Optimizing Communication Delay on TM/Omron Robots

Context

When using a Robotiq gripper with a TM/Omron robot, occasional communication delays or failed commands—such as grip checks or position instructions—may occur due to RS‑232 signal conversion latency. Delays under 3 seconds can be considered normal in this context. These communication hiccups are relatively rare, but if they arise (e.g., 1 out of 800 attempts), here’s how to troubleshoot and resolve them. Blog Robotiq

Information

1. Troubleshooting Steps

To diagnose potential communication issues:

1. Verify the version of TM Flow being used.

2. Check the version of the Robotiq component.

3. Confirm the version of the RS‑232 to RS‑485 adapter in use.

   (Two types—old and new—are shown in the original article images.)

Old adapter	New adapter

Testing Communication

Create a simple test program in your TM environment that repeatedly:

• Opens and closes the gripper

• Includes a grip-check command

This will help you monitor for any delays or failures during operation

Recommended Solutions

If delays persist, follow this sequence of corrective actions:

1. Update TM Flow to the latest compatible version.

2. Update the Robotiq component to its latest compatible version.

3. Replace the RS‑232 to RS‑485 adapter with one of the correct version.

4. Even if the adapter appears identical, swap it out for a correctly modeled unit.

5. Test with alternative hardware—gripper, coupling, and cable—to isolate the issue.

6. If problems continue, contact Robotiq Support, providing details on the versions, tests performed, and hardware in use.