Rockwell Automation 1746-QV, D17466.18 User Manual

Allen-Bradley

Open-loop Velocity

User

Control Module

(Cat. No. 1746-QV)

Manual

Important User Information

Because of the variety of uses for the products described in this publication, those responsible for the application and use of this control equipment must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws, regulations, codes and standards.

The illustrations, charts, sample programs and layout examples shown in this guide are intended solely for purposes of example. Since there are many variables and requirements associated with any particular installation, Allen-Bradley does not assume responsibility or liability (to include intellectual property liability) for actual use based upon the examples shown in this publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the

Application, Installation, and Maintenance of Solid-State Control

(available from your local Allen-Bradley office), describes some important differences between solid-state equipment and electromechanical devices that should be taken into consideration when applying products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or in part, without written permission of Allen-Bradley Company, Inc., is prohibited.

Throughout this manual we use notes to make you aware of safety considerations:

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death,

Attention statements help you to:

property damage or economic loss.

• identify a hazard

• avoid the hazard

• recognize the consequences

Important: Identifies information that is critical for successful

application and understanding of the product.

SLC is a trademark of Allen-Bradley Company, Inc. PKZIP and PKUNZIP are registered trademarks of PKWARE Inc.



Manual Changes (Series A/D)

Changes to this revision of the manual include these additions:

• Considerations for Selecting the "15V dc Power Supply (chapter 4)

• Other Design Considerations (chapter 4)

• Testing for Proper System Operation (chapter 5)

• Power Supply Loading Specifications (appendix A)

Publication

1746-6.18 – April 1998

Notes:

Summary of Changestoc–ii

Publication

1746-6.18 – April 1998

System Overview

Chapter Objectives

Is the 1746-QV Module?

What What Is an SLC-500 System? Why Use This System? How Does It Work? What

Are Typical Applications?

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

Quick Start

Procedure

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Setting Up the Software

Chapter Objectives Obtaining

Configuring Your SLC Processor, Off-line Modify

General Profile

the Ladder Program Electronically from

BBS or the Internet About the Rockwell Bulletin Board System (BBS) To Access BBS: To Access the Internet:

N Files in Y

Output

Image T

Conventions for Profiles

Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

our SLC Processor, Off-line

able with Profile Data

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . .

. . . . . . . . . . . . . .

1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1–1 1–1 1–1 1–2 1–2 1–2

2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2–1

3–1. . . . . . . . . . . . . . . . . . . . . . . . . . .

3–1 3–1

3–1 3–1 3–2 3–2 3–4 3–4 3–5 3–5

Setting Up the Hardware

Chapter Objectives Connect Connect Minimizing Considerations

Other

the LDT to Module Inputs Module Outputs to Output Devices

Interference from Radiated Electrical Noise

Selection Application

of the "15V dc Power Supply

Design Considerations

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

for the "15V dc Supply

of the "15V dc Power Supply

. . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

. . . . . . . . .

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

4–1. . . . . . . . . . . . . . . . . . . . . . . . . .

4–1 4–1 4–2 4–2 4–3 4–3 4–4 4–4

Table of Contentsii

Operating the Module for the First Time

Chapter Objectives Power Up the System

Check

Wiring and Grounding Get Ready to Move the Ram Move the Ram Jog

the Ram to the Reference Position

Test

for Proper System Operation

Troubleshoot Possible Problems

Using

Status Bits for Errors Detected by the Module Troubleshooting Conditions

That Control Module Outputs

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . .

able

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Module Specifications

Electrical Physical Environmental

Specifications

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . .

Ladder Program

. . . . . . . . . .

. . . . . . . . . . . . . . . . . .

5–1. . . . . . . . . . . . . . .

5–1 5–1 5–1 5–2 5–2 5–3 5–4 5–4 5–4 5–5 5–5

A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

A–1 A–1 A–1

B–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SLC Processor Files

Input G

File

Output

Image T

able

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Image T

able

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

C–1 C–2 C–2





Chapter Objectives

What Is the 1746-QV Module?

What Is an SLC-500 System?

This chapter presents a conceptual overview of how you use the 1746-QV module in an application.

The 1746-QV module is part of an SLC-based open-loop control system for controlling the speed and placement of an hydraulic ram. The module accepts an input from a linear displacement transducer (LDT) and motion profiles that you program into the SLC processor, and varies its output in the range of "10V dc. The SLC processor sends to the module a pair of extend and retract profiles that define when to accelerate or decelerate hydraulic motion.

The Allen-Bradley Small Logic Controller (SLC) system is a programmable control system with an SLC processor, I/O chassis containing analog, digital, and/or special-purpose modules, and a power supply. The 1746-QV module interfaces your hydraulic ram and position-monitoring device (LDT) to the ladder sequence in your SLC processor. The system can be illustrated as follows:

Power Supply

SLC-500 Processor

Position Input from LDT

HYDRAULIC

RUN

FAULT LDT/"10V DC

1746-QV module

Analog Output

"10v dc

Piston-type Hydraulic Cylinder and Linear Displacement Transducer (LDT)

Axis Motion

Proportional Amplifier

Publication

Proportional Valve

1746-6.18 April 1998

1–2

Position

Head

System Overview

Why Use This System?

How Does It Work?

Extend Direction

Voltage

Segments

Because you can change the speed of the hydraulic ram with extend and retract profiles and store additional profiles (recipes) in data table iNteger (N) files, this control system has these benefits:

• reduced cycle time – you can increase ram speed for faster operation

• reduced or eliminated pressure spikes and water-hammering for

smoother operation and less wear and tear on the machine – you can profile accelerations and decelerations of the hydraulic ram

• energy savings – you can match the speed of the hydraulic pump

to the force that you need

• faster new-part change-over – you can store your setups and

minimize mechanical re-adjustments between parts

The 1746-QV module executes the extend and retract profiles that you load to control the motion of the hydraulic ram. You can program up to seven different voltages over the length of travel in both the extend and retract directions to control how the ram accelerates or decelerates.

Retract Direction

Voltage

Segments

LDT

What Are Typical Applications?

LDT

Each position setpoint triggers a corresponding voltage output in the range of –10V to +10V dc that translates into speed. The LDT provides high-speed position updates to the module for consistent and repeatable motion.

Use the 1746-QV module in an SLC-based system for low-cost control of:

• hydraulic machinery

• simple (non-CNC) hydraulic presses

• diecasting machinery

• welder placement

• pneumatic actuators for clamping or placement

In addition, the module is designed to support standard proportional amplifiers and retrofit into most existing hydraulic systems.

Publication

1746-6.18 April 1998

Procedure





Use this chapter as an abbreviated procedure for getting the 1746-QV module into operation or as an overview if you need more information.

1746-QV Module Input Terminal Block

(+) Gate Out

(–) Gate Out

(–) Interrogate

(+) Interrogate

Shield/Frame

–15V dc PS

PS Common

+15v dc PS

Load Ladder Logic into Your Computer Chapter 3

Obtain the ladder program (appendix B) from Rockwell Software Bulletin Board (BBS) or the Internet.

From

BBS:

in the Allen-Bradley Products Library directory

and decompress it with PKUNZIP available on BBS. The ladder program, VELMOD, is SLC500

code (65 Kbyte).

Download it into a hard drive subdirectory where your programming software looks for files.

The

(216) 646-ROCK (-7625). If a new user

, follow prompts to register

manual is in W

ord format. Download it

. Log in. Look for 1746QV

into a hard drive sub-

From Internet: webpage http://www.ab.com If a new user, click Join Now and follow prompts to

button. The manual is PDF format and requires Adobe Acrobat viewer

. The ladder program is PDF

format and must be entered manually.

Set Up Your Software Chapter 3

Configure the SLC Processor and I/O with your programming software. Enter the following:

a) processor type, b) module I/O-chassis slot, c) module ID (13115), d) G-file size (7 words), and e) G-file configuration values from the ladder program (appendix B).

Modify N files for the profile found in the ladder program (appendix B) to suite your application.

Connect the LDT to the Module’s Input Terminal Block Chapter 4

The following are connections between the 1746-QV module and typical LDTs such as Temposonics, Balluff, Santest, and Gemco.

Interrogate

Temposonics II, RPM or DPM

(+)

(–)

"15V

PS Common

Frame

23456789

GND

(+)

Gate

Out

dc PS

The

views are looking at the connector on the LDT head.

Balluff BTL-2-L2 & -2-M2

Interrogate (–)

"15V dc PS

Gate

7 (+)

Out (–)

Gate

(–)

PS Common

Out (+)

Interrogate (+)

Santest GYRP & GYRG

+15V dc PS

Gate Out (+)

Interrogate

PS Common

(+)

(–)

Gate Out (–)

Gemco Quick-Stick II 951VP

w/PWM

Output

B–BLK PS Common C–RED +15V dc PS K–GRY + Interrogate E–BRN –Sq Wave Out* F–BLU +Sq Wave Out* A–WHT –Interrogate G, D, H RS232RXD J–PUR 2nd PS COM

*951RS has pulse trigger

1746-QV Input Pin #

(+) and (–) wires of same function should be a twisted pair within the cable. Note 1: In the table, we use the term “gate out” for pulse trigger or square wave (Gemco) and start/stop (Balluf

Function Temposonics II

(+) Gate Out

(–) Gate Out

(–) Interrogate

(+) Interrogate 4 Shield/Frame n/a 3

–15V dc PS 2 PS 1 +15V dc PS

Common

RPM or DPM

4 – Pink 3 – Gray 10 – Green 9 – Y

6 – Blue 1 – White 5 – Red

ellow

Balluff BTL-2-L2 & -M2

2 – Gray (note 1) 5 – Green (note 1) 3 – Pink 1 – Yellow n/a 8 – White 6 – Blue 7 – Brown

Santest GYRP/GYRG

4 n/a n/a n/a n/a pin

3 pin

f -M2) LDT signals.

Publication

Gemco

Quick-

Stick 951VP/RS

F – Blue (note 1) E – Brown (note 1) A – White K – Gray

B – Black C – Red

1746-6.18 April 1998

2–2

Quick Start

Important:

output cable to a 0V connection in the amplifier

1746-QV Terminal Block

Connect Module Output Terminals to Output Devices With Correct Bonding Chapter 4

Connect the shield of the amplifier

Analog Output ("

Output

2 1

10v dc)

Servo Amplifier (Proportional)

(+)

Dif

Input

(–)

Outputs to valves

A B

Minimize Interference from Electrical Noise with Correct Shielding and Grounding Chapter 4

Important: Connect PS output commons togerther.

Connect the following to earth ground: a) cable shields (except for amplifier outputs) at one end only b) input terminal 4, c) case grounds of PS and amplifier, e) LDT flange.

Case GND

Important:

connect PS output commons together and isolate from earth ground.

Belden 8761

For correct bonding,

ransducer (LDT)

LDT Power

LDT Signals

1746-QV Module

Input

1 2 3

5-8

Output

earth ground

15V PS

(+) (C) (–)

Belden 8770

Analog Output

Piston-type Hydraulic Cylinder and Linear Displacement T

+24V dc PS 0V dc PS

Do NOT connect output shields to earth ground

o solenoid A

o solenoid B

24V PS

(–) (+)

Servo Proportional Amplifier

Valves

Case GND

Belden 8761

Case GND

Cable Note

Cable Note: Use cable recommended by the LDT and amplifier manufacturer

Publication

1746-6.18 April 1998

LDT

Cable

Note

After

loading profiles with the ladder program (step 1), alternately

Operate the Module for the First time Chapter 5

and Hydraulic Ram

run the extend profile (O:e.0/0 = 0-to-1),

then the retract profile (O:e.0/1 = 0-to-1). Modify the profile to reach the preset reference, and set it.

Important:

If motion is reversed: for a "10V dc output, change the sign (") of all extend/retract voltage

values; or for a +10V output, energize the other solenoid on the directional valve (with ladder logic).

To do this:

load all profiles 1 N7:40 set preset reference to zero clear errors read current position run an extend profile run a retract profile

Enter decimal:

8 N7:50

16 N7:50

read, only

1 N7:50 2 N7:50

at address:

N7:61



Setting Up the Software

Chapter Objectives

Obtaining the Ladder Program Electronically from BBS or the Internet

This chapter helps you do the following:

• Obtain the ladder program electronically

• Configure your SLC processor off-line

• Modify N files in your SLC processor, off-line

• General conventions for profiles

• Profile operation

You can obtain ladder logic electronically and download it to your SLC processor conveniently without the worry of data-entry errors.

About the Rockwell Bulletin Board System (BBS)

You can access the Rockwell Software Bulletin Board System (BBS) by modem. Anyone is welcome. The BBS provides utilities, examples, and technical information on Rockwell Software products and on selected Allen-Bradley products.

• new users may:

– send and receive messages – download General Access files – upload files for review by technical support specialists

• verified customers may:

– search for new and existing files – download files such as utilities, example programs, tech info – access software bulletins

• subscribers to tech bulletins, DataDisc CD-ROM may:

– download tech bulletins of the Tech Bulletin Subscription series

User accounts are automatically generated online. We use our product data base to verify BBS accounts at your initial log-in, and we adjust your security level according to your support status. Should your registration information change, you can update your account from the “Configure System Defaults” menu.

To Access BBS:

1. Set your modem to no parity, 8 data bits, and 1 stop bit.

2. Dial (216) 646-ROCK (-7625).

3. Follow prompts to log in. New users must create a new account.

4. Look for 1746QV in the Allen-Bradley Products Library. The manual

is formatted in Microsoft Word and compressed with PKZIP. The ladder program, VELMOD, is SLC code.

Publication

1746-6.18 April 1998

+ 24 hidden pages