Modbus Registers Remain Active After Task Stop – Why?

Overview

This article explains why Modbus registers may remain active after a task has stopped.

FAQ

Q. Why do Modbus registers stay ON after task completion?

In v3.5, Modbus data did not always immediately reflect the updated robot state after task execution stopped.
This caused external systems (PLC) to continue reading outdated values.

👉 Status:
This issue has been resolved in v3.6.

Troubleshooting

▶ Symptom

• PLC reads ON/Active status after task stops

▶ Possible Cause

• Delay in synchronization between robot state and Modbus output

▶ Recommended Action

• Confirm actual task state on robot
• Restart task if needed
• ✅ Upgrade to v3.6 (fully resolved)