PPI Zenex User Manual

zenex
User Manual
Universal Self-Tune PID
Temperature Controller with
Programmable Timer

PPI Zenex Specifications

General

Brand	PPI
Model	Zenex
Category	Temperature Controller
Language	English

Summary

Front Panel Layout

Readouts Description

Describes the Upper and Lower Readout displays, their function, and content.

Indicator Status

Details the status and meaning of front panel LEDs like S, T, OP1, OP2, OP3.

Front Panel Keys and Functions

Basic Operations and Power-Up

Controller Power-Up Sequence

Describes the initial display and sequence upon controller power-up.

Main Display Mode Functionality

Explains the main display mode showing PV and SP values.

Adjusting Control Setpoint (SP)

Steps for adjusting the Control Setpoint (SP) value via front panel keys.

Auto-Tuning and Optimization Indication

Describes the indication and user advice during tuning/optimization.

Soak Timer Mode Indicators

Explains the indicators S and T related to the Soak Timer status.

Process Value (PV) Error Indications

Describes indications for PV errors like over-range, under-range, or sensor breaks.

Control/Alarm Status During PV Errors

Operator Page and Parameter Access

Accessing and Operating Set-Up Mode

Navigating and Modifying Parameters

Step-by-step guide for viewing and modifying parameter values in Set-up Mode.

Master Locking Feature

I/O Configuration Parameters

Input Type Selection

Details input type selection for sensors like Thermocouples and RTDs.

Temperature Display Units

Options for selecting temperature units (°C or °F).

Temperature Range Setting

Setting the maximum temperature range for proper Self-Tune/Optimize operation.

Control Output Type Configuration

Details available options for the control output type.

Control Mode Options

Explains On-Off and PID control modes and their characteristics.

Control Logic Selection

Describes Direct and Reverse control logic for heating/cooling.

Hysteresis Band Setting

Setting the differential band for ON/OFF control to prevent frequent switching.

Setpoint Low Limit Configuration

Setpoint High Limit Configuration

OP2 Function Parameters

Output-2 Function Selection

Selects the function for the Output-2 relay (None, Alarm, Auxiliary Control, Blower).

OP2 Alarm-1 Configuration

Configures Alarm-1 parameters for OP2, including Type, Setpoint, Deviation, and Window Band.

OP2 Auxiliary Control Settings

OP2 Blower/Compressor Control Settings

OP3 Function Parameters

OP3 Alarm-2 Configuration

Configures Alarm-2 parameters for OP3, including Type, Setpoint, Deviation, and Window Band.

OP3 Auxiliary Control Settings

Configures settings for Auxiliary Control function on OP3, including Offset Value and Hysteresis.

PID Control Parameters

% Output Power Display

Displays the computed '% Output Power' by the PID algorithm.

PID Cycle Time Setting

Sets the time interval for ON/OFF switching in time-proportionating PID control.

PID Proportional Band Setting

Defines the process value deviation range for output power variation in PID control.

PID Integral Time Setting

Controls automatic removal of steady-state offset error in PID control.

PID Derivative Time Setting

Soak Timer Parameters

Soak Timer Enable/Disable

Enables or disables the Soak Timer function and Start/Abort commands.

Soak Timer Time Units

Selects the time units (Min:Sec, Hrs:Min, Hours) for the Soak Timer.

Soak Timer Duration Setting

Sets the preset time value for the Soak Timer in selected units.

Soak Timer Start Band

Defines the process band around SP for the timer to start counting down.

Soak Timer Holdback Strategy

Configures how the timer pauses based on PV relative to the Hold Band.

Output Control at Timer End

Determines if the control output (OP1) is forced off upon timer completion.

Power-Fail Recovery for Soak Timer

Soak Timer Operation Diagram

Soak Timer Basic Operation Modes

Soak Timer Hold Band Operation

End-of-Soak Event Configuration

Supervisory Parameters

Initiate Tune/Optimize Command

Command to start the Tune/Optimize operation for PID control.

Abort Tune/Optimize Command

Command to terminate an ongoing Tune/Optimize operation.

Overshoot Inhibit Feature

Enables control of PV rate of change to minimize overshoot.

Overshoot Inhibit Factor Adjustment

Adjusts the effectiveness of the Overshoot Inhibit feature.

Self-Tune on Setpoint Change

Enables re-tuning the controller when a substantial SP change occurs.

PV Offset Correction

Adds offset to PV for removing thermal gradient or sensor errors.

Digital Filter for PV

Averages PV to remove rapid changes, improving stability.

Operator Page Setpoint Editing Permission

Operator Page Soak Abort Command

Operator Page Soak Time Adjustment

Utility Module Options

Slave ID Configuration

Baud Rate Configuration

Communication Write Enable Setting

Hardware Assembly and Configurations

Electronic Assembly Overview

Describes the basic electronic assembly comprising CPU, Power-supply, and Display PCBs.

Removing Electronic Assembly

Placing Electronic Assembly Back

Mounting Plug-in Modules

Output Module Jumper Settings

Details jumper settings for configuring Output-2 and Output-3 modules (Relay/SSR).

DC Linear Module Configuration

Module Mounting and Un-mounting Procedure

Mechanical Installation Precautions

Controller Outer Dimensions

Shows the external dimensions of the controller unit.

Panel Cutout and Spacing Requirements

Details the required panel cutout size and minimum spacing for mounting.

Panel Mounting Procedure

Electrical Connections Guide

2 Output Version Wiring Diagram

Provides the electrical connection diagram for the 2 Output version.

3 Output Version Wiring Diagram

Provides the electrical connection diagram for the 3 Output version.

DC Linear Version Wiring Diagram

Provides the electrical connection diagram for the DC Linear version.

Temperature Sensor Input Connections

Details how to connect Thermocouple and RTD Pt100 sensors.

Output-1 Control Output Connections

Explains connections for Relay/SSR drive and DC Linear mA/V outputs.

Power Supply Connections

Instructions for connecting the AC power supply to the controller.

Serial Communication Port Connections

Details connections for the serial communication port (RS485).

Front Panel Layout (96x96)

Readouts Description (96x96)

Describes the Upper and Lower Readout displays for the 96x96 model.

Indicator Status (96x96)

Details the status and meaning of front panel LEDs for the 96x96 model.

Front Panel Keys and Functions (96x96)

Hardware Assembly and Configurations (96x96)

Electronic Assembly Overview (96x96)

Describes the electronic assembly for the 96x96 controller.

Output Module Jumper Settings (96x96)

Electrical Connections (96x96)

2 Output Version Wiring Diagram (96x96)

Provides the electrical connection diagram for the 2 Output version (96x96).

3 Output Version Wiring Diagram (96x96)

Provides the electrical connection diagram for the 3 Output version (96x96).

DC Linear Version Wiring Diagram (96x96)

Provides the electrical connection diagram for the DC Linear version (96x96).

Temperature Sensor Input Connections (96x96)

Details how to connect Thermocouple and RTD Pt100 sensors for the 96x96 model.

Output-1 Control Output Connections (96x96)

Explains connections for Relay/SSR and DC Linear outputs for the 96x96 model.

Power Supply Connections (96x96)

Instructions for connecting the AC power supply to the 96x96 controller.

Serial Communication Port Connections (96x96)

Details connections for the serial communication port of the 96x96 controller.