Rockwell Automation Allen-Bradley 1769-OF2 User Manual

160 mA

125 mA

mounting. For mounting instructions, see Panel Mounting Using the

If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.

Compact I/O is suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for use in clean, dry environments (Pollution degree 2

(1)

) and to circuits not exceeding Over Voltage Category II

(2)

(IEC 60664-1).

(3)

Publication 1769-UM002B-EN-P - July 2005

(1)

Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected.

(2)

Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation.

(3)

Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations.

Installation and Wiring 2-3

Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-hazardous locations only. The following WARNING statement applies to use in hazardous locations.

ATTENTION

EXPLOSION HAZARD

• Substitution of components may impair suitability for

Class I, Division 2.

• Do not replace components or disconnect equipment unless power has been switched off or the area is known to be non-hazardous.

• Do not connect or disconnect components unless power has been switched off or the area is known to be non-hazardous.

• This product must be installed in an enclosure.

• All wiring must comply with N.E.C. article 501-4(b).

Prevent Electrostatic Discharge

ATTENTION

Electrostatic discharge can damage integrated circuits or semiconductors if you touch analog I/O module bus connector pins or the terminal block on the input module.

Follow these guidelines when you handle the module:

• Touch a grounded object to discharge static potential.

• Wear an approved wrist-strap grounding device.

• Do not touch the bus connector or connector pins.

• Do not touch circuit components inside the module.

• If available, use a static-safe work station.

• When it is not in use, keep the module in its static-shield box.

Publication 1769-UM002B-EN-P - July 2005

2-4 Installation and Wiring

System Assembly

Publication 1769-UM002B-EN-P - July 2005

Remove Power

ATTENTION

Remove power before removing or inserting this module.

When you remove or insert a module with power applied, an electrical arc may occur. An electrical arc can cause personal injury or property damage by:

• sending an erroneous signal to your system’s field devices, causing unintended machine motion

• causing an explosion in a hazardous environment

• Electrical arcing causes excessive wear to contacts on both the module and its mating connector and may lead to premature failure.

Reducing Noise

Most applications require installation in an industrial enclosure to reduce the effects of electrical interference. Analog inputs and outputs are highly susceptible to electrical noise. Electrical noise coupled to the analog inputs will reduce the performance (accuracy) of the module.

Group your modules to minimize adverse effects from radiated electrical noise and heat. Consider the following conditions when selecting a location for the analog module. Position the module:

• away from sources of electrical noise such as hard-contact switches, relays, and AC motor drives

• away from modules which generate significant radiated heat, such as the

1769-IA16. Refer to the module’s heat dissipation specification.

In addition, route shielded, twisted-pair analog input and output wiring away from any high voltage I/O wiring.

Protecting the Circuit Board from Contamination

The printed circuit boards of the analog modules must be protected from dirt, oil, moisture, and other airborne contaminants. To protect these boards, the system must be installed in an enclosure suitable for the environment. The interior of the enclosure should be kept clean and the enclosure door should be kept closed whenever possible.

The module can be attached to the controller or an adjacent I/O module before or after

Dimensional Template on page 2-7, or DIN Rail Mounting on page 2-8. To

Installation and Wiring 2-5

work with a system that is already mounted, see Replacing a Single Module within a System on page 2-9.

Figure 2.1 Assemble the Compact I/O System

Disconnect power.

Check that the bus lever of the module to be installed is in the unlocked

(fully right) position.

Use the upper and lower tongue-and-groove slots (1) to secure the modules together (or to a controller).

Move the module back along the tongue-and-groove slots until the bus connectors (2) line up with each other.

Push the bus lever back slightly to clear the positioning tab (3). Use your fingers or a small screwdriver.

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2-6 Installation and Wiring

Mounting

Publication 1769-UM002B-EN-P - July 2005

To allow communication between the controller and module, move the bus lever fully to the left (4) until it clicks. Ensure it is locked firmly in place.

ATTENTION

When attaching I/O modules, it is very important that the bus connectors are securely locked together to ensure proper electrical connection.

Attach an end cap terminator (5) to the last module in the system by using the tongue-and-groove slots as before.

Lock the end cap bus terminator (6).

IMPORTANT

A 1769-ECR or 1769-ECL right or left end cap must be used to terminate the end of the bus.

ATTENTION

During panel or DIN rail mounting of all devices, be sure that all debris (metal chips, wire strands, etc.) is kept from falling into the module. Debris that falls into the module could cause damage at power up.

Minimum Spacing

Maintain spacing from enclosure walls, wireways, adjacent equipment, etc.

Allow 50 mm (2 in.) of space on all sides for adequate ventilation.

Figure 2.2 Space Requirements

Top

Side Side

Host Controller

Bottom

Installation and Wiring 2-7

Panel Mounting

Mount the module to a panel using two screws per module. Use M4 or #8 panhead screws. Mounting screws are required on every module.

Figure 2.3 Panel Mounting Using the Dimensional Template

For more than 2 modules: (number of modules-1) X 35 mm (1,38 in.).

Refer to host controller documentation for this dimension.

(1.38)

28.5

(1.12)

132

(5.197)

122.6±0.2

(4.826±0.008)

NOTE: All dimensions are in mm (inches).

Hole spacing tolerance: ±0.04 mm (0.016 in.).

Figure 2.4 Panel Mounting for the 1769-IF8 Using the Dimensional Template

Spacing for single-wide modules 35 mm (1.378 in).

Spacing for one-and-a-half-wide modules 52.5 mm (2.067 in).

Refer to host controller documentation for this dimension.

NOTE: Overall hole spacing tolerance: ±0.4 mm (0.016 in.)

Locate holes every 17.5 mm (0.689 in) to allow for a mix of single-wide and one-and-a-half-wide modules

(e.g., 1769-OA16).

Publication 1769-UM002B-EN-P - July 2005

2-8 Installation and Wiring

Panel Mounting Procedure Using Modules as a Template

The following procedure allows you to use the assembled modules as a template for drilling holes in the panel. If you have sophisticated panel mounting equipment, you can use the dimensional template provided on

page 2-7. Due to module mounting hole tolerance, it is important to follow

these procedures:

On a clean work surface, assemble no more than three modules.

Using the assembled modules as a template, carefully mark the center of all module-mounting holes on the panel.

Return the assembled modules to the clean work surface, including any previously mounted modules.

Drill and tap the mounting holes for the recommended M4 or #8 screw.

Place the modules back on the panel, and check for proper hole alignment.

Attach the modules to the panel using the mounting screws.

TIP

If mounting more modules, mount only the last one of this group and put the others aside. This reduces remounting time during drilling and tapping of the next group.

Repeat steps 1 to 6 for any remaining modules.

DIN Rail Mounting

The module can be mounted using the following DIN rails:

35 x 7.5 mm (EN 50 022 - 35 x 7.5) or 35 x 15 mm (EN 50 022 - 35 x 15).

Before mounting the module on a DIN rail, close the DIN rail latches. Press the DIN rail mounting area of the module against the DIN rail. The latches will momentarily open and lock into place.

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-9

Replacing a Single Module within a System

The module can be replaced while the system is mounted to a panel (or DIN rail). Follow these steps in order:

Remove power. See important note on 2-4.

On the module to be removed, remove the upper and lower mounting screws from the module (or open the DIN latches using a flat-blade or phillips-style screwdriver).

Move the bus lever to the right to disconnect (unlock) the bus.

On the right-side adjacent module, move its bus lever to the right

(unlock) to disconnect it from the module to be removed.

Gently slide the disconnected module forward. If you feel excessive resistance, check that the module has been disconnected from the bus, and that both mounting screws have been removed (or DIN latches opened).

TIP

It may be necessary to rock the module slightly from front to back to remove it, or, in a panel-mounted system, to loosen the screws of adjacent modules.

Before installing the replacement module, be sure that the bus lever on the module to be installed and on the right-side adjacent module are in the unlocked (fully right) position.

Slide the replacement module into the open slot.

Connect the modules together by locking (fully left) the bus levers on the replacement module and the right-side adjacent module.

Replace the mounting screws (or snap the module onto the DIN rail).

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2-10 Installation and Wiring

External Power Switch

The analog modules have an external 24V dc power switch which gives you the option of using an external power supply. The switch is located in on the lower left portion of the module’s circuit board, as shown below. With the switch pressed on the top (default), 24V dc power is drawn from the 1769 system power supply via the 1769 I/O bus. Pressed on the bottom, 24V dc power is drawn from the external power supply.

Wire the external power supply to the module via the module’s terminal block.

The external power supply must be Class 2 rated, with a 24V dc range of 20.4 to 26.4V dc and a minimum current rating that meets the needs of the modules

used in your application. Refer to Maximum Current Draw on page 2-2.

IMPORTANT

Only 1769-IF4 and -OF2 Series B modules have the 24V dc power switch.

Figure 2.5 External Power Switch

1769-IF4 and -OF2 Modules 1769-OF8C and -OF8V Modules

External Power

Supply Switch

External Power Switch

Pressed on the Top

Bus Power (default)

Pressed on the Bottom

External Power Bus Power (default)

External Power

Field Wiring Connections

Grounding

This product is intended to be mounted to a well-grounded mounting surface such as a metal panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if used) are not required unless the mounting surface cannot be grounded. Refer to Industrial Automation Wiring and Grounding

Guidelines , Allen-Bradley publication 1770-4.1, for additional information.

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-11

System Wiring Guidelines

Consider the following when wiring your system:

General

• All module commons (ANLG COM) are connected in the analog module. The analog common (ANLG COM) is not connected to earth ground inside the module.

• Channels are not isolated from each other.

• Do not use the analog module’s NC terminals as connection points.

• To ensure optimum accuracy, limit overall cable impedance by keeping your cable as short as possible. Locate the I/O system as close to your sensors or actuators as your application will permit.

• Use Belden™ 8761, or equivalent, shielded wire.

• Keep shield connection to ground as short as possible.

• Under normal conditions, the drain wire and shield junction must be connected to earth ground via a panel or DIN rail mounting screw at the analog I/O module end.

(1)

1769-IF4 and -IF8 Input Modules

• If multiple power supplies are used with analog inputs, the power supply commons must be connected together.

• The 1769-IF4 and -IF8 modules do not provide loop power for analog inputs. Use a power supply that matches the input transmitter specifications.

• Differential analog inputs are more immune to noise than single-ended analog inputs.

• Voltages on Vin+, V/Iin-, and Iin+ of the 1769-IF4 and -IF8 modules must be within ±10V dc of analog common.

1769-OF2, -OF8C, and -OF8V Output Modules

• Voltage outputs (Vout 0+ and Vout 1+ for 1769-OF2, Vout 0+ through Vout 7+ for 1769-OF8V) of the output modules are referenced to ANLG COM. Load resistance for a voltage output channel must be equal to or greater than 1K Ω .

• Current outputs (Iout 0+ and Iout 1+ for 1769-OF2, Iout 0+ through

Iout 7+ for 1769-OF8C) of the output modules source current that returns to ANLG COM. Load resistance for a current output channel must remain between 0 and 500 Ω .

(1)

In environments where high-frequency noise may be present, it may be necessary to directly ground cable shields to earth at the module end and via a 0.1µF capacitor at the sensor end.

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2-12 Installation and Wiring

Effect of Transducer/Sensor and Cable Length Impedance on Voltage Input

Accuracy

For voltage inputs, the length of the cable used between the transducer/sensor and the 1769-IF4 or -IF8 module can affect the accuracy of the data provided by the module.

Figure 2.6 Voltage Input Accuracy

Rs Rc

V in

Where:

Rc = DC resistance of the cable (each conductor) depending on

cable length

Rs = Source impedance of analog transducer/sensor input

Ri = Impedance of the voltage input

(220 K Ω for 1769-IF4 and -IF8)

Vs = Voltage source

(voltage at the transducer/sensor input device)

Vin = Measured potential at the module input

%Ai = Percent added inaccuracy in a voltage-based system due

to source and cable impedance.

Vin =

[

Rs +

[

(

)

]

+ Ri

]

For example, for Belden 8761 two conductor, shielded cable:

Rc = 16 Ω /1000 ft

Rs = 0 (ideal source)

% Ai =

⎛

⎝ 1

∠ ---------

⎞

⎠

100

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-13

Table 2.2 Effect of Cable Length on Input Accuracy

Length of Cable (m)

100

200

300 dc resistance of the cable,

2.625

5.25

10.50

15.75

Rc (

Ω

)

Accuracy impact at the input module

0.00238%

0.00477%

0.00954%

0.0143%

As input source impedance (Rs) and/or resistance (dc) of the cable (Rc) get larger, system accuracy decreases. If you determine that the inaccuracy error is significant, implementing the following equation in the control program can compensate for the added inaccuracy error due to the impedance of the source and cable.

Vs = Vin

[

Rs + 2

)

+ Ri

]

TIP

In a current loop system, source and cable impedance do not impact system accuracy.

Effect of Device and Cable Output Impedance on Output Module Accuracy

The maximum value of the output impedance is shown in the example below, because it creates the largest deviation from an ideal voltage source.

Figure 2.7 Output Module Accuracy

Rs Rc

V in

Where:

Rc = DC resistance of the cable (each conductor)

depending on cable length

Rs = Source impedance

(15 Ω for 1769-OF2 and 1 Ω for 1769-OF8V)

Ri = Impedance of the voltage input

(220 K Ω for 1769-IF4)

Vs = Voltage at the output of 1769-OF2

Vin = Measured potential at the module input

%Ai = Percent added inaccuracy in a voltage-based

system due to source and cable impedance.

Vin =

[

Rs +

[

(

)

]

+ Ri

]

Publication 1769-UM002B-EN-P - July 2005

2-14 Installation and Wiring

For example, for Belden 8761 two conductor, shielded cable and a 1769-IF4 input module:

Rc = 16 Ω /1000 ft

Rs = 15 Ω

Ri = 220 K Ω

% Ai =

⎛

⎝ 1

∠ ---------

⎞

⎠

100

Table 2.3 Effect of Output Impedance and Cable Length on Accuracy

Length of Cable (m)

100

200

300 dc resistance of the cable

Rc (

Ω

)

2.625

5.25

10.50

15.75

Accuracy impact at the input module

0.00919%

0.01157%

0.01634%

0.02111%

As output impedance (Rs) and/or resistance (dc) of the cable (Rc) get larger, system accuracy decreases. If you determine that the inaccuracy error is significant, implementing the following equation in the control program can compensate for the added inaccuracy error due to the impedance of the output module and cable.

Vs = Vin

[

Rs + 2

)

+ Ri

]

TIP

In a current loop system, source and cable impedance do not impact system accuracy.

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-15

Labeling the Terminals

A removable, write-on label is provided with the module. Remove the label from the door, mark the identification of each terminal with permanent ink, and slide the label back into the door. Your markings (ID tag) will be visible when the module door is closed.

Figure 2.8 Terminal Labels upper retaining screw wiring the finger-safe terminal block lower retaining screw

Removing the Finger-Safe Terminal Block

When wiring field devices to the module, it is not necessary to remove the terminal block. If you remove the terminal block, use the write-on label on the side of the terminal block to identify the module slot location and type. RTB position can be indicated by circling either the ‘R’ for right side or ‘L’ for left side.

Figure 2.9 Finger-Safe Terminal Block

SLOT # _____

MODULE TYPE ______

To remove the terminal block, loosen the upper and lower retaining screws.

The terminal block will back away from the module as you remove the screws.

When replacing the terminal block, torque the retaining screws to 0.46 Nm

(4.1 in-lbs).

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2-16 Installation and Wiring

Wiring the Finger-Safe Terminal Block

When wiring the terminal block, keep the finger-safe cover in place.

Loosen the terminal screws to be wired.

Begin wiring at the bottom of the terminal block and move up.

Route the wire under the terminal pressure plate. You can use the bare wire or a spade lug. The terminals accept a 6.35 mm (0.25 in.) spade lug.

TIP

The terminal screws are non-captive. Therefore, it is possible to use a ring lug [maximum 1/4 inch o.d. with a

0.139 inch minimum i.d. (M3.5)] with the module.

Tighten the terminal screw making sure the pressure plate secures the wire. Recommended torque when tightening terminal screws is 0.68 Nm

(6 in-lbs).

TIP

If you need to remove the finger-safe cover, insert a screwdriver into one of the square, wiring holes and gently pry the cover off. If you wire the terminal block with the finger-safe cover removed, you will not be able to put it back on the terminal block because the wires will be in the way.

Wire Size and Terminal Screw Torque

Each terminal accepts up to two wires.

Table 2.4 Terminal Wire Considerations

Wire Type

Solid Cu-90°C (194°F)

Stranded Cu-90°C (194°F)

Wire Size Terminal Screw

Torque

Retaining Screw

Torque

#14 to #22 AWG 0.68 Nm (6 in-lbs) 0.46 Nm (4.1 in-lbs)

#16 to #22 AWG 0.68 Nm (6 in-lbs) 0.46 Nm (4.1 in-lbs)

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Installation and Wiring 2-17

Wiring the Modules

ATTENTION

To prevent shock hazard, care should be taken when wiring the module to analog signal sources. Before wiring any analog module, disconnect power from the system power supply and from any other source to the analog module.

After the analog module is properly installed, follow the wiring procedure below. To ensure proper operation and high immunity to electrical noise, always use Belden™ 8761 (shielded, twisted-pair) or equivalent wire.

ATTENTION

When wiring an analog input, take care to avoid connecting a voltage source to a channel configured for current input.

Improper module operation or damage to the voltage source can occur.

Never connect a voltage or current source to an analog output channel.

Figure 2.10 Belden 8761 Wire cable

Cut foil shield and drain wire signal wire signal wire drain wire foil shield signal wire signal wire

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2-18 Installation and Wiring

To wire your module follow these steps.

At each end of the cable, strip some casing to expose the individual wires.

Trim the signal wires to 2-inch lengths. Strip about 3/16 inch (5 mm) of insulation away to expose the end of the wire.

ATTENTION

Be careful when stripping wires. Wire fragments that fall into a module could cause damage at power up.

At one end of the cable, twist the drain wire and foil shield together.

Under normal conditions, this drain wire and shield junction must be connected to earth ground, via a panel or DIN rail mounting screw at the analog I/O module end. Keep the length of the drain wire as short as possible.

In environments where high frequency noise may be present, it may be necessary to ground the cable shields to earth at the module end via a

0.1 µF capacitor at the sensor end for analog inputs and at the load end for analog outputs.

At the other end of the cable, cut the drain wire and foil shield back to the cable.

Connect the signal wires to the terminal block as shown in Analog Input

Modules Wiring on page 2-19 and Analog Output Modules Wiring on page 2-24. Connect the other end of the cable to the analog input or

output device.

Repeat steps 1 through 5 for each channel on the module.

Terminal Door Label

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-19

Analog Input Modules Wiring

Figure 2.11 1769-IF4 Terminal Layout

V/I in 0 -

ANLG Com

V/I in 1 -

ANLG Com

V/I in 2 -

ANLG Com

V/I in 3 -

ANLG Com dc NEUT

V in 0 +

I in 0 +

V in 1 +

I in 1 +

V in 2 +

I in 2 +

V in 3 +

I in 3 +

+24V dc

D A N G E R

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous.

V in 0 +

V/I in 0 -

ANLG

Com

I in 0+

V in 1 +

V/I in 1 -

ANLG

Com

I in 1+

V in 2 +

V/I in 2 -

ANLG

Com

I in 2+

V in 3 +

V/I in 3 -

ANLG

Com

I in 3+

+24V dc dc NEUT

Ensure Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-IF4

Figure 2.12 1769-IF4 Wiring Diagram Showing Differential Inputs

Belden 8761 cable (or equivalent)

–

1769-IF4

V/I in 0 -

V in 0 +

Analog

Source

+

I in 0+

ANLG Com

V in 1 +

V/I in 1 -

ANLG Com

I in 1+ earth ground shield locally at the module

V in 2 +

V/I in 2 -

I in 2+

ANLG Com

V in 3 +

V/I in 3 -

ANLG Com dc NEUT

I in 3+

+24V dc

External 24V dc

Power Supply

(1)

(optional)

(2)

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 60 mA minimum for a single input module.

(2 ) Series B and later modules provide this option.

Publication 1769-UM002B-EN-P - July 2005

2-20 Installation and Wiring

Figure 2.13 1769-IF4 Wiring Single-ended Sensor/Transmitter Types

1769-IF4 Terminal Block

Sensor/

Transmitter

Supply

Current

Transmitter

Signal

Voltage

Transmitter

Ground

Signal

Voltage

Transmitter

Ground

Signal

V in 0 +

V/I in 0 -

I in 0 +

ANLG Com

V in 1 +

V/I in 1 -

I in 1 +

ANLG Com

V in 2 +

V/I in 2 -

I in 2 +

ANLG Com

V in 3 +

V/I in 3 -

I in 3 +

ANLG Com

+24V dc dc NEUT

External 24V dc

Power Supply

(1)

(optional)

(2)

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 60 mA minimum for a single input module.

(2 ) Series B and later modules provide this option.

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-21

Figure 2.14 1769-IF4 Wiring Mixed Transmitter Types

Signal

Single-ended

–

Voltage

Transmitter

–

Differential

Voltage

Transmitter

Supply

Signal

–

Differential

Current

Transmitter

Supply

–

Signal

2-Wire Current

Transmitter

Signal

1769-IF4 Terminal Block

V in 0 +

V/I in 0 -

I in 0 +

ANLG Com

V in 1 +

V/I in 1 -

I in 1 +

ANLG Com

V in 2 +

V/I in 2 -

I in 2 +

ANLG Com

V in 3 +

V/I in 3 -

I in 3 +

ANLG Com

+24V dc dc NEUT

Sensor/Transmi tter Supply

–

External 24V dc

Power Supply

(optional)

(1)

–

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 60 mA minimum for a single input module.

(2) Series B and later modules provide this option.

Publication 1769-UM002B-EN-P - July 2005

2-22 Installation and Wiring

Figure 2.15 1769-IF8 Terminal Layout

V/I in 0-

ANLG Com

V/I in 1-

ANLG Com

V/I in 2-

ANLG Com

V/I in 3-

ANLG Com

V in 0+

I in 0

V/I in 4-

ANLG Com

V in 1+

V/I in 5-

I in 1

V in 2+

ANLG Com

V/I in 6-

I in 2

ANLG Com

V in 3+

V/I in 7-

I in 3

ANLG Com

V in 4+

I in 4

V in 5+

I in 5

V in 6+

I in 6

V in 7+

I in 7

Figure 2.16 1769-IF8 Wiring Differential Inputs

Belden 8761 cable (or equivalent)

–

V/I in 0-

ANLG Com

V/I in 1-

ANLG Com

V/I in 2-

ANLG Com

V/I in 3-

ANLG Com

V in 0+

I in 0+

V in 1+

I in 1+

V in 2+

I in 2+

V in 3+

I in 3+

+

earth ground the shield locally at the module

V/I in 4-

ANLG Com

V/I in 5-

ANLG Com

V/I in 6-

ANLG Com

V/I in 7-

ANLG Com

WARNING -Do Not

Remove RTB Unless

Area is Non-Hazardous

V in 0+

V/I in 0-

I in 0+

ANLG Com

V in 1+

V/I in 1-

I in 1+

ANLG Com

V/I in 2-

V in 2+

I in 2+

ANLG Com

V in 3+

V/I in 3-

I in 3+

ANLG Com

V/I in 4-

ANLG Com

V/I in 5-

ANLG Com

V/I in 6-

ANLG Com

V/I in 7-

ANLG Com

V in 4+

I in 4+

V in 5+

I in 5+

V in 6+

I in 6+

V in 7+

I in 7+

1769-IF8 analog source

V in 4+

I in 4+

V in 5+

I in 5+

V in 6+

I in 6+

V in 7+

I in 7+

–

+

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-23

Figure 2.17 1769-IF8 Wiring Single-Ended Sensor/Transmitter Types

1769-IF8 Terminal Block

Sensor/Tran smitter

Supply

(1)

Current

Transmitter

Signal

Voltage

Transmitter

Ground

Signal

Voltage

Transmitter

Ground

Signal

V in 0 +

V/I in 0 -

I in 0 +

ANLG C om

V in 1 +

V/I in 1 -

I in 1 +

ANLG C om

V in 2 +

V/I in 2 -

I in 2 +

ANLG C om

V in 3 +

V/I in 3 -

I in 3 +

ANLG C om

Wiring for channels 4-7 are identical.

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 60 mA minimum for a single input module.

Figure 2.18 1769-IF8 Wiring Mixed Transmitter Types

1769-IF8 Terminal Block

Single-ended

Voltage

Signal

V in 0 +

Transmitter (1)

– +

V/I in 0 -

Differential

Voltage

–

Signal

I in 0 +

ANLG Com

V in 1 +

V/I in 1 -

–

Transmitter

Supply +

I in 1 +

ANLG Com

Differential

Current

–

Transmitter

Supply +

–

Signal

V in 2 +

V/I in 2 -

I in 2 +

ANLG Com

V in 3 +

V/I in 3 -

I in 3 +

2-Wire

Current

Transmitter

Signal

ANLG Com

Sensor/

Transmitter

Supply

–

Wiring for channels 4-7 are identical.

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 60 mA minimum for a single input module.

Publication 1769-UM002B-EN-P - July 2005

2-24 Installation and Wiring

Analog Output Modules Wiring

Figure 2.19 1769-OF2 Terminal Layout

I out 0 +

I out 1 +

NC dc Neutral

V out 0 +

ANLG Com

V out 1 +

ANLG Com

+24V dc

Figure 2.20 1769-OF2 Wiring Diagram

Voltage Load earth ground

Current Load

External 24V dc

Power Supply

(optional)

(1) -

+ earth ground

D A N G E R

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous.

V in 0 +

V in 0 -

ANLG

Com 0

I in 0

V out 0 +

I out 0 +

ANLG Com

V out 1 +

I out 1 +

ANLG Com

+24V dc dc NEUT

ANLG

Com 3

I in 3

Ensure Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-OF2

1769-OF2 Terminal Block

V out 0 +

I out 0 +

ANLG Com

V out 1 +

I out 1 +

ANLG Com

+24V dc dc NEUT

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 120 mA minimum per output module.

Publication 1769-UM002B-EN-P - July 2005

Installation and Wiring 2-25

Figure 2.21 1769-OF8C Terminal Layout

I out 0+

I out 1+

I out 2+

I out 3+

I out 4+

I out 5+

I out 6+

I out 7+

+24V dc

Figure 2.22 1769-OF8C Wiring Diagram

ANLG Com

ANLG Com dc NEUT

D A N G E R

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous.

ANLG

I out 0+ C om

I out 1+

ANLG

C om

I out 2+

ANLG

C om

I out 3+

ANLG

C om

I out 4+

ANLG

C om

I out 5+

ANLG

C om

I out 6+

ANLG

C om

I out 7+

ANLG

C om

+24V dc dc NEUT

Ensure Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-OF8C

Current Load earth ground

External 24V dc Power +

Supply (optional)(1)

I out 0+

I out 1+

I out 2+

I out 3+

I out 4+

I out 5+

I out 6+

I out 7+

+24V dc

ANLG Com

ANLG Com dc NEUT

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 120 mA minimum per output module.

Publication 1769-UM002B-EN-P - July 2005

2-26 Installation and Wiring

Figure 2.23 1769-OF8V Terminal Layout

V out 0+

V out 1+

V out 2+

V out 3+

V out 4+

V out 5+

V out 6+

V out 7+

+24V dc

Figure 2.24 1769-OF8V Wiring Diagram

ANLG Com

ANLG Com dc NEUT

D A N G E R

Do Not Remove RTB Under Power

Unless Area is Non-Hazardous.

V out 0+

ANLG

C om

V out 1+

ANLG

C om

V out 2+

ANLG

C om

ANLG

V out 3+

C om

V out 4+

ANLG

C om

V out 5+

ANLG

C om

V out 6+

ANLG

C om

V out 7+

ANLG

C om

+24V dc dc NEUT

Ensure Adjacent Bus Lever is

Unlatched/Latched Before/After

Removing/Inserting Module

1769-OF8V

Voltage Load earth ground

External 24V dc Power +

Supply (optional)(1)

V out 0+

V out 1+

V out 2+

V out 3+

V out 4+

V out 5+

V out 6+

V out 7+

+24V dc

ANLG Com

ANLG Com dc NEUT

(1) The external power supply must be rated Class 2, with a 24V dc range of 20.4 to 26.4V dc and 120 mA minimum per output module.

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel

Configuration for the Input Modules

Chapter

1769-IF4 Input Module

Addressing

slot e

Input Image

Output Image

File slot e

Configuration

File

This chapter examines the analog input modules’ data table, channel status, and channel configuration word. The 1769-IF4 module information follows.

For 1769-IF8 module information, see page 3-16.

The 1769-IF4 memory map shows the input and configuration image tables for the 1769-IF4. Detailed information on the input image table can be found

in 1769-IF4 Input Data File on page 3-2.

Figure 3.1 1769-IF4 Memory Map

Memory Map

Channel 0 Data Word

Channel 1 Data Word

Channel 2 Data Word

Input Image

6 words

Channel 3 Data Word

General Status Bits

Over-/Under-range Bits

Word 0

Word 1

Word 2

Word 3

Word 4, bits 0 to 3

Word 5, bits 0 to 15

Configuration

File

4 words

Channel 0 Configuration Word

Channel 1 Configuration Word

Channel 2 Configuration Word

Channel 3 Configuration Word

Bit 15 Bit 0

Word 0

Word 1

Word 2

Word 3

Publication 1769-UM002B-EN-P - July 2005

3-2 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF4 Input Image

The 1769-IF4 input image file represents data words and status bits. Input words 0 through 3 hold the input data that represents the value of the analog inputs for channels 0 through 3. These data words are valid only when the channel is enabled and there are no errors. Input words 4 and 5 hold the status bits. To receive valid status information, the channel must be enabled.

TIP

You can access information in the input image file using the programming software configuration screen.

1769-IF4 Configuration File

The configuration file contains information that you use to define the way a specific channel functions. The configuration file is explained in more detail in

1769-IF4 Configuration Data File on page 3-4.

TIP

Not all controllers support program access to the configuration file. Refer to your controller’s user manual.

1769-IF4 Input Data File

Word/Bit

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

The input data table lets you access analog input module read data for use in the control program, via word and bit access. The data table structure is shown in table below.

Table 3.1 1769-IF4 Input Data Table

SGN

14 13 12 11 10 9 8 7 6 5

Analog Input Data Value Channel 0

4 3 2 1 0

SGN

Analog Input Data Value Channel 1

Analog Input Data Value Channel 2

Analog Input Data Value Channel 3

Not Used (Bits set to 0)

U0 O0 U1 O1 U2 O2 U3 O3

S3 S2 S1 S0

Set to zero

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Input Modules 3-3

1769-IF4 Input Data Values

Words 0 through 3 contain the converted analog input data from the field device. The most significant bit (MSB) is the sign bit.

General Status Bits (S0 through S3)

Word 4, bits 0 through 3 contain the general operational status bits for input channels 0 through 3. If set (1), these bits indicate an error associated with that channel. The over- and under-range bits for channels 0 through 3 are logically

ORed to the appropriate general status bit.

Over-Range Flag Bits (O0 through O3)

Over-range bits for channels 3 through 0 are contained in word 5, bits 8, 10,

12, and 14. They apply to all input types. When set (1), this bit indicates input signals beyond the normal operating range. However, the module continues to convert analog data to the maximum full range value. The bit is automatically reset (0) by the module when the over-range condition is cleared and the data value is within the normal operating range.

Under-Range Flag Bits (U0 through U3)

Under-range bits for channels 3 through 0 are contained in word 5, bits 9, 11,

13, and 15. They apply to all input types. When set (1), this bit indicates input signals below the normal operating range. It may also indicate an open circuit condition, when the module is configured for the 4 to 20 mA range. However, the module continues to convert analog data to the minimum full range value.

The bit is automatically reset (0) by the module when the under-range condition is cleared and the data value is within the normal operating range.

Publication 1769-UM002B-EN-P - July 2005

3-4 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF4 Configuration Data

File

The configuration file lets you determine how each individual input channel will operate. Parameters such as the input type and data format are set up using this file. This data file is writable and readable. The default value of the configuration data table is all zeros. The structure of the channel configuration file is shown below.

Table 3.2 1769-IF4 Configuration Data Table

(1)

Word/Bit

Word 0

Word 1

Word 2

Word 3

Enable Channel 0

Enable Channel 1

Enable Channel 2

Enable Channel 3

14 13 12

Input Data Format

Select Channel 0

Input Data Format

Select Channel 1

Input Data Format

Select Channel 2

Input Data Format

Select Channel 3

11 10 9

Input Type/Range

Select Channel 0

Input Type/Range

Select Channel 1

Input Type/Range

Select Channel 2

Input Type/Range

Select Channel 3

7 6 5

Reserved

(1)

The ability to change these values using your control program is not supported by all controllers. Refer to your controller manual for details.

3 2 1

Input Filter Select

Channel 0

Input Filter Select

Channel 1

Input Filter Select

Channel 2

Input Filter Select

Channel 3

The configuration file is typically modified using the programming software configuration screen. For information on configuring the module using

MicroLogix 1500 and RSLogix 500, see Appendix B; for CompactLogix and

RSLogix 5000, see Appendix C; for 1769-ADN DeviceNet Adapter and

Channel Configuration on page 3-5.

The configuration file can also be modified through the control program, if supported by the controller. The structure and bit settings are shown in

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Input Modules 3-5

Channel Configuration

Each channel configuration word consists of bit fields, the settings of which determine how the channel operates. See the table below and the descriptions that follow for valid configuration settings and their meanings. The default bit status of the configuration file is all zeros.

Table 3.3 Bit Definitions for Channel Configuration Words 0 through 3

Bit(s)

0 to 3

4 to 7

8 to

12 to

Reserved

Input Type/Range

Select

Define

Input Filter Select

Input Data

Format Select

Enable Channel 1

These bit settings

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Indicate this

0 0 0 0 60 Hz

0 0 0 1 50 Hz

0 0 1 0 Not Used

0 0 1 1 250 Hz

0 1 0 0 500 Hz

Not Used

(1)

Reserved

(2)

-10 to +10V dc 0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0 1 0 1

Not Used

0 to 5V dc

0 to 10V dc

4 to 20 mA

1 to 5V dc

0 to 20 mA

Not Used

Raw/Proportional Data

Engineering Units

Scaled for PID

(3)

Percent Range

Not Used

Enabled

Disabled

(1)

Any attempt to write a non-valid (not used) bit configuration into any selection field results in a module configuration error. See Configuration Errors on page 5-6.

(2)

If reserved bits are not equal to zero, a configuration error occurs.

(3)

This range is applicable to the PID function of the MicroLogix 1500 packaged controller, PLC, or SLC controllers. Logix controllers can use this or one of the other ranges for their PID functions.

Publication 1769-UM002B-EN-P - July 2005

3-6 Module Data, Status, and Channel Configuration for the Input Modules

Enable/Disable Channel

This configuration selection lets each channel to be individually enabled.

TIP

When a channel is not enabled (0), no voltage or current input is provided to the controller by the A/D converter.

Input Filter Selection

The input filter selection field lets you select the filter frequency for each channel and provides system status of the input filter setting for analog input channels 0 through 3. The filter frequency affects the noise rejection characteristics, as explained below. Select a filter frequency considering acceptable noise and step response time.

Noise Rejection

The 1769-IF4 uses a digital filter that provides noise rejection for the input signals. The filter is programmable, allowing you to select from four filter frequencies for each channel. The digital filter provides the highest noise rejection at the selected filter frequency. A lower frequency (60 Hz versus 250

Hz) can provide better noise rejection but it increases channel update time.

Transducer power supply noise, transducer circuit noise, or process variable irregularities may also be sources of normal mode noise.

Common Mode Rejection is better than 60 dB at 50 and 60 Hz, with the 50 and 60 Hz filters selected, respectively. The module performs well in the presence of common mode noise as long as the signals applied to the user plus and minus input terminals do not exceed the common mode voltage rating (±

10 V) of the module. Improper earth ground may be a source of common mode noise.

Channel Step Response

The selected channel filter frequency determines the channel’s step response.

The step response is the time required for the analog input signal to reach

100% of its expected final value. This means that if an input signal changes faster than the channel step response, a portion of that signal will be attenuated by the channel filter.

Table 3.4 Filter Frequency and Step Response

Filter Frequency

50 Hz

60 Hz

250 Hz

500 Hz

Cut-off Frequency

13.1 Hz

15.7 Hz

65.5 Hz

131 Hz

Step Response

60 ms

50 ms

12 ms

6 ms

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Input Modules 3-7

Channel Cut-Off Frequency

The -3 dB frequency is the filter cut-off frequency. The cut-off frequency is defined as the point on the frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation. All input frequency components at or below the cut-off frequency are passed by the digital filter with less than 3 dB of attenuation. All frequency components above the cut-off frequency are increasingly attenuated as shown in the graphs below.

The cut-off frequency for each channel is defined by its filter frequency selection. Choose a filter frequency so that your fastest changing signal is below that of the filter’s cut-off frequency. The cut-off frequency should not be confused with the update time. The cut-off frequency relates to how the digital filter attenuates frequency components of the input signal. The update time defines the rate at which an input channel is scanned and its channel data word is updated.

–20

–40

–60

–80

–100

–120

–140

–160

–180

–200

13.1 Hz

–3 dB

Figure 3.2 Frequency Response Graphs

50 Hz Input Filter Frequency

–20

50 100 150

Frequency (Hz)

200 250 300

60 Hz Input Filter Frequency

–3 dB

–40

–60

–80

–100

–120

–140

–160

–180

–200

15.72 Hz

60 120 180

Frequency (Hz)

240 300 360

–20

–40

–60

–80

–100

–120

–140

–160

–180

–200

65.5 Hz

250 Hz Input Filter Frequency

–3 dB

250 500 750

Frequency (Hz)

900 1150 1300

–80

–100

–120

–140

–160

–180

–20

–40

–60

–200

131 Hz

500

500 Hz Input Filter Frequency

–3 dB

1000 1500

Frequency (Hz)

2000 2500 3000

Publication 1769-UM002B-EN-P - July 2005

3-8 Module Data, Status, and Channel Configuration for the Input Modules

Module Update Time and Scanning Process

The module update time is defined as the time required for the module to sample and convert the input signals of all enabled input channels and provide the resulting data values to the processor. Module update time can be calculated by adding the sum of all enabled channel times. Channel times include channel scan time, channel switching time, and reconfiguration time.

The module sequentially samples the channels in a continuous loop.

Figure 3.3 Sequential Sampling

Channel 1 Disabled Channel 2 Disabled Channel 3 Disabled Channel 0 Disabled

Enabled

Sample

Channel 0 Enabled

Sample

Channel 1 Enabled

Sample

Channel 2 Enabled

Sample

Channel 3

Table 3.5 shows the channel update times. The fastest module update time

occurs when only one channel is enabled with a 500 Hz filter (4 ms). If more than one channel is enabled, the update time is faster if both channels have the

same configuration. See the first example on page 3-9. The slowest module

update time occurs when all four channels are enabled with different

configurations. See the second example on page 3-9.

Table 3.5 Channel Update Time

Filter Frequency

50 Hz

60 Hz

250 Hz

500 Hz

Channel Update Time

22 ms

19 ms

6 ms

4 ms

Channel Switching and Reconfiguration Times

The table below provides the channel switching and reconfiguration times for a channel.

Channel Switching

Time

Channel-to-Channel

Reconfiguration Time

Description

Table 3.6 Channel Switching and Reconfiguration Times

50 Hz

46 ms

Duration

60 Hz 250 Hz 500 Hz

39 ms 14 ms 10 ms The time it takes the module to switch from one channel to another.

The time it takes the module to change its configuration settings for a difference in configuration between one channel and another.

116 ms 96 ms 20 ms 8 ms

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Input Modules 3-9

Examples of Calculating Module Update Time

EXAMPLE

1. Two Channels Enabled with Identical Configurations

The following example calculates the 1769-IF4 module update time for two channels enabled with the same configuration and a 500 Hz filter.

Module Update Time = [Ch 0 Update Time + Ch 0 Switching Time] + [Ch 1 Update Time + Ch 1 Switching Time]

28 = [4 ms + 10 ms] + [4 ms + 10 ms]

EXAMPLE

2. Three Channels Enabled with Different Configurations

The following example calculates the module update time for three channels with the following configurations:

• Channel 0: ±10V dc with 60 Hz filter

• Channel 1: ±10V dc with 500 Hz filter

• Channel 2: 4 to 20 mA with 250 Hz filter

Module Update Time =[Ch 0 Reconfiguration Time + Ch 0 Update Time + Ch 0 Switching Time]

[Ch 1 Reconfiguration Time + Ch 1 Update Time + Ch 1 Switching Time]

[Ch 2 Reconfiguration Time + Ch 2 Scan Time + Ch 2 Switching Time]

216 =

[

96 ms + 19 ms + 39 ms

]

[

8 ms + 4 ms + 10 ms

]

[

20 ms + 6 ms + 14 ms

]

Input Type/Range Selection

This selection along with proper input wiring lets you configure each channel individually for current or voltage ranges and provides the ability to read the current range selections.

Publication 1769-UM002B-EN-P - July 2005

3-10 Module Data, Status, and Channel Configuration for the Input Modules

Input Data Selection Formats

This selection configures channels 0 through 3 to present analog data in any of the following formats:

• Raw/Proportional Data

• Engineering Units

• Scaled-for-PID

• Percent Range

Raw/Proportional Data

The value presented to the controller is proportional to the selected input and scaled into the maximum data range allowed by the bit resolution of the A/D converter and filter selected. The full range for a ±10Vdc user input is -32767

to +32767. See Table 3.7 Valid Input Data on page 3-11.

Engineering Units

The module scales the analog input data to the actual current or voltage values for the selected input range. The resolution of the engineering units is

dependent on the range selected and the filter selected. See Table 3.7 Valid

Input Data on page 3-11.

Scaled-for-PID

The value presented to the controller is a signed integer with zero representing the lower user range and 16383 representing the upper user range.

Allen-Bradley controllers, such as the MicroLogix 1500, use this range in their

PID equations. The amount over and under user range (full scale range -410 to

16793) is also included. See Table 3.7 Valid Input Data on page 3-11.

Percent Range

The input data is presented as a percentage of the user range. For example, 0V to 10V dc equals 0% to 100%.

See Table 3.7 on page 3-11.

TIP

The ±10V dc range does not support the percent user range data format.

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Input Modules 3-11

Valid Input Data Word Formats/Ranges

The following table shows the valid formats and min./max. data ranges provided by the module.

Table 3.7 Valid Input Data

1769-IF4 Input

Range

-10V to +10V dc

0V to 5V dc

Input Value

Over 10.5V dc

+10.5V dc

-10V to +10V dc

-10.5Vdc

Under -10.5V dc

Over 5.25V dc

5.25V dc 5.25V dc

0.0V dc to 5.0V dc 5.0V dc

-0.5V dc

0.0V dc

-0.5V dc

Example

Data

-10.0V dc

-10.5V dc

-11.0V dc

5.5V dc

Input

Range

Condition

+11.0V dc Over-range

+ 10.5V dc Over-range

+10.0V dc Normal

0.0V dc Normal

Normal

Under-range

Raw/Propor tional Data

Decimal

Range

Engineering

Unit

Decimal

Range

Scaled-for-

PID

Decimal

Range

32767 (max.) 10500 (max.) 16793 (max.)

31206

-31206

-32767 (min.)

10000

-10000

-10500 (min.)

16383

8192

-410 (min.)

Percent

Full Range

Decimal

Range

N/A

Under-range -32767 (min.) -10500 (min.) -410 (min.)

Over-range 32767 (max.) 5250 (max.) 17202 (max.)

N/A

10500 (max.)

Over-range

Normal

32767 (max.) 5250 (max.)

31206

Under-range -3121 (min.)

5000

-500 (min.)

17202 (max.)

16383

10500 (max.)

10000

-1638 (min.) -1000 (min.)

0V to 10V dc

4 mA to 20 mA

Under -0.5V dc

Over 10.5V dc

+10.5V dc 10.5V dc

0.0V dc to 10.0V dc 10.0V dc

-0.5V dc

Under -5.0V dc

Over 21.0 mA

21.0 mA

22.0 mA

21.0 mA

4.0 mA to 20.0 mA 20.0 mA

3.2 mA

Under 3.2 mA

-1.0V dc

11.0V dc

0.0V dc

-0.5V dc

-1.0V dc

4.0 mA

3.2 mA

0.0 mA

Under-range -3121 (min.)

Over-range 32767 (max.)

-500 (min.)

10500 (max.)

-1638 (min.)

17202 (max.)

-1000 (min.)

10500 (max.)

Over-range

Normal

32767 (max.)

31206

10500 (max.)

10000

17202 (max.)

16383

10500 (max.)

10000

Normal 0

Under-range -1560 (min.)

Over-range

Normal

-500 (min.)

-819 (min.)

-500 (min.)

32767 (max.) 21000 (max.) 17407 (max.) 10625 (max.)

31206 20000 16383 10000

Normal 6241

Under-range 4993 (min.)

4000

3200 (min.)

-819 (min.)

-500 (min.)

Publication 1769-UM002B-EN-P - July 2005

3-12 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF4 Input

Range

1.0V to 5V dc

0 mA to 20 mA

Input Value

Over 5.25V dc

+5.25V dc

1.0V to 5.0V dc

0.5V dc

Under 0.5V dc

Over 21.0 mA

21.0 mA 21.0 mA

0.0 mA to 20.0 mA 20.0 mA

Under 0.0 mA

0.0 mA

5.5V dc

5.25V dc

5.0V dc

1.0V dc

0.5V dc

0.0V dc

22.0 mA

Table 3.7 Valid Input Data

Example

Data

Input

Range

Condition

Raw/Propor tional Data

Decimal

Range

Engineering

Unit

Decimal

Range

32767 (max.) 5250 Over-range

Over-range

Normal

32767 (max.) 5250

31206 5000

Normal 6243

Under-range 3121 (min.)

1000

500

Under-range 3121 (min.)

Over-range 32767

Over-range

Normal

32767

31206

Normal 0

Under-range 0

500

21000

20000

-2048

17202

16383

Scaled-for-

PID

Decimal

Range

17407

16383

-2048

-1250

10500

10000

Percent

Full Range

Decimal

Range

10625

10000

-1250

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Input Modules 3-13

Effective Resolution

The effective resolution for an input channel depends upon the filter frequency selected for that channel. The following tables provide the effective resolution for the four frequencies for each of the range selections.

1769-IF4

Input

Range

Bits and

Engineering

Units

Resolution

Decimal

Range and

Count Value

-10 to

+10V dc

Sign +14

0.64 mV/

2 counts

0 to +5V dc Sign +13

0.64 mV/

4 counts

0 to +10V dc Sign +14

0.64 mV/

2 counts

+4 to

+20 mA

Sign +14

1.28 µA/

2 counts

+1 to +5V dc Sign +13

0.64 mV/

4 counts

0 to +20 mA Sign +14

1.28 µA/

2 counts

Raw/Proportional Data

Over the Full Input Range

±32767

Count by 2

-3121 to

+32767

Count by 4

-1560 to

+32767

Count by 2

+4993 to

+32767

Count by 2

+3121 to

+32767

Count by 4

0 to +32767

Count by 2

Table 3.8 50Hz / 60Hz Effective Resolution

Engineering Units Over the Full Input Range

Resolution Decimal

Range and

Count

Value

1.00 mV/

1 count

±10500

Count by 1

1.00 mV/

1 count

1.00 mV/

1 count

2.00 µA/

2 counts

1.00 mV/

1 count

2.00 µA/

2 counts

-500 to

+5250

Count by 1

-500 to

+10500

Count by 1

+3200 to

+2100

Count by 2

+500 to

+5250

Count by 1

0 to

+21000

Count by 2

Scaled-For-PID Over the Full Input Range

Resolution Decimal

Range and

Count

Value

1.22 mV/

1 count

-410 to

+16793

Count by 1

0.92 mV/

3 counts

1.22 mV/

2 counts

-1638 to

+17202

Count by 3

-819 to

+17202

Count by 2

1.95 µA/

2 counts

0.73 mV/

3 counts

2.44 µA/

2 counts

-819 to

+17407

Count by 2

-2048 to

+17407

Count by 3

0 to

+17202

Count by 2

Percent

Over the Full Input

Range

Resolution Decimal

Range and

Count

Value

Not

Applicable

Not

Applicable

1.00 mV/

2 counts

1.00 mV/

1 count

1.60 µA/

1 count

0.80 mV/

2 counts

2.00 µA/

1 count

-1000 to

+10500

Count by 2

-500 to

+10500

Count by 1

-500 to

+10625

Count by 1

-1250 to

+10625

Count by 2

0 to

+10500

Count by 1

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3-14 Module Data, Status, and Channel Configuration for the Input Modules

-10 to

+10V dc

0 to

+5V dc

0 to

+10V dc

+4 to

+20 mA

+1 to

+5V dc

0 to

+20 mA

1769-IF4

Input

Range

Raw/Proportional Data

Over the Full Input Range

Bits and

Engineering

Units

Resolution

Sign +11

5.13 mV/

16 counts

Sign +10

5.13 mV/

32 counts

Sign +11

5.13 mV/

16 counts

Sign +11

10.25 µA/

16 counts

Sign +10

5.13 mV/

32 counts

Sign +11

10.25 µA/

16 counts

Decimal

Range and

Count

Value

±32767

Count by 16

-3121 to

+32767

Count by 32

-1560 to

+32767

Count by 16

+4993 to

+32767

Count by 2

+3121 to

+32767

Count by 32

0 to +32767

Count by 16

Table 3.9 250Hz Effective Resolution

Engineering Units Over the Full Input Range

Resolution Decimal

Range and Count

Value

6.00 mV/

6 counts

±10500

Count by 6

6.00 mV/

6 counts

6.00 mV/

6 counts

11.00 µA/

11 counts

6.00 mV/

6 counts

11.00 µA/

11 counts

-500 to

+5250

Count by 6

-500 to

+10500

Count by 6

+3200 to

+2100

Count by 11

+500 to

+5250

Count by 6

0 to +21000

Count by 11

Scaled-For-PID Over the

Full Input Range

Resolution Decimal

Range and Count

Value

6.10 mV/

5 counts

-410 to

+16793

Count by 5

5.19 mV/

17 counts

5.49 mV/

9 counts

-1638 to

+17202

Count by 17

-819 to

+17202

Count by 9

10.74 µA/

11 counts

5.37 mV/

22 counts

10.99 µA/

9 counts

-819 to

+17407

Count by 11

-2048 to

+17407

Count by 22

0 to +17202

Count by 9

Percent

Over the Full Input

Range

Resolution Decimal

Range and

Count

Value

Not

Applicable

Not

Applicable

5.50 mV/

11 counts

6.00 mV/

6 counts

11.20 µA/

7 counts

5.20 mV/

13 counts

12.00 µA/

6 counts

-1000 to

+10500

Count by 11

-500 to

+10500

Count by 6

-500 to

+10625

Count by 7

-1250 to

+10625

Count by 13

0 to +10500

Count by 6

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Module Data, Status, and Channel Configuration for the Input Modules 3-15

1769-IF4

Input

Range

Raw/Proportional Data

Over the Full Input Range

-10 to

+10V dc

0 to

+5V dc

0 to

+10V dc

+4 to

+20 mA

+1 to

+5V dc

0 to

+20 mA

Bits and

Engineering

Units

Resolution

Sign +9

20.51 mV/

64 counts

Sign +8

20.51 mV/

128 counts

Sign +9

20.51 mV/

64 counts

Sign +9

41.02 µA/

64 counts

Sign +8

20.51 mV/

128 counts

Sign +9

41.02 µA/

64 counts

Decimal

Range and

Count

Value

±32767

Count by 64

-3121 to

+32767

Count by 128

-1560 to

+32767

Count by 64

+4993 to

+32767

Count by 64

+3121 to

+32767

Count by 128

0 to +32767

Count by 64

Table 3.10 500 Hz Effective Resolution

Engineering Units Over the Full Input Range

Resolution Decimal

Range and

Count

Value

21.00 mV/

21 counts

±10500

Count by 21

21.00 mV/

21 counts

21.00 mV/

21 counts

42.00 µA/

42 counts

21.00 mV/

21 counts

42.00 µA/

42 counts

-500 to

+5250

Count by 21

-500 to

+10500

Count by 21

+3200 to

+2100

Count by 42

+500 to

+5250

Count by 21

0 to +21000

Count by 42

Scaled-For-PID Over the

Full Input Range

Resolution Decimal

Range and

Count

Value

20.75 mV/

17 counts

-410 to

+16793

Count by 17

20.75 mV/

68 counts

20.75 mV/

34 counts

-1638 to

+17202

Count by 68

-819 to

+17202

Count by 34

41.02 µA/

42 counts

20.75 mV/

84 counts

41.51 µA/

-819 to

+17407

Count by 42

-2048 to

+17407

Count by 84

0 to +17202

Count by 34

34 counts

Percent

Over the Full Input

Range

Resolution Decimal

Range and

Count

Value

Not

Applicable

Not

Applicable

21.00 mV/

42 counts

21.00 mV/

21 counts

41.60 µA/

26 counts

20.8 mV/

52 counts

42.00 µA/

21 counts

-1000 to

+10500

Count by 42

-500 to

+10500

Count by 21

-500 to

+10625

Count by 26

-1250 to

+10625

Count by 52

0 to +10500

Count by 21

Publication 1769-UM002B-EN-P - July 2005

3-16 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF8 Input Module

Addressing

slot e

Input Image

File slot e

Output Image

File slot e

Configuration

File

The1769-IF8 memory map shows the output, input, and configuration tables for the 1769-IF8.

Figure 3.4 1769-IF8 Memory Map

Input Image

12 words

Memory Map

Channel 0 Data Word

Channel 1 Data Word

Channel 2 Data Word

Channel 3 Data Word

Channel 4 Data Word

Channel 5 Data Word

Channel 6 Data Word

Channel 7 Data Word

Time Stamp Value Word

General Status Bits

High-/Low-Alarm & Over-/Under-Range

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

Word 6

Word 7

Word 8

Word 9, bits 0-7

Word 10

Word 11

Output Image

1 word

Clear Latched Alarm Bits Word 0

Publication 1769-UM002B-EN-P - July 2005

Configuration File

50 words

Bit 15

Real Time Sample Rate

Enable Time Stamp

Channel 0 Configuration Words

Channel 1 Configuration Words

Channel 2 Configuration Words

Channel 3 Configuration Words

Channel 4 Configuration Words

Channel 5 Configuration Words

Channel 6 Configuration Words

Channel 7 Configuration Words

Bit 0

Word 0

Word 1, bit 15

Words 2-7

Words 8-13

Words 14-19

Words 20-25

Words 26-31

Words 32-37

Words 38-43

Words 44-49

Module Data, Status, and Channel Configuration for the Input Modules 3-17

1769-IF8 Input Image

The 1769-IF8 input image file represents data words and status bits. Input words 0 through 7 hold the input data that represents the value of the analog inputs for channels 0 through 7. These data words are valid only when the channel is enabled and there are no errors. Input words 9 and 11 hold the status bits. To receive valid status information, the channel must be enabled.

TIP

You can access information in the input image file using the programming software configuration screen.

1769-IF8 Output Image

The 1769-IF8 output image file contains the clear alarm control bits for the high- and low-alarm bits on each input channel. These bits are used to clear alarms when alarms are latched.

TIP

You can access information in the output image file using the programming software configuration screen.

1769-IF8 Configuration File

The configuration file contains information that you use to define the way a specific channel functions. The configuration file is explained in more detail in

1769-IF8 Configuration Data File on page 3-20.

TIP

Not all controllers support program access to the configuration file. Refer to your controller’s user manual.

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3-18 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF8 Input Data File

The input data table lets you access analog input module read data for use in the control program, via word and bit access. The data table structure is shown in the table below. For each input module, slot x, words 0-7 in the input data file contain the analog values of the inputs.

Table 3.11 1769-IF8 Input Data Table

Bit Position

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 SGN Analog Input Data Channel 0

1 SGN

2 SGN

3 SGN

4 SGN

Analog Input Data Channel 1

Analog Input Data Channel 2

Analog Input Data Channel 3

Analog Input Data Channel 4

5 SGN

6 SGN

7 SGN

8 Nu

Analog Input Data Channel 5

Analog Input Data Channel 6

Analog Input Data Channel 7

Time Stamp Value

9 Nu Nu Nu Nu Nu Nu Nu Nu S7 S6 S5 S4 S3 S2 S1 S0

10 L3 H3 U3 O3 L2 H2 U2 O2 L1 H1 U1 O1 L0 H0 U0 O0

11 L7 H7 U7 O7 L6 H6 U6 O6 L5 H5 U5 O5 L4 H4 U4 O4

1769-IF8 Input Data Values

Words 0 through 7 contain the converted analog input data from the field device. The most significant bit (MSB) is the sign bit, which is in two’s complement format. (Nu indicates not used with the bit set to 0.)

General Status Bits (S0 through S7)

Word 9, bits 0 through 7 contain the general operational status bits for input channels 0 through 7. If set (1), these bits indicate an error associated with that channel. The over- and under-range bits and the high- and low-alarm bits for channels 0 through 7 are logically ORed to the appropriate general status bit.

Low Alarm Flag Bits (L0 through L7)

Word 10, bits 3, 7, 11, and 15 and Word 11, bits 3, 7, 11, 15 contain the low alarm flag bits for input channels 0 through 7. If set (1), these bits indicate the input signal is outside the user-defined range. The module continues to convert analog data to minimum full-range values. The bit is automatically reset (0) when the low alarm condition clears, unless the channel’s alarm bits are latched. If the channel’s alarm bits are latched, a set (1) low alarm flag bit clears via the corresponding Clear Alarm Latch bit in your output data file.

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Module Data, Status, and Channel Configuration for the Input Modules 3-19

High Alarm Flag Bits (H0 through H7)

Word 10, bits 2, 6, 10, 14 and Word 11, bits 2, 6, 10, 14 contain the high alarm flag bits for input channels 0 through 7 and applies to all input types. If set (1), the input signal is output the user-defined range. The module continues to convert analog data to maximum full-range values. The bit is automatically reset (0) when the high alarm condition clears, unless the channel’s alarm bits are latched. If the channel’s alarm bits are latched, a set (1) high alarm flag bit clears via the corresponding Clear Alarm Latch bit in your output data file.

Over-Range Flag Bits (O0 through O7)

Over-range bits for channels 0 through 7 are contained in Word 10, bits 0, 4, 8,

12 and Word 11, bits 0, 4, 8, 12. They apply to all input types. When set (1), this bit indicates input signals beyond the normal operating range. However, the module continues to convert analog data to the maximum full range value.

The bit is automatically reset (0) by the module when the over-range condition is cleared and the data value is within the normal operating range.

Under-Range Flag Bits (U0 through U7)

Under-range bits for channels 0 through 7 are contained in Word 10, bits 1, 5,

9, 13 and Word 11, bits 1, 5, 9, 13. They apply to all input types. When set (1), this bit indicates input signals below the normal operating range. It may also indicate an open circuit condition, when the module is configured for the 4 to

20 mA range. However, the module continues to convert analog data to the minimum full range value. The bit is automatically reset (0) by the module when the under-range condition is cleared and the data value is within the normal operating range.

Time Stamp Value (Word 8)

The 1769-IF8 supports a 15-bit rolling timestamp that is updated during each new sampling period of the analog inputs. The timestamp has a 1 ms resolution. The timestamp value is placed in the input image file, word 8, for each module input data update (if the timestamp function is enabled). Enable and/or disable this timestamp in the configuration file.

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3-20 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF8 Output Data File

The output data table lets you access analog output module write data for use in the control program, via word and bit access. The data table structure is shown in the table below.

Table 3.12 1769-IF8 Output Data Table

(1)

Bit Position

14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

(2)

(1)

CL Lx = Cancel Low Process Alarm Latch x. This lets you individually cancel each low process alarm latch.

Cancel = 1.

(2)

CL Hx = Cancel High Process Alarm Latch x. This lets you individually cancel each high process alarm latch.

These bits are written during run mode to clear any latched low- and high-process alarms. The alarm is unlatched when the unlatch bit is set (1) and the alarm condition no longer exists. If the alarm condition persists, then the unlatch bit has no effect until the alarm condition no longer exists. You need to keep the unlatch bit set until verification from the appropriate input channel status word that the alarm status bit has cleared (0). Then you need to reset (0) the unlatch bit. The module will not latch an alarm condition if a transition from no alarm to alarm occurs while a channel’s clear latch bit is set.

1769-IF8 Configuration Data

File

ETS

Reserved

Table 3.13 1769-IF8 Configuration Data Table

13 12 11 10

Bit Position

9 8 7 6

Reserved

Real Time Sample Value

EA AL

Reserved

(1) Reserved

Inpt Dta Fm Chl0 Reserved

Process Alarm High Data Value Channel 0

Process Alarm Low Data Value Channel 0

Alarm Dead Band Value Channel 0

Reserved

EA AL

Reserved

Inpt Dta Fm Chl1 Reserved

Process Alarm High Data Value Channel 1

Process Alarm Low Data Value Channel 1

4 3 2 1 0

Input Filter Sel Chl0

Inpt Tp/RngeSel Chl0

Inpt Filter Sel Chl1

Inpt Tp/RngeSel Chl1

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Module Data, Status, and Channel Configuration for the Input Modules 3-21

Reserved

(1)

CompactLogix L43 controllers will be able to support these interrupts.

Table 3.13 1769-IF8 Configuration Data Table

Alarm Dead Band Value Channel 1

Reserved

EA AL

Reserved

Inpt Dta Fm Chl2 Reserved

Process Alarm High Data Value Channel 2

Process Alarm Low Data Value Channel 2

Alarm Dead Band Value Channel 2

Reserved

EA AL

Reserved

Inpt Dta Fm Chl3 Reserved

Process Alarm High Data Value Channel 3

Process Alarm Low Data Value Channel 3

Alarm Dead Band Value Channel 3

Reserved

EA AL

Reserved

Inpt Dta Fm Chl4 Reserved

Process Alarm High Data Value Channel 4

Process Alarm Low Data Value Channel 4

Alarm Dead Band Value Channel 4

Reserved

EA AL

Reserved

Inpt Dta Fm Chl5 Reserved

Process Alarm High Data Value Channel 5

Process Alarm Low Data Value Channel 5

Alarm Dead Band Value Channel 5

Reserved

EA AL

Reserved

Inpt Dta Fm Chl6 Reserved

Process Alarm High Data Value Channel 6

Process Alarm Low Data Value Channel 6

Alarm Dead Band Value Channel 6

Reserved

EA AL

MicroLogix 1500 and RSLogix 500, see Appendix B; for CompactLogix and

Reserved

Inpt Dta Fm Chl7 Reserved

Process Alarm High Data Value Channel 7

Process Alarm Low Data Value Channel 7

Alarm Dead Band Value Channel 7

Reserved

Input Filter Sel Chl2

Inpt Tp/RngeSel Chl2

Input Filter Sel Chl3

Inpt Tp/RngeSel Chl3

Input Filter Sel Chl4

Inpt Tp/RngeSel Chl4

Input Filter Sel Chl5

Inpt Tp/RngeSel Chl5

Input Filter Sel Chl6

Inpt Tp/RngeSel Chl6

Input Filter Sel Chl7

Inpt Tp/RngeSel Chl7

The configuration file is typically modified using the programming software configuration screen. For information on configuring the module using

RSLogix 5000, see Appendix C; for 1769-ADN DeviceNet Adapter and

Channel Configuration on page 3-22.

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3-22 Module Data, Status, and Channel Configuration for the Input Modules

The configuration file can also be modified through the control program, if supported by the controller. The structure and bit settings are shown in

Channel Configuration

Each channel’s configuration words consist of bit fields, the settings of which determine how the channel operates. See the table below and the descriptions that follow for valid configuration settings and their meanings. The default bit status of the configuration file is all zeros.

Table 3.14 Bit Definitions for Channel Configuration Words

Define

Input Filter

Selection/

-3 dB

Frequency

Enable

Interrupt

Process

Alarm

Latch

Enable

Process

Alarms

Enable

Channel

To Select

60 Hz

50 Hz

10 Hz

250 Hz

500 Hz

Enable

Disable

Enable

Disable

Enable

Disable

Enable

Disable

Make these bit settings

15 14 13 12 11 10 9 8 7-4 3 2 1 0

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

Table 3.15 Bit Definitions for Input Range and Input Data

Define Indicate this These bit settings

15-11 10 9 8 7-4

Input

Range

Select

Input

Data

Format

Select

-10 to +10V dc

0 to 5V dc

0 to 10V dc

4 to 20 mA

1 to 5V dc

0 to 20 mA

Raw/Proportional

Counts

Engineering Units

Scaled for PID

Percent Range

3 2 1 0

0 0 0 0

0 0 0 1

0 0 1 0

0 0 1 1

0 1 0 0

0 1 0 1

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Module Data, Status, and Channel Configuration for the Input Modules 3-23

Enable/Disable Channel

This configuration selection lets each channel to be individually enabled.

TIP

When a channel is not enabled (0), no voltage or current input is provided to the controller by the A/D converter.

Input Filter Selection

Noise Rejection

The 1769-IF8 uses a digital filter that provides noise rejection for the input signals. The filter is programmable, allowing you to select from four filter frequencies for each channel. The digital filter provides -3 db (50% amplitude) attenuation at the selected filter frequency. A lower frequency (60 Hz versus

250 Hz) can provide better noise rejection but it increases channel update time. Transducer power supply noise, transducer circuit noise, or process variable irregularities may also be sources of normal mode noise.

10 V) of the module. Improper earth ground may be a source of common mode noise.

Channel Step Response

The selected channel filter frequency determines the channel’s step response.

The step response is the time required for the analog input signal to reach

100% of its expected final value. This means that if an input signal changes faster than the channel step response, a portion of that signal will be attenuated by the channel filter.

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3-24 Module Data, Status, and Channel Configuration for the Input Modules

Channel Cut-Off Frequency

The cut-off frequency for each channel is defined by its filter frequency selection and is equal to the filter frequency setting. Choose a filter frequency so that your fastest changing signal is below that of the filter’s cut-off frequency. The cut-off frequency should not be confused with the update time. The cut-off frequency relates to how the digital filter attenuates frequency components of the input signal. The update time defines the rate at which an input channel is scanned and its channel data word is updated.

Module Update Time and Scanning Process

The module sequentially samples the channels in a continuous loop.

The 1769-IF8 uses two parallel sampling loops as shown in Figure 3.5 to

update the entire module (all 8 channels) in an amount of time equal to only four channel update times. The module performs parallel channel sampling on pairs of inputs. Channels 0 and 4 are a pair. The other input channel pairs are

1 and 5, 2 and 6, and 3 and 7.

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Module Data, Status, and Channel Configuration for the Input Modules 3-25

Figure 3.5 Sequential Sampling

Disable Disable

Sample

Channel 0

Sample

Channel 1

Disable

Sample

Channel 4

Disable

Enable

Sample

Channel 5

Disable

Sample

Channel 2

Disable

Sample

Channel 6

Disable

Sample

Channel 3

Disable

Sample

Channel 7

Wait

RTS

Enable

Update

Input Data

Disable

Module update time is calculated as follows:

• Slowest channel update time of pair 0 and 4 (determined by the filter setting selected for each channel and the channel update times from

Table 3.16 - channel update time for a channel that is not enabled is

equal to 0)

PLUS

• Slowest channel update time of pair 1 and 5

PLUS

• Slowest channel update time of pair 2 and 6

PLUS

• Slowest channel update time of pair 3 and 7

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3-26 Module Data, Status, and Channel Configuration for the Input Modules

If you use real-time sampling, the user-configured sample rate is used as the module update time.

Table 3.16 Filter Frequency and Update Times

Filter Frequency

10 Hz

50 Hz

60 Hz

250 Hz

500 Hz

Update Time per

Channel

100 ms

30 ms

9 ms

6 ms

Update Time per

Module

(1)

400 ms

120 ms

36 ms

24 ms

(1)

Module update time applies if you use all channel pairs and all enabled channels, and all the enabled channels use the filter frequency from the first column.

Examples of Calculating Module Update Time

EXAMPLE

1. Two Channels Enabled with Identical Filter Setting, But Not a Channel Pair

The following example calculates the 1769-IF8 module update time for two channels enabled with any configuration and a 500 Hz filter but the enabled channels are not a channel pair.

• Channel 0: ±10V dc with 500 Hz filter

• Channel 1: 0…10V dc with 500 Hz filter

Module Update Time = [Greater of Channel 0 Update Time or Channel 4 Update Time]

+ [Greater of Channel 1 Update Time or Channel 5 Update Time]

12 ms = [Greater of 6 ms or 0 ms] + [Greater of 6 ms or 0 ms]

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Module Data, Status, and Channel Configuration for the Input Modules 3-27

EXAMPLE

2. Two Channels Enabled with Different Filter Settings, But are a Channel Pair

The following example calculates the 1769-IF8 module update time for two channels enabled with any configuration, with different filter settings, but are a channel pair.

• Channel 0: ±10V dc with 60 Hz filter

• Channel 4: 0…10V dc with 500 Hz filter

Module Update Time = [Greater of Channel 0 Update Time or Channel 4 Update Time]

30 ms = [Greater of 30 ms or 6 ms]

IMPORTANT

Configuring the 1769-IF8 module to take advantage of channel pairs can result in module update times that are significantly faster than configuring the 1769-IF8 modules without such channel assignment optimization.

Input Type/Range Selection

This selection along with proper input wiring lets you configure each channel individually for current or voltage ranges and provides the ability to read the configured range selections.

Input Data Selection Formats

This selection configures channels 0 through 3 to present analog data in any of the following formats:

• Raw/Proportional Data

• Engineering Units

• Scaled-for-PID

• Percent Range

Raw/Proportional Data

to +32767. See Table 3.17 Valid Input Data on page 3-28.

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3-28 Module Data, Status, and Channel Configuration for the Input Modules

Engineering Units

The module scales the analog input data to the actual current or voltage values for the selected input range. The resolution of the engineering units is

dependent on the range selected and the filter selected. See Table 3.17 Valid

Input Data on page 3-28.

Scaled-for-PID

The value presented to the controller is a signed integer with zero representing the lower user range and 16383 representing the upper user range.

Allen-Bradley controllers, such as the MicroLogix 1500, use this range in their

PID equations. The amount over and under user range (full scale range -410 to

16793) is also included. See Table 3.17 Valid Input Data on page 3-28.

Percent Range

The input data is presented as a percentage of the user range. For example, 0V to 10V dc equals 0% to 100%.

See Table 3.17 on page 3-28.

Valid Input Data Word Formats/Ranges

The following table shows the valid formats and min./max. data ranges provided by the module.

1769-IF8

Normal

Operating

Input Range

-10V to

+10V dc

0V to 5V dc

0V to 10V dc

4 mA to

20 mA

3.2 mA to 21 mA

1.0V to 5V dc 0.5V to 5.25V

0 mA to

20 mA

Full Range

(Includes amounts

Over and Under

Normal Operating

Range)

+10.5V to -10.5V

0.0V to 5.25V

0.0V to 10.5V

0 mA to 21 mA

Table 3.17 Valid Input Data

Raw/Pro portional

Data

Engineering

Units

Full Range

-32767 to

+32767

-27068 to

+32767

-29788 to

+32767

-10500 to

+10500

0 to 5250

0 to 10500

Scaled-for-PID

Normal

Operating

Range

0 to 16383

Full Range

-410 to 16793 -100 to

+100%

0 to 17202

Percent

Normal

Operating

Range

Full Range

-105.00 to

105.00%

0 to

105.00%

-32767 to

+32767

3200 to

21000

500 to 5250

0 to 21000

-819 to

+17407

-2048 to

17407

0 to 17202

0 to 100%

-5.00 to

+106.25%

-12.50 to

+106.25%

0.00 to

105.00%

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Module Data, Status, and Channel Configuration for the Input Modules 3-29

1769-IF8 Real Time Sampling

This parameter instructs the module how often to scan its input channels and obtain all available data. After the channels are scanned, the module places the data into the Input Data file. This feature is applied on a module-wide basis.

During module configuration, you specify a Real Time Sampling (RTS) period by entering a value into Word 0 of the Configuration Data file. This value entered in Word 0 can be in the range of 0 to 5000 and indicates the sampling rate the module will use in 1 ms increments.

If you enter a 0 for the Real Time Sample Rate, the module should scan its inputs at as fast a rate as possible, controlled by the number of enabled channels and the filter setting selected for those channels.

The module compares the Real Time Sample Rate value entered in Word 0 of the Configuration Data file with a calculated module update time, again based on the number of enabled channels and the filter setting selected for those channels. If the value entered for the Real Time Sample Rate is smaller than the calculated module update time, the module indicates a configuration error.

The longest Real Time Sample Rate supported by the 1769-IF8 is 5 s, the maximum value for Word 0 of the Configuration Data file is 5000 decimal.

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3-30 Module Data, Status, and Channel Configuration for the Input Modules

1769-IF8 Process Alarms

Process alarms alert you when the module has exceeded configured high or low limits for each channel . You can latch process alarms. These are set at two user configurable alarm trigger points:

• Process Alarm High

• Process Alarm Low

Each input channel’s process alarms are controlled by bits in the

Configuration Data file. Enable alarms for a channel by setting (1) the EA bit for that channel. Set the AL bit (1) for a channel to enable the alarm latching.

Each channel’s process alarm high data value and process alarm low data value are set by entering values in the corresponding words of the Configuration

Data file for that channel.

The values entered for a channel’s process alarm data values must be within the normal operating data range as set by the input Data Format selected for that channel. If a process alarm data value is entered that is outside the normal operating data range set for a channel, the module indicates a configuration error.

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Module Data, Status, and Channel Configuration for the Input Modules 3-31

Alarm Deadband

You may configure an Alarm Deadband to work with the process alarms.

The deadband lets the process alarm status bit to remain set, despite the alarm condition disappearing, as long as the input data remains within the deadband of the process alarm.

Figure 3.6 shows input data that sets each of the two alarms at some point

during module operation. In this example, Latching is disabled; therefore, each alarms turns OFF when the condition that caused it to set ceases to exist.

Figure 3.6 Alarm Deadbands

High

High alarm turns ON

Low

High alarm turns OFF

Low alarms turns ON

Normal input range

Low alarms turns OFF

Alarm deadbands

43153

The value entered for a channel’s alarm deadband value must be within the normal operating data range as set by the Input Data Format selected for that channel. If an alarm deadband value is entered that is outside the normal operating data range set for a channel, the module indicates a configuration error.

The module also checks for an alarm deadband value that is less than 0 or large enough to exceed one or both of the channel’s full range limits. When one of these conditions occurs, the module changes the alarm deadband value that is in violation to one that is allowed. A deadband value less than 0 is set at 0. A deadband value that when added to the process alarm low data value or subtracted from the process alarm high data value results in a value that exceeds the full range limits of the channel is adjusted to the first, smaller value that eliminates this full range violation.

Publication 1769-UM002B-EN-P - July 2005

3-32 Module Data, Status, and Channel Configuration for the Input Modules

Notes:

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel

Configuration for the Output Modules

Chapter

This chapter examines the analog output module’s output data file, input data file, channel status, and channel configuration words.

1769-OF2 Output Module

Memory Map

slot e

Input Image

File

The 1769-OF2 memory map shows the output, input, and configuration tables for the 1769-OF2.

Figure 4.1 1769-OF2 Memory Map

Memory Map

Input Image

Diagnostic and Status Bits

Over- and Under-range Bits

Channel 0 Output Data Echo

(1)

Channel 1 Output Data Echo

(1)

Word 0, bits 0-1, 12-15

Word 1, bits 12-15

Word 2

Word 3

Output Image Channel 0 Data Word

Channel 1 Data Word

Word 0

Word 1 slot e

Output Image

File slot e

Configuration

File

(1) See page 21.

Configuration File

6 words

Channel 0 Configuration Word

Channel 1 Configuration Word

Channel 0 Fault Value Word

Channel 0 Program Idle Mode Word

Bit 15

Channel 1 Fault Value Word

Channel 1 Program Idle Mode Word

Bit 0

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

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4-2 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF2 Output Data File

The structure of the output data file is shown in the table below. Words 0 and

1 contain the converted analog output data for channels 0 and 1, respectively.

The most significant bit is the sign bit.

Table 4.1 1769-OF2 Output Data Table

Word/Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

Word 0 SGN

Word 1 SGN

Analog Output Data Channel 0

Analog Output Data Channel 1

1769-OF2 Input Data File

This data table file provides immediate access to channel diagnostic information and analog output data at the module for use in the control program. To receive valid data, you must enable the channel. The data table structure is described below.

Table 4.2 1769-OF2 Input Data Table

Word/Bi t

Word 0

15 14 13 12 11 10 9 8 7 6 5 4

D0 H0 D1 H1 Not Used (bits set to 0)

Word 1 U0 O0 U1 O1

Word 2 SGN

Bits 0 - 11 set to 0

Channel 0 - Output Data Loopback/Echo

Word 3 SGN Channel 1 - Output Data Loopback/Echo

3 2 1

1769-OF2 Diagnostic Bits (D0 and D1)

When set (1), these bits indicate a broken output wire or high load resistance

(not used on voltage outputs). Bit 15 represents channel 0; bit 13 represents channel 1.

1769-OF2 Hold Last State Bits (H0 and H1)

These bits indicate when channel 0 (bit 14) or channel 1 (bit 12) is in a hold last state condition. When one of these bits is set (1), the corresponding channel is in the hold state. Output data will not change until the condition which caused the hold last state to occur is removed. The bit is reset (0) for all other conditions.

TIP

MicroLogix 1500 controllers do not support the hold last state function. Refer to your controller’s user manual for details.

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Module Data, Status, and Channel Configuration for the Output Modules 4-3

1769-OF2 Over-Range Flag Bits (O0 and O1)

Over-range bits for channels 0 and 1 are contained in word 1, bits 14 and 12.

When set, the over-range bit indicates that the controller is attempting to drive the analog output above its normal operating range. However, the module continues to convert analog output data to a maximum full range value. The bit is automatically reset (0) by the module when the over-range condition is cleared (the output is within the normal operating range). The over-range bits

apply to all output ranges. Refer to Table 4.5 1769-OF2 Valid Output Data

Table on page 4-12 to view the normal operating and over-range areas.

1769-OF2 Under-Range Flag Bits (U0 and U1)

Under-range bits for channels 0 and 1 are contained in word 1, bits 15 and 13.

When set (1), the under-range bit indicates that the controller is attempting to drive the analog output below its normal operating range. However, the module continues to convert analog output data to a minimum full range value. The bit is automatically reset (0) by the module when the under-range condition is cleared (the output is within the normal operating range). The

under-range bits apply to all output ranges. Refer to Table 4.5 1769-OF2 Valid

Output Data Table on page 4-12 to view the normal operating and

under-range areas.

1769-OF2 General Status Bits (S0 and S1)

Word 0, bits 0 and 1 contain the general status information for output channels 0 and 1. If set (1), these bits indicate an error associated with that channel. The over-range and under-range bits and the diagnostic bit are logically ORed to this position.

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4-4 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF2 Output Data Loopback/Echo

Words 2 and 3 provide output loopback/data echo through the input array for channels 0 and 1, respectively. The value of the data echo is the analog value currently being converted on-board the module by the D/A converter. This ensures that the logic-directed state of the output is true. Otherwise, the state of the output could vary depending on controller mode.

Under normal operating conditions, the data echo value is the same value that is being sent from the controller to the output module. Under abnormal conditions, the values may differ. For example:

During run mode, the control program could direct the module to a value over or under the defined full range. In that case, the module raises the over- or under-range flag and continues to convert and data echo up to the defined full range. However, upon reaching either the maximum upper or lower full range value, the module stops converting and echoes back that maximum upper or lower full range value, not the value being sent from the controller.

During program or fault mode with Hold Last State or User-Defined

Value selected, the module echoes the hold last value or alternate value you selected. For more information on the hold last and user-defined

values, see 1769-OF2 Fault Value (Channel 0 and 1) on page 4-11 and

1769-OF2 Program/Idle Value (Channel 0 and 1) on page 4-11.

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Output Modules 4-5

1769-OF2 Configuration

Data File

The configuration file lets you determine how each individual output channel will operate. Parameters such as the output type/range and data format are set up using this file. The configuration data file is writable and readable. The default value for the configuration data file is all zeros. The structure of the channel configuration file is explained below. Words 0 and 1 are the channel

configuration words for channels 0 and 1. They are described in 1769-OF2

Channel Configuration on page 4-6. Words 2 through 5 are explained

beginning on page 4-11.

Table 4.3 1769-OF2 Configuration Data Table

(1)

Word/Bit 15 14

Word 0 E

13 12

Output Data Format

Select Channel 0

11 10 9 8

Output Type/Range

Select Channel 0

Word 1

Word 2

E Output Data Format

Select Channel 1

7 6 5

Not Used

(set to 0)

Output Type/Range

Select Channel 1

Not Used

(set to 0)

Fault Value - Channel 0

Word 3

Word 4

Word 5

Program (Idle) Value - Channel 0

Fault Value - Channel 1

Program (Idle) Value - Channel 1

3 2

FM0 PM0

FM1 PM1

(1)

The ability to change these values using your control program is not supported by all controllers. Refer to your controller manual for details.

Not Used

(set to 0)

Not Used

(set to 0)

PFE0

PFE1

The configuration file is typically modified using the programming software configuration screen. For information on configuring the module using

MicroLogix 1500 and RSLogix 500, see Appendix B; for CompactLogix and

RSLogix 5000, see Appendix C; for 1769-ADN DeviceNet Adapter and

1769-OF2 Channel Configuration on page 4-6.

The configuration file can also be modified through the control program, if supported by the controller. The structure and bit settings are shown in

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4-6 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF2 Channel Configuration

Both channel configuration words (0 and 1) consist of bit fields, the settings of which determine how the corresponding channel operates. See the table below and the descriptions that follow for valid configuration settings and their meanings.

Table 4.4 1769-OF2 Bit Definitions for Channel Configuration Words 0 and 1

Bit(s)

4-7

8-11

12-14

Reserved

Program/Idle

Mode

Define

Program/Idle to

Fault Enable

Fault Mode

Reserved

Output

Type/Range Select

Output Data

Format Select

Enable Channel 1

These bit settings Indicate this

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 Program Mode Data

Applied

1 Fault Mode Data Applied

0 1 0 1

Not Used

Reserved

Program Mode Hold Last

State

Program Mode

User-Defined Value

Fault Mode Hold Last

State

Fault Mode User-Defined

Value

Reserved

(1)

-10V dc to +10V dc

0 to 5V dc

0 to 10V dc

4 to 20 mA

1 to 5V dc

0 0 0

0 0 1

0 1 0

0 1 1

0 to 20 mA

Not Used

(2)

Raw/Proportional Data

Engineering Units

Scaled-for-PID

(3)

Percent Range

Not Used

Any attempt to write a non-valid (not used) bit configuration into any selection field results in a module configuration error. See Configuration Errors on page 5-6.

Enabled

Disabled

(1)

If reserved bits are not equal to zero, a configuration error occurs.

(2)

(3)

This range is applicable to the PID function of the MicroLogix 1500 packaged controller, PLC, or SLC controllers. Logix controllers can use this or one of the other ranges for their PID functions.

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Module Data, Status, and Channel Configuration for the Output Modules 4-7

1769-OF2 Enable/Disable Channel

This configuration selection (bit 15) lets each channel to be individually enabled.

TIP

A channel that is not enabled has zero voltage or current at its terminal.

1769-OF2 Output Data Format Selection

This selection configures each channel to interpret data presented to it by the controller in any of the following formats:

• Raw/Proportional Data

• Engineering Units

• Scaled-for-PID

• Percent Full Range

1769-OF2 Raw/Proportional Data

The control program presents the maximum raw data value allowed by the bit resolution of the D/A converter. The full range for a ±10V dc user input is

-32767 to +32767. See Table 4.5 1769-OF2 Valid Output Data Table on page 4-12.

1769-OF2 Engineering Units

The control program presents an engineering data value to the module within the current or voltage range allowed by the D/A converter. The module then scales the data to the appropriate analog output value for the selected user

range. See Table 4.5 1769-OF2 Valid Output Data Table on page 4-12.

1769-OF2 Scaled-for-PID

The control program presents an integer value to the module, with zero representing the lower user range and 16383 representing the upper user range, for conversion by the D/A converter. The module then scales this data to the

approximate analog output value for the selected user range. See Table 4.5

1769-OF2 Valid Output Data Table on page 4-12.

TIP

Allen-Bradley controllers, such as the MicroLogix 1500, use this range in their PID equations for controlled process outputs.

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4-8 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF2 Percent Full Range

The control program presents the analog output data to the module as a percent of the full analog output range (for example, valve 50% open). The module scales this data to the appropriate analog output value for the selected

user range. For example, 0 to 100% equals 0 to 10V dc. See Table 4.5

1769-OF2 Valid Output Data Table on page 4-12.

TIP

The ±10V dc range does not support percent full range.

1769-OF2 Output Type/Range Selection

This selection, along with proper output wiring, lets you configure each output channel individually for current or voltage ranges, and provides the ability to read the range selection.

1769-OF2 Fault Mode (FM0 and FM1)

This configuration selection provides individual fault mode selection for analog output channels 0 (word 0, bit 3) and 1 (word 1, bit 3). When this selection is disabled [the bit is reset (0)] and the system enters the fault mode, the module holds the last output state value. This means that the analog output remains at the last converted value prior to the condition that caused the system to enter the fault mode.

IMPORTANT

Hold last state is the default condition for the 1769-OF2 during a control system run-to-fault mode change.

TIP

MicroLogix 1500™ does not support the analog output module’s default hold last state function and resets analog outputs to zero when the system enters the fault mode.

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Module Data, Status, and Channel Configuration for the Output Modules 4-9

If this selection is enabled [the bit is set (1)] and the system enters the fault mode, it commands the module to convert the user-specified integer value from the channel’s fault value word (2 or 4) to the appropriate analog output for the range selected. If the default value, 0000, is entered, the output typically converts to the minimum value for the range selected.

EXAMPLE

• If the raw/proportional or engineering units data format is selected and zero (0000) is entered in the

±10V dc operating range, the resulting value would be

0V dc.

• If the raw/proportional or engineering units format is selected and zero is entered as the fault value in either a

1 to 5V dc or 4 to 20 mA range, a configuration error results.

•

See Table 4.5 1769-OF2 Valid Output Data Table on page 4-12 for more examples.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

1769-OF2 Program/Idle Mode (PM0 and PM1)

This configuration selection provides individual program/idle mode selection for the analog channels 0 (word 0, bit 2) and 1 (word 1, bit 2). When this selection is disabled [the bit is reset (0)], the module holds the last state , meaning that the analog output remains at the last converted value prior to the condition that caused the control system to enter the program mode.

IMPORTANT

Hold last state is the default condition for the 1769-OF2 during a control system run-to-program mode change.

TIP

MicroLogix 1500™ does not support the analog output module’s default hold last state function and resets analog outputs to zero when the system enters the program mode.

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4-10 Module Data, Status, and Channel Configuration for the Output Modules

If this selection is enabled [the bit is set (1)] and the system enters the program mode, it commands the module to convert the user-specified value from the channel’s program/idle value word (3 or 5) to the appropriate analog output for the range selected.

EXAMPLE

• If the default value, 0000, is used and the range selected is 0 to 20 mA, the module will output 0 mA for all data formats.

• If the raw/proportional or engineering units format is selected and zero is entered as the program/idle value in either a 1 to 5V dc or 4 to 20 mA range, a configuration error results.

•

See Table 4.5 1769-OF2 Valid Output Data Table on page 4-12 for more examples.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

1769-OF2 Program/Idle to Fault Enable (PFE0 and PFE1)

If a system currently in program/idle mode faults, this setting (word 0, bit 0; word 1, bit 0) determines whether the program/idle or fault mode value is applied to the output. If the selection is enabled [the bit is set (1)], the module applies the fault mode data value. If the selection is disabled [the bit is reset

(0)], the module applies the program/idle mode data value. The default setting is disabled.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

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Module Data, Status, and Channel Configuration for the Output Modules 4-11

1769-OF2 Fault Value (Channel 0 and 1)

Using words 2 and 4 for channels 0 and 1, you can specify the values the outputs will assume when the system enters the fault mode. The default value is 0. Valid values are dependent upon the range selected in the range selection field. If the value you entered is outside the normal operating range for the output range selected, the module generates a configuration error.

For example, if you select engineering units for the ±10V dc range and enter a fault value within the normal operating range (0 to 10000), the module will configure and operate correctly. However, if you enter a value outside the normal operating range (for example 11000), the module indicates a configuration error.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

1769-OF2 Program/Idle Value (Channel 0 and 1)

Use words 3 and 5 to set the integer values for the outputs to assume when the system enters the program mode. The values are dependent upon the range selected in the range selection field. If the value you entered is outside the normal operating range for the output range selected, the module generates a configuration error. The default value is 0.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

Publication 1769-UM002B-EN-P - July 2005

4-12 Module Data, Status, and Channel Configuration for the Output Modules

OF2

Output

Range

Input

Value

Example Data

1769-OF2 Valid Output Data Word Formats/Ranges

The following table shows the valid formats and data ranges accepted by the module.

Table 4.5 1769-OF2 Valid Output Data Table

Output

Range

State

Raw/Proportio nal Data

Engineering

Unit

Scaled-for-PID Percent Full

Range

Decimal Range Decimal Range Decimal

Range

Decimal

Range

±10V dc

0V to

5V dc

Over

10.5V dc

+10.5V dc

-10V to

+10V dc

+11.0V dc

+10.5V dc

+10.0V dc

0.0V dc

-10.0V dc

-10.5V dc -10.5V dc

+10.5V dc

Over

N/A

32767

N/A

32767

11000

10500

17202

16793

N/A

+10.0V dc

Normal 31207

0.0V dc Normal 0

31207

10000

16383

8192

16383

8192

N/A

Normal -31207 -31207 -10000 -10000 0 0 N/A -10.0V dc

-10.5V dc

Under -32767 -32767 -10500 -10500 -410 -410 N/A

N/A

Under

-10.5V dc

Over

5.25V dc

-11.0V dc

5.5V dc

-11.0V dc

+5.25V dc

Under

Over

N/A

-11000

5500

5.25V dc 5.25V dc +5.25V dc

Over 32767 32767 5250

0.0V dc to

5.0V dc

0.0V dc

+5.0V dc

0.0V dc

Normal

31207

5000

-0.5V dc -0.5V dc -0.5V dc Under -3121 -3121 -500

Under

-0.5V dc

-1.0V dc -0.5V dc Under -6241 -3121 -500

-10500

5250

5000

-500

-819

18021

17202

16383

-1638

-3277

-410

17202

16383

-1638

N/A

11000

10500

10000

-1000

-2000

N/A

10500

10000

-1000

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Module Data, Status, and Channel Configuration for the Output Modules 4-13

OF2

Output

Range

Input

Value

Example Data

Table 4.5 1769-OF2 Valid Output Data Table

Output

Range

State

Raw/Proportio nal Data

Engineering

Unit

Scaled-for-PID Percent Full

Range

Decimal Range Decimal Range Decimal

Range

Decimal

Range

0V to

10V dc

4 mA to

20 mA

1.0V to

5V dc

Over

10.5V dc

11.0V dc +10.5V dc

+10.5V dc +10.5V dc +10.5V dc

0.0V dc to

10.0V dc

-0.5V dc

Under

-5.0V dc

Over

21.0 mA

4.0 mA to

20.0 mA

+10.0V dc +10.0V dc

0.0V dc 0.0V dc

Normal 31207

Normal 0

-0.5V dc -0.5V dc Under

-1.0V dc -0.5V dc Under

-1560

-3121

31207

-1560

10000

-500

-1000

10000

-500

16383

-819

-1638

16383

-819

10000

-500

-1000

10000

-500

+22.0 mA

+21.0 mA

+20.0 mA +20.0 mA

Over

Normal

N/A

32767

N/A

32767

31207

N/A

32767

N/A

32767

31207

11000

10500

22000

21000

20000

10500

21000

20000

18021

17202

18431

17407

16383

17202

17407

16383

11000

10500

11250

10625

10000

10500

10625

10000

4000

3200

-819

-4096 -819

-500

-2500 -500

3.2 mA

Under 3.2 mA

1.0V to

5.0V dc

0.5V dc

Under

0.5V dc

+4.0 mA +4.0 mA Normal 6241

+3.2 mA

0.0 mA

Over

5.25V dc

+5.5V dc +5.25V dc

+5.25V dc +5.25V dc +5.25V dc

+5.0V dc

+3.2 mA

+5.0V dc

Under

Over

Normal

4993

N/A

32767

31207

+1.0V dc +1.0V dc Normal 6241

+0.5V dc +0.5V dc Under

0.0V dc 0.0V dc Under

3121

6241

4993

N/A

32767

31207

6241

3121

4000

3200

5500

5250

5000

1000

500

5250

5000

1000

500

18431

17407

16383

17407

16383

11250

10625

10000

10625

10000

-2048 -2048 -1250 -1250

-4096 -2048 -2500 -1250

Publication 1769-UM002B-EN-P - July 2005

4-14 Module Data, Status, and Channel Configuration for the Output Modules

OF2

Output

Range

Input

Value

Example Data

Table 4.5 1769-OF2 Valid Output Data Table

Output

Range

State

Raw/Proportio nal Data

Engineering

Unit

Scaled-for-PID Percent Full

Range

Decimal Range Decimal Range Decimal

Range

Decimal

Range

0 mA to

20 mA

Over

21.0 mA

0.0 mA to

20.0 mA

Under 0.0 mA

+22.0 mA +21.0 mA

21.0 mA +21.0 mA

20.0 mA +20.0 mA

0.0 mA

-1.0 mA

0.0 mA

Over

N/A N/A 22000 21000 18201 17202 11000 10500

32767 32767 21000 21000 17202 17202 10500 10500

Normal 31207 31207 20000 20000 16383 16383 10000 10000

Normal 0

Under -1560

-1000

-819

-500

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Output Modules 4-15

1769-OF2 Module

Resolution

The resolution of an analog output channel depends on the output type/range

and data format selected. Table 4.6 provides detailed resolution information

for the 1769-OF2.

1769-OF

2 Output

Range

-10 to

+10V dc

0 to

+5V dc

0 to

+10V dc

+4 to

+20 mA

+1 to

+5V dc

0 to

+20 mA

Raw/Proportional Data

Over the Full Input Range

Bits and

Engineering

Units

Resolution

Decimal

Range and Count

Value

±32767

Count by 2

Sign +14

0.64 mV/

2 counts

Sign +13

0.64 mV/

4 counts

Sign +14

0.64 mV/

2 counts

Sign +14

1.28 µA/

2 counts

-3121 to

+32767

Count by 4

-1560 to

+32767

Count by 2

+4993 to

+32767

Count by 2

Sign +13

0.64 mV/

4 counts

Sign +14

1.28 µA/

2 counts

+3121 to

+32767

Count by 4

0 to

+32767

Count by 2

Table 4.6 1769-OF2 Output Resolution

Engineering Units Over the Full Input Range

Resolution Decimal

Range and Count

Value

2.00 mV/

2 counts

±10500

Count by 2

2.00 mV/

2 counts

2.00 mV/

2 counts

2.00 µA/

2 counts

2.00 mV/

2 counts

2.00 µA/

2 counts

-500 to

+5250

Count by 2

-500 to

+10500

Count by 2

+3200 to

+2100

Count by 2

+500 to

+5250

Count by 2

0 to

+21000

Count by 2

Scaled-For-PID Over the

Full Input Range

Resolution Decimal

2.44 mV/

2 counts

0.92 mV/

3 counts

1.22 mV/

2 counts

1.95 µA/

2 counts

0.73 mV/

3counts

2.44 µA/

2 counts

Range and Count

Value

-410 to

+16793

Count by 2

-1638 to

+17202

Count by 3

-819 to

+17202

Count by 2

-819 to

+17407

Count by 2

-2048 to

+17407

Count by 3

0 to

+17202

Count by 2

Percent

Over the Full Input Range

Resolution Decimal

Range and

Count

Value

Not

Applicable

Not

Applicable

1.00 mV/

2 counts

2.00 mV/

2 counts

3.20 µA/

2 counts

0.80 mV/

2 counts

4.00 µA/

2 counts

-1000 to

+10500

Count by 2

-500 to

+10500

Count by 2

-500 to

+10625

Count by 2

-1250 to

+10625

Count by 2

0 to +10500

Count by 2

Publication 1769-UM002B-EN-P - July 2005

4-16 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C Output Module

Memory Map

slot e

Input Image

File slot e

Output Image

File slot e

Configuration

File

The 1769-OF8C memory map shows the output, input, and configuration tables for the 1769-OF8C.

Figure 4.2 1769-OF8C Memory Map

Memory Map

General Status Bits

Open-circuit, Output-held, Over-/Under-range

Input Image

11 words

Word 0, bits 0-8

Word 1

Open-circuit, Output-held, Over-/Under-range Word 2

Channel 0 Data Word

Channel 1 Data Word

Word 3

Word 4

Channel 2 Data Word

Channel 3 Data Word

Word 5

Word 6

Channel 4 Data Word

Channel 5 Data Word

Channel 6 Data Word

Channel 7 Data Word

Word 7

Word 8

Word 9

Word 10

Output Image

9 words

Channel 0 Data Word

Channel 1 Data Word

Channel 2 Data Word

Channel 3 Data Word

Channel 4 Data Word

Channel 5 Data Word

Channel 6 Data Word

Channel 7 Data Word

Unlatch Over- and Under-range Bits

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

Word 6

Word 7

Word 8

Configuration File

64 words

Bit 15

Channel 0 Configuration Word

Channel 1 Configuration Word

Channel 2 Configuration Word

Channel 3 Configuration Word

Channel 4 Configuration Word

Channel 5 Configuration Word

Channel 6 Configuration Word

Channel 7 Configuration Word

Bit 0

Words 0-7

Words 8-15

Words 16-23

Words 24-31

Words 32-39

Words 40-47

Words 48-55

Words 56-63

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Module Data, Status, and Channel Configuration for the Output Modules 4-17

1769-OF8V Output Module

Memory Map

slot e

Input Image

File slot e

Output Image

File slot e

Configuration

File

The 1769-OF8V memory map shows the output, input, and configuration tables for the 1769-OF8V.

Figure 4.3 1769-OF8V Memory Map

Memory Map

General Status Bits

Open-circuit, Output-held, Over-/Under-range

Input Image

11 words

Word 0, bits 0-8

Word 1

Open-circuit, Output-held, Over-/Under-range Word 2

Channel 0 Data Word

Channel 1 Data Word

Word 3

Word 4

Channel 2 Data Word

Channel 3 Data Word

Word 5

Word 6

Channel 4 Data Word

Channel 5 Data Word

Channel 6 Data Word

Channel 7 Data Word

Word 7

Word 8

Word 9

Word 10

Output Image

9 words

Channel 0 Data Word

Channel 1 Data Word

Channel 2 Data Word

Channel 3 Data Word

Channel 4 Data Word

Channel 5 Data Word

Channel 6 Data Word

Channel 7 Data Word

Unlatch Over- and Under-range Bits

Word 0

Word 1

Word 2

Word 3

Word 4

Word 5

Word 6

Word 7

Word 8

Configuration File

64 words

Bit 15

Channel 0 Configuration Word

Channel 1 Configuration Word

Channel 2 Configuration Word

Channel 3 Configuration Word

Channel 4 Configuration Word

Channel 5 Configuration Word

Channel 6 Configuration Word

Channel 7 Configuration Word

Bit 0

Words 0-7

Words 8-15

Words 16-23

Words 24-31

Words 32-39

Words 40-47

Words 48-55

Words 56-63

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4-18 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C and -OF8V

Output Data File

The structure of the output data file is shown in the table below. Words 0 through 7 contain the commanded analog output data for channels 0 through

7, respectively. The most significant bit is the sign bit. Word 8 contains the control bits for unlatching alarms.

Table 4.7 1769-OF8C and -OF8V Output Data Table

Bit Position

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 SGN

1 SGN

Analog Output Data Channel 0

Analog Output Data Channel 1

2 SGN

3 SGN

4 SGN

5 SGN

Analog Output Data Channel 2

Analog Output Data Channel 3

Analog Output Data Channel 4

Analog Output Data Channel 5

6 SGN

7 SGN

Analog Output Data Channel 6

Analog Output Data Channel 7

8 UU7 UO7 UU6 UO6 UU5 UO5 UU4 UO4 UU3 UO3 UU2 UO2 UU1 UO1 UU0 UO0

Channel Alarm Unlatch

These bits are written during run mode to clear any latched low- and high-clamps and under- and over-range alarms. The alarm is unlatched when the unlatch bit is set (1) and the alarm condition no longer exists. If the alarm condition persists, then the unlatch bit has no effect. You need to keep the unlatch bit set until verification from the appropriate input channel status word says that the alarm status bit has cleared (0). Then you need to reset (0) the unlatch bit. The module will not latch an alarm condition when a transition from a no alarm condition to an alarm condition occurs while a channel’s clear latch bit is set.

Table 4.8 Channel Alarm Unlatch

Bit Position

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 UU7 (1)

UO7

(2) UU6 UO6 UU5 UO5 UU4 UO4 UU3 UO3 UU2 UO2 UU1 UO1 UU0 UO0

(1)

Unlatch channel x under-range or low-clamp exceeded alarm.

(2)

Unlatch channel x over-range or high-clamp exceeded alarm.

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1769-OF8C and -OF8V

Input Data File

Module Data, Status, and Channel Configuration for the Output Modules 4-19

Table 4.9 1769-OF8C and -OF8V Input Data Table

Bit Position

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 PF S7 S6 S5 S4 S3 S2 S1 S0

1 D3 H3 U3 O3 D2 H2 U2 O2 D1 H1 U1 O1 D0 H0 U0 O0

2 D7 H7 U7 O7 D6 H6 U6 O6 D5 H5 U5 O5 D4 H4 U4 O4

3 Channel 0 Data Value

Channel 1 Data Value

Channel 2 Data Value

Channel 3 Data Value

Channel 4 Data Value

Channel 5 Data Value

Channel 6 Data Value

Channel 7 Data Value

1769-OF8C and -OF8V Data Values

Words 3 through 10 contain the data echo of the analog data presently commanded by the module for each output.

1769-OF8C and -OF8V Power Fail Bit (PF)

Word 0, bit 8, contains the analog power fail information for the output channels (which is isolated from the system backplane power). If set (1), this bit indicates that the analog power on the isolated output channel has failed. If external user power is selected for the module, the external power supply may be wired incorrectly or not supplying power. If internal (backplane) power is desired, be sure the selector switch on the module is in the internal power position.

1769-OF8C and -OF8V General Status Bits (S0 through S7)

Word 0, bits 0 through 7 contain the general status information for output channels 0 through 7. If set (1), these bits indicate an error associated with that channel. The over-range and under-range bits and the diagnostic bit are logically ORed to this position.

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4-20 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C and -OF8V Over-Range Flag Bits (O0 through O7)

Word 1, bits 0, 4, 8, and 12, and Word 2, bits 0, 4, 8, and 12 contain the over-range bits for channels 0 through 7. When set, the over-range bit indicates that the controller is attempting to drive the analog output above its normal operating range or above the channel’s High Clamp level (if clamp limits are set for the channel). However, the module continues to convert analog output data to a maximum full range value if clamp levels are not set for the channel.

If alarm latching is not enabled for the channel, the bit is automatically reset

(0) by the module when the over-range condition is cleared or the commanded value no longer exceeds the high clamp (the output is commanded to return to within the normal allowed range). The over-range bits apply to all output

ranges. Refer to Table 4.17 1769-OF8C Valid Output Data Table on page 4-33

and Table 4.18 1769-OF8V Valid Output Data Table on page 4-34 to view the

normal operating and over-range areas.

1769-OF8C and -OF8V Under-Range Flag Bits (U0 through U7)

Word 1, bits 1, 5, 9, and 13, and Word 2, bits 1, 5, 9, and 13 contain the under-range bits for channels 0 through 7. When set (1), the under-range bit indicates that the controller is attempting to drive the analog output below its normal operating range or below the channel’s Low Clamp level (if clamp limits are set for the channel). However, the module continues to convert analog output data to a minimum full range value if clamp levels are not set for the channel.

If alarm latching is not enabled for the channel, the bit is automatically reset

(0) by the module when the under-range condition is cleared or the commanded value no longer exceeds the low clamp (the output is commanded to return to within the normal allowed range). The under-range bits apply to all

output ranges. Refer to Table 4.17 1769-OF8C Valid Output Data Table on

page 4-33 and Table 4.18 1769-OF8V Valid Output Data Table on page 4-34

to view the normal operating and under-range areas.

1769-OF8C and -OF8V Diagnostic Bits (D0 through D7)

Word 1, bits 3, 7, 11, and 15, and Word 2, bits 3, 7, 11, and 15 contain the open-circuit diagnostic bits for input channels 0 through 7. When set (1), these bits indicate a broken output wire or high load resistance. These bits are always cleared (0) for the 1769-OF8V module since open-circuit diagnostics do not apply for analog voltage outputs.

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Module Data, Status, and Channel Configuration for the Output Modules 4-21

1769-OF8C and -OF8V Output Held Bits (H0 through H7)

Word 1, bits 2, 6, 10, and 14, and Word 2, bits 2, 6, 10, and 14 contain the output held bits for input channels 0 through 7. When one of these bits is set

(1), the corresponding channel is in the hold state. Output data will not change until value commanded by the controller matches the value being held by the module for any held output channel.

When the value commanded for a channel by the controller matches the value being held by the module, the Output Held bit for that channel is cleared (0).

The output channel can again be directly controlled by the values commanded in the Output Data file by the controller. The control can determine the output value being held by the module for any channel whose Output Held bit is set (1) by reading words 3 to 10 of the Input Data file.

1769-OF8C and -OF8V Output Data Loopback/Echo

Words 3 through 10 provide output loopback/data echo through the input array for channels 0 through 7. The value of the data echo is the analog value currently being converted on-board the module by the D/A converter. This ensures that the logic-directed state of the output is true. Otherwise, the state of the output could vary depending on controller mode.

Under normal operating conditions, the data echo value is the same value that is being sent from the controller to the output module. Under abnormal conditions, the values may differ. For example:

During program or fault mode with Hold Last State or User-Defined

Value selected, the module echoes the hold last value or alternate value you selected. For more information on the hold last and user-defined

values, see 1769-OF8C and -OF8V Fault Value on page 4-31 and

1769-OF8C and -OF8V Program/Idle Value on page 4-32.

When one or more of the output channel’s Output Held bits are set (1).

See 1769-OF8C and -OF8V Output Held Bits (H0 through H7) on page 4-21.

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4-22 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C and -OF8V

Configuration Data File

words, the first two words of each eight word group, are described in Table

4.10 1769-OF8C and -OF8V Configuration Data File on page 4-22.

Table 4.10 1769-OF8C and -OF8V Configuration Data File

Word Description

0 Channel 0 Configuration Word 0

Channel 0 Configuration Word 1

Channel 0 Fault Value Word

Channel 0 Program Idle Mode Word

Channel 0 Low Clamp

Channel 0 High Clamp

Channel 0 Ramp Rate

Word Description

24 Channel 3 Configuration Word 0

Channel 3 Configuration Word 1

Channel 3 Fault Value Word

Channel 3 Program Idle Mode Word

Channel 3 Low Clamp

Channel 3 High Clamp

Channel 3 Ramp Rate

Channel 0 Spare

Channel 1 Configuration Word 0

Channel 1 Configuration Word 1

Channel 1 Fault Value Word

Channel 1 Program Idle Mode Word 35

Channel 1 Low Clamp

Channel 1 High Clamp

Channel 1 Ramp Rate

Channel 3 Spare

Channel 4 Configuration Word 0

Channel 4 Configuration Word 1

Channel 4 Fault Value Word

Channel 4 Program Idle Mode Word

Channel 4 Low Clamp

Channel 4 High Clamp

Channel 4 Ramp Rate

Channel 1 Spare

Channel 2 Configuration Word 0

Channel 2 Configuration Word 1

Channel 2 Fault Value Word 42

Channel 2 Program Idle Mode Word 43

Channel 2 Low Clamp

Channel 2 High Clamp

Channel 2 Ramp Rate

Channel 2 Spare

Channel 4 Spare

Channel 5 Configuration Word 0

Channel 5 Configuration Word 1

Channel 5 Fault Value Word

Channel 5 Program Idle Mode Word

Channel 5 Low Clamp

Channel 5 High Clamp

Channel 5 Ramp Rate

Channel 5 Spare

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Module Data, Status, and Channel Configuration for the Output Modules 4-23

Word Description

48 Channel 6 Configuration Word 0

Channel 6 Configuration Word 1

Channel 6 Fault Value Word

Channel 6 Program Idle Mode Word

Channel 6 Low Clamp

Channel 6 High Clamp

Channel 6 Ramp Rate

Channel 6 Spare

Word Description

56 Channel 7 Configuration Word 0

Channel 7 Configuration Word 1

Channel 7 Fault Value Word

Channel 7 Program Idle Mode Word

Channel 7 Low Clamp

Channel 7 High Clamp

Channel 7 Ramp Rate

Channel 7 Spare

Table 4.11 1769-OF8C and -OF8V Word 0 and 1 Bit Descriptions

Word/

Bit

Word 0 E

14 13 12 11

Reserved

10 9 8 7 6

SIU SIO

PFE

Word 1 Reserved Output Data

Format Select

Reserved Output

Type/Range

The configuration file is typically modified using the programming software configuration screen. For information on configuring the module using

MicroLogix 1500 and RSLogix 500, see Appendix B; for CompactLogix and

RSLogix 5000, see Appendix C; for 1769-ADN DeviceNet Adapter and

1769-OF8C and -OF8V Channel Configuration on page 4-24.

The configuration file can also be modified through the control program, if supported by the controller. The structure and bit settings are shown in

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4-24 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C and -OF8V Channel Configuration

The first two words of each eight word group in the configuration file allow you to change the parameters of each channel independently. For example, words 8 and 9 correspond to channel 1 while words 56 and 57 correspond to channel 7.

Table 4.12 1769-OF8C Channel Configuration

(1)

Define Indicate this These bit settings

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 Program (Idle) to

Fault Enable

Hold for

Initialization

Program (Idle)

Mode Data

Applied

(2)

Fault Mode

Data Applied

Disabled

Enabled

Program (Idle)

Mode

Hold Last

State

User-Defined

Value

Fault Mode Hold Last

State

User-Defined

Fault Value

Refer to the 1769-OF8C and -OF8V Output Channel Configuration table.

Enable Ramping Disabled

Enable Clamp/

Alarm Latching

Enabled

Disabled

Enabled

Enable High

Clamp/ Alarm

Interrupt

Enable Low

Clamp/ Alarm

Interrupt

Disabled

Enabled

Disabled

Enabled

Enable Channel Disabled

Enabled

(1)

(2)

These functions are not supported by all controllers (e.g. MicroLogix 1500) using any configuration method. Refer to your controller manual for details.

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Module Data, Status, and Channel Configuration for the Output Modules 4-25

Table 4.13 1769-OF8C and -OF8V Output Channel Configuration

Define Indicate this

Output

Range

Select

Output

Data

Select

Output

Range

Select

Output

Data

Select

0 to 20 mA dc

4 to 20 mA dc

Raw/Proportion al Counts

Engineering

Units

Scaled for PID

Percent Range

-10…+10V dc

0…5V dc

0…10V dc

1…5V dc

Raw/Proportion al Counts

Engineering

Units

Scaled for PID

Percent Range

These bit settings

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

0 0 0

0 0 1

0 0 0

0 0 1

0 1 0

0 1 1

1769-OF8C and -OF8V Enable/Disable Channel

This configuration selection (bit 15) allows each channel to be individually enabled.

TIP

A channel that is not enabled has zero voltage or current at its terminal.

Clamping/Limiting

Clamping limits the output from the analog module to remain within a range configured by the controller, even when the controller commands an output outside that range. This safety feature sets a high clamp and a low clamp.

Once clamps are determined for a module, any data received from the controller that exceeds those clamps sets an appropriate limit alarm and transitions the output to that limit but not beyond the requested value.

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4-26 Module Data, Status, and Channel Configuration for the Output Modules

For example, an application may set the high clamp on a 1769-OF8C module for 15 mA and the low clamp for 5 mA. If a controller sends a value corresponding to 16 mA to the module, the module will only apply 15 mA to its screw terminals.

Clamping is disabled on a per channel basis by entering a 0 value for both the high and low clamps in the Configuration Data file. Interrupts are generated on a high- or low-alarm by setting (1) the SIO bit (for high-clamp or over-range alarm) or setting (1) the SIU bit (for low-clamp or under-range alarm). Alarms caused by exceeding over-/under-range or clamp limits can be latched by setting (1) a channel’s LA bit on a per channel basis.

Clamp/Limit Alarms

This function works directly with clamping. When a module receives a data value from the controller that exceeds clamping limits, it applies signal values at the clamping limit but also sends a status bit to the controller notifying it that the value sent exceeds the clamping limits.

With reference to the example in the Clamping/Limiting section, if a

1769-OF8C module has clamping limits of 15 mA and 5 mA but then receives data to apply 16 mA, only 15 mA is applied to the screw terminals. The module sends a status bit back to the controller informing it that the 16 mA value exceeds the module’s clamping limits.

Ramping

Ramping limits the speed at which an analog output signal can change. This prevents fast transitions in the output from damaging the devices that an output module controls.

Table 4.14 Ramping Types

Ramping Type

Ramp to Fault Mode

Description

This type of ramping occurs when the present output value changes to the Fault

Value after a communications fault occurs.

This is the only type of ramping for the

1769-OF8C and -OF8V modules.

The ramp rate is defined in terms of the selected range/format in units per second. For example, in the 0 to 20 mA range and percent of full scale format, a ramp rate of 1000 is 10%/second (since 1000 is 10% of the total number of counts in the full scale of the 0 to 20 mA range) or a maximum of 2 mA per

second. Table 4.15 and Table 4.16 describes how ramp rate is defined for all

output range/types and output data formats.

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Module Data, Status, and Channel Configuration for the Output Modules 4-27

Table 4.15 1769-OF8C Output Range/Types and Output Data Formats

Output Data

Format Output

Range/Type

Proportional Counts

Total Counts in

Full Scale

65534 0…20 mA

4…20 mA

Engineering Units

0…20 mA 21000

17800 4…20 mA

Scaled for PID

0…20 mA

4…20 mA

16383

Percent of Full Scale

0…20 mA 10000

4…20 mA

Number of Counts for Every 1% of

Ramp Rate

655

210

178

164

100

Real Units/Second for Every 1% of

Ramp Rate

0.2 mA/s

0.16 mA/s

0.2 mA/s

0.16 mA/s

0.2 mA/s

0.16 mA/s

0.2 mA/s

0.16 mA/s

Table 4.16 1769-OF8V Output Range/Types and Output Data Formats

Output Data

Format Output

Range/Type

Proportional Counts

Total Counts in

Full Scale

65534 -10…+10V

0…5V

0…10V

1…5V

Engineering Units

-10…+10V

0…5V

0…10V

1…5V

Scaled for PID

-10…+10V

0…5V

0…10V

1…5V

21000

5750

11000

4750

16383

Number of Counts for Every 1% of

Ramp Rate

655

210

110

164

Real Units/Second for Every 1% of

Ramp Rate

0.2V/s

0.05V/s

0.1V/s

0.04V/s

0.2V/s

0.05V/s

0.1V/s

0.04V/s

0.2V/s

0.05V/s

0.1V/s

0.04V/s

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4-28 Module Data, Status, and Channel Configuration for the Output Modules

Table 4.16 1769-OF8V Output Range/Types and Output Data Formats

Output Data

Format Output

Range/Type

Total Counts in

Full Scale

Percent of Full Scale

-10…+10V 10000

0…5V

0…10V

1…5V

Number of Counts for Every 1% of

Ramp Rate

100

Real Units/Second for Every 1% of

Ramp Rate

0.2V/s

0.05V/s

0.1V/s

0.04V/s

Ramping only takes place, if configured, when the output is being commanded to go to a fault state. Ramping is not done in normal run operation. The ramp rate values are entered in the Configuration Data file and are accepted as valid only if:

• The number of counts entered for a channel’s ramp rate is greater than or equal to a minimum of 1% of the total number of full scale counts

for the channel’s selected data format (see Table 4.14 and Table 4.15 for

minimum values).

• The number of counts entered for a channel’s ramp rate may be equal to

0 if ramping is not enabled for the channel.

Hold for Initialization

Hold for Initialization causes outputs to hold present state until the value commanded by the controller matches the value held by the module providing a bumpless transfer.

If Hold for Initialization is selected, outputs hold if any of these three conditions occur:

• initial connection is established after power-up

• new connection is established after a communications fault occurs

• transition to Run Mode from Program state

The Output Held bit (see the Input Data file) for a channel indicates that the channel is holding.

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Module Data, Status, and Channel Configuration for the Output Modules 4-29

Open Wire Detection (1769-OF8C Only)

This feature detects when current flow is not present on an output channel that is enabled and has a non-zero output value commanded.

When an open wire condition occurs channel, the diagnostic bit (D bit in

Input Data file status words) is set for that channel.

1769-OF8C and -OF8V Fault Mode (FM)

This configuration selection provides individual fault mode selection for the analog channels. When this selection is disabled [the bit is reset (0)], the module holds the last state , meaning that the analog output remains at the last converted value prior to the condition that caused the control system to enter the program mode.

IMPORTANT

Hold last state is the default condition for the 1769-OF8C and -OF8V during a control system run-to-program mode change.

TIP

MicroLogix 1500™ does not support the analog output module’s default hold last state function and resets analog outputs to zero when the system enters the program mode.

If this selection is enabled [the bit is set (1)] and the system enters the program mode, it commands the module to convert the user-specified value from the channel’s Fault mode word to the appropriate analog output for the range selected.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

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4-30 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C and -OF8V Program/Idle Mode (PM)

This configuration selection provides individual program/idle mode selection for the analog channels 0. When this selection is disabled [the bit is reset (0)], the module holds the last state , meaning that the analog output remains at the last converted value prior to the condition that caused the control system to enter the program mode.

IMPORTANT

Hold last state is the default condition for the 1769-OF8C and -OF8V during a control system run-to-program mode change.

TIP

MicroLogix 1500™ does not support the analog output module’s default hold last state function and resets analog outputs to zero when the system enters the program mode.

If this selection is enabled [the bit is set (1)] and the system enters the program mode, it commands the module to convert the user-specified value from the channel’s Program/Idle mode word to the appropriate analog output for the range selected.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

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Module Data, Status, and Channel Configuration for the Output Modules 4-31

1769-OF8C and -OF8V Program/Idle to Fault Enable (PFE)

If a system currently in program/idle mode faults, this setting determines whether the program/idle or fault value is applied to the output. If the selection is enabled [the bit is set (1)], the module applies the fault value. If the selection is disabled [the bit is reset (0)], the module applies the program/idle mode data value. The default setting is disabled.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

1769-OF8C and -OF8V Fault Value

Using words each channel’s Fault Value word, you can specify the values the outputs will assume when the system enters the fault mode. The default value is 0. Valid values are dependent upon the range selected in the range selection field. If the value you entered is outside the normal operating range for the output range selected, the module generates a configuration error.

For example, if you select engineering units for the 0 to 20 mA range and enter a fault value within the normal operating range (0 to 20000), the module will configure and operate correctly. However, if you enter a value outside the normal operating range (for example 21000), the module indicates a configuration error.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

EXAMPLE

• If the default value, 0000, is used and the range selected is 0 to 20 mA, the module will output 0 mA for all data formats.

• If the raw/proportional or engineering units format is selected and zero is entered as Program/Idle mode word in the 4 to 20 mA range (for 1769-OF8C) or the

1 to 5V range (for 1769-OF8V), a configuration error results.

•

See Table 4.17 1769-OF8C Valid Output Data Table

on page 4-33 and Table 4.18 1769-OF8V Valid Output

Data Table on page 4-34for more examples.

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4-32 Module Data, Status, and Channel Configuration for the Output Modules

1769-OF8C and -OF8V Program/Idle Value

Use each channel’s Program/Idle Mode word to set the integer values for the outputs to assume when the system enters the program mode. The values are dependent upon the range selected in the range selection field. If the value you entered is outside the normal operating range for the output range selected, the module generates a configuration error. The default value is 0.

For example, if you select engineering units for the 0 to 20 mA range and enter a program/idle value within the normal operating range (0 to 20000), the module will configure and operate correctly. However, if you enter a value outside the normal operating range (for example 21000), the module indicates a configuration error.

TIP

Not all controllers support this function. Refer to your controller’s user manual for details.

EXAMPLE

• If the default value, 0000, is used and the range selected is 0 to 20 mA, the module will output 0 mA for all data formats.

• If the raw/proportional or engineering units format is selected and zero is entered as Program/Idle mode word in the 4 to 20 mA range (for 1769-OF8C) or the

1 to 5V range (for 1769-OF8V), a configuration error results.

•

See Table 4.17 1769-OF8C Valid Output Data Table

on page 4-33 and Table 4.18 1769-OF8V Valid Output

Data Table on page 4-34 for more examples.

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Module Data, Status, and Channel Configuration for the Output Modules 4-33

OF8C

Normal

Operating

Range

Input

Value

1769-OF8C Valid Output Data Word Formats/Ranges

The following table shows the valid formats and data ranges accepted by the module.

Example Data

Table 4.17 1769-OF8C Valid Output Data Table

Output

Range

State

Raw/Proportio nal Data

Engineering

Unit

Scaled-for-PID Percent Full

Range

Decimal Range Decimal Range Decimal

Range

Decimal

Range

4 mA to

20 mA

0 mA to

20 mA

Over

21.0 mA

4.0 mA to

20.0 mA

+22.0 mA +21.0 mA

+21.0 mA +21.0 mA

Over

N/A

32767

N/A

32767

22000

21000

18431

17407

11250

10625

+20.0 mA +20.0 mA

Normal 29085 29085 20000

+4.0 mA +4.0 mA Normal -29822 -29822 4000

20000

4000

16383

10000

+3.2 mA +3.2 mA Under

0.0 mA +3.2 mA Under

-32767 -32767 3200

N/A N/A 0

3200

-819 -819

-4096 -819

-500 -500

-2500 -500

3.2 mA

Under 3.2 mA

Over

21.0 mA

0.0 mA to

20.0 mA

Under 0.0 mA

+22.0 mA +21.0 mA

21.0 mA +21.0 mA

20.0 mA +20.0 mA

0.0 mA

-1.0 mA

0.0 mA

Over

Normal

Under

N/A

32767

29646

-32767

N/A

32767

29646

-32767

N/A

22000

21000

20000

-1000

21000

20000

18201

17202

16383

-819

17202

16383

11000

10500

10000

-500

10500

10000

Publication 1769-UM002B-EN-P - July 2005

4-34 Module Data, Status, and Channel Configuration for the Output Modules

OF8V

Normal

Operating

Output

Range

Input

Value

1769-OF8V Valid Output Data Word Formats/Ranges

The following table shows the valid formats and data ranges accepted by the module.

Example Data

Table 4.18 1769-OF8V Valid Output Data Table

Output

Range

State

Raw/Proportio nal Data

Decimal Range

Engineering

Unit

Decimal Range

Scaled-for-PID Percent Full

Range

Decimal

Range

Decimal Range

±10V dc

0V to

5V dc

Over

10.5V dc

+10.5V dc

+11.0V dc

+10.5V dc

Over

N/A

32767

N/A

32767

11000

10500

17202

16793

11000

10500

-10V to

+10V dc

Under

-0.5V dc

0.0V dc

-10.0V dc

-10.5V dc -10.5V dc

-11.0V dc

0.0V dc Normal 0

-10.0V dc

0 0 0 8192

Normal -31207 -31207 -10000 -10000 0

Under -32767 -32767 -10500 -10500 -410 -10.5V dc

-11.0V dc

Under N/A N/A -11000 -10500 -819

Over

5.25V dc

5.5V dc +5.25V dc

5.25V dc 5.25V dc +5.25V dc

Over

N/A

32767

N/A

32767

5500

5250

8192

-10000

18021 17202 11000 10500

17202

-410

17202

-10500

-11000

10500

-10500

10500

0.0V dc to

5.0V dc

+10.0V dc

5.0V dc

0.0V dc

+10.0V dc

+5.0V dc

0.0V dc

Normal

-0.5V dc -0.5V dc -0.5V dc Under

Under

-0.5V dc

-1.0V dc -0.5V dc Under

31207

29918

-27068

-32767

N/A

31207

29918

-27068

-32767

N/A

10000

5000

-500

-1000

10000

5000

-500

16383

16383 16383 10000 10000

0 0 0 0

-1638

-3277

16383

-1638

10000

-1000

-2000

10000

-1000

Publication 1769-UM002B-EN-P - July 2005

Module Data, Status, and Channel Configuration for the Output Modules 4-35

OF8V

Normal

Operating

Output

Range

Input

Value

Example Data

Table 4.18 1769-OF8V Valid Output Data Table

Output

Range

State

Raw/Proportio nal Data

Decimal Range

Engineering

Unit

Decimal Range

Scaled-for-PID Percent Full

Range

Decimal

Range

Decimal Range

0V to 10V dc

1.0V to

5V dc

Over

10.5V dc

11.0V dc +10.5V dc

+10.5V dc +10.5V dc +10.5V dc

0.0V dc to

10.0V dc

-0.5V dc

+10.0V dc

0.0V dc

-0.5V dc

+10.0V dc

0.0V dc

Over

Normal

Normal -29788 -29788 0

-0.5V dc Under

N/A

32767

29788

-32767

N/A

32767

29788

-32767

11000

10500

10000

-500

10500

10000

-500

18021

17202

16383

-819

17202

16383

-819

11000

10500

10000

-500

10500

10000

-500

N/A N/A -1000 -500 -1638 -819 -1000 -500 Under

-5.0V dc

Over

5.25V dc

-1.0V dc -0.5V dc

+5.5V dc +5.25V dc

+5.25V dc +5.25V dc +5.25V dc

Under

Over

N/A

32767

N/A

32767

5500

5250

18431

17407

11250

10625

1.0V to

5.0V dc

0.5V dc

Under

0.5V dc

+5.0V dc +5.0V dc Normal

+1.0V dc +1.0V dc Normal -25869 -25869 1000

+0.5V dc +0.5V dc Under

0.0V dc 0.0V dc Under

29318 29318 5000

-32767 -32767 500

N/A N/A 0

5000

1000

500

16383

10000

-2048 -2048 -1250

-4096 -2048 -2500

10000

-1250

Publication 1769-UM002B-EN-P - July 2005

4-36 Module Data, Status, and Channel Configuration for the Output Modules

Notes:

Publication 1769-UM002B-EN-P - July 2005

Chapter

Module Diagnostics and Troubleshooting

Safety Considerations

This chapter describes troubleshooting the analog input and output modules.

This chapter contains information on:

• safety considerations when troubleshooting

• module vs. channel operation

• the module’s diagnostic features

• critical vs. non-critical errors

• module condition data

Safety considerations are an important element of proper troubleshooting procedures. Actively thinking about the safety of yourself and others, as well as the condition of your equipment, is of primary importance.

The following sections describe several safety concerns you should be aware of when troubleshooting your control system.

ATTENTION

Never reach into a machine to actuate a switch because unexpected motion can occur and cause injury.

Remove all electrical power at the main power disconnect switches before checking electrical connections or inputs/outputs causing machine motion.

Indicator Lights

When the green LED on the analog module is illuminated, it indicates that power is applied to the module.

Activating Devices When Troubleshooting

When troubleshooting, never reach into the machine to actuate a device.

Unexpected machine motion could occur.

Publication 1769-UM002B-EN-P - July 2005

5-2 Module Diagnostics and Troubleshooting

Module Operation vs.

Channel Operation

Stand Clear of the Machine

When troubleshooting any system problem, have all personnel remain clear of the machine. The problem could be intermittent, and sudden unexpected machine motion could occur. Have someone ready to operate an emergency stop switch in case it becomes necessary to shut off power to the machine.

Program Alteration

There are several possible causes of alteration to the user program, including extreme environmental conditions, Electromagnetic Interference (EMI), improper grounding, improper wiring connections, and unauthorized tampering. If you suspect a program has been altered, check it against a previously saved program on an EEPROM or UVPROM memory module.

Safety Circuits

Circuits installed on the machine for safety reasons, like over-travel limit switches, stop push buttons, and interlocks, should always be hard-wired to the master control relay. These devices must be wired in series so that when any one device opens, the master control relay is de-energized, thereby removing power to the machine. Never alter these circuits to defeat their function. Serious injury or machine damage could result.

The module performs operations at two levels:

• module level

• channel level

Module-level operations include functions such as power-up, configuration, and communication with a bus master, such as a MicroLogix 1500 controller.

Channel-level operations describe channel related functions, such as data conversion and over- or under-range detection.

Internal diagnostics are performed at both levels of operation. When detected, module error conditions are immediately indicated by the module status LED.

Both module hardware and channel configuration error conditions are reported to the controller. Channel over-range or under-range conditions are reported in the module’s input data table. Module hardware errors are typically reported in the controller’s I/O status file. Refer to your controller manual for details.

Publication 1769-UM002B-EN-P - July 2005

Power-up Diagnostics

Channel Diagnostics

Module Diagnostics and Troubleshooting 5-3

At module power-up, a series of internal diagnostic tests are performed. These diagnostic tests must be successfully completed or the module status LED remains off and a module error results and is reported to the controller.

Table 5.1 Diagnostics

If module status

LED is:

Off

Blinking

(1)

Indicated condition:

Proper

Operation

Corrective action:

No action required.

Module Fault Cycle power. If condition persists, replace the module. Call your local distributor or Rockwell

Automation for assistance.

Isolated 24V

Power Not

Present

Check external power switch setting. Check wiring to external power supply terminals. Check external power supply.

(1)

1769-OF8V and -OF8C only.

When an input or output module channel is enabled, the module performs a diagnostic check to see that the channel has been properly configured. In addition, the module checks each channel on every scan for configuration errors, over-range and under-range, open-circuit (input module in 4 to 20 mA range only) and output wire broken/high load resistance (output module only) conditions.

Out-of-Range Detection (Input and Output Modules)

For input modules, whenever the data received at the channel word is out of the defined operating range, an over-range or under-range error is indicated in the Input Data file.

For output modules, whenever the controller is driving data over or under the defined operating range, an over-range or under-range error is indicated in the

Input Data file.

Open-Circuit Detection (Input Modules Only)

The module performs an open-circuit test on all enabled channels configured for 4 to 20 mA inputs. Whenever an open-circuit condition occurs, the under-range bit for that channel is set in the Input Data file.

Possible causes of an open circuit include:

• the sensing device may be broken

• a wire may be loose or cut

• the sensing device may not be installed on the configured channel

Publication 1769-UM002B-EN-P - July 2005

5-4 Module Diagnostics and Troubleshooting

Output Wire Broken/High Load Resistance (Output Modules Only)

A check is performed on all enabled channels to determine if an output wire is broken, or if the load resistance is high, in the case of current mode outputs.

Whenever one of these conditions is present, the diagnostic bit for that channel is set in the Input Data file.

Non-critical vs. Critical

Module Errors

Non-critical module errors are typically recoverable. Channel errors

(over-range or under-range errors) are non-critical. Non-critical error conditions are indicated in the module input data table. Non-critical

configuration errors are indicated by the extended error code. See Table 5.4

1769-IF4 and -OF2 Extended Error Codes on page 5-6.

Critical module errors are conditions that prevent normal or recoverable operation of the system. When these types of errors occur, the system typically leaves the run or program mode of operation until the error can be dealt with.

Critical module errors are indicated in Table 5.4 1769-IF4 and -OF2 Extended

Error Codes on page 5-6.

Module Error Definition

Table

“Don’t Care” Bits

Hex Digit 4

Analog module errors are expressed in two fields as four-digit Hex format with the most significant digit as “don’t care” and irrelevant. The two fields are

“Module Error” and “Extended Error Information”. The structure of the module error data is shown below.

Table 5.2 Module Error Table

Module Error

Hex Digit 3

Extended Error Information

Hex Digit 2

Hex Digit 1

Publication 1769-UM002B-EN-P - July 2005

Module Diagnostics and Troubleshooting 5-5

Module Error Field

The purpose of the module error field is to classify module errors into three distinct groups, as described in the table below. The type of error determines what kind of information exists in the extended error information field. These types of module errors are typically reported in the controller’s I/O status file.

Refer to your controller manual for details.

Table 5.3 Module Error Types

Error

Type

No Errors

Module Error

Field Value

Bits 11 through 09

(Bin)

000

Description

Hardware

Errors

Configurat ion Errors

001

010

No error is present. The extended error field holds no additional information.

General and specific hardware error codes are specified in the extended error information field.

Module-specific error codes are indicated in the extended error field. These error codes correspond to options that you can change directly. For example, the input range or input filter selection.

Extended Error Information Field

Check the extended error information field when a non-zero value is present in the module error field. Depending upon the value in the module error field, the extended error information field can contain error codes that are module-specific or common to all 1769 analog modules.

TIP

If no errors are present in the module error field, the extended error information field will be set to zero.

Hardware Errors

General or module-specific hardware errors are indicated by module error

code 2. See Table 5.4 1769-IF4 and -OF2 Extended Error Codes on page 5-6,

Table 5.5 1769-IF8 Extended Error Codes on page 5-7, and Table 5.6

1769-OF8C and -OF8V Extended Error Codes on page 5-10.

Publication 1769-UM002B-EN-P - July 2005

5-6 Module Diagnostics and Troubleshooting

Configuration Errors

If you set the fields in the configuration file to invalid or unsupported values, the module ignores the invalid configuration, generates a non-critical error, and keeps operating with the previous configuration.

Each type of analog module has different features and different error codes.

See Table 5.4 1769-IF4 and -OF2 Extended Error Codes on page 5-6, Table

5.5 1769-IF8 Extended Error Codes on page 5-7, and Table 5.6 1769-OF8C and -OF8V Extended Error Codes on page 5-10.

Error Codes

Error codes can help troubleshoot your module.

Table 5.4 1769-IF4 and -OF2 Extended Error Codes

Error Type Hex

Equivalent

(1)

No Error

General Common

Hardware Error

Hardware-

Specific Error

1769-IF4 Specific

Configuration

Error

X000

X200

X201

X300

X301

X400

X401

X402

X403

X404

X405

X406

X407

X408

X409

X40A

X40B

X40C

010

001

010

Module

Error

Code

Binary

000

001

Extended Error

Information

Code

Binary

Error Description

0 0000 0000 No Error

0 0000 0000 General hardware error; no additional information

0 0000 0001 Power-up reset state

0 1000 0000 General hardware error, loss of external 24V dc power

0 1000 0001 Microprocessor hardware error

0 0000 0000 General configuration error; no additional information

0 0000 0001 invalid input range selected (channel 0)

0 0000 0010 invalid input range selected (channel 1)

0 0000 0011 invalid input range selected (channel 2)

0 0000 0100 invalid input range selected (channel 3)

0 0000 0101 invalid input filter selected (channel 0)

0 0000 0110 invalid input filter selected (channel 1)

0 0000 0111 invalid input filter selected (channel 2)

0 0000 1000 invalid input filter selected (channel 3)

0 0000 1001 invalid input format selected (channel 0)

0 0000 1010 invalid input format selected (channel 1)

0 0000 1011 invalid input format selected (channel 2)

0 0000 1100 invalid input format selected (channel 3)

Publication 1769-UM002B-EN-P - July 2005

Module Diagnostics and Troubleshooting 5-7

Table 5.4 1769-IF4 and -OF2 Extended Error Codes

Error Type

1769-OF2 Specific

Configuration

Error

Hex

Equivalent

(1)

X400

X401

X402

X403

X404

X405

X406

X407

X408

(1)

X represents the “Don’t Care” digit.

Module

Error

Code

Binary

010

Extended Error

Information

Code

Error Description

Binary

0 0000 0000 General configuration error; no additional information

0 0000 0001 invalid output range selected (channel 0)

0 0000 0010 invalid output range selected (channel 1)

0 0000 0011 invalid output data format selected (channel 0)

0 0000 0100 invalid output data format selected (channel 1)

0 0000 0101 invalid fault value entered for data format selected (channel 0)

0 0000 0110 invalid fault value entered for data format selected (channel 1)

0 0000 0111 invalid program value entered for data format selected (channel 0)

0 0000 1000 invalid program value entered for data format selected (channel 1)

Table 5.5 1769-IF8 Extended Error Codes

Error Type Hex

Equivalent

(1)

No Error

General Common

Hardware Error

Hardware-

Specific Error

X000

X200

X201

X300

X301

X302

Module

Error

Code

Binary

000

001

Extended Error

Information

Code

Error Description

Binary

0 0000 0000 No Error

0 0000 0000 General hardware error; no additional information

0 0000 0001 Power-up reset state

0 1000 0000 General hardware error, loss of external 24V dc power

0 1000 0001 Microprocessor hardware error

1 0000 0010 A/D converter communication error

Publication 1769-UM002B-EN-P - July 2005

5-8 Module Diagnostics and Troubleshooting

Table 5.5 1769-IF8 Extended Error Codes

Error Type Hex

Equivalent

(1)

1769-IF8 Specific

Configuration

Error

010

Module

Error

Code

Binary

010

X407

X408

X409

X40A

X40B

X40C

X40D

X40E

X400

X401

X402

X403

X404

X405

X406

X413

X414

X415

X416

X417

X40F

X410

X411

X412

X418

X419

X41A

Extended Error

Information

Code

Error Description

Binary

0 0000 0000 General configuration error; no additional information

0 0000 0001 invalid input range selected (channel 0)

0 0000 0010 invalid input range selected (channel 1)

0 0000 0011 invalid input range selected (channel 2)

0 0000 0100 invalid input range selected (channel 3)

0 0000 0101 invalid input range selected (channel 4)

0 0000 0110 invalid input range selected (channel 5)

0 0000 0111 invalid input range selected (channel 6)

0 0000 1000 invalid input range selected (channel 7)

0 0000 1001 invalid input filter selected (channel 0)

0 0000 1010 invalid input filter selected (channel 1)

0 0000 1011 invalid input filter selected (channel 2)

0 0000 1100 invalid input filter selected (channel 3)

0 0000 1101 invalid input filter selected (channel 4)

0 0000 1110 invalid input filter selected (channel 5)

0 0000 1111 invalid input filter selected (channel 6)

0 0001 0000 invalid input filter selected (channel 7)

0 0001 0001 invalid input format selected (channel 0)

0 0001 0010 invalid input format selected (channel 1)

0 0001 0011 invalid input format selected (channel 2)

0 0001 0100 invalid input format selected (channel 3)

0 0001 0101 invalid input format selected (channel 4)

0 0001 0110 invalid input format selected (channel 5)

0 0001 0111 invalid input format selected (channel 6)

0 0001 1000 invalid input format selected (channel 7)

0 0001 1001 alarm not enabled (channel 0)

0 0001 1010 alarm not enabled (channel 1)

Publication 1769-UM002B-EN-P - July 2005

Module Diagnostics and Troubleshooting 5-9

Table 5.5 1769-IF8 Extended Error Codes

Error Type Hex

Equivalent

(1)

1769-IF8 Specific

Configuration

Error

X426

X427

X428

X429

X422

X423

X424

X425

X41B

X41C

X41D

X41E

X41F

X420

X421

(1)

X represents the “Don’t Care” digit.

Module

Error

Code

Binary

010

Extended Error

Information

Code

Error Description

Binary

0 0001 1011 alarm not enabled (channel 2)

0 0001 1100 alarm not enabled (channel 3)

0 0001 1101 alarm not enabled (channel 4)

0 0001 1110 alarm not enabled (channel 5)

0 0001 1111 alarm not enabled (channel 6)

0 0010 0000 alarm not enabled (channel 7)

0 0010 0001 invalid alarm data selected (channel 0)

0 0010 0010 invalid alarm data selected (channel 1)

0 0010 0011 invalid alarm data selected (channel 2)

0 0010 0100 invalid alarm data selected (channel 3)

0 0010 0101 invalid alarm data selected (channel 4)

0 0010 0110 invalid alarm data selected (channel 5)

0 0010 0111 invalid alarm data selected (channel 6)

0 0010 1000 invalid alarm data selected (channel 7)

0 0010 1001 invalid real time sample rate value

Publication 1769-UM002B-EN-P - July 2005

5-10 Module Diagnostics and Troubleshooting

Table 5.6 1769-OF8C and -OF8V Extended Error Codes

Error Type

No Error

General Common

Hardware Error

Hex

Equivalent

(1)

X000

X200

X201

X216

X220

X221

Module

Error

Code

Binary

000

001

X300 001

Extended Error

Information

Code

Error Description

Binary

0 0000 0000 No Error

0 0000 0000 General hardware error; no additional information

0 0000 0001 Power-up reset state

0 0001 0110 Microprocessor watchdog error

0 0010 0000 Firmware corrupt (checksum failure)

0 0010 0001 Firmware checksum error in NVRAM (calibration data checksum failure)

1 0000 0000 General hardware error (ASIC) Hardware-

Specific Error

1769-OF8C and

-OF8V Specific

Configuration

Error

X409

X40A

X40B

X40C

X40D

X40E

X40F

X410

X411

X412

X405

X406

X407

X408

X401

X402

X403

X404

X413

X414

X415

X416

X417

X418

X419

010

0 0000 0001 invalid input range selected (channel 0)

0 0000 0010 invalid input range selected (channel 1)

0 0000 0011 invalid input range selected (channel 2)

0 0000 0100 invalid input range selected (channel 3)

0 0000 0101 invalid input range selected (channel 4)

0 0000 0110 invalid input range selected (channel 5)

0 0000 0111 invalid input range selected (channel 6)

0 0000 1000 invalid input range selected (channel 7)

0 0000 1001 invalid data format selected (channel 0)

0 0000 1010 invalid data format selected (channel 1)

0 0000 1011 invalid data format selected (channel 2)

0 0000 1100 invalid data format selected (channel 3)

0 0000 1101 invalid data format selected (channel 4)

0 0000 1110 invalid data format selected (channel 5)

0 0000 1111 invalid data format selected (channel 6)

0 0001 0000 invalid data format selected (channel 7)

0 0001 0001 invalid fault value (channel 0)

0 0001 0010 invalid fault value (channel 1)

0 0001 0011 invalid fault value (channel 2)

0 0001 0100 invalid fault value (channel 3)

0 0001 0101 invalid fault value (channel 4)

0 0001 0110 invalid fault value (channel 5)

0 0001 0111 invalid fault value (channel 6)

0 0001 1000 invalid fault value (channel 7)

0 0001 1001 invalid idle value (channel 0)

Publication 1769-UM002B-EN-P - July 2005

Module Diagnostics and Troubleshooting 5-11

Table 5.6 1769-OF8C and -OF8V Extended Error Codes

Error Type Hex

Equivalent

(1)

1769-OF8C and

-OF8V Specific

Configuration

Error

010

Module

Error

Code

Binary

010

X435

X436

X437

X438

X439

X43A

X429

X42A

X42B

X42C

X42D

X42E

X42F

X430

X431

X432

X433

X434

X425

X426

X427

X428

X421

X422

X423

X424

X41A

X41B

X41C

X41D

X41E

X41F

X420

Extended Error

Information

Code

Error Description

Binary

0 0001 1010 invalid idle value (channel 1)

0 0001 1011 invalid idle value (channel 2)

0 0001 1100 invalid idle value (channel 3)

0 0001 1011 invalid idle value (channel 4)

0 0001 1100 invalid idle value (channel 5)

0 0001 1101 invalid idle value (channel 6)

0 0010 0000 invalid idle value (channel 7)

0 0010 0001 invalid clamps (channel 0)

0 0010 0010 invalid clamps (channel 1)

0 0010 0011 invalid clamps (channel 2)

0 0010 0100 invalid clamps (channel 3)

0 0010 0101 invalid clamps (channel 4)

0 0010 0110 invalid clamps (channel 5)

0 0010 0111 invalid clamps (channel 6)

0 0010 1000 invalid clamps (channel 7)

0 0010 1001 invalid ramp rate (channel 0)

0 0010 1010 invalid ramp rate (channel 1)

0 0010 1011 invalid ramp rate (channel 2)

0 0010 1100 invalid ramp rate (channel 3)

0 0010 1101 invalid ramp rate (channel 4)

0 0010 1110 invalid ramp rate (channel 5)

0 0010 1111 invalid ramp rate (channel 6)

0 0011 0000 invalid ramp rate (channel 7)

0 0011 0001 configuration word 0 illegal bits set (channel 0)

0 0011 0010 configuration word 0 illegal bits set (channel 1)

0 0011 0011 configuration word 0 illegal bits set (channel 2)

0 0011 0100 configuration word 0 illegal bits set (channel 3)

0 0011 0101 configuration word 0 illegal bits set (channel 4)

0 0011 0110 configuration word 0 illegal bits set (channel 5)

0 0011 1011 configuration word 0 illegal bits set (channel 6)

0 0011 1000 configuration word 0 illegal bits set (channel 7)

0 0011 1001 configuration word 1 illegal bits set (channel 0)

0 0011 1010 configuration word 1 illegal bits set (channel 1)

Publication 1769-UM002B-EN-P - July 2005

5-12 Module Diagnostics and Troubleshooting

Table 5.6 1769-OF8C and -OF8V Extended Error Codes

Error Type

1769-OF8C and

-OF8V Specific

Configuration

Error

Hex

Equivalent

(1)

X43B

X43C

X43D

X43E

X43F

X440

(1)

X represents the “Don’t Care” digit.

Module

Error

Code

Binary

010

Extended Error

Information

Code

Error Description

Binary

0 0011 1011 configuration word 1 illegal bits set (channel 2)

0 0011 1100 configuration word 1 illegal bits set (channel 3)

0 0011 1101 configuration word 1 illegal bits set (channel 4)

0 0011 1110 configuration word 1 illegal bits set (channel 5)

0 0011 1111 configuration word 1 illegal bits set (channel 6)

0 0100 0000 configuration word 1 illegal bits set (channel 7)

Module Inhibit Function

CompactLogix controllers support the module inhibit function. See your controller manual for details.

Whenever the output modules are inhibited, the modules enter the program mode and the output channel is changed to the state configured for the program mode. Whenever the input modules are inhibited, the modules continue to provide information about changes at its inputs to the 1769

Compact Bus Master (for example, a CompactLogix controller).

Contacting Rockwell

Automation

If you need to contact Rockwell Automation for assistance, please have the following information available when you call:

• a clear statement of the problem, including a description of what the system is actually doing. Note the LED state; also note input and output image words for the module.

• a list of remedies you have already tried

• processor type and firmware number (See the label on the processor.)

• hardware types in the system, including all I/O modules

• fault code if the processor is faulted

Publication 1769-UM002B-EN-P - July 2005

Appendix

Specifications

General Specifications for

1769-IF4, -IF8, -OF2, -OF8C, and -OF8V Modules

Table A.1 General Specifications

Specification

Dimensions

Approximate Shipping Weight

(with carton)

Storage Temperature

Operating Temperature

Operating Humidity

Operating Altitude

Vibration

Shock

System Power Supply Distance

Rating

Optional 24V dc Class 2 Power

Supply Voltage Range

(1)

Recommended Cable

Maximum Cable Length

Agency Certification

Hazardous Environment Class

Radiated and Conducted

Emissions

Value

118 mm (height) x 87 mm (depth) x 35 mm (width)

[52.5 mm (width) for 1769-IF8]

Height including mounting tabs is 138 mm

4.65 in (height) x 3.43 in (depth) x 1.38 in (width)

[2.07 in (width) for 1769-IF8]

Height including mounting tabs is 5.43 in

300g (0.65 lbs.)

1769-IF8 - 450g (0.99 lbs.)

-40°C to +85°C (-40°F to +185°F)

0°C to +60°C (32°F to +140°F)

5% to 95% non-condensing

2000 meters (6561 feet)

Operating: 10 to 500 Hz, 5G, 0.030 in. peak-to-peak

Relay Operation: 2G

Operating: 30G, 11 ms panel mounted

(20G, 11 ms DIN rail mounted)

Relay Operation: 7.5G panel mounted

(5G DIN rail mounted)

Non-Operating: 40G panel mounted

(30G DIN rail mounted)

8 (The module may not be more than 8 modules away from a system power supply.)

20.4 V to 26.4V dc

Belden™ 8761 (shielded)

1769-IF4 and -IF8: See “Effect of

Transducer/Sensor and Cable Length Impedance on Voltage Input Accuracy” on page 2-12

1769-OF2, -OF8C, and -OF8V: See “Effect of Device and Cable Output Impedance on Output Module

Accuracy” on page 2-13

•

C-UL certified (under CSA C22.2 No. 142)

•

UL 508 listed

•

CE compliant for all applicable directives

Class I, Division 2, Hazardous Location, Groups A,

B, C, D (UL 1604, C-UL under CSA C22.2 No. 213)

EN50081-2 Class A

Publication 1769-UM002B-EN-P - July 2005

A-2 Specifications

Specification

Electrical /EMC:

Value

The module has passed testing at the following levels:

•

4 kV contact, 8 kV air, 4 kV indirect

•

ESD Immunity

(IEC1000-4-2)

•

Radiated Immunity

(IEC1000-4-3)

•

Fast Transient Burst

(IEC1000-4-4)

•

Surge Immunity

(IEC1000-4-5)

•

Conducted Immunity

(IEC1000-4-6)

•

10 V/m , 80 to 1000 MHz, 80% amplitude modulation, +900 MHz keyed carrier

2 kV, 5kHz

1kV galvanic gun

10V, 0.15 to 80MHz

(2)

(1)

Failure to use a Class 2 power supply without regulation within these limits could result in improper module operation.

(2)

Conducted Immunity frequency range may be 150 kHz to 30 MHz if the Radiated Immunity frequency range is

30 MHz to 1000 MHz.

Publication 1769-UM002B-EN-P - July 2005

1769-IF4 Input

Specifications

Specifications A-3

Table A.2 1769-IF4 Specifications

Specification

Analog Normal Operating

Ranges

Full Scale

(1)

Analog Ranges

1769-IF4 (Series B and later)

Voltage: ± 10V dc, 0 to 10V dc, 0 to 5V dc, 1 to 5V dc

Current: 0 to 20 mA, 4 to 20 mA

Voltage: ± 10.5V dc, -0.5 to 10.5V dc, -0.5 to 5.25V dc,

0.5 to 5.25V dc

Current: 0 to 21 mA, 3.2 to 21 mA

4 differential or single-ended

120 mA at 5V dc

Number of Inputs

Bus Current Draw (max.)

Heat Dissipation

Converter Type

Response Speed per

Channel

Resolution (max.)

60 mA at 24V dc

(7)

2.63 Total Watts (The Watts per point, plus the minimum

Watts, with all points energized.)

Delta Sigma

Input filter and configuration dependent. See “Channel

Step Response” on page 3-6.

14 bits (unipolar)

14 bits plus sign (bipolar)

See “Effective Resolution” on page 3-13.

30V ac/30V dc

±10V maximum per channel

Rated Working Voltage

(2)

Common Mode Voltage

Range

(3)

Common Mode Rejection

Normal Mode Rejection

Ratio

Input Impedance greater than 60 dB at 50 and 60 Hz with the 50 or 60 Hz filter selected, respectively

-50 dB at 50/60 Hz with the 50 or 60 Hz filter selected, respectively

Voltage Terminal: 220K

Ω

(typical)

Current Terminal: 250

Ω

Voltage Terminal: ±0.2% full scale at 25°C

Overall Accuracy

(4)

Accuracy Drift with

Temperature

Current Terminal: ±0.35% full scale at 25°C

Voltage Terminal: ±0.003% per °C

Calibration

Non-linearity (in percent full scale)

Repeatability

(5)

Module Error over Full

Temperature Range

(0 to +60°C [+32°F to

+140°F])

Current Terminal: ±0.0045% per °C

The module performs autocalibration on channel enable and on configuration change between channels.

±0.03%

Voltage: ±0.3%

Current: ±0.5%

Publication 1769-UM002B-EN-P - July 2005

A-4 Specifications

Specification

Input Channel Configuration via configuration software screen or the user program

(by writing a unique bit pattern into the module’s configuration file). Refer to your controller manual to determine if user program configuration is supported.

Module OK LED

1769-IF4 (Series B and later)

On: module has power, has passed internal diagnostics, and is communicating over the bus.

Channel Diagnostics

Maximum Overload at Input

Terminals

(6)

Off: Any of the above is not true.

Over or under range by bit reporting

Voltage Terminal: ±30V continuous, 0.1 mA

Input Group to Backplane

Isolation

Current Terminal: ±32 mA continuous, ±7.6 V

500V ac or 710V dc for 1 minute (qualification test)

Vendor I.D. Code

Product Type Code

Product Code

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

(1)

The over- or under-range flag will come on when the normal operating range (over/under) is exceeded. The module will continue to convert the analog input up to the maximum full scale range. The flag automatically resets when within the normal operating range.

(2)

Rated working voltage is the maximum continuous voltage that can be applied at the input terminal, including the input signal and the value that floats above ground potential (for example, 10V dc input signal and 20V dc potential above ground).

(3)

For proper operation, both the plus and minus input terminals must be within ±10V dc of analog common.

(4)

Includes offset, gain, non-linearity and repeatability error terms.

(5)

Repeatability is the ability of the input module to register the same reading in successive measurements for the same input signal.

(6)

Damage to the input circuit may occur if this value is exceeded.

(7)

If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.

Publication 1769-UM002B-EN-P - July 2005

1769-IF8 Input

Specifications

Specifications A-5

Table A.3 1769-IF8 Specifications

Specification 1769-IF8

Analog Normal Operating

Ranges

(1)

Voltage: ± 10V dc, 0 to 10V dc, 0 to 5V dc, 1 to 5V dc

Current: 0 to 20 mA, 4 to 20 mA

Full Scale Analog

Ranges

See “1769-OF2 Module Resolution” on page 4-15.

Voltage: ± 10.5V dc, 0 to 10.5V dc, 0 to 5.25V dc, 0.5 to 5.25V dc

Current: 0 to 21 mA, 3.2 to 21 mA

Number of Inputs

Heat Dissipation

8 differential or single-ended

Bus Current Draw (max.) 120 mA at 5V dc

70 mA at 24V dc

3.24 Total Watts (The Watts per point, plus the minimum

Watts, with all points energized.)

Converter Type Delta Sigma

Response Speed per

Channel

Resolution (max.)

(2)

Input filter and configuration dependent. See your user’s manual.

16 bits (unipolar)

15 bits plus sign (bipolar)

Rated Working Voltage

(3)

Common Mode Voltage

Range

(4)

30V ac/30V dc

±10V dc maximum per channel

Common Mode Rejection greater than 60 dB at 50 and 60 Hz with the 10 Hz filter selected, respectively.

Normal Mode Rejection

Ratio

Input Impedance

-50 dB at 50 and 60 Hz with the 10 Hz filter selected, respectively.

Voltage Terminal: 220K

Current Terminal: 250

Ω

Ω ( typical)

Overall Accuracy

(5) Voltage Terminal: ±0.2% full scale at 25°C

Current Terminal: ±0.35% full scale at 25°C

(1)

(2)

Resolution is dependent upon your filter selection. The maximum resolution is achieved with the 10 Hz filter selected. For resolution with other filter selections, refer to the user manual, publication 1769-UM002.

(3)

(4)

For proper operation, both the plus and minus input terminals must be within ±10V dc of analog common.

(5)

Includes offset, gain, non-linearity and repeatability error terms.

Publication 1769-UM002B-EN-P - July 2005

A-6 Specifications

Specification

Accuracy Drift with

Temperature

Calibration

1769-IF8

Voltage Terminal: ±0.003% per °C

Current Terminal: ±0.0045% per °C

The module performs autocalibration on channel enable and on a configuration change between channels.

±0.03% Non-linearity (in percent full scale)

Repeatability

(1) ±0.03%

Module Error over Full

Temperature Range

(0 to +60°C [+32°F to

+140°F])

Voltage: ±0.3%

Current: ±0.5%

Input Channel Configuration via configuration software screen or the user program (by writing a unique bit pattern into the module’s configuration file). Refer to your controller’s user manual to determine if user program configuration is supported.

Module OK LED On: module has power, has passed internal diagnostics, and is communicating over the bus.

Off: Any of the above is not true.

Channel Diagnostics Over- or under-range by bit reporting, process alarms

Maximum Overload at Input

Terminals

(2)

Voltage Terminal: ±30V dc continuous, 0.1 mA

Current Terminal: ±32 mA continuous, ±7.6 V dc

System Power Supply

Distance Rating

Recommended Cable

8 (The module may not be more than 8 modules away from the system power supply.)

Belden™ 8761 (shielded)

Input Group to Bus Isolation 500V ac or 710V dc for 1 minute (qualification test)

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

Vendor I.D. Code 1

Product Type Code

Product Code

(1)

Repeatability is the ability of the input module to register the same reading in successive measurements for the same input signal.

(2)

Damage may occur to the input circuit if this value is exceeded.

Publication 1769-UM002B-EN-P - July 2005

1769-OF2 Output

Specifications

Specifications A-7

Table A.4 1769-OF2 Specifications

Specification

Analog Ranges

(1)

Full Scale Analog Ranges

1769-OF2 (Series B and later)

Voltage: ±10V dc, 0 to 10V dc, 0 to 5V dc, 1 to 5V dc

Current: 0 to 20 mA, 4 to 20 mA

Voltage: ±10.5V dc, -0.5 to 10.5V dc, -0.5 to 5.25V dc,

0.5 to 5.25V dc

Number of Outputs

Bus Current Draw (max.)

Heat Dissipation

Current: 0 - 21 mA, 3.2 - 21 mA

2 single-ended

120 mA at 5V dc

120 mA at 24V dc

(7)

2.52 Total Watts (The Watts per point, plus the minimum Watts, with all points energized.)

Sigma-Delta Converter Type

Analog Data Format

Digital Resolution Across Full

Range

14-bit, two’s complement. The Most Significant Bit is the sign bit.

14 bits (unipolar)

14 bits plus sign (bipolar)

2.5 ms Conversion Rate (all channels) max.

Step Response to 63%

(2) 2.9 ms

Current Load on Voltage Output 10 mA max.

Resistive Load on Current

Output

0 to 500

Ω

(includes wire resistance)

Load Range on Voltage Output >1 k

Ω at 10V dc

0.1 mH Max. Inductive Load

(Current Outputs)

Max. Capacitive Load

(Voltage Outputs)

Overall Accuracy

(3)

1 µF

Voltage Terminal: ±0.5% full scale at 25°C

Current Terminal: ±0.35% full scale at 25°C

Accuracy Drift with Temperature Voltage Terminal: ±0.0086% FS per °C

Current Terminal: ±0.0058% FS per °C

±0.05%

Output Ripple;

(4) range 0 - 50 kHz

(referred to output range)

Calibration

Non-linearity

(in percent full scale)

Repeatability

(5)

(in percent full scale)

None required (guaranteed by hardware design).

±0.05%

Publication 1769-UM002B-EN-P - July 2005

A-8 Specifications

Publication 1769-UM002B-EN-P - July 2005

Specification

Output Error Over Full

Temperature Range

(0 to 60°C [32 to +140°F])

Output Offset Error

(0 to 60°C [32 to +140°F])

Output Impedance

1769-OF2 (Series B and later)

Voltage: ±0.8%

Current: ±0.55%

±0.05%

Open and Short-Circuit

Protection

Ω

(typical)

Yes

Maximum Short-Circuit Current 21 mA

Output Overvoltage Protection Yes

Time to Detect Open Wire

Condition (Current Mode)

Output Response at Power Up and Power Down

Rated Working Voltage

(6)

Module OK LED

10 ms typical

13.5 ms maximum

±0.5 V spike for <5 ms

30V ac/30V dc

On: module has power, has passed internal diagnostics, and is communicating over the bus.

Channel Diagnostics

Off: Any of the above is not true.

Over or under range by bit reporting output wire broken or load resistance high by bit reporting (current mode only)

500V ac or 710V dc for 1 minute (qualification test) Output Group to Backplane

Isolation

Vendor I.D. Code

Product Type Code

Product Code

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

(1)

(2)

Step response is the period of time between when the D/A converter was instructed to go from minimum to full range until the device is at 63% of full range. Time applies to one or both channels.

(3)

Includes offset, gain, non-linearity and repeatability error terms.

(4)

Output ripple is the amount a fixed output varies with time, assuming a constant load and temperature.

(5)

Repeatability is the ability of the output module to reproduce output readings when the same controller value is applied to it consecutively, under the same conditions and in the same direction.

(6)

(7)

If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.

1769-OF8C Output

Specifications

Specifications A-9

Table A.5 1769-OF8C Specifications

Specification 1769-OF8C

Analog Normal Operating

Ranges

(1)

0 to 20 mA, 4 to 20 mA

Full Scale Analog Ranges

0 to 21 mA, 3.2 to 21 mA

Number of Outputs

Bus Current Draw (max.)

Heat Dissipation

Digital Resolution Across Full

Range

8 single-ended

145 mA at 5V dc

160 mA at 24V dc

(2)

2.69 Total Watts (All points - 21 mA into 250

Ω

- worst case calculated.)

16 bits (unipolar)

Conversion Rate (all channels) max.

+4 to +20 mA: 15.59 bits, 0.323 µA/bit

0 to +20 mA: 15.91 bits, 0.323 µA/bit

5 ms

Step Response to 63%

Resistive Load on Current

Output

(3) <2.9 ms

0 to 500

Ω

(includes wire resistance)

Max. Inductive Load

Field Calibration

Overall Accuracy

(4)

0.1 mH

None required

±0.35% full scale at 25°C

(1)

(2)

If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.

(3)

Step response is the period of time between when the D/A converter was instructed to go from minimum to full range until the device is at 63% of full range.

(4)

Includes offset, gain, drift, non-linearity and repeatability error terms.

Publication 1769-UM002B-EN-P - July 2005

A-10 Specifications

Specification

Accuracy Drift with

Temperature

Output Ripple

(1) range 0 to 50 kHz

(referred to output range)

1769-OF8C

±0.0058% FS per °C

±0.05%

Non-linearity (in percent full scale)

Repeatability

(2)

(in percent full scale)

±0.05%

Output Error Over Full

Temperature Range

(0 to 60°C [+32 to +140°F])

Output Offset Error

(0 to 60°C [+32 to +140°F])

Output Impedance

Time to Detect Open Wire

Condition

Output Response at System

Power Up and Power Down

Current: ±0.55%

±0.05%

Open and Short-Circuit

Protection

>1 M

Ω

Yes

Maximum Short-Circuit Current 21 mA

Output Overvoltage Protection Yes

5 ms

± 0.5V dc spike for < 5 ms

Rated Working Voltage

(3) 30V ac/30V dc

Output Group to Bus Isolation 500V ac or 710V dc for 1 minute (qualification test)

Module OK LED

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

On: module has power, has passed internal diagnostics, and is communicating over the bus.

Flashing: external power failure.

Channel Diagnostics

Off: Any of the above is not true.

Over- or under-range by bit reporting output wire broken or load resistance high by bit reporting

(1)

Output ripple is the amount a fixed output varies with time, assuming a constant load and temperature.

(2)

Repeatability is the ability of the output module to reproduce output readings when the same controller value is applied to it consecutively, under the same conditions and in the same direction.

(3)

Publication 1769-UM002B-EN-P - July 2005

1769-OF8V Output

Specifications

Specifications A-11

Table A.6 1769-OF8V Specifications

Specification 1769-OF8V

Analog Normal Operating

Ranges

(1)

± 10V dc, 0 to 10V dc, 0 to 5V dc, 1 to 5V dc

Full Scale Analog Ranges

Number of Outputs

input image table can be found in 1769-IF4 Input Data File on page 3-2.

± 10.5V dc, -0.5 to 10.5V dc, -0.5 to 5.25V dc,

0.5 to 5.25V dc

8 single-ended

Bus Current Draw (max.)

Heat Dissipation

Digital Resolution Across Full

Range

145 mA at 5V dc

125 mA at 24V dc

(2)

2.16 Total Watts (All points - 10.5V into 1 k

Ω

- worst case calculated.)

16 bits plus sign (bipolar)

±10V dc: 15.89 bits, 330 µV/bit

0 to +5V dc: 13.89 bits, 330 µV/bit

0 to +10V dc: 14.89 bits, 330 µV/bit

+1 to +5V dc: 13.57 bits, 330 µV/bit

5.0 ms Conversion Rate (all channels) max.

Step Response to 63%

(3)

Current Load Output

Load Range Output

Max. Capacitive Load

Field Calibration

Overall Accuracy

(4)

<2.9 ms

10 mA max.

> 1 k

1 µF

Ω at 10V dc

None required

±0.5% full scale at 25°C

(1)

(2)

If the optional 24V dc Class 2 power supply is used, the 24V dc current draw from the bus is 0 mA.

(3)

Step response is the period of time between when the D/A converter was instructed to go from minimum to full range until the device is at 63% of full range.

(4)

Includes offset, gain, drift, non-linearity and repeatability error terms.

Publication 1769-UM002B-EN-P - July 2005

A-12 Specifications

Specification

Accuracy Drift with

Temperature

Output Ripple

(1) range 0 to 50 kHz

(referred to output range)

1769-OF8V

±0.0086% FS per °C

±0.05%

Non-linearity (in percent full scale)

Repeatability

(2)

(in percent full scale)

±0.05%

Output Error Over Full

Temperature Range

(0 to 60°C [+32 to +140°F])

Output Offset Error

(0 to 60°C [+32 to +140°F])

Output Impedance

±0.8%

±0.05%

Open and Short-Circuit

Protection

Ω

Yes

Maximum Short-Circuit Current 30 mA

Output Overvoltage Protection Yes

Output Response at System

Power Up and Power Down

± 0.5V dc spike for < 5 ms

Rated Working Voltage

(3) 30V ac/30V dc

Output Group to Bus Isolation 500V ac or 710V dc for 1 minute (qualification test)

Module OK LED

30V ac/30V dc working voltage (IEC Class 2 reinforced insulation)

On: module has power, has passed internal diagnostics, and is communicating over the bus.

Flashing: external power failure.

Channel Diagnostics

Off: Any of the above is not true.

Over- or under-range by bit reporting

(1)

Output ripple is the amount a fixed output varies with time, assuming a constant load and temperature.

(2)

Repeatability is the ability of the output module to reproduce output readings when the same controller value is applied to it consecutively, under the same conditions and in the same direction.

(3)

Publication 1769-UM002B-EN-P - July 2005

Appendix

Module Addressing and Configuration with

MicroLogix 1500

This chapter examines the analog modules’ addressing scheme and describes module configuration using RSLogix 500 and MicroLogix 1500.

Input Module Addressing

In the following example, the 1769-IF4 is used. Detailed information on the

slot e

Input Image

6 words

Figure B.1 1769-IF4 Memory Map Including Configuration

Memory Map

Channel 0 Data Word

Channel 1 Data Word

Channel 2 Data Word

Channel 3 Data Word

General Status Bits

Over-/Under-range Bits

Word 0

Word 1

Word 2

Word 3

Word 4, bits 0 to 3

Word 5, bits 0 to 15

Output Image

FIle

Configuration

File

4 words

Channel 0 Configuration Word

Channel 1 Configuration Word

Channel 2 Configuration Word

Channel 3 Configuration Word

Bit 15 Bit 0

Word 0

Word 1

Word 2

Word 3

Refer to your controller manual for the addresses.

slot e

Configuration

File

Publication 1769-UM002B-EN-P - July 2005

B-2 Module Addressing and Configuration with MicroLogix 1500

Input Modules Input Image

The input modules’ input image file represents data words and status bits.

Input words 0 through 3 hold the input data that represents the value of the analog inputs for channels 0 through 3. These data words are valid only when the channel is enabled and there are no errors. Input words 4 and 5 hold the status bits. To receive valid status information, the channel must be enabled.

For example, to obtain the general status of channel 2 of the analog module located in slot 3, use address I:3.4/2.

Slot

Word

Bit

Input File Type

I:3.4/2

Element Delimiter Word Delimiter

Bit Delimiter

TIP

0 1 2

Slot Number

The end cap does not use a slot address.

Publication 1769-UM002B-EN-P - July 2005

Module Addressing and Configuration with MicroLogix 1500 B-3

Input Modules’ Configuration File

The configuration file contains information that you use to define the way a specific channel functions. The configuration file is explained in more detail in chapter 4.

The configuration file is modified using the programming software configuration screen. For an example of module configuration using RSLogix

500, see Configuring Analog I/O Modules in a MicroLogix 1500 System on page B-4.

TIP

The RSLogix 500 configuration default is to enable each analog input channel. For improved analog input module performance, disable any unused channels.

Table B.1 Software Configuration Channel Defaults

1769-IF4 and -IF8

Parameter

Enable/Disable Channel

(1)

Default Setting

Enabled

Filter Selection

Input Range

Data Format

60 Hz

±10V dc

Raw/Proportional

1769-OF2, -OF8C, and -OF8V

Parameter

Enable/Disable Channel

Output Range Selection

Data Format

Default Setting

Enabled

±10V dc

Raw/Proportional

(1)

The 1769-IF4, -IF8, -OF2, -OF8C, and -OF8V modules are disabled by default. You will need to enable the channels.

Publication 1769-UM002B-EN-P - July 2005

B-4 Module Addressing and Configuration with MicroLogix 1500

Configuring Analog I/O

Modules in a MicroLogix

1500 System

This example takes you through configuring your 1769 analog input and output modules with RSLogix 500 programming software. This application example assumes your input and output modules are installed as expansion

I/O in a MicroLogix 1500 system, and that RSLinx™ is properly configured and a communications link has been established between the MicroLogix processor and RSLogix 500.

Start RSLogix and create a MicroLogix 1500 application. The following screen appears:

While offline, double-click on the IO Configuration icon under the controller folder and the following IO Configuration screen appears.

Publication 1769-UM002B-EN-P - July 2005

This screen allows you to manually enter expansion modules into expansion slots, or to automatically read the configuration of the controller. To read the existing controller configuration, click on the Read IO Config button.

Module Addressing and Configuration with MicroLogix 1500 B-5

A communications dialog appears, identifying the current communications configuration so that you can verify the target controller. If the communication settings are correct, click on Read IO Config.

The actual I/O configuration is displayed. In this example, a second tier of

I/O is attached to the MicroLogix 1500 processor.

Publication 1769-UM002B-EN-P - July 2005

B-6 Module Addressing and Configuration with MicroLogix 1500

Configuring the Input Modules

For this example, the 1769-IF4 analog input module is installed in slot 1. To configure the module, double-click on the module/slot.

Analog Input Configuration

Each of the four analog input words (channels) are enabled by default. To enable a channel, click its Enable box so that a check mark appears in it. For optimum module performance, disable any channel that is not hardwired to a real input. Then, choose your Filter Frequency, Input Range, and Data Format for each channel.

Publication 1769-UM002B-EN-P - July 2005

TIP

For maximum noise immunity, choose 50 Hz. For the highest speed (fastest signal detection), choose 250 Hz.

Module Addressing and Configuration with MicroLogix 1500 B-7

Configuring the Output Modules

For this example, the 1769-OF2 analog output module is installed in slot 2. To configure the 1769-OF2, double-click on the module/slot.

The following general configuration screen appears for the 1769-OF2, -OF8C, and -OF8V output modules.

Publication 1769-UM002B-EN-P - July 2005

B-8 Module Addressing and Configuration with MicroLogix 1500

Analog Output Configuration

Both of the output words (channels) are enabled by default. To enable a channel, click its Enable box so that a check mark appears in it. For optimum module performance, disable any channel that is not hardwired to a real input.

Then, choose your Filter Frequency, Input Range, and Data Format for each channel.

Publication 1769-UM002B-EN-P - July 2005

Module Addressing and Configuration with MicroLogix 1500 B-9

Publication 1769-UM002B-EN-P - July 2005

B-10 Module Addressing and Configuration with MicroLogix 1500

Notes:

Publication 1769-UM002B-EN-P - July 2005

Appendix

Configuration Using the RSLogix 5000 Generic

Profile for CompactLogix Controllers

To configure a 1769 analog I/O module for a CompactLogix Controller in

RSLogix 5000 using the Generic Profile, you must first begin a new project in

RSLogix 5000. Click on the new project icon or on the FILE pull down menu and select NEW. The following screen appears:

1 Publication 1769-UM002B-EN-P - July 2005

C-2 Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers

Choose your controller type and enter a name for your project, then click OK.

The following main RSLogix 5000 screen appears:

The last entry in the controller organizer on the left of the screen shown above is a line labeled “[0] CompactBus Local”. Right click on this line, select “New

Module” and the following screen appears:

Publication 1769-UM002B-EN-P - July 2005

Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers C-3

This screen narrows your search for I/O modules to configure into your system. Click the OK button and the following default Generic Profile screen appears:

This is the default Generic Profile screen. The first area to fill in for the

Generic Profile screen is the name. This helps to easily identify the module type configured on your local Compact Bus. The “Description” field is optional and may be used to provide more details concerning this I/O module in your application.

The next parameter to configure is the “Comm Format”. Click the down arrow for this parameter to reveal the choices. For the 1769-OF8C and -OF8V modules, “Data – INT” is used. “Input Data –INT” is used for the 1769-IF8 module.

The slot number must be selected next, even though it begins with the first available slot number, 1, and increments automatically for each subsequent

Generic Profile you configure.

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C-4 Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers

Use the following table for the “Comm Format”, “Assembly Instance” and

“Size” values for the 1769-IF8, -OF8C, and -OF8V modules if you have an earlier version of RSLogix5000, version 15.

1769 I/O

Modules

(1)

Comm Format Parameter

IF8

OF8C and OF8V

Input Data – INT

Data – INT

Input

Output

Config

Input

Output

Config

(1)

1769-OF2 and -IF4 modules do not use the generic profile.

Assembly

Instance

101

100

102

101

100

102

Note the Comm Format, Assembly Instance numbers and their associated sizes for each analog I/O module type and enter them into the Generic

Profile.

Size

(16-bit)

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Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers C-5

At this point, you may click “Finish” to complete the configuration of your

I/O module. If you click “Next”, the following screen appears:

You may choose to inhibit the module or have the controller fault if the connection to this I/O module fails. The defaults for these two parameters are not to inhibit the module and not to fault the controller should an I/O module connection fail.

TIP

Refer to the Help screens in RSLogix 5000, under

“Connection Tab Overview” for a complete explanation of these features.

You may now click “Finish” to complete the configuration of your analog output module. If you click “Next”, you will see the Module Information screen, which is only filled in when you are online with your controller. If you clicked “Next” to get the Module Information screen, click “Finish” to complete the configuration of your I/O module.

Configure each analog I/O module in this manner.

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C-6 Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers

Configuring I/O Modules

Once you have created Generic Profiles for each analog I/O module in your system, you must then enter configuration information into the Tag database that has been automatically created from the Generic Profile information you entered for each of these modules. This configuration information is downloaded to each module at program download, going to run, and at power up.

This section shows how and where to enter configuration data for each analog

I/O module, once Generic Profiles have been created for them.

You must first enter the Controller Tag database, by double-clicking on

“Controller Tags” in the upper portion of the controller organizer. The example to follow demonstrates entering configuration data for 1769-OF2 and

-IF4 modules.

For demonstration purposes, Generic Profiles have been created for 1769-IF8,

-OF8C, and -OF8V modules. The Controller Tags screen looks like the following:

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Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers C-7

Tag addresses are automatically created for configured I/O modules. All local

I/O addresses are preceded by the word Local. These addresses have the following format:

• Input Data: Local:s.I

• Output Data: Local:s.O

• Configuration Data: Local:s.C

where s is the slot number assigned the I/O modules in the Generic

Profiles.

In order to configure an I/O module, you must open up the configuration tag for that module by clicking on the plus sign to the left of its configuration tag in the tag data base.

Configuring Analog Output Modules

To configure the 1769-OF8C or -OF8V module in slot 1, click on the plus sign left of Local:1.C. Configuration data is entered under the Local:1.C.Data tag. Click the plus sign to the left of Local:1.C.Data to reveal the 8 integer data words where configuration data may be entered for the 1769-OF8C or -OF8V module.

Configuring Analog Input Modules

To configure the input modules in slot 2, click on the plus sign left of

Local:2.C. Click on the plus sign to the left of Local:2.C.Data to reveal the 4 integer data words where the configuration data may be entered for the module. The tag addresses for these 4 words are Local:2.C.Data[0] through

Local:2.C.Data[3].

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C-8 Configuration Using the RSLogix 5000 Generic Profile for CompactLogix Controllers

Notes:

Publication 1769-UM002B-EN-P - July 2005

Overview

Appendix

Configuring Modules in a Remote DeviceNet

System with a 1769-ADN DeviceNet Adapter

In this example, the 1769-IF4 and 1769-OF8C modules are in a remote

DeviceNet system controlled by a 1769-ADN DeviceNet adapter.

RSNetWorx for DeviceNet software, version 2.23 or later, is used to configure the network and the I/O modules.

The configuration method described here must be done prior to configuring the DeviceNet adapter in the DeviceNet scanner’s scanlist. This applies if you are configuring an I/O module offline, then downloading to the adapter, or if you do the configuration online. After the adapter is placed in the scanner’s scanlist, you can only configure or re-configure the I/O module using explicit messages or by removing the adapter from the scanner’s scanlist, modifying the configuration of the I/O module, and then adding the adapter back into the scanner’s scanlist.

For additional information on configuring DeviceNet scanners and adapters, refer to the documentation for those products. The DeviceNet Adapter User

Manual, publication 1769-UM001, contains examples on modifying I/O module configurations with explicit messages while the system is running.

IMPORTANT

You must use a Series B 1769-ADN adapter with the

1769-IF8, -OF8C, and -OF8V modules.

TIP

After setting up each slot, be sure to choose Apply.

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D-2 Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Add the DeviceNet Adapter to the Scanlist

In this part of the example, the 1769-ADN adapter is added to the DeviceNet scanner’s scanlist.

Start the RSNetWorx for DeviceNet software.

In the left column under Category, click the + sign next to

Communication Adapters.

In the list of products, double-click the 1769-ADN to place it on the network.

Publication 1769-UM002B-EN-P - July 2005

TIP

If 1769-ADN is not an option, you have an earlier version of RSNetWorx for DeviceNet software.

Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter D-3

To configure I/O for the adapter, double-click the adapter icon that appears on the network.

Click the Module Configuration tab.

TIP

The I/O Summary tab provides the configured sized and format of the I/O data.

The Transaction tab lets you send services supported by the device. The Clear/Reset Memory transaction returns the module’s configuration to the factory defaults, that is, empty. This operation cannot be undone.

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D-4 Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Configure the 1769-IF4 Input

Module Example

The 1769-ADN adapter appears in slot 0. Your I/O modules, power supplies, end caps, and interconnect cables must be entered in the proper order, following the 1769 I/O rules contained in the DeviceNet Adapter User

Manual, publication 1769-UM001A. To simplify this example, we placed the

1769-IF4 in slot 1 to show how it is configured.

To place the input module into slot 1, click Module Configuration.

A list of all possible 1769 products appears.

Select the 1769-IF4/B.

Slot 1 appears to the right of the 1769-IF4.

Under the General tab, select the appropriate bank.

Bank 1 was selected in this example.

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Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter D-5

Double-click this slot 1 box.

By default, the 1769-IF4 module contains six input words and no output words.

Click the Data Description button to see what the six input words represent.

The first four words are the actual analog input data, while the last two words contain status and over- and under-range bits for the four channels.

Click OK or Cancel to exit this screen and return to the Configuration screen.

If your application requires only four data words and not the status information, click the Set for I/O only button

The input size changes to four words. The revision number for the series B 1769-IF4 module is two. With this setting, you may leave the electronic keying to Exact Match. It is not recommended to disable keying, but if you are not sure of the exact revision of your module, selecting Compatible Module allows your system to operate, while still requiring a 1769-IF4 module in slot 1.

The series B 1769-IF4 module differs from the series A module only in that it allows external 24V dc power. The external power connection allows you to draw 24V dc power for the module from your external source, should your 1769 power supply not provide enough 24V dc power for your particular set of 1769 I/O modules.

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D-6 Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

If you are using external 24V dc power for your 1769-IF4 module, you must click the white box to the left of “Using External +24v Power

Source”, so that a check mark appears in the box. Do not click on the box if you are not using external 24V dc power.

Each of the four analog input channels are disabled by default. To enable a channel, click its Enable box, so that a check mark appears in it.

Then, choose your Filter frequency, Input Range, and Data Format for each channel. See chapter 4 of this manual for a complete description of each of these configuration categories.

1769-IF4 Example of External Power

In this example, channels 0 through 4 are used and external power is being supplied from an external 24V dc power source. In addition, channels 0 and 1 are driven by 4 to 20 mA transducers, while channels 2 and 3 are driven by devices generating 0 to 10V dc analog signals.

Throughput is not a concern for this application. However, noise immunity is.

Therefore, the filter frequency for maximum noise immunity, 50 Hz, has been chosen. The analog input on channel 0 is used as the PV (input) value for a

PID loop. Therefore, the Data Format for this channel is Scaled-for-PID.

Channels 1 through 3 are not being used with a PID loop and have been configured for the Raw/Proportional Data Format for maximum resolution.

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Click OK, and your configuration for the 1769-IF4 analog input module is complete.

Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter D-7

Configure the 1769-OF8C

Output Module Example

After leaving the 1769-IF4 configuration screen, the I/O Bank 1 screen for the

1769-ADN adapter should look like the following:

Just as you did for the 1769-IF4 module, click on the drop-down arrow next to the empty slot and this time choose the 1769-OF8C.

Click on the Slot 2 button that appears to the right of the 1769-OF8C module.

By default, the 1769-OF8C module contains eleven input words and nine output words.

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D-8 Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Click on the Configuration Settings button to see what the eleven input and nine output words represent.

The eleven input words contain channel diagnostic data for the eight channels. The nine output words contain the actual analog output data for the eight channels along with one additional word containing the control bits for unlatching alarms.

Click OK or Cancel to exit this screen and return to the Configuration screen.

Select No Input Data under Input Data Size if your application requires only the data words and not the status information.

The Input Size changes to 0, while the Output Size remains at nine words. The Revision number for the series B 1769-OF8C module is two. With this, you may leave the Electronic Keying to Exact Match. It is not recommended to disable keying, but if you are unsure of the exact revision of your module, selecting Compatible Module allows your system to operate, while still requiring a 1769-OF8C module in slot 2.

1769-OF8C Example of External Power

The series B 1769-OF8C module differs from the series A module only in that it allows external 24V dc power. The external power connection allows you to draw 24V dc power for the module from your external source, should your

1769 power supply not provide enough 24V dc power for your particular set of 1769 I/O modules.

If you are using external 24V dc power for your 1769-OF8C module, you must click the white box to the left of “Using External +24v Power Source”, so that a check mark appears in the box. Do not click on the box if you are not using external 24V dc power.

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Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter D-9

1769-OF8C Example of Output Channels

Each of the two analog output channels are disabled by default. To enabled a channel, click its Enable box so that a check mark appears in it. Then, choose your Output Range, Data Format, and the state or your outputs should the controlling processor be placed into the program mode, fault, or lose communications.

Program State and Fault State each have two options:

• Hold Last State

Hold last state will hold the analog output at the last value received before the processor was placed in program mode or before it faulted.

• User-defined State

When selecting user-defined state, you must specify a value for the analog output to revert to should the processor be placed in program mode or fault. The values used for user-defined state must be valid values determined by the selected Data Format and Output Range. If communications fail, you may also choose whether your Program State or Fault State options take place for each channel.

In this example, channels 0 and 1 are enabled and configured for 4 to 20 mA

Output Ranges. The Data Format for channel 0 is Scaled-for-PID, because it is the CV (output) value from your PID instruction. Hold last state was chosen for all possible conditions other than Run mode for channel 0.

Channel 1 is also enabled and configured for 4 to 20 mA Output Range.

Raw/Proportional Data Format was chosen for maximum resolution. In addition, a requirement of the system is that this analog output must always be at 4 mA if the system is not in control of it.

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D-10 Configuring Modules in a Remote DeviceNet System with a 1769-ADN DeviceNet Adapter

Therefore, a value of 6241 (decimal) must be used in the event the controlling processor is placed into program mode, faults, or loses communications. The decimal number 6241 represents 4 mA, when using the Raw/Proportional

Data Format.

Click OK, and your configuration for the 1769-OF8C analog output module is complete.

Publication 1769-UM002B-EN-P - July 2005

IMPORTANT

Be sure to add appropriate power supplies and end caps.

Two’s Complement Binary Numbers

Appendix

The processor memory stores 16-bit binary numbers. Two’s complement binary is used when performing mathematical calculations internal to the processor. Analog input values from the analog modules are returned to the processor in 16-bit two’s complement binary format. For positive numbers, the binary notation and two’s complement binary notation are identical.

As indicated in the figure on the next page, each position in the number has a decimal value, beginning at the right with 2

0 and ending at the left with 2

Each position can be 0 or 1 in the processor memory. A 0 indicates a value of

0; a 1 indicates the decimal value of the position. The equivalent decimal value of the binary number is the sum of the position values.

Positive Decimal Values

The far left position is always 0 for positive values. This limits the maximum positive decimal value to 32767 (all positions are 1 except the far left position).

Figure E.1 Positive Decimal Values

32767

128

16384

8192

4096

2048

1024

512

256

0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

This position is always 0 for positive numbers.

EXAMPLE

0000 1001 0000 1110 = 2

11+

2048+256+8+4+2 = 2318

0010 0011 0010 1000 = 2

13+

8192+512+256+32+8 = 9000

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E-2 Two’s Complement Binary Numbers

Negative Decimal Values

In two’s complement notation, the far left position is always 1 for negative values. The equivalent decimal value of the binary number is obtained by subtracting the value of the far left position, 32768, from the sum of the values

of the other positions. In Figure E.2 all positions are 1 and the value is 32767 -

32768 = -1.

Figure E.2 Negative Decimal Values

16384

8192

4096

2048

1024

512

256

128

32767

1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

This position is always 1 for negative numbers.

EXAMPLE 1111 1000 0010 0011 = (2

14+

13+

12+

11+

) - 2

(16384+8192+4096+2048+32+2+1) - 32768 =

30755 - 32768 = -2013

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Glossary

The following terms and abbreviations are used throughout this manual. For definitions of terms not listed here refer to Allen-Bradley’s Industrial Automation

Glossary , Publication AG-7.1

A/D Converter – Refers to the analog to digital converter inherent to the module. The converter produces a digital value whose magnitude is proportional to the magnitude of an analog input signal.

alternate last state – A configuration selection that instructs the module to convert a user-specified value from the channel fault or program/idle word to the output value when the module enters the fault or program mode.

analog input module – A module that contains circuits that convert analog voltage or current input signals to digital values that can be manipulated by the processor.

attenuation – The reduction in the magnitude of a signal as it passes through a system. bus connector – A 16-pin male and female connector that provides electrical interconnection between the modules.

channel – Refers to analog input or output interfaces available on the module’s terminal block. Each channel is configured for connection to a variable voltage or current input or output device, and has its own data and diagnostic status words.

channel update time – The time required for the module to sample and convert the input signals of one enabled input channel and update the channel data word.

common mode rejection – For analog inputs, the maximum level to which a common mode input voltage appears in the numerical value read by the processor, expressed in dB.

common mode rejection ratio – The ratio of a device’s differential voltage gain to common mode voltage gain. Expressed in dB, CMRR is a comparative measure of a device’s ability to reject interference caused by a voltage common to its input terminals relative to ground. CMRR=20 Log

10 (V1/V2) common mode voltage – For analog inputs, the voltage difference between the negative terminal and analog common during normal differential operation.

common mode voltage range – For analog inputs, the largest voltage difference allowed between either the positive or negative terminal and analog common during normal differential operation.

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Publication 1769-UM002B-EN-P - July 2005 configuration word – Contains the channel configuration information needed by the module to configure and operate each channel.

D/A Converter – Refers to the digital to analog converter inherent to the output module. The converter produces an analog dc voltage or current signal whose instantaneous magnitude is proportional to the magnitude of a digital value.

dB – (decibel) A logarithmic measure of the ratio of two signal levels.

data echo – The analog value currently being converted by the D/A converter and shown in words 2 and 3 of the output module’s input data file. Under normal operating conditions, the data echo value is the same value that is being sent from the bus master to the output module.

data word – A 16-bit integer that represents the value of the analog input or output channel. The channel data word is valid only when the channel is enabled and there are no channel errors. When the channel is disabled the channel data word is cleared (0).

differential operation – The difference in voltage between a channel’s positive terminal and negative terminal.

digital filter – A low-pass filter incorporated into the A/D converter. The digital filter provides very steep roll-off above it’s cut-off frequency, which provides high frequency noise rejection.

filter – A device that passes a signal or range of signals and eliminates all others.

filter frequency – (-3 dB frequency) The user-selectable frequency.

full scale – The magnitude of voltage or current over which normal operation is permitted.

full scale error – (gain error) The difference in slope between the actual and ideal analog transfer functions.

full scale range – (FSR) The difference between the maximum and minimum specified analog input values.

hold last state – A configuration selection that instructs the module to keep the outputs at the last converted value prior to the condition that caused the control system to enter the fault or program mode.

input image – The input from the module to the controller. The input image contains the module data words and status bits.

LSB – (Least Significant Bit) The bit that represents the smallest value within a string of bits. For analog modules, 16-bit, two’s complement binary codes are used in the I/O image in the card.

For analog inputs, the LSB is defined as the rightmost bit, bit 0, of the 16-bit field. For analog outputs, the three rightmost bits are not significant, and the

LSB is defined as the third bit from the right, bit 2, of the 16-bit field.

linearity error – An analog input or output is composed of a series of voltage or current values corresponding to digital codes. For an ideal analog input or output, the values lie in a straight line spaced by a voltage or current corresponding to 1 LSB. Any deviation of the converted input or actual output from this line is the linearity error of the input or output. The linearity is expressed in percent of full scale input or output. See the variation from the straight line due to linearity error (exaggerated) in the example below.

Actual Transfer

Function

Ideal Transfer number of significant bits – The power of two that represents the total number of completely different digital codes an analog signal can be converted into or generated from.

module scan time – same as module update time module update time – For input modules, the time required for the module to sample and convert the input signals of all enabled input channels and make the resulting data values available to the processor. For output modules, the time required for the module to receive the digital code from the processor, convert it to the analog output signal, and send it to the output channel.

multiplexer – An switching system that allows several signals to share a common A/D or D/A converter.

normal mode rejection – (differential mode rejection) A logarithmic measure, in dB, of a device’s ability to reject noise signals between or among circuit signal conductors.

normal operating range – Input or output signals are within the configured

range. See page 1-2 for a list of input and output types/ranges.

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4 overall accuracy – The worst-case deviation of the output voltage or current from the ideal over the full output range is the overall accuracy. For inputs, the worst-case deviation of the digital representation of the input signal from the ideal over the full input range is the overall accuracy. this is expressed in percent of full scale.

Gain error, offset error, and linearity error all contribute to input and output channel accuracy.

output accuracy – The difference between the actual analog output value and what is expected, when a given digital code is applied to the d/a converter. Expressed as a ± percent of full scale. The error will include gain, offset and drift elements, and is defined at 25°C, and also over the full operating temperature range (0 to 60°C).

output image – The output from the controller to the output module. The output image contains the analog output data. analog output module – An I/O module that contains circuits that output an analog dc voltage or current signal proportional to a digital value transferred to the module from the processor.

repeatability – The closeness of agreement among repeated measurements of the same variable under the same conditions.

resolution – The smallest detectable change in a measurement, typically expressed in engineering units (e.g. 1 mV) or as a number of bits. For example a 12-bit system has 4096 possible output states. It can therefore measure 1 part in 4096.

status word – Contains status information about the channel’s current configuration and operational state. You can use this information in your ladder program to determine whether the channel data word is valid.

step response time – For inputs, this is the time required for the channel data word signal to reach a specified percentage of its expected final value, given a large step change in the input signal.

update time – see “module update time”

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Index

Numerics

1769-ADN configuration example

D-1–D-10

user manual Preface-2

-3 dB frequency 3-7, 3-24

A

A/D

definition

abbreviations

alarm deadband

alarms process alarm analog input data

3-30

3-3, 3-18

analog input module definition

overview

attenuation cut-off frequency

3-7

definition

3-8, 3-24 channel scan time 3-8, 3-24

B

bus connector definition

bus interface

C

channel definition

channel diagnostics

5-3

channel reconfiguration time

channel status LED

1-6

channel step response

channel switching time

3-8, 3-24

channel update time definition

CMRR. See common mode rejection ratio

common mode rejection 3-6, 3-23, A-3

definition

common mode rejection ratio definition

common mode voltage

definition

common mode voltage rating 3-6, 3-23

common mode voltage range

definition 1-1

specification A-3

configuration errors

5-6

configuration word

1769-OF2

contacting Rockwell Automation

current draw

1769-OF2

cut-off frequency

3-7, 3-24

D

D/A converter

data echo

data loopback

E

electrical noise

EMC Directive

2-4

2-1

end cap terminator

2-6

error codes

5-6

error definitions 5-4

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2 Index errors

configuration

5-6

critical

5-4

extended error information field

module error field

European Union Directives

2-1

extended error codes 5-6

extended error information field

5-5

external power switch 2-10

F

fault condition at power-up

fault value

filter

and channel step response and channel update time

definition 1-2

finger-safe terminal block 2-16

3-7, 3-24

frequency

cut-off frequency 3-7, 3-24 response graphs 3-7, 3-24

FSR. See full scale range.

full scale

full scale error

full scale range

1769-IF4 specifications

1769-OF2 specifications

A-3

A-7

definition 1-2

G

gain error. See full scale error.

generic profile

configuration example

C-1

grounding

2-10

H

hardware errors

5-5

heat considerations

hold last state

program/idle mode

I

inhibit function

5-12

input data file

4-2, 4-19

input data formats engineering units percent range

3-10, 3-28

3-10, 3-28 raw/proportional data 3-10, 3-27

scaled for PID

3-10, 3-28

valid formats/ranges

3-11, 3-28

input filter selection

input image

definition

1-2

input module

channel configuration

3-5, 3-22

enable channel

general status bits 3-3, 3-18

input module status

over-range flag bits

3-3, 3-19

under-range flag bits

3-3, 3-19

input type/range selection 3-9, 3-27

installation

2-1–2-9

grounding

2-10

heat and noise considerations

2-4

L

least significant bit. See LSB.

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Index 3

M

module error field

5-5

module inhibit function

5-12

module scan time

definition 1-3

module update time 3-8, 3-24

mounting

multiplexer

multiplexing

N

negative decimal values

E-2

noise rejection