Omron CJ-Series manual Disturbance Overshoot Adjustment

Function blocks make loop-control programming easy. You can also create

CX-Process Tool tuning windows to help adjust loops. Controller faceplates

can be created automatically for touch panel displays.

Sequence control programs: Standardize and simplify programs using structured programming. Special I/O Unit and CPU Bus Unit settings are easy with function blocks (using ladder programming language or structured text).

Loop control programs: By combining function blocks, a wide array of control methods can be easily configured, from basic PID control used by Temperature Controllers to program, cascade, and feed-forward control. Easily display values, such as temperatures, in engineering units, allowing you to check operation.

Simply turn the DIP Switch ON/OFF to save or read the

user program including function blocks using the

Memory Card.

Simple backup function enables backup, recovery, and comparison of all PLC data including the function block programs for the Loop Control Board using the Memory Card.

Save tag settings, comments, annotations, and connection data created using the CX-Process Tool to either a Memory Card or a Loop-control CPU Unit. Note: Supported by unit version 3.0 or later.

Engineering Example: Program Control
Loop-control CPU Unit
		CX-Process Tool (Software for Personal Computer)
SP		1	Combine function blocks and connect graphically
			using the mouse.
			Analog Input	Basic PID		Analog Output
			Field Terminal			Field Terminal
			Y1	PV		X1
		Time	Y2			X2
			Y3	RSP	MV	X3
			Y4			X4
RSP
PV	TIC	MV
			Segment	2 Adjust PID and other parameters
			Program
Analog		Analog		in the tuning window.
			Y1
Input		Output
Unit		Unit
Input		Output
channel 1	channel 1

Face Plate Auto-Builder for NS

3Touch panel windows are automatically generated.

NT-series PT

Control window

Serial or Ethernet communications

Tuning window

Loop-control CPU Unit

Press the Memory Card power supply switch for 3 s.

CPU Unit

Function
block
program
Sequence
program
I/O memory	Memory
	Card
	Simple backup
	to Memory
Parameter Area	Card, including
	function block
	data.

Condition: Pin 7 is ON

Temperature Heater output input

Segment program parameter setting window

Consolidating OMRON's expertise in temperature and process control

cultivated over many years to provide you with effortless solutions

using proven algorithms.

Lineup includes low-cost models that use up to 50 function

blocks and models that allow up to 300 blocks designed for

large-scale systems and complicated operations.

Loop control: Proven functionality of Temperature Controllers and CS-series Loop Control Boards (see note 1) in a compact size.

Conventional PID gain adjustment

			Loop control: Programming with function blocks to suit the application.
			System configuration: Choose and combine functions from a broad selection of I/O Units. Process Input
											Units, Analog
											I/O Units, etc.
Read data from				Perform PID		Perform		Control output	System Configuration
						heating/cooling
Analog Input				control				from Analog
	Units					control		Output Unit
Analog Input				Basic PID		Split Conversion		Analog Output
Field Terminal								Field Terminal
		Y1		PV	SP	X1	Y1	X1	Expansion Rack	10 Units max.
		Y2			DV		Y2	X2
		Y3		RSP	MV			X3
		Y4						X4
		Y5						X5
		Y6						X6

New Algorithm Further Enhances Control Stability

Disturbance Overshoot Adjustment

This function restrains overshoot when a disturbance is generated, allowing faster stabilization.

[Example]

•Temperature drops when adding objects to a furnace

•Control disturbances when retooling

Disturbance generated

Disturbance

Overshoot

Time required to

stabilize

Longer time required

to stabilize

Using the Disturbance Overshoot Adjustment function

Faster stabilization

Y7

X7

Expansion Rack

10 Units max.

Expansion

Rack: 3

Y8

X8

Racks

max.

Segment

Set point (SP)

(See note.)

Program 2

X1

Y1

Expansion Rack

10 Units max.

Y2

Perform program

control

10 Units max.

T0

T1

T2

T3

T4

T5

T6

T97

T98

T99

T100

TIME

Note: CJ1G-CPU44P/45P

(CJ1G-CPU42P/43P: Expand up to 2 Racks)

Optimum Tuning to Suit the Application

Fine Tuning

Adjust PVs, SPs, and MVs while monitoring, and save data as CSV files from the software tuning window. Autotuning (AT) and fine-tuning functions can also be used for automatically calculating PID constants (see note 2).

Note 1: For details on CS-series Loop Control Boards, refer to the PLC-based

Process Control Catalog (Cat. No. P051).

2:Control can be fine-tuned by automatically tuning PID parameters using previous control parameters and three user-set requirements to execute

fuzzy logic. CS-Process Tool Tuning Window

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