Mitsubishi Tension Controller Le 30 Cta Manual -
Given that this is a discontinued product, here are the legitimate sources (as of 2025):
Caution: Avoid fake "pay-per-download" sites that charge $50 for public-domain manuals. The LE-30CTA manual is copyrighted but freely distributed by Mitsubishi for existing users.
The manual stresses separation of power and signal lines. You must route the sensor cables (shielded twisted pair) away from motor leads. A common mistake documented in the manual’s troubleshooting guide is ground loops—it insists on a single-point ground for the controller. mitsubishi tension controller le 30 cta Manual
Critical Wiring Table (from manual): | Terminal | Signal | Notes | | :--- | :--- | :--- | | 1, 2 | AC Power | Fuse protection required | | 5, 6, 7 | Tension Sensor (A, B, +EXC) | 5V excitation | | 10, 11 | Analog Output | To brake/clutch | | 14, 15 | External Setpoint | 0-10VDC input |
| Symptom | Possible Cause | Solution | | :--- | :--- | :--- | | PV Display shows "----" or "OF" | Sensor broken or disconnected | Check wiring to Load Cell (E+/E-). Check for cable breaks. | | Tension does not change | Output fuse blown | Check the fuse protecting the brake/clutch circuit. | | PV is unstable/jittery | Mechanical vibration or noise | Increase the Filter parameter; check for ground loops. | | Output is 100% constantly | Tension too low to detect | Check if load cells are physically working; check Zero calibration. | | Control is slow | PID settings incorrect | Decrease P-Band or Integral time. | Given that this is a discontinued product, here
Some third-party companies (e.g., Radwell, PLC Center) offer flat-rate repair for the LE-30CTA. Typical failure: capacitor aging in the power supply. Cost: $400-$700.
After two decades of field service experience, here are unwritten truths about this controller: Caution: Avoid fake "pay-per-download" sites that charge $50
Unlike modern auto-tuning controllers, the LE-30CTA requires manual PID tuning. The manual provides a starting rule of thumb:
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).
