Allen-Bradley 20F1AND186JA0NNNNN
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The Allen-Bradley 20F1AND186JA0NNNNN is a PowerFlex 700S series AC variable frequency drive manufactured by Allen-Bradley, a brand of Rockwell Automation. This unit belongs to the high-performance Phase II control platform of the PowerFlex 700S family, designed for demanding variable speed motor control applications requiring precise torque and speed regulation. The PowerFlex 700S series is engineered for applications where advanced closed-loop vector control and high dynamic response are critical requirements.
The 20F1AND186JA0NNNNN is rated for 186 amperes output current in a 400/480V AC input configuration, corresponding to approximately 132 kW (200 HP) at 480V. It supports Direct Quadrature (DQ) flux vector control and is compatible with DriveLogix embedded control, allowing Logix-based programming directly within the drive. The drive features multiple communication interface options through its modular architecture, supporting networks such as EtherNet/IP, ControlNet, DeviceNet, and Profibus DP via add-on communication modules. Integrated safety functionality is available through the Safe Torque Off (STO) feature, and the drive supports encoder feedback via its feedback module slots for precise closed-loop operation. The unit is designed for operation in ambient temperatures up to 50 degrees Celsius with appropriate derating and meets UL, CE, and cUL certification standards.
The PowerFlex 700S drive in this configuration is widely deployed in heavy industrial applications including metal processing, paper and pulp mills, material handling conveyors, extruders, compressors, and large pump and fan systems. Its high current rating and advanced vector control make it suitable for applications demanding tight speed regulation and rapid torque response, such as winding and unwinding systems and test stands. The drive's compatibility with the Rockwell Automation Integrated Architecture platform makes it a preferred choice in facilities already standardized on Allen-Bradley PLCs and SCADA systems.
Technical Specifications
| Series / Product Family | PowerFlex 700S |
|---|---|
| Input Voltage | 400 / 480V AC, 3-phase |
| Input Frequency | 50 / 60 Hz |
| Output Current (Continuous) | 186 A |
| Power Rating | 132 kW (200 HP) at 480V AC |
| Control Type | Closed-loop flux vector (DQ vector control), V/Hz |
| Feedback Interface | Incremental encoder, resolver (via feedback module) |
| Communication Interface | EtherNet/IP, ControlNet, DeviceNet, Profibus DP (via option modules) |
| Safety Features | Safe Torque Off (STO), hardwired safety disable |
| Embedded Controller | DriveLogix (Logix-based programming capable) |
| Operating Temperature | 0 to 50 degrees C (with derating above 40 degrees C) |
| Storage Temperature | -40 to 70 degrees C |
| Relative Humidity | 5 to 95% non-condensing |
| IP / Protection Rating | IP00 (open type chassis) |
| Certifications | UL, cUL, CE, RoHS |
| Mounting | Panel / cabinet mount |
Common Fault Codes
- Fault Code 2
- Auxiliary input fault. The auxiliary input interlock has opened, indicating an external fault condition has been signaled to the drive.
Check the external device wired to the auxiliary input terminals. Verify wiring integrity and confirm the external interlock device is functioning correctly before resetting the fault. - Fault Code 12
- HW OverCurrent. The drive output current has exceeded the hardware overcurrent trip threshold, typically 200-250% of rated current.
Check for a short circuit or ground fault on the motor cables or motor windings. Verify motor load conditions and acceleration ramp times. Inspect output wiring and motor insulation resistance. - Fault Code 13
- Ground Fault. Excessive current is flowing from one or more output phases to ground, indicating insulation breakdown or a wiring fault.
Disconnect the motor and test insulation resistance of motor cables and motor windings to ground. Replace damaged cables or motor if insulation resistance is below acceptable limits. - Fault Code 25
- Decel Inhibit. The drive is unable to decelerate at the programmed rate because the DC bus voltage has risen to the overvoltage limit.
Increase the deceleration time parameter. If the application requires fast deceleration, install a dynamic braking resistor or enable the bus regulation mode if available. - Fault Code 33
- Auto Restart Tries. The drive has exceeded the maximum number of automatic restart attempts following a fault condition.
Identify and resolve the root cause of the original fault before manually resetting the drive. Review the fault queue log to determine the initiating fault code. - Fault Code 71
- Adapter Loss. Communication has been lost with an installed option module or communication adapter in one of the drive option slots.
Check that the option module is fully seated in its slot. Inspect the module connector for damage or contamination. Replace the option module if reseating does not restore communication. - Fault Code 81
- Encoder Loss. The drive has detected loss of encoder signal on the feedback channel, which is required for closed-loop vector control operation.
Check encoder wiring, shielding, and connector integrity. Verify encoder supply voltage. Test encoder output signals with an oscilloscope. Replace the encoder or feedback module if signals are absent or corrupted. - Fault Code 100
- Parameter Checksum. The drive has detected a checksum error in stored parameter data, indicating possible memory corruption.
Reload parameters from a saved backup file using DriveExecutive or Studio 5000. If the error persists after reloading, the drive control board may require replacement.
Frequently Asked Questions
What is the continuous output current rating of the 20F1AND186JA0NNNNN?
The 20F1AND186JA0NNNNN is rated for 186 amperes continuous output current, corresponding to approximately 132 kW (200 HP) at 480V AC in normal duty operation.
What communication protocols does the PowerFlex 700S 20F1AND186JA0NNNNN support?
The drive supports multiple industrial communication protocols through its modular option slots, including EtherNet/IP, ControlNet, DeviceNet, and Profibus DP. The specific protocol available depends on which communication option module is installed in the drive.
Does this drive support closed-loop vector control with encoder feedback?
Yes, the PowerFlex 700S supports closed-loop flux vector control using encoder or resolver feedback via a compatible feedback option module installed in the drive. This enables precise speed and torque regulation required in demanding applications.
Is the 20F1AND186JA0NNNNN compatible with DriveLogix embedded control?
Yes, the PowerFlex 700S Phase II platform supports the DriveLogix embedded controller option, which allows Logix-based ladder logic and structured text programs to run directly within the drive without a separate PLC.
What is the enclosure rating of this drive and how should it be installed?
The 20F1AND186JA0NNNNN is an open-type chassis drive rated IP00, meaning it must be installed inside a suitable protective enclosure or cabinet that provides the required degree of protection for the installation environment.
Troubleshooting
Drive faults immediately on enable with Fault Code 12 (HW OverCurrent)
Disconnect the motor cables from the drive output terminals and attempt to run the drive unloaded. If the fault clears, the issue is in the motor or output wiring. Measure insulation resistance of motor cables and motor windings phase-to-phase and phase-to-ground.
Replace damaged motor cables showing low insulation resistance. If the motor winding insulation is degraded, the motor requires rewinding or replacement. If the fault persists with no motor connected, the drive output IGBT modules may be damaged and the power section requires inspection or replacement.
Drive displays Fault Code 81 (Encoder Loss) during closed-loop operation
Inspect the encoder cable for physical damage, loose connectors, or improper shielding. Verify the encoder supply voltage at the feedback module terminals. Use an oscilloscope to check for valid A, B, and Z channel signals from the encoder at operating speed.
Re-terminate any loose or corroded encoder connections. Ensure the encoder cable shield is grounded at one end only to prevent ground loops. Replace the encoder if output signals are absent or distorted. If signals are valid but the fault persists, replace the feedback option module.
Drive powers up but communication with the PLC or network is not established
Verify that the correct communication option module is installed and fully seated in the drive option slot. Check the network address, baud rate, and data rate settings in the drive parameters against the network configuration. Inspect the communication cable and connectors for damage.
Reseat the communication module firmly in its slot and cycle drive power. Correct any parameter mismatches in node address or data rate settings. Replace the communication cable if continuity testing reveals faults. If the module is confirmed faulty, replace the communication option module with a compatible unit.
Drive runs but motor speed is unstable or oscillating in closed-loop vector mode
Check the speed regulator (PI) tuning parameters in the drive. Verify encoder pulses-per-revolution setting matches the actual encoder specification. Confirm encoder wiring is properly shielded and routed away from power cables to prevent noise interference.
Run the drive autotune routine to recalculate motor model parameters. Adjust the speed regulator proportional and integral gains to reduce oscillation. Correct the encoder PPR parameter if it is set incorrectly. Improve encoder cable shielding and routing if electrical noise is identified as the cause.
Drive overheats and triggers a thermal fault during normal operation
Check that the ambient temperature inside the installation cabinet does not exceed 40 degrees C without derating. Inspect the drive heatsink cooling fans for operation and airflow blockage. Verify that the drive load current does not consistently exceed the rated continuous output current.
Clean any dust or debris from the heatsink fins and cooling fan blades. Replace failed cooling fans with manufacturer-specified replacements. Improve cabinet ventilation or add forced air cooling if ambient temperature is excessive. If the drive is consistently overloaded, review the application load profile and consider a higher-rated drive.
| Condition | Repair, Used, Refurbished, New in box (sealed) |
|---|
Common defects
Common defects on a Allen-Bradley 20F1AND186JA0NNNNN are:
Power Supply Related Issues
- No power / drive not turning on
- Blown fuses
- Defective rectifier bridge
- Damaged DC bus capacitors
- IGBT / MOSFET module failure
- Overvoltage / undervoltage errors
Control & Electronics Failures
- Faulty control board or PCB damage
- Firmware or memory corruption
- Fieldbus communication errors (Profibus, Modbus, EtherCAT, CANopen)
- Input / output circuit damage
- Gate driver module failure
Motor Control Problems
- Motor not starting or no output
- Unstable speed control
- No torque output
- Trip during acceleration or deceleration
- Encoder feedback errors
Thermal & Cooling Defects
- Overheating due to failed cooling fans
- Defective temperature sensors
- Poor heatsink performance
Mechanical & Environmental Damage
- Burnt or loose connectors
- PCB track damage
- Corrosion or moisture ingress
- Oil, dust or contamination damage
- Cracked solder joints
Error Codes & Drive Trips
- Overcurrent faults (OC)
- Ground fault / earth leakage error
- Short-circuit fault
- Motor or drive overload
- Overvoltage or undervoltage error
- Undervoltage trip when starting or stopping
- Phase loss / imbalance
- Synchronization issues with multiple drives
Other
- Display defect
- Control keys or keypad not working
- Parameters no longer readable or lost
- Brake resistor problems (brake chopper defect)
- Internal relays/contactors defective
- EMI/RFI interference due to defective filters
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