Sinamics Link Communication Example & A50005 Alarm Resolution

Regarding your request for a sample configuration file for Sinamics Link communication between multiple drives, and addressing the A50005 alarm on the master drive, here's guidance and resources.

Understanding the A50005 Alarm

The A50005 alarm ("Communication error with a converter in the Sinamics Link network") typically indicates a problem with the communication between the master drive and one or more slave drives in the Sinamics Link network. Since your P2P field converter setup is working, the basic link functionality is confirmed. The issue likely lies in the Profibus configuration (IF2) and interaction with Sinamics Link (IF1).

Configuration Guidance & Resources

Unfortunately, providing a single "example file" is difficult due to project-specific variations. However, these resources will greatly assist you:

• SiePortal Entry (Highly Recommended): Sinamics Link Communication Error A50005 - This SiePortal entry details common causes and resolutions for this specific alarm.
• Sinamics Link Manual: Refer to the Sinamics Link documentation (available on SiePortal) for detailed configuration instructions, focusing on the interaction between Profibus and Sinamics Link.
• Application Example (Siemens): Sinamics S120 Drive Communication via PROFIBUS and Sinamics Link - Example Project. This example shows a setup using both interfaces.

Key Configuration Checks:

• Profibus Address Assignment: Ensure unique Profibus addresses are assigned to each drive connected via IF2.
• Sinamics Link Addressing: Verify the correct Sinamics Link addresses are configured on each drive.
• Parameter P0700 (IF2 Communication Selection): Confirm this parameter is set correctly for Profibus communication on IF2.
• Parameter P0701 (IF2 Address): Verify correct Profibus address for each drive.
• Parameter Group P2000 (Sinamics Link): Carefully review the parameters within this group for correct network configuration.

Simulink experience, while helpful, may not directly translate to the specific parameterization required within the Sinamics drives. Focus on the configuration parameters within the drive firmware.

If you continue to experience issues, please provide the following information for further assistance:

• Drive Firmware Versions
• Detailed Network Topology
• Relevant Parameter Settings (P0700, P0701, P2000 groups)

V90 Servo Motor Position Reset Issue - Mode 7 Homing

Dear Customer,

The behavior you're observing with your V90 servo motors in Mode 7 homing is a known issue related to absolute encoder handling and power-cycle behavior. Here's a breakdown and solution:

Problem Analysis

The V90, by default, doesn't persistently store the absolute encoder position across power cycles without specific configuration. The StatusSensor[1].AbsEncoderOffset is being used as a temporary storage, but it is not designed for permanent retention. The "Axis.Homed" flag resetting is expected, as part of the homing process relies on a fresh start.

Solution

You've correctly identified saving RAM to ROM in V Assistant, however, there is a crucial additional setting required:

• Enable "Position is retained after power loss" in the V Assistant: Navigate to the Technology Object -> Axis -> Positioning -> General. Ensure the "Position is retained after power loss" checkbox is checked.

Important Considerations

• Absolute Encoder Initialization: Verify the encoder is correctly initialized and the correct number of pulses per revolution is configured in V Assistant.
• Homing Parameter Check: Double-check your homing parameters in Mode 7, ensuring they are suitable for your application.

If the problem persists after enabling "Position is retained after power loss", please provide the complete V Assistant configuration (as a backup file) and the PLC code snippet related to position reading and homing for further analysis.

For more details, please refer to SiePortal documentation: Siemens Documentation

Sincerely,
Siemens Self Support

SINAMICS DCM (6RA80) Drive - FAQ Document

Hello!

A helpful FAQ document is available to assist in understanding and resolving common faults with SINAMICS DCM (6RA80) drives. It details various diagnostic methods.

You can find the FAQ here. Focus on the section relevant to your specific issue to expedite troubleshooting.

This preliminary investigation will be valuable when discussing your problem with Technical Support.

Cheers,
Navnag