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.

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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

Table of Contents

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

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

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

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

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

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

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

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

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

T

able

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

Module Specifications

Electrical
Physical
Environmental

Specifications

Specifications

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

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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

Position

Head

Head

System Overview

Why Use This System?

How Does It Work?

Extend Direction

3

Voltage

2

1

4

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

4

5

6

7

Voltage

1

3

2

Segments

5

6

7

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

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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

8

(–) Gate Out

7

(–) Interrogate

6

(+) Interrogate

5

Shield/Frame

4

–15V dc PS

3

PS Common

2

+15v dc PS

1

1.

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

register. Log in. Search for QV: on homepage, click Search Our Site, insert QV in window, and click

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

search

. The ladder program is PDF

format and must be entered manually.

2.

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.

3.

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

(+)

(+)

10

(–)

(–)

(–)

"15V

PS
Common

1

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 (–)

3

"15V
dc PS

Gate

7 (+)

Out (–)

Gate

2

45

(–)

8

6

PS
Common

Out (+)

1

Interro­gate (+)

Santest
GYRP & GYRG

+15V
dc PS

Gate
Out (+)

NC

1

5

Interrogate

2

4

6

PS
Common

3

(+)

7

(–)

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

8

(+) Gate Out

7

(–) Gate Out

6

(–) Interrogate

5

(+) 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

pin

5

pin

7

pin

6

pin

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

3
pin

1

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

4.

Important:

output cable to a 0V connection in the amplifier

1746-QV
Terminal Block

5.

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

f.

Input

(–)

Outputs
to valves

0V

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

4

2

Output

1

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

T

o solenoid A

T

o solenoid B

,

24V PS

(–) (+)

Servo
Proportional
Amplifier

0V

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

6.

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

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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