6SL3040-1LA00-0AA0 SINAMICS S120 CU310-2 DP PROFIBUS Control Unit

The 6SL3040-1LA00-0AA0 is a SINAMICS S120 CU310-2 DP Control Unit developed for controlling an individual motor drive in a PROFIBUS-based automation system.

It performs the open-loop and closed-loop control functions required by a compatible power stage and motor while exchanging commands, operating values and diagnostic information with the machine controller through PROFIBUS DP.

Unlike the earlier CU310 DP model 6SL3040-0LA00-0AA1, this unit belongs to the later CU310-2 hardware generation and remains an active product.

Its distinguishing feature is the combination of dedicated single-drive control, integrated PROFIBUS communication and an onboard encoder interface for supported TTL, HTL or SSI feedback devices.

The controller also provides local digital and analog I/O for axis-related machine signals, making it suitable for distributed machine stations where each motor axis has its own local control unit.

The 6SL3040-1LA00-0AA0 is supplied without a CompactFlash Card. The correct card, firmware, project and licenses must therefore be confirmed separately before commissioning.

Key Features

• Current-generation CU310-2 DP controller
• Integrated PROFIBUS DP communication
• Dedicated single-drive architecture
• One DRIVE-CLiQ interface
• Onboard TTL, HTL or SSI encoder input
• Eleven digital inputs
• Eight bidirectional digital I/O
• One configurable analog input
• CompactFlash Card not included
• Active product

Typical Applications

• Packaging machine stations
• Conveyor drive axes
• Printing equipment
• Material handling systems
• Distributed production machinery

CU310-2 DP Single-Drive Positioning

The CU310-2 DP is intended primarily for one dedicated drive rather than centralized control of a large modular multi-axis group.

A typical axis may include:

• CU310-2 DP Control Unit
• Compatible Power Module
• Servo or induction motor
• Motor feedback device
• PROFIBUS network
• DRIVE-CLiQ component
• CompactFlash Card
• Approved drive parameters

This architecture is useful when machine axes are physically distributed and each drive requires local control and diagnostics.

PROFIBUS DP Communication

The integrated PROFIBUS DP interface connects the CU310-2 DP to the machine automation controller.

Typical exchanged data includes:

• Start and stop commands
• Speed setpoints
• Torque setpoints
• Positioning commands
• Actual speed values
• Drive status
• Warning messages
• Fault diagnostics

The PROFIBUS address, baud rate, telegram structure and PLC hardware configuration must match the original automation project.

Onboard Encoder Interface

A major differentiating feature of this controller is its onboard encoder evaluation interface.

Supported feedback configurations include:

• TTL incremental encoder
• HTL incremental encoder
• SSI absolute encoder without incremental signals

Official technical data specifies a maximum encoder frequency of 300 kHz and SSI baud rates from 100 to 1000 kBaud.

The exact encoder voltage, signal format, cable length and parameter settings must be checked before connection.

TTL and HTL Encoder Use

The onboard encoder input can be used where an external motor or machine encoder does not communicate through DRIVE-CLiQ.

Typical functions include:

• Motor-speed feedback
• Shaft-position monitoring
• Machine-position measurement
• Direction detection
• Closed-loop speed control

TTL and HTL feedback should not be confused with resolver or Sin/Cos 1 Vpp feedback, which normally requires a suitable Sensor Module.

SSI Absolute Encoder Use

The controller can evaluate compatible SSI absolute encoders without incremental signals.

This can support applications that require:

• Absolute machine position
• Position retention after shutdown
• Reference-point reduction
• External machine-axis measurement
• Material-position tracking

Encoder compatibility must be verified from the complete SSI interface specification rather than only the connector type.

DRIVE-CLiQ Integration

The CU310-2 DP provides one DRIVE-CLiQ connection for compatible drive components.

Depending on the drive design, DRIVE-CLiQ may connect:

• Compatible power-stage components
• Sensor Modules
• Terminal Modules
• DRIVE-CLiQ motors
• Motor feedback systems

Typical DRIVE-CLiQ functions include:

• Component identification
• Electronic nameplate transfer
• Parameter communication
• Status monitoring
• Fault diagnostics
• Topology detection

Integrated Digital Inputs

The controller provides eleven digital inputs for local axis and machine signals.

Possible uses include:

• Enable commands
• Limit switches
• Reference sensors
• Mode selection
• External fault signals
• Jog commands
• Machine interlocks

The exact terminal function depends on the configured drive project.

Bidirectional Digital I/O

Eight terminals can be parameterized as digital inputs or digital outputs.

When used as outputs, they can provide functions such as:

• Drive-ready indication
• Fault status
• Brake control signal
• Speed-reached status
• Position-reached signal
• Machine interlock output

The permitted electrical load and terminal configuration must follow the official technical data.

Configurable Analog Input

The CU310-2 DP includes one analog input that can be configured for voltage or current signals.

Supported ranges include:

• Minus 10 to plus 10 V
• Minus 20 to plus 20 mA

Typical applications include:

• External speed reference
• Torque reference
• Tension signal
• Pressure feedback
• Process correction signal

The analog input should not be described as a separate high-speed measurement module.

CU310-2 DP vs Original CU310 DP

CU310-2 DP

6SL3040-1LA00-0AA0

Later hardware generation

Active product

PROFIBUS DP

Onboard encoder interface

Distributed single-drive control

Original CU310 DP

6SL3040-0LA00-0AA1

Earlier controller generation

Legacy spare-part positioning

PROFIBUS DP

Used mainly for original machine replacement

Although both use PROFIBUS, they should not be treated as automatically interchangeable.

CU310-2 DP vs CU310-2 PN

CU310-2 DP

6SL3040-1LA00-0AA0

PROFIBUS DP communication

CU310-2 PN

6SL3040-1LA01-0AA0

PROFINET communication

The correct controller must match the installed PLC network and machine project.

CU310-2 DP vs CU320-2 DP

CU310-2 DP

Dedicated controller for one distributed drive

One DRIVE-CLiQ connection

Local encoder and I/O interfaces

CU320-2 DP

Central controller for larger multi-axis drive groups

Multiple DRIVE-CLiQ connections

Designed to coordinate several Line and Motor Modules

The CU310-2 DP should not be promoted as a central controller for a complex multi-axis cabinet.

CompactFlash Card Requirement

The 6SL3040-1LA00-0AA0 is supplied without a CompactFlash Card.

The card may contain:

• Drive firmware
• Motor parameters
• PROFIBUS settings
• Encoder configuration
• Technology functions
• Safety licenses
• Machine-specific project data

Before commissioning, confirm:

• CompactFlash Card order number
• Firmware version
• Drive project
• Required licenses
• Motor data
• Encoder parameters
• Communication settings

A controller without the correct card and project may not operate the drive correctly.

System Requirements

A complete operating system normally requires:

• CU310-2 DP Control Unit
• CompactFlash Card
• Compatible power stage
• Motor
• Motor feedback
• 24 V DC electronics supply
• PROFIBUS network
• DRIVE-CLiQ connection where required
• Approved commissioning parameters

The Control Unit does not directly provide motor power.

Replacement Identification

Correct Model Number

6SL3040-1LA00-0AA0

Correct Product Type

CU310-2 DP Control Unit

Controller Generation

CU310-2

Communication

PROFIBUS DP

Encoder Interface

TTL / HTL or SSI

CompactFlash Card

Not Included

Before replacement, confirm:

• Complete order number
• 1LA00 prefix
• 0AA0 suffix
• PROFIBUS configuration
• CompactFlash Card
• Firmware version
• Encoder type
• DRIVE-CLiQ topology
• Power-stage compatibility
• Existing machine parameters

Do not select the replacement only according to the CU310-2 name or physical appearance.

Installation Guidelines

Disconnect the complete drive-system supply.

Wait for the DC link to discharge fully.

Verify the absence of hazardous voltage.

Back up the drive project.

Record the PROFIBUS address.

Record the encoder configuration.

Record the DRIVE-CLiQ topology.

Confirm the CompactFlash Card.

Verify the exact order number.

Install the controller securely.

Reconnect control and communication cables.

Restore the approved project.

Test the axis at reduced speed.

Verify encoder direction and scaling.

Check PROFIBUS communication.

Validate all machine safety functions.

Installation and commissioning should be completed by qualified drive-system personnel.

FAQ

Q1: What is 6SL3040-1LA00-0AA0?

A1: It is a SINAMICS S120 CU310-2 DP Control Unit for an individual PROFIBUS-connected drive.

Q2: Is it the original CU310 DP?

A2: No. It is the later CU310-2 DP generation. The original CU310 DP uses model 6SL3040-0LA00-0AA1.

Q3: What fieldbus does it use?

A3: It uses PROFIBUS DP.

Q4: Does it include an encoder interface?

A4: Yes. It supports compatible TTL, HTL or SSI encoder feedback.

Q5: Does it directly supply motor power?

A5: No. A compatible power stage supplies the motor.

Q6: How many digital inputs are available?

A6: Official technical data lists eleven digital inputs.

Q7: Does it have configurable digital I/O?

A7: Yes. It provides eight bidirectional digital I/O terminals.

Q8: Is a CompactFlash Card included?

A8: No. It is officially supplied without a CompactFlash Card.

Q9: Can it replace a CU310-2 PN?

A9: Not directly. The DP version uses PROFIBUS, while the PN version uses PROFINET.

Q10: Is this model still active?

A10: Yes. It is currently listed as an active product.