th, 2021

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Articles in this section:

  • Beckhoff TwinCAT - Instance & item setup
  • Beckhoff TwinCAT - Troubleshooting
  • Setting up ADS Route in TwinCAT

Table of Contents

Error messagesInstanceItem

While we strive to deliver the easiest possible connection to your devices, all systems are fallible and here are some of the known issues

This article will describe some of the most common faults encountered when trying to connect to Beckhoff TwinCAT ADS devices. All the various error messages is also explained here.


Error messages

Both instance and items can have errors. These are showed on the portal and the following sections describes the error and how to solve them.


Instance

Error message Description Solution
Target port not found   ADS Server not started
The IP address is not responding. Check the IP address and that you can ping it. Ensure that SIA is in the same network as the ADS device.
Invalid ADS port
The ADS port is set incorrectly
Check that the ADS port is set correctly (e.g. 801, 811 etc.)



Item

Error message Description Solution
Symbol not found
The symbol was not found in the device
Check that you have spelt the name of the variable correctly.
Check that the instance is connected to the correct ADS device
Timeout elapsed
The item is correct, but reading it took too long time

Reduce the number of readings from the device, having the device on SIA Port X2 might also worsen this problem

Same error message on all items
This might actually be an error with the Instance
Check that your instance is set up correctly and that the ADS port is configured correctly for what the device reports

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Related Articles

  • Beckhoff TwinCAT - Instance & item setup
  • Setting up ADS Route in TwinCAT

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