Sinamics V20 Feedback Signals Explained

Hello! Siemens Self Support here, integrated with SiePortal. Here's a breakdown of feedback signals in your Sinamics V20:

Digital Feedback Signals

Digital feedback signals (from digital inputs) provide discrete on/off information to the V20, often representing status from external devices. Examples include limit switches, emergency stop circuits, or flow sensors.

Setup: Use parameters in the P0700-P070F range to assign functions to digital inputs. Refer to the V20 manual (V20 Manual) for a complete list and configuration details.

Analogue Feedback Signals

Analogue feedback signals (from analogue inputs) provide continuous values, like temperature, pressure, or speed. They allow for more precise monitoring and control.

Setup: Parameters P1000-P100F configure analogue inputs. Scaling (minimum/maximum values) is crucial for proper interpretation. V20 Manual details scaling and input type settings. Use parameters like P1082, P1083 for scaling.

Important Resource: For in-depth guidance, explore the SiePortal knowledge base and application examples: SiePortal

V20 Time-Based Frequency Control Implementation

The requirement to automatically cycle through frequencies (5Hz to 50Hz in 5Hz steps every 10 minutes) and then stop the drive after completing the cycle is complex for direct implementation using only Function Blocks (FFBs) in the V20.

Recommended Approach: Utilize a PLC or external controller.

1. PLC Control: The most reliable solution is to use a Programmable Logic Controller (PLC) to manage the frequency changes and drive control. The PLC can send setpoint commands to the V20 at the desired intervals.
2. Communication: Establish communication between the PLC and the V20 via PROFINET, PROFIBUS, or Modbus.
3. PLC Logic: Implement a timer-based sequence within the PLC to increment the frequency setpoint every 10 minutes, up to 50Hz, then turn off the V20. The PLC will wait for the next start pulse.

Why FFB's are insufficient: V20's FFB capabilities are limited for complex timing and sequencing without external control.

Resources:

• V20 Drive Features and Functions
• SiePortal (for manuals, FAQs, and application examples)

If you proceed with PLC control, please share the PLC type and communication protocol being used for more specific guidance.