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- Siemens
- 6SN1118-0NK01-0AA2
- 2-Axis Control-Loop Block
- Germany
- 356 × 51 × 178 mm
- 0.57 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0NK01-0AA2 is a SIMODRIVE 611 universal HRS2 digital control-loop block configured for two-axis resolver feedback and speed/torque setpoint control. It belongs to the SIMODRIVE 611 drive-converter system, where it processes control commands and motor feedback for compatible drive axes.
In a CNC machine tool, separate feed axes may need to follow their own speed or torque commands while maintaining closed-loop regulation. This module supports two independent drive-control channels within one control board. The associated power modules supply the motors, while resolver feedback provides the information needed for the configured control loops.
The HRS2 designation identifies the hardware generation associated with this version. Its two-axis resolver configuration makes it relevant to compatible machine-tool feed drives, industrial motion-control equipment, and machinery using the SIMODRIVE 611 universal drive architecture. The final application depends on the connected motors, feedback devices, power modules, and machine-controller interface.
This model uses speed/torque setpoint control rather than the positioning function identified by the related 6SN1118-1NK01-0AA2 designation. The distinction matters when replacing a control board: matching the two-axis arrangement alone does not establish that the control functions are equivalent.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model / Article Number | 6SN1118-0NK01-0AA2 |
| Product Family | SIMODRIVE 611 universal HRS2 |
| Product Type | 2-Axis Control-Loop Block |
| Module Configuration | Two-axis |
| Feedback Type | Resolver |
| Control Function | Speed / Torque Setpoint Control |
| Control Board Generation | HRS2 |
| Drive System | SIMODRIVE 611 universal |
| Control Architecture | Digital closed-loop drive control |
| Expansion Capability | Compatible optional interface modules |
| Typical Application | Compatible resolver-based industrial drive systems |
| Dimensions | 356 × 51 × 178 mm |
| Weight | 0.57 kg |
Product Features
- Two-axis control: Provides two independent drive-control channels on one control board.
- Resolver feedback: Supports compatible resolver-equipped motor configurations.
- Speed/torque setpoint interface: Handles the specified control mode rather than the positioning variant’s control function.
- HRS2 hardware generation: Identifies the module version for compatibility assessment in existing installations.
- SIMODRIVE 611 integration: Works with compatible power modules and the wider drive-control system.
- Optional interface expansion: Supports designated option modules where required by the machine configuration.
- Separate feedback channels: Allows each axis to use its corresponding resolver feedback and control parameters.
- Single-axis operating possibility: The two-axis control-board architecture can also be used in a suitable single-axis arrangement.
Working Principle
The 6SN1118-0NK01-0AA2 participates in two closed-loop drive-control channels. For each configured axis, the system receives a speed or torque setpoint and uses resolver feedback to regulate motor operation through the associated power stage.
A typical arrangement follows this sequence:
Machine Controller → Setpoint Commands → 6SN1118-0NK01-0AA2 → Power Modules → Motors
Motor Resolvers → Feedback Signals → Control-Loop Block
When the machine controller requests a change in motor operation, the control system evaluates the relevant setpoint and feedback information. The control-loop block processes the drive-control signals, while the power modules supply the electrical energy required by the motors. Each axis retains its own feedback and parameter requirements even though both control channels reside on the same board.
For example, a machine tool may use two feed axes to coordinate the movement of a tool assembly and a workpiece table. The higher-level controller supplies the movement commands, and the drive system regulates the motors according to the configured control mode. Actual motion performance depends on the motor characteristics, mechanical transmission, power-stage configuration, and control parameters.
Resolver compatibility is essential to this process. The resolver, feedback cable, motor configuration, and control board must form a compatible measurement and control chain. A module intended for resolver feedback should not automatically be substituted with one intended for sin/cos incremental encoder feedback.
The 6SN1118-0NK01-0AA2 does not supply the motors’ main power directly. It functions as part of the SIMODRIVE 611 system, working with the appropriate power modules, feedback connections, setpoint interface, and higher-level machine controller.
Role in the SIMODRIVE 611 Control Architecture
The 6SN1118-0NK01-0AA2 occupies the drive-control layer between the machine controller and the power stages. It processes control commands and resolver feedback for two axes, while the associated power modules drive the motors.
Machine Controller → Setpoint Interface → 6SN1118-0NK01-0AA2 → Power Modules → Motors
Motor Resolvers → Feedback Connections → Control-Loop Block
| System Component | Function |
|---|---|
| 6SN1118-0NK01-0AA2 | Processes two-axis resolver feedback and speed/torque setpoints |
| SIMODRIVE 611 Power Modules | Supply controlled electrical power to the motors |
| Compatible Siemens Motors | Produce the required mechanical movement |
| Motor Resolvers | Provide feedback for the respective control loops |
| Higher-Level Machine Controller | Coordinates axis commands and machine sequences |
| Setpoint Interface | Transfers the required speed or torque commands |
| TERMINALS Option Module | Provides supported terminal-interface functionality |
| PROFIBUS Option Module | Enables compatible fieldbus communication where configured |
| Resolver Feedback Cables | Carry feedback signals to the control board |
| Motor Power Cables | Connect the motors to their associated power stages |
Industrial Applications
| Application | Typical Use |
|---|---|
| CNC Machine Tools | Controlling two compatible resolver-based drive axes |
| Machine-Tool Feed Drives | Regulating motor operation according to separate setpoints |
| Industrial Positioning Mechanisms | Controlling motor-driven axes within a larger machine |
| Metalworking Machinery | Supporting coordinated feed movements |
| Automated Production Equipment | Integrating two drive channels into the machine sequence |
| Material Processing Systems | Regulating compatible motor-driven mechanisms |
| Industrial Motion-Control Cabinets | Providing two-axis closed-loop drive control |
| Machine Tool Rebuilding | Replacing a control board after checking hardware and interface compatibility |
| Existing SIMODRIVE Installations | Maintaining resolver-based drive configurations |
| Multi-Axis Machinery | Managing two axes within a wider motion-control architecture |
Installation and Maintenance
- Verify the complete order number: Confirm 6SN1118-0NK01-0AA2 and distinguish it from the related 0AA1 version and the positioning variant.
- Check the HRS2 configuration: Verify that the installed SIMODRIVE 611 system supports the intended control-board generation and configuration.
- Confirm both motor types: Check that the connected motors and their resolver feedback arrangements are compatible with the control board.
- Verify power-module compatibility: Match each motor to its associated power module and confirm that the complete drive arrangement meets the application’s requirements.
- Isolate the drive system: Follow the prescribed electrical safety procedure and verify that hazardous energy has been removed before accessing the control unit.
- Inspect resolver connections: Check both feedback circuits, connectors, and cable routes for damage, loose contacts, or incorrect channel assignment.
- Review optional interfaces: Confirm whether the machine uses a TERMINALS or PROFIBUS option and verify the selected module’s compatibility.
- Check axis parameters: Verify motor data, speed/torque setpoints, control settings, and feedback assignments for both channels.
- Test each feedback channel: During controlled commissioning, confirm that each resolver signal corresponds to the intended motor and axis.
- Verify command assignment: Ensure that the machine controller’s setpoints are mapped to the correct control channels and associated power modules.
- Investigate abnormal responses: If an axis fails to follow its command, examine its feedback wiring, motor parameters, setpoint interface, power stage, and control configuration.
- Record the final configuration: Document the control-loop block reference, hardware generation, motor assignments, feedback connections, option modules, and commissioning results.
Compatible System Components
| Component | Function |
|---|---|
| Siemens SIMODRIVE 611 Power Modules | Supply the connected motors |
| Compatible Siemens Resolver-Based Motors | Provide mechanical movement and resolver feedback |
| Motor Resolvers | Supply feedback for closed-loop regulation |
| Resolver Feedback Cables | Connect the feedback devices to the control board |
| Motor Power Cables | Connect the motors to the corresponding power stages |
| Higher-Level Machine Controller | Generates setpoints and coordinates machine movement |
| Siemens 6SN1114-0NA00-0AA0 TERMINALS Option | Provides supported terminal-interface functionality |
| Siemens 6SN1114-0NB00-0AA2 PROFIBUS DP2 Option | Adds compatible PROFIBUS communication functionality |
| SIMODRIVE Commissioning Tools | Support parameterization and troubleshooting |
| Drive-System Documentation | Defines the required configuration and commissioning procedure |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Siemens 6SN1118-0NK01-0AA2 | 2-Axis Control-Loop Block | Two-axis resolver-feedback speed/torque control |
| Siemens 6SN1118-0NK01-0AA1 | 2-Axis Control-Loop Block | Related two-axis resolver-control configuration |
| Siemens 6SN1118-1NK01-0AA2 | 2-Axis Positioning Control Module | Resolver-based two-axis positioning |
| Siemens 6SN1118-0NJ01-0AA2 | 1-Axis Control-Loop Block | Single-axis resolver-feedback speed/torque control |
| Siemens 6SN1118-0NH01-0AA1 | 2-Axis Closed-Loop Control Module | Two-axis control with compatible sin/cos 1 Vpp encoder feedback |
| Siemens 6SN1114-0NB00-0AA2 | PROFIBUS DP2 Option Module | Adding supported PROFIBUS communication functionality |
Key Advantages
- Provides two independent resolver-based drive-control channels.
- Supports speed and torque setpoint control within the SIMODRIVE 611 architecture.
- Processes feedback from both axes for closed-loop regulation.
- Supports compatible interface expansion where required.
- Allows two-axis control within a coordinated machine-control system.
- Supports replacement planning based on the specific HRS2 generation and control function.
Technical FAQs
What is the difference between the 6SN1118-0NK01-0AA2 and the 6SN1118-1NK01-0AA2?
The 6SN1118-0NK01-0AA2 is the two-axis resolver version for speed/torque setpoint control. The 6SN1118-1NK01-0AA2 is the corresponding positioning variant. The correct choice depends on the control function required by the machine.
Can this control-loop block use sin/cos encoder feedback instead of resolver feedback?
The 6SN1118-0NK01-0AA2 is identified for resolver-based control. A motor using sin/cos encoder feedback requires a control-unit configuration that explicitly supports that feedback technology.
Can the two-axis module be used when only one axis is required?
The SIMODRIVE 611 universal HRS control-board architecture permits two-axis boards to be used in suitable single-axis applications. The power-module arrangement, motor configuration, and system setup must still be compatible.
What should be checked if the control board receives commands but the motor response is incorrect?
Check the resolver signal, channel assignment, motor parameters, setpoint scaling, associated power module, and configured control mode. Comparing the affected axis with its expected feedback and command values can help isolate the problem.