Category: A-B

ControlLogix modules mount in a ControlLogix chassis and require either a

removable terminal block (RTB) or a Bulletin 1492 wiring interface module

(IFM)(1) to connect all field-side wiring.

Before you install and use your module, you must do the following:

• Install and ground a 1756 chassis and power supply. To install these

products, refer to the publications listed in

• Order and receive an RTB or IFM and its components for yourapplication.

1756-IA8D 79…132V AC 8-point diagnostic input module

1756-IA16 74…132V AC 16-point input module

1756-IA16I 79…132V AC 16-point isolated input module

1756-IA32 74…132V AC 32-point input module

1756-IB16 10…31.2V DC 16-point input module

1756-IB16D 10…30V DC diagnostic input module

1756-IB16I 10…30V DC 16-point, isolated input module

1756-IB16IF 10…30V DC,16-point, isolated, fast peer control input module

1756-IB32 10…31.2V DC 32-point input module

1756-IC16 30…60V DC 16-point input module

1756-IG16 Transitor-transitor logic (TTL) input module

1756-IH16I 90…146V DC 16-point isolated input module

1756-IM16I 159…265V AC 16-point isolated input module

1756-IN16 10…30V AC 16-point input module

1756-IV16 10…30V DC 16-point sourcing current input module

1756-IV32 10…30V DC 32-point sourcing current input module

1756-OA8 74…265V AC 8-point output module

1756-OA8D 74…132V AC 8-point diagnostic output module

1756-OA8E 74…132V AC 8-point electronically-fused output module

1756-OA16 74… 265V AC 16-point output module

1756-OA16I 74…265V AC 16-point isolated output module

1756-OB8 10…30V DC 8-point output module

1756-OB8EI 10…30V DC 8-point electronically-fused, isolated output module

1756-OB8I 10…30V DC 8-point isolated output module

1756-OB16D 19.2…30V DC 16-point diagnostic output module

1756-OB16E 10…31.2V DC 16-point electronically-fused output module

1756-OB16I 10…30V DC 16-point isolated output module

1756-OB16IEF 10…30V DC,16-point, isolated, fast peer control output module

1756-OB16IEFS 10…30V DC, 16-point, isolated, fast, scheduled per point output module

1756-OB16IS 10…30V DC scheduled, isolated output module

1756-OB32 10…31.2V DC 32-point output module

1756-OC8 30…60V DC 8-point output module

1756-OG16 Transitor-transitor logic (TTL) output module

1756-OH81 90…146V DC 8-point isolated output module

1756-ON8 10…30V AC 8-point output module

1756-OV16E 10…30V DC 16-point electronically-fused, sinking current output module

1756-OV32E 10…30V DC 32-point electronically-fused, sinking current output module

1756-OW16I 10…265V, 5-150V DC 16-point isolated contact module

1756-OX8I 10…265V, 5-150V DC 8-point isolated contact module

Analog Input Modules

1756-IF6CIS

1756-IF6I

1756-IF8

1756-IF8H

1756-IF8I

1756-IF8IH

1756-IF16

1756-IF16H

1756-IF16IH

ControlLogix® digital I/O modules are input and output modules that provide

On/Off detection and actuation. By using the producer/consumer network

model, digital I/O modules can produce information when needed while

providing additional system functions.

I/O modules in a ControlLogix system can be owned by a Logix5000™

controller. An owner-controller fulfills these functions:

• Stores configuration data for every module that it owns

• Sends I/O modules configuration data to define module behavior and

begin module operation with the control system

• Resides in a local or remote chassis in regard to the I/O module position

Each ControlLogix I/O module must continuously maintain communication

with its owner-controller to operate normally.

Typically, each module in the system has only one owner-controller.

Input modules can have more than one owner-controller.

Output modules, however,are limited to a single owner-controller.

ControlLogix System Overview

The ControlLogix system provides discrete, drives, motion, process,

and safety control together with communication and state-of-the-art I/O in a small, cost-competitive package. 

The system is modular, so you can design, build, and modify it efficiently with significant

savings in training and engineering. A simple ControlLogix system consists

of a standalone controller and I/O modules in one chassis.

For a more comprehensive system, use the following:

• Multiple controllers in one chassis

• Multiple controllers joined across networks

• I/O in multiple platforms that are distributed in many locations and connected over multiple I/O links

• Select ControlLogix products are available with a conformal coating that adds a layer

of protection when exposed to harsh, corrosive environments.

Products with a conformal coating have a ‘K’ suffix at the end of the catalog number. 

The ControlLogix controller is part of the Logix 5000™ family of controllers.

• ControlLogix controllers can monitor and control I/O across the ControlLogix backplane, and over I/O links.

ControlLogix controllers can communicate over EtherNet/IP, ControlNet, DeviceNet, DH+™,

Remote I/O, and RS-232-C (DF1/DH-485 protocol) networks and many third-party process and device networks.

• The controller can be placed into any slot of a ControlLogix chassis and

multiple controllers can be installed in the same chassis.

Multiple controllers in the same chassis communicate with each other over

the backplane (just as controllers can communicate over networks) but operate independently.

• To provide communication for a ControlLogix 5570 controller,

install the appropriate communication interface module into the chassis.

ControlLogix 5580 controllers have a built-in EtherNet/IP port.

The Example Application

This manual describes how to set up an example application. The

manual provides examples of each step of the setup, with references

to other manuals for more details.

System Components

We used the following devices and software for the example

application. For your own application, substitute your own devices to

fit your needs. The recommended configurations in this user manual

will help you set up the test system and get it working. Your eventual

configuration will depend on your application.

The 1747-SDN module communicates with DeviceNet devices over

the network to:

• read inputs from a device.

• write outputs to a device.

• download configuration data.

• monitor a device’s operational status.

The 1747-SDN module communicates with the processor in the form

of M1/M0 File Transfers and/or Discrete I/O. Information exchanged

includes the following:

• Device I/O data

• Status information

• Configuration data

A processor to I/O DeviceNet configuration is shown in the following

figure. See the referenced chapters for more information.

DIP Switches

DIP switches enable the 1747-DCM to properly interpret the RIO system addressing.

The 1747-DCM has two banks of DIP switches mounted on its circuit board. Each

bank contains eight switches. The default settings are shown below.

DIP Switch 1 Settings

Chassis Address (SW1-1 through SW1-6)

The chassis address refers to the logical chassis number from the scanner image

that contains a particular 1747-DCM’s image.

The table on the following page shows the settings that define possible chassis

address choices for all scanners. To use this table, first determine which of the

following categories applies to your scanner.

• PLC-2, mini-PLCs, PLC-2/30 with 1770-SD, SD2 remote scanner

• PLC-3 and PLC-5/250 processors (This category includes those with built-in

scanners, as well as the following, without built-in scanners: 1775-54A, -54B,

-S5, SR, -SR5, and 5250-RS.)

• SLC-5/02 (or above) with 1747-SN scanner

After determining which category applies to your 1747-DCM application:

1. Find the column for the scanner used in your application.

2. Go down the column to the chassis address that you assigned to the 1747-DCM.

3. Use the switch settings in the right-most columns of the table that

correspond to your chassis address.

Use of the Common

Industrial Protocol (CIP)

The adapter uses the Common Industrial Protocol (CIP), the application layer

protocol specified for EtherNet/IP, the Ethernet Industrial Protocol. It is a

message-based protocol that implements a relative path to send a message

from the producing device in a system to the consuming devices.

The producing device contains the path information that steers the message

along the proper route to reach its consumers. Since the producing device

holds this information, other devices along the path simply pass this

information; they do not store it.

This has the following significant benefits:

• You do not need to configure routing tables in the bridging modules,

which greatly simplifies maintenance and module replacement.

• You maintain full control over the route taken by each message, which

enables you to select alternative paths for the same end device.

The 1747-AENTR in a Logix System

In this example, the I/O modules communicate with the controller through the

1747-AENTR adapter. The controller can produce and consume tags to the I/O.

Configuration of devices and the network is done through the personal

computer running the controller and configuration software.

Diagnostic Indicators The module has the following diagnostic indicators:

• Link 1 and Link 2 status indicator

• Module indicator

• 4-character status display

What the Adapter Does The 1747-AENTR EtherNet/IP adapter performs the following primary tasks:

• Control of real-time I/O data (also known as implicit messaging) – the

adapter serves as a bridge between I/O modules and the network

• Support of messaging data for configuration and programming

information (also known as explicit messaging)

Output Polarity

In most hydraulic systems, the actuator extends (with increasing

LDT counts) when a positive voltage is sent to the output. The

extend direction is defined as the direction that causes the LDT to

return increasing counts moving away from the head.

You can make these selections in the Config word that affect output:

• To generate a positive drive output (0-10V dc) regardless of move

direction, you can select Absolute Mode.

• To extend the actuator by sending a negative voltage to the

output, you can select Reverse Drive Mode.

For additional information on the Configuration word, select that

subject in Help Topics.

Checking Out the Wiring and Grounding

Repeat this procedure to check out each of the four axis loops

connected to the IFM terminal block.

ATTENTION: Be sure to remove all power to the SLC processor,

LDT, valve and pump beforehand.

1. Disconnect the LDT connector at the head end.

2. Disconnect the connector to the IFM terminal block.

3. Turn ON the power supplies for the LDT and SLC processor, and

check the LDT connector and IFM terminal block for:

• +15V dc

• PS common

• –15V dc

4. Observe that the module’s fault LED indicates Green.

5. Verify continuity between IFM COM terminal (50) and each of:

• shield of the amplifier output cable to the valve

• output common on

How Does It Work?

Monitoring Axis Position

The module has four LDT inputs. You configure each axis for an LDT

with a Pulse Width Modulated output (DPM) or a Start/Stop output

(RPM) by changing axis configuration parameters.

Controlling Axis Output

The module is a targeting controller: every two milliseconds its microprocessor

updates TARGET POSITION and target SPEED values. For

point-to-point moves, TARGET POSITIONS are generated so that

resulting speed, accelerations, and decelerations follow either a

trapezoidal or s-curve profile.

The MODE, ACCELERATION, DECELERATION, SPEED, and

COMMAND VALUE (requested position) are used to generate the

profile. You send these command words to the module through the

processor’s output image table. You may change them “on-the-fly“

while the axis is moving.

The module compares ACTUAL POSITION with TARGET POSITION to

determine position error. Every update, it uses the position error to adjust

drive output. PID gains are adjustable and can be applied selectively.

Why Use This System?

Because you can interact quickly and easily with the module’s control of

axis motion via the Hydraulic Configurator, this control system has

these benefits:

• faster setup and tuning of axes – the Hydraulic Configurator lets you

quickly set up and tune each axis independent of your ladder program.

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

• smoother operation for longer machine life – you can profile accelerations

and decelerations of the hydraulic actuator to limit pressure spikes

• faster change-over to new parts – you can store setups (configuration

parameters) for quick an accurate change-over between parts

The module compares ACTUAL POSITION with TARGET POSITION to

determine position error. Every update, it uses the position error to adjust

drive output. PID gains are adjustable and can be applied selectively.

The module also provides two different feedforward algorithms;

EXTEND/RETRACT FEEDFORWARD, and EXTEND/RETRACT

ACCELERATION FEEDFORWARD. These feedforward terms provide

additional drive output to help the axis follow the target, freeing the

PID loop to correct for system nonlinearity and changes in load.