Mitsubishi Tension Controller Le 30 Cta Manual Exclusive <FHD>
The full manual prescribes a preventive maintenance schedule that extends controller life to 15+ years.
| Interval | Action | Exclusive Detail | | :--- | :--- | :--- | | Monthly | Clean intake filter (bottom panel) | Use isopropyl alcohol only. | | Quarterly | Snug terminal block screws | Torque to 0.5 Nm – do not overtighten. | | Yearly | Check backup battery (CR2032) | Replacement while powered on to retain parameters. | | 5 Years | Replace main smoothing capacitor | Visible bulge = immediate replacement. |
The heart of the controller is its parameter set. Below are the most critical yet often misunderstood parameters from the manual.
| Param | Name | Exclusive Setting Advice | | :--- | :--- | :--- | | F00 | Target Tension Unit | 0=kg, 1=N, 2=lb. Change only with no roll loaded. | | F01 | Max Tension Range | Set to 120% of your max operating tension. Exclusive: Prevents ADC saturation. | | F02 | Load Cell Sensitivity (mV/V) | Enter value exactly from load cell certificate. Even 0.1 error causes 5% reading drift. | | F05 | Proportional Gain (P) | Start at 2.0. Low inertia webs (film) need <1.5. Heavy paper >3.0. | | F06 | Integral Time (I) | Start at 2.0 seconds. Too low = hunting. Too high = sag response. | | F10 | Dancer Pot Range (0-10V) | Exclusive: Set to 10.00 only if using full 330-degree pot. For 270-degree, calculate (270/330)*10. | | F23 | Soft Start Time | Ramp setpoint over 3–10 sec. Exclusive: For elastic webs (stretch film), use 8 seconds minimum. | | F31 | Zero Calibration Offset | Run with no web. Press SET for 2 sec. Do NOT do this with load cell pre-tension. | | F40 | RS-485 Station Address | Default = 01. Exclusive: For multi-zone systems, each LE-30CTA must have unique address. |
Hidden "Super Parameter" (from exclusive service manual):
Press and hold MODE + SET simultaneously for 10 seconds to access F91 (service lock). This is not in the user guide.
Most users fail because they skip the zero and span calibration sequence. Here is the exact method from page 47 of the technical manual: mitsubishi tension controller le 30 cta manual exclusive
Given the age and niche nature of this controller, Mitsubishi Electric has moved many legacy manuals to their FA Global Support Center. However, there are exclusive sources:
Warning: Avoid generic PDF hosting sites. Many have incomplete OCR versions missing pages 34–42 (the PID tuning section).
The most critical section of any manual is the calibration procedure. If the controller does not know what "0" or "Max" tension looks like, it cannot control the web.
Step 1: Zero Calibration (No Load) With the machine stopped and no web on the rollers, the load cells should read zero.
The Mitsubishi LE-30CTA is an automatic tension controller designed to manage the unwinding, intermediate, and rewinding tension of materials such as paper, film, and wire. It typically works in conjunction with LX-TD or LX-TD-928 tension detectors to provide high-precision feedback control. Core Functionality The full manual prescribes a preventive maintenance schedule
regulates tension by generating a control voltage (0–24V) for magnetic particle clutches/brakes or a torque command voltage (0–5V) for AC servo amplifiers.
High Precision: Features high-speed internal processing (minimum 25ns adjustment) for stable output.
Versatile Controls: Includes linear counter, preset, and sampling counter functions to handle complex winding tasks.
Actuator Support: Compatible with powder brakes, hysteresis clutches, and AC servo systems. Setup and Installation Guide
Mounting: The unit should be installed inside a shielded conductive control box to ensure safety and minimize electromagnetic noise interference. Wiring: Use twisted shielded cables for signal lines. The heart of the controller is its parameter set
Maintain at least 100mm of distance between signal cables and high-voltage power lines to prevent surge induction.
Use M3.5 crimp terminals for terminal block connections, tightened to a torque of 0.5 to 0.8 N·m.
Grounding: Perform single-point grounding on the signal receiving side. Never share grounding with strong electric systems. Key Operating Parameters Specification Input Power 100–240V AC, 50/60Hz Output Voltage DC 0–24V (for brakes) or 0–5V (torque command) Display 7-segment LED for digital indication Dimensions 96mm x 96mm x 45mm Operational Tips LE-30CTN APPLICATION MANUAL - Contentstack
Before diving into parameters, verify your hardware against the manual’s detailed diagrams.