Update your settings

Encoder Direction Detection with LOGO!

Certainly! Here's how you can determine encoder direction in your LOGO! program without external inputs. The LOGO! can directly interpret the encoder signals (A and B quadrature) to identify increasing or decreasing motion.

Key Principle: The LOGO! utilizes the phase relationship between the A and B signals. If A leads B, the motion is generally increasing; if B leads A, it's decreasing.

Example Program Logic:

1. Encoder Inputs: Connect your encoder's A and B channels to LOGO! digital inputs (e.g., I1 and I2).
2. Counter Block (CTU/CTD): Use either a CTU (Count Up) or CTD (Count Down) block.
3. Direction Logic: Implement logic to dynamically switch between CTU and CTD based on the A/B phase. This is typically done using comparison blocks.
4. Comparison Blocks: Use comparison blocks to check which encoder signal (A or B) changes state *first*. This determines direction.
5. Network Output: Use a network output (e.g., Q1) to indicate the direction detected.

Resources:

• Siemens Support - Encoder Applications with LOGO!
• YouTube Tutorial - LOGO! Encoder Counting (Example of encoder setup and counting)

Note: Exact implementation details vary based on your encoder type and desired counting behavior. Refer to the LOGO! documentation for precise block configurations.