Model PD1 – Digital Autotune PID Controllers

Overview
PID (Proportional–Integral–Derivative) controllers are fundamental instruments used in industrial automation to maintain desired process conditions such as Temperature, pressure, or flow rate. By continuously comparing a setpoint to the process variable and applying corrective actions, PID controllers ensure optimal system performance with minimal manual intervention.

Working Principle
A PID controller calculates the deviation (error) between a desired setpoint and a measured process variable. It applies corrective output based on three components:

• Proportional (P): Immediate response to the current error

• Integral (I): Correction based on accumulated past errors

• Derivative (D): Predictive correction based on the rate of error change

This tri-action logic enables the controller to stabilize the process efficiently and accurately. The autotune function automatically adjusts PID parameters to suit the system’s dynamics, minimizing overshoot and improving stability.

Key Features

• Control Outputs:

  • Servomotor

  • On/Off Relay

  • 4 to 20 mA Analog Output

• Profile Control:

  • Programmable 16-segment Ramp-Soak profile for complex Temperature/time operations

• Alarm Outputs:

  • Up to 2 alarms

  • 230 VAC, 3 Amp relay contacts

• Fuzzy Logic & Autotuning:

  • Advanced fuzzy logic-based PID algorithm for adaptive and self-correcting performance

  • Automatic tuning of PID parameters ensures easy setup and optimum response

• Universal Input Compatibility:

  • Thermocouple (e.g., K, J, T, etc.)

  • RTD (PT-100)

  • Analog (4 to 20 mA)

• Available Sizes:

  • 48 × 48 mm

  • 48 × 96 mm

  • 96 × 48 mm

  • 96 × 96 mm

• Additional Features:

  • Remote Set Point (RSP) functionality

  • Retransmission Output for signal duplication

  • Serial Communication: RS-485 / RS-232 for SCADA or PLC integration

Applications

• Temperature control in furnaces, ovens, and heating systems

• Flow and pressure regulation in industrial processes

• Automation in plastic, packaging, and chemical industries

• Systems requiring ramp-soak programming and adaptive tuning