Welcome

If you are new to U90 Programming, try out the M90 Tutorial, located on U90 Ladder's Help menu.

U90 Ladder 6.6.0

This version supports new models:
- JZ20-T10
6 Digital Inputs, 4 Transistor Outputs
- JZ20-T18
6 Digital, 2 Analog/Digital, 2 Analog Inputs, 8 Transistor Outputs

These models both support Ethernet Add-on module for Jazz 2, enabling both MODBUS/TCP and PC-PLC communications.

Jazz20: 1 mSec Interrupt
Jazz20 models now support an Interrupt of 1 mSec, via SB 96.

U90 Ladder 6.5.0

Block PC Access (Jazz20 ONLY)

Enables you to lock the communication channel and require a password to open it.

U90 Ladder 6.4.0

Comprises OS 2.20 B04 OS for Jazz 2 (JZ20)

Supports new Jazz 2 models
Supports Ethernet Add-on module for Jazz 2, enabling both MODBUS/TCP and PC-PLC communications.

U90 Ladder 6.3.0, OS 2.20 B00

Supports new Jazz models

JZ20-R10, JZ20-R16, and JZ20-R31 are supported in Hardware Configuration.

These models:

Are 30x faster than JZ10 models
Comprise integral USB programming ports.

U90 Ladder 6.2.0

Hardware Configuration; now supported by U90 Ladder:

XL series I/O modules, offering more I/Os in less space. EX modules offer a built-in adapter, replacing the need for an EX-A1 adapter. Supported modules:

EX-D16A3-RO8
EX-D16A3-TO16
IO-D16A3-RO16
IO-D16A3-TO16

New Jazz Models:

JZ10-11-UN20
JZ10-11-UA24

Cold Start SI

To cause PLC restart:

With initialization, set SI 140 to -32500
Without initialization, set SI 140 to-32000.

Slovakian support

To change the U90 Ladder interface language, select View>Language and click on the desired language.

U90 Ladder 6.1.0

UniDownloader

Jazz: Auto Tune PID

U90 Ladder 5.2.6

JZ10-11-PT15
3 Digital, 3 Analog, 3 RTD Inputs; 5 Relay,1 pnp/npn Outputs

U90 Ladder 5.2.4

You can now download programs to one or more controllers on an RS485 network.

U90 Ladder 5.2.3

Hardware

M91-2-T38
22 PNP/NPN Digital Inputs, 2 HSC, 16 PNP Transistor Outputs, 2 HSO
IO Expansion Module: IO-PT400, IO-PT4K
Two new modules offer 4 PT inputs (alpha): I/O-PT400 supports PT100 & NI100; I/O-PT4K supports PT1000 & NI1000

Feature M90 PID Internal Auto-tune
M91 controllers may now be easily tuned via SBs . Each PID loop is linked to two SBs, one to activate auto-tune, and one that signals when the process is complete. Check the new sample application: Help> Sample U90 Projects>PID M91 Auto-tune.U90.

Jazz OS (V1.00, B08)
Contains several internal improvements

Utilities

To see what updates have been released for Unitronics software utilities, such as DataXport, Remote Access and UniOPC Server, check http://www.unitronics.com/download.htm .

'Long' Integer functions

Welcome to U90 Ladder

U90 Ladder is the software tool you use to create applications for M90, M91, and Jazz PLC s. After you plan the control task, use U90 Ladder to write, debug, and download the PLC control and HMI applications into the controller.

Program Editors

The program editors are where you create and edit both the PLC and HMI aspects of your project application.

The Ladder Editor is a program editor. The Display and Variable Editors are HMI editors. Each editor is operated through a different window. You switch between editors via the Standard Toolbar buttons or in the Project Navigator.

When you are working with U90 Ladder, the optimum PC display resolution is 1024 x 768.

Project Navigation Tree

The Project Navigation Tree allows you to navigate easily between components of your program, data types and tools of the U90 Ladder.

Browse Sequences

This U90 Help version contains selected browse sequences. These sequences are arranged by topic to help you make the most out of U90's on-line help. The subject of each sequence appears in the Browse pull-down menu as shown below. The subjects in a browse sequence are arranged from general to most specific.

Printing Documentation

The topics in this help file are contained in the U90 Ladder Software Manual. This manual can be viewed or printed from the software CD. Note that the help file is always the most current version.

Interface Language

U90 Ladder can be run in a variety of languages, by selecting Language from the View menu, and then clicking on the desired language.

Use the Help browser to learn how to use U90 Ladder effectively. Topics in a browse sequence are classed according to subject. This enables you to see related topics without conducting a search.