LUST LTi Drives CM-CAN1 Communication Module

The LUST LTi Drives CM-CAN1 is a communication module designed for integration into compatible LTI drive systems. It provides a CAN interface that allows drive controllers to exchange data with a machine controller or with other devices on the network. The module operates from a supply in the range of 19 to 29 V. It is intended for industrial environments where reliable, real time communication between drives and higher level control is required.

Module Identification

The CM-CAN1 designation identifies the module as a CAN communication option for LTI drive platforms. The CM prefix indicates a communication module, and the CAN1 field defines the protocol and interface type. The supply range of 19 to 29 V is compatible with standard industrial control voltages. The module is mounted in the designated slot or housing according to the system design.

CAN Protocol Fundamentals

CAN is a multi master serial bus that uses differential signalling for high noise immunity. Devices on the bus transmit messages with identifiers that define priority and content. Because the protocol is message based rather than address based, several devices can share the same bus. Error detection and automatic retransmission make CAN reliable in electrically noisy industrial environments. The data rate can be selected according to bus length and the number of connected nodes.

Function Within the Drive System

The module allows the drive to receive commands and setpoints from a controller and to return status information and actual values. Cyclic data exchange supports real time control, while acyclic communication supports parameterization and diagnostics. The drive continues to handle motor control locally, so communication delays do not affect the inner current loop. This separation allows high performance motion control while maintaining network connectivity.

Data Exchange and Control

Control words can enable the drive, reset faults, and select operating modes. Status words report the drive state, active faults, and warnings. Setpoints such as speed or torque references are transmitted from the controller. Actual values such as position, speed, and current are returned. Scaling and mapping of these signals are configured during commissioning so that the controller and drive interpret the data consistently.

Electrical Characteristics

The module operates from a supply between 19 and 29 V, which allows it to be powered from the same control supply used by other components in the cabinet. The CAN interface uses differential lines with termination resistors at each end of the bus. Correct termination is essential for reliable communication. The module includes protection against supply reversal and transient overvoltage to safeguard the internal circuitry.

Configuration and Commissioning

Commissioning requires assigning a node identifier to the drive and setting the bus data rate to match the rest of the network. The mapping of process data must be defined so that the controller and drive agree on the meaning and position of each signal. Parameter settings for communication, timeout behaviour, and fault response are configured through the engineering software. After configuration, communication should be verified before the machine is run under load.

Diagnostics

The module supports diagnostic reporting over the network. Communication errors such as bus off conditions, missing messages, and timeouts can be detected and reported. The drive can be configured to react to communication loss by stopping the axis or by holding the last command, depending on the safety requirements of the machine. Status indicators on the module assist with local troubleshooting.

Installation Guidelines

Install the module in the designated slot and secure it according to the system manual. Use shielded twisted pair cable for the CAN bus and connect the shield to ground at one point to avoid ground loops. Keep bus cable length within the limit for the selected data rate. Ensure that termination resistors are fitted at both ends of the bus. Route the bus cable away from power cables to reduce interference.

Applications

The module is used in packaging machinery, printing equipment, textile machines, handling systems, and assembly lines. It is suitable for systems where several drives must be coordinated by a central controller. CAN communication is also common in mobile machinery and in compact machines where a simple, robust bus is preferred over more complex networks.

Maintenance and Service

Communication modules require little maintenance. Periodically check connectors for tightness and corrosion. Verify that termination resistors remain in place. Keep a record of node identifiers, data rates, and parameter settings so that a replacement module can be configured quickly. If communication faults appear, check cable routing and shielding before replacing hardware.

Selection Considerations

Confirm that the drive platform supports the CM-CAN1 module. Verify that the required data rate and bus length are compatible. Check that the controller supports CAN and that the process data mapping can be configured as needed. Ensure that the control supply is within the 19 to 29 V range.

Conclusion

The LUST LTi Drives CM-CAN1 is a practical CAN communication module for industrial drive systems. It provides reliable data exchange, supports real time control, and simplifies integration of drives into networked machines. With correct configuration and installation, it contributes to stable and connected automation systems.