Mitsubishi Tension Controller Le 30 Cta Manual ^hot^ May 2026

Article: Mitsubishi Tension Controller LE-30 CTA — Manual Overview and Guide

Chapter 6: PID Adjustment

Unlike modern auto-tuning controllers, the LE-30CTA requires manual PID tuning. The manual provides a starting rule of thumb:

  • P (Gain): Start at 2.0. Increase until oscillation, then reduce by half.
  • I (Integral): Start at 0.5 sec. Increase if steady-state error persists.
  • D (Derivative): Rarely used for tension; start at 0.

A dedicated table in the manual matches PID values to material type (e.g., thin film: low P/high I; thick paper: high P/low I). mitsubishi tension controller le 30 cta Manual

2. Terminal Block Wiring Guide

Note: Always disconnect power before wiring. Article: Mitsubishi Tension Controller LE-30 CTA — Manual

The rear panel contains the main terminal block. While specific pin layouts can vary by revision generation, the standard logic is as follows: P (Gain): Start at 2

| Terminal Marking | Function | Description | | :--- | :--- | :--- | | L, N | Power Input | AC Power supply (Check label for 110V or 220V rating). | | G/⏚ | Ground | Earth ground for safety and noise reduction. | | E+, E- | Sensor Input | Connection to the Tension Load Cell/Meter. Polarity matters. | | M+, M- | Meter Output | Outputs voltage proportional to actual tension (for an external voltmeter). | | O+, O- | Control Output | Output to the Brake/Clutch driver or VFD analog input. | | RUN | Run Contact | External contact to start/stop the control loop. | | ALM | Alarm Contact | Relay contact closes if the unit detects a fault. |

Key features and purpose

  • Closed-loop tension control for roll-to-roll processes.
  • Supports setpoint control, auto-tuning of control parameters, and multiple operating modes (e.g., tension control, speed control, torque limit).
  • Digital display and keypad for local configuration and monitoring.
  • Inputs for tension feedback (load cell/ dancer), speed or encoder signals, and analog/digital setpoints.
  • Outputs to drive and communicate with motor drives or controllers.

Critical Parameters

  • P (Proportional Band):
    • Lower Value: Stronger reaction, risk of oscillation.
    • Higher Value: Weaker reaction, more stable but slower.
    • Advice: If tension is wavering, increase P. If it is too lazy, decrease P.
  • I (Integral Time):
    • Eliminates the gap between actual tension and target tension over time.
    • Advice: If tension settles but at a slightly wrong level, decrease I.
  • D (Derivative Time):
    • Reacts to rapid changes. Prevents overshoot.
    • Advice: If tension overshoots wildly when starting, increase D.
  • Filter (FIL):
    • Smooths the input signal. Increase if the display is jittery due to mechanical vibration.

4. Quick Start Guide: How to Operate

Part 2: Anatomy of the LE-30CTA – Understanding the Manual’s Terminology

Before diving into the manual’s procedures, you must understand the hardware. The Mitsubishi Tension Controller LE-30CTA Manual typically refers to these core components:

Introduction

The Mitsubishi LE-30 CTA tension controller is a compact, industrial controller used to maintain consistent web tension in processes such as printing, coating, laminating, and slitting. This article summarizes the device’s purpose, key functions, typical installation and setup steps from the manual, common parameters, troubleshooting tips, and best-practice maintenance.