The “at1-236b” designation indicates hardware revision B and firmware version 2.36. Later revisions like “at1-240c” add Modbus TCP/IP and Ethernet/IP, but they cost nearly 40% more. The 236b remains popular because it avoids industrial Ethernet complexity.
| LED Pattern | Meaning | Corrective Action | |-------------|---------|--------------------| | Solid Green | Normal operation, motor energized | None | | Flashing Green (1 Hz) | Standby mode, motor de-energized after inactivity | Check enable signal or re-send step pulses | | Red flash every 2 seconds | Over-current trip | Reduce motor current setting or check for shorted motor windings | | Two red flashes, pause | Over-voltage (>85V) | Verify input supply voltage, check for regenerative braking spikes | | Three red flashes | Under-voltage (<18V) | Check power supply output, inspect DC bus capacitors | | Solid Red | Thermal shutdown (>85°C) | Improve cooling, verify heat sink mounting, reduce load duty cycle | Dnub-at1-236b- Driver
This separation of concerns makes the driver exceptionally reliable. There is no firmware to corrupt, no battery-backed RAM to fail, and no proprietary scripting language to learn. It accepts step and direction signals and produces motor torque—nothing more, nothing less. | LED Pattern | Meaning | Corrective Action
If the driver came with a setup.exe or install.msi file, it is best to run this plugging in the hardware. This allows the system to pre-stage the drivers so the device is recognized immediately upon connection. Troubleshooting Common Issues Driver Signature Enforcement If the driver came with a setup
Understanding the Dnub-at1-236b- Driver: Installation and Troubleshooting Guide