ABB PFVO142
ABB PFVO142 - Image 2

ABB PFVO142

Product Brief:​ The PFVO142 is a dedicated tension control / PID regulator module​ in ABB’s tension system family. It accepts the actual tension feedback (from PFSA140 / PFTL301E — 0–10 V or 4–20 mA), compares it with the operator-set tension setpoint, computes the error, and produces a control output (typically ±10 V or 0–10 V / 4–20 mA reference) to the section’s drive (via analog input of VFD / DC drive) or to a dancer-position compensator. It includes features such as gain scheduling (different gains for low vs. high speed / tension), inertia compensation, diameter calculation (for unwind/rewind taper tension), and dancer reset logic.

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Category: SKU: ABB PFVO142

Description

ABB PFVO142

  • Technical Specifications (typical):
    • Inputs:
      • Tension Feedback: 0–10 V / 4–20 mA (from tension amp)
      • Tension Setpoint: 0–10 V (internal pot or external reference from PLC/HMI)
      • Line Speed / Diameter feedback (optional — from encoder or diameter module PFVI/PFVC)
    • Output: ±10 V (bipolar for reversible drives) or 0–10 V / 4–20 mA (unidirectional) — selectable
    • Control Algorithm: PI / PID with anti-windup; gain scheduling vs. diameter or speed
    • Taper Tension: Programmable linear taper (e.g., 100 % @ full core → 50 % @ empty reel)
    • Inertia / Acceleration Comp: Feed-forward term proportional to dω/dt (requires speed signal)
    • Operating Mode: Constant Tension, Constant Elongation (with strain gauge / extensometer), Dancer-Assist
    • Power: 24 V DC or 100–240 V AC (model dep.)
    • Indicators: Power, Reg Enabled, Saturation, Error LEDs
    • Mounting: DIN rail or panel in tension control cubicle
    • Dimensions: ≈45 mm (W) × 110 mm (H) × 130 mm (D)
  • Functional Features:
    • Bumpless transfer between Manual (open-loop) and Auto (closed-loop) modes
    • Diameter computation for winding rolls (using line speed + drive rpm or via ultrasonic/encoder diameter sensor)
    • Jog / Thread mode — open-loop fixed reference for threading web
    • Watchdog — if tension feedback lost (sensor break) → output clamps to safe value or faults per configuration
    • Compatible with ABB drive analog input (ACS800/ACS880 AI as speed ref) or with dancer-position inner loop
  • Application Scenarios:
    • Unwind stand — maintain constant web tension as roll diameter decreases (taper tension)
    • Rewind stand — maintain constant tension as roll builds up
    • Intermediate tension zone (S-wrap / nip) — constant tension between sections of a multi-section line
    • Retrofit of older mechanical tension regulator — PFVO142 + PFRL + PFTL301E replaces analog PI card
  • Material & Structure / Working Principle / Installation / Precautions:
    • Mount near drive; connect tension feedback from PFTL301E/PFSA140; connect setpoint from HMI or front pot; connect output to drive AI (speed reference)
    • During commissioning: set P & I gains starting low → increase until stable w/o oscillation; enable taper & diameter calc if winding
    • For unwind/rewind: verify diameter source — if using calculated diameter, check initial core diameter & full roll diameter entries; perform diameter re-zero at roll change
    • Precautions:
      • Incorrect P/I tuning causes tension oscillation (too high gain) or sluggish response (too low) — tune with web running at low speed first
      • Ensure output polarity matches drive expectation (bipolar ±10 V for reversible unwind brake/regenerative drive; 0–10 V for unwind torque ref on some DC drives)
      • In thread/jog mode ensure output is limited to safe low value — prevents sudden acceleration during web threading
      • Sensor break (open circuit on tension input) should cause defined safe action — configure watchdog to fault or go to last value per machine risk assessment

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