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- Siemens
- 6SN1118-0DM23-0AA0
- Closed-Loop Control Plug-In Unit
- Germany
- 330 × 51 × 127 mm
- 0.838 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Siemens 6SN1118-0DM23-0AA0 is a SIMODRIVE 611-D closed-loop control plug-in unit for two-axis drive applications. It uses Standard Closed-Loop Control 2 and supports a direct measuring system with SPG-S voltage signals. The configuration supports up to two FDD axes or one MSD axis, depending on the drive arrangement.
In a CNC machine, accurate axis positioning depends on the relationship between commanded movement and feedback from the measuring system. This control unit processes drive-control information within the SIMODRIVE 611-D architecture, helping coordinate the movement of connected feed axes. Its direct measuring-system configuration is relevant where position feedback is obtained directly from the machine axis rather than solely from a motor-mounted encoder.
For example, a machine tool may need coordinated movement across two feed axes while maintaining the required positioning behavior. The control unit works with the associated drive modules, measuring equipment, and CNC control system to support that arrangement. The actual achievable performance depends on the configured drive hardware, feedback devices, motor characteristics, and control parameters.
The 6SN1118-0DM23-0AA0 is a plug-in control unit rather than a standalone drive or complete CNC controller. It must be matched to the surrounding SIMODRIVE 611-D hardware and the applicable software configuration. When replacing an installed unit, the axis arrangement, direct measuring-system interface, firmware version, and existing parameter configuration all need to be considered.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6SN1118-0DM23-0AA0 |
| Product Family | SIMODRIVE 611-D |
| Product Type | Closed-Loop Control Plug-In Unit |
| Control Type | Standard Closed-Loop Control 2 |
| Number of Axes | Two-axis configuration |
| Measuring System | Direct measuring system, SPG-S |
| Maximum FDD Configuration | 2 axes |
| Maximum MSD Configuration | 1 axis |
| Application | CNC feed-drive control |
| Installation Type | Plug-in control unit |
| Compatible System | SIMODRIVE 611-D drive architecture |
| Dimensions | 330 × 51 × 127 mm |
| Weight | 0.838 kg |
Product Features
- Two-axis control configuration: Supports the specified two-axis feed-drive arrangement.
- Standard Closed-Loop Control 2: Provides the control configuration identified by the product designation.
- Direct measuring-system support: Works with the specified SPG-S voltage-signal feedback arrangement.
- SIMODRIVE 611-D integration: Fits into compatible drive-system configurations.
- CNC feed-axis application: Supports machine-axis control within an appropriately configured CNC system.
- Configuration-specific selection: Allows the measuring-system and axis requirements to guide hardware selection.
- Plug-in construction: Integrates into the corresponding SIMODRIVE drive assembly rather than operating as an independent drive.
Working Principle
The 6SN1118-0DM23-0AA0 operates as the closed-loop control element within a SIMODRIVE 611-D drive system. It works with the configured measuring system and associated drive hardware to regulate axis movement according to the control commands and feedback available to the system.
A simplified control path is:
CNC Controller → SIMODRIVE 611-D Control Unit → Drive Module → Feed Motor → Machine Axis
Direct Measuring System → Feedback Interface → Closed-Loop Control
During machining, the CNC controller issues movement commands for the relevant axes. The drive system operates the motor, while the measuring system supplies position feedback. The control loop uses the configured feedback information to determine the difference between commanded and measured movement and adjust drive operation accordingly.
The direct measuring-system configuration is significant in applications where the measurement reflects the machine axis itself. Mechanical transmission elements such as couplings, screws, or gear arrangements can affect the relationship between motor rotation and actual axis position. Direct measurement can account for movement at the measurement point, provided the measuring device and control configuration are correctly installed and calibrated.
The unit’s two-axis designation must be interpreted alongside the specified drive arrangement: the product documentation identifies a maximum of two FDD axes or one MSD axis. It should not be assumed that every combination of two spindle and feed axes is supported.
When commissioning or replacing the unit, engineers need to check the measuring-system interface, connected drive modules, axis configuration, software compatibility, and stored parameters. Incorrect feedback configuration can prevent proper closed-loop operation or cause positioning errors.
Role in the SIMODRIVE 611-D CNC Drive Architecture
The 6SN1118-0DM23-0AA0 occupies the closed-loop control position in the drive system. It works with the CNC controller, power and drive modules, motors, and direct measuring system to coordinate the configured feed-axis movement.
CNC Controller → Closed-Loop Control Unit → Drive Module → Motor → Machine Axis
| System Element | Function |
|---|---|
| CNC Controller | Generates axis commands and coordinates machining sequences |
| 6SN1118-0DM23-0AA0 | Provides the specified closed-loop control configuration |
| SIMODRIVE 611-D Drive Module | Supplies controlled electrical power to the connected motor |
| Feed Motor | Converts electrical energy into mechanical movement |
| Direct Measuring System | Measures axis position for feedback |
| SPG-S Feedback Interface | Supports the specified direct measuring-system signal arrangement |
| Mechanical Transmission | Transfers motor movement to the machine axis |
| CNC Parameter Configuration | Defines the applicable axis and feedback settings |
| Drive-System Cabinet | Houses the associated control and drive hardware |
Industrial Applications
| Application | Practical Use |
|---|---|
| CNC Milling Machines | Controlling configured feed-axis movement during machining |
| CNC Turning Machines | Supporting closed-loop control of compatible machine axes |
| Precision Machine Tools | Processing direct position feedback within the drive-control loop |
| Multi-Axis Machining Equipment | Coordinating supported feed-axis configurations |
| Metalworking Machinery | Controlling axis movement in compatible SIMODRIVE installations |
| CNC Retrofit Projects | Replacing a control unit where the existing hardware and feedback configuration match |
| Industrial Machine Tool Systems | Integrating closed-loop control into a SIMODRIVE 611-D architecture |
| Positioning Equipment | Supporting axis movement where the specified measuring system is used |
Installation and Maintenance
- Verify the complete order number: Confirm 6SN1118-0DM23-0AA0 and distinguish it from related control units with different measuring-system or control configurations.
- Check the axis arrangement: Confirm whether the application uses the specified FDD or MSD configuration and remains within the unit’s supported axis arrangement.
- Verify measuring-system compatibility: Check that the direct measuring system and SPG-S voltage-signal interface match the installed configuration.
- Inspect the drive assembly: Confirm the intended plug-in position and compatibility with the SIMODRIVE 611-D hardware.
- Isolate the drive system: Follow the required electrical isolation and discharge procedures before removing or inserting the control unit.
- Check connectors and interfaces: Inspect the control and feedback connections for damage, contamination, or poor contact.
- Confirm software compatibility: Verify that the installed CNC and drive software versions support the intended control configuration.
- Preserve configuration data: Back up the relevant axis parameters and configuration information before replacing the existing unit.
- Verify measuring-system parameters: Check feedback scaling, direction, reference settings, and other parameters applicable to the configured measuring device.
- Commission the axis carefully: Follow the machine’s approved commissioning procedure and verify feedback direction and axis response before normal operation.
- Investigate positioning errors: Check measuring-system signals, mechanical transmission, drive connections, and parameter settings if the axis does not follow its command correctly.
- Document the final configuration: Record the unit reference, software version, axis assignment, measuring-system details, and commissioning results.
Compatible System Components
| Component | Function |
|---|---|
| Siemens 6SN1118-0DM23-0AA0 | Provides the specified SIMODRIVE 611-D closed-loop control configuration |
| SIMODRIVE 611-D Drive Modules | Supply controlled power to compatible feed or spindle motors |
| CNC Controller | Generates motion commands and coordinates machining operations |
| Compatible Feed Motors | Produce mechanical movement for the configured machine axes |
| Direct Measuring System | Supplies axis-position feedback |
| SPG-S Measuring-System Interface | Supports the specified voltage-signal feedback configuration |
| CNC Parameter Data | Defines axis behavior and measuring-system configuration |
| Drive-System Cabinet | Houses the control unit and associated drive equipment |
Recommended Related Models
| Model | Product Type | Typical Application |
|---|---|---|
| Siemens 6SN1118-0DM21-0AA0 | Closed-Loop Control Plug-In Unit | Two-axis Standard Closed-Loop Control 2 without the direct measuring-system configuration specified for the DM23 variant |
| Siemens 6SN1118-0DM13-0AA0 | Closed-Loop Control Plug-In Unit | Comparing a related Standard Closed-Loop Control 2 configuration |
| Siemens 6SN1118-0DM11-0AA0 | Closed-Loop Control Plug-In Unit | Applications using a related SIMODRIVE 611-D control configuration |
| Siemens 6SN1118-0DM33-0AA1 | Closed-Loop Control Plug-In Unit | Evaluating a related control-unit reference for compatible system configurations |
| Siemens 6SN1118-0DK23-0AA0 | Digital Closed-Loop Plug-In Performance Control Unit | Applications requiring the specified Performance control configuration |
| Siemens SIMODRIVE 611-D | Modular CNC Drive System | Coordinating compatible control units, drive modules, motors, and feedback devices |
Key Advantages
- Supports the specified two-axis closed-loop control arrangement.
- Accommodates a direct measuring system using the SPG-S interface configuration.
- Integrates with compatible SIMODRIVE 611-D drive hardware.
- Supports CNC feed-axis control where the hardware and software configuration match.
Technical FAQs
What does the direct measuring-system designation mean for this control unit?
The 6SN1118-0DM23-0AA0 supports a direct measuring system with SPG-S voltage signals. The feedback arrangement measures machine-axis movement at the configured measurement point rather than relying exclusively on motor feedback.
Can the unit control two axes in every SIMODRIVE configuration?
No. The specified arrangement supports up to two FDD axes or one MSD axis. The actual configuration must be checked against the drive modules, axis type, measuring-system interface, and CNC system requirements.
What should be checked when replacing a DM23 control unit?
Confirm the complete order number, axis arrangement, direct measuring-system connection, software compatibility, and existing parameter configuration. A related SIMODRIVE control unit may have a different feedback or control configuration even if it fits a similar assembly.
Why might an axis show a position error after the control unit is replaced?
Possible causes include incorrect measuring-system scaling, feedback direction, unsuitable parameters, a wiring problem, or a mechanical issue in the axis transmission. Verify the feedback signal and configuration before concluding that the replacement control unit is defective.