Rockwell Automation 1794-OF8IH User Manual

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FLEX I/O Isolated Input/Output HART Analog Modules

Catalog Numbers 1794-IF8IH and1794-OF8IH User Manual

Important User Information

WARNING

IMPORTANT

ATTENTION

SHOCK HAZARD

BURN HAZARD

Solid state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1

http://literature.rockwellautomation.com

) describes some important differences between solid state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

available from your local Rockwell Automation sales office or online at

Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

Identifies information that is critical for successful application and understanding of the product.

Identifies information about practices or circumstances that can lead to: personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

Labels may be on or inside the equipment, such as a drive or motor, to alert people that dangerous voltage may be present.

Labels may be on or inside the equipment, such as a drive or motor, to alert people that surfaces may reach dangerous temperatures.

Allen-Bradley, Rockwell Automation, FLEX I/O, RSLogix, RSLinx, RSLogix 5000 and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Summary of Changes

This manual contains new and updated information. Changes throughout this revision are marked by change bars, as shown to the right of this paragraph.

New and Updated Information

This table contains the changes made to this revision.

Topic Page

Overview 1 Communicate with Programmable Controllers 2 Events Following Power-up 2 Use Alarms on the Input Module 3 Remote Fault Alarm 4 Programming the Remote Fault Alarm 5 Configurable FLEX I/O Analog Module Features 7 Data Format 9 Install the Terminal Base Unit 16 Mount the Analog Modules on the Terminal Base Unit 21 Connections for the 1794-IF8IH HART Analog Input Module

on a 1794-TB3 Terminal Base Unit Connections for the 1794-OF8IH HART Analog Output Module

on a 1794-TB3 or 1794-TB3S Terminal Base Unit Ground the Module 24 About the ControlNet and EtherNet Adapters 26 Communication Over the FLEX I/O Backplane 26 I/O Structure 28

Fault State Data 28 Data Transfer Types 31 Interpret the Status Indicators 57 Use the 1794-IF8IH Module with the Generic Profile 119 Use the 1794-OF8IH Module with the Generic Profile 133

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iv Summary of Changes

Notes:

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Preface

Why Read This Manual

Who Should Use This Manual

About the Vocabulary

This manual shows you how to use your FLEX I/O analog modules with the ControlNet products and ControlNet network, and EtherNet products and EtherNet network. The manual helps you install, program, and troubleshoot your module. This manual:

You must be able to program and operate a ControlNet product and ControlNet or Ethernet network to make efficient use of a FLEX I/O module.

In this manual, we refer to the:

• 1794-IF8IH as the input module

• 1794-OF8IH as the output module

Overview

This chapter describes the FLEX I/O Highway Addressable Remote Transducer (HART) analog modules and what you must know and do before you begin to use them.

Read this chapter to familiarize yourself with the HART analog modules.

Topic Page

What FLEX I/O Analog Modules Do 1 Communicate with Programmable Controllers 2 Use Alarms on the Input Module 3 Use the HART Capabilities 6 HART Implementation Overview 6 Chapter Summary 6

To use all of the features of this module it must be used with the 1794-ACN(R)15 with version 5.1 firmware or later, or the 1794-AENT with version 4.2 firmware or later.

For more information about using this module with 1794-ACN(R)15 with version 5.1 (or greater) firmware, see 1794-RN071

What FLEX I/O Analog Modules Do

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The FLEX I/O HART input and output modules must be used in a ControlNet or EtherNet network.

The 1794-IF8IH module accepts up to 8 analog inputs. The inputs are isolated and will accept current in either of the following two ranges: 4…20 mA or 0…20 mA. The default input range is 0…20 mA. The inputs have both fixed hardware filters and selectable firmware digital filters.

Similarly, the 1794-OF8IH module provides as many as 8 analog outputs. The outputs are isolated and will provide current in either of the following two ranges: 4…20 mA or 0…20 mA. The default output range is 0…20 mA.

Each module offers:

• local microprocessor intelligence for advanced features.

• full functionality without switches or jumpers.

2 About the FLEX I/O HART Analog Module

• multiple data ranges that can be independently programmed for each channel.

• lead breakage detection.

• overrange/underrange alarms.

• remote transmitter alarm.

Communicate with Programmable Controllers

Data connections are established between the FLEX I/O module and an Allen-Bradley programmable controller (PLC) to transfer information between the two at a scheduled rate.

Input module information is then automatically made available in the PLC data table through the data connection. Reciprocally, output data information determined by the PLC program is also automatically transferred from the PLC data table to the output module through the data connection.

In addition, when the data connection is originally established, configuration information for the module is automatically transferred to it via the network.

Events Following Power-up

You must apply +24V DC power to your FLEX I/O analog I/O modules. The following sequence of events occurs after power has initially been applied to your module:

1. The module status indicator will blink red until a connection is established and a valid configuration is passed to the module.

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2. After the diagnostic check, module configuration information, selected by the user and downloaded over the network, is applied by the module. For more information on configuration options, refer to Configurable FLEX I/O Analog Module Features.

3. Following the module configuration download for the 1794-IF8IH module, the module begins producing runtime data for the PLC processor.

Following the module configuration download for the 1794-OF8IH module, the module applies configuration data to output channels.

4. If any diagnostics or alarms are generated during normal module operation, the data is returned to the PLC processor.

About the FLEX I/O HART Analog Module 3

Module type

Removable label

Keyswitch position indicator (#3) Power On indicator

Input designators

44811

Physical Features of Your Module

The module label identifies the keyswitch position, wiring and module type. Use the removable label to note individual designations per your application.

Indicators

Indicators are provided to identify input or output fault conditions, and to show when power is applied to the module. For example, the 1794-IF8IH module is shown below.

8 CH HART ISOLATED ANALOG INPUT

IN1IN0 IN2 IN3 IN4

IN5

1794-IF8IH

IN6 IN7

PWR

Use Alarms on the Input Module

The 1794-IF8IH FLEX I/O module is capable of generating four alarms:

•Underrange

•Overrange

•Remote Fault

•Local Fault

These alarm conditions are described in general terms and as they relate to bits on the FLEX I/O module on the following pages. The following graphic shows at what values these alarms are generated for 4…20 mA 1000/mA range.

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4 About the FLEX I/O HART Analog Module

0 mA 4 mA 20 mA 22 mA

Remote Fault

Local Fault

Underrange Overrange

Programmable in 20 0.1 mA steps by Error Level 0.1 mA Steps parameter

-12.50%

0.00%

-25.00%

Programmable in 20 0.1 mA steps by Error Level 0.1 mA Steps parameter

100.00% 112.50%

45149

Data Format Alarm Example

In this example, the normal active data range is 4…20 mA. The alarms are generated in three overlapping bands.

Physical Input Signal Ranges

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Overrange Alarm

The overrange alarm notifies you when module input is overrange. When the input signal exceeds 100% (20 mA), an Overrange Alarm is generated.

This alarm stays active at any value above 100% of range and is always enabled by the module.

Underrange Alarm

The underrange alarm works converse to the overrange. This feature notifies you when the input signal falls underrange. If the input signal falls below 0% (4 mA), an Underrange Alarm is generated.

This alarm stays active at any value below 0% of range and is always enabled by the module.

Remote Fault Alarm

The remote fault alarm is intended for use with remote transmitter loops.

For example, the remote transmitter may be measuring temperature and converting it to a standard mA signal. In such a loop, though, the input module cannot determine the state of the loop on the far side of the transmitter.

About the FLEX I/O HART Analog Module 5

IMPORTANT

However, the remote transmitter may be capable of diagnosing a problem in the remote loop and signal the input module local loop with a preprogrammed out of range (high or low) value.

The Fault Enable bit allows the 1794-IF8IH module to work with transmitters like the one just described.

Once the alarm is issued, it remains active as long as the input signal value remains above the programmed value.

Use Remote Fault Alarm to Determine High-High or Low-Low Alarm Levels

If you do not have a remote transmitter in your loop, this alarm can also be used to program a high-high or low-low alarm level between the levels which actuate the overrange or underrange alarms and the high or low local fault alarms.

Programming the Remote Fault Alarm

For the remote fault alarm, you must program the threshold in 0.1 mA steps at any level on the high or low end of input signal range. The remote fault alarm activates if your I/O module receives input signal values of:

• 100.63…111.88% (20.1…21.9 mA) on the high end of input signal range

• -0.63…-11.88% (3.9…2.1 mA) on the low end of input signal range.

Local Fault Alarm

The local fault alarm notifies you when the loop to the transmitter or field device, if no transmitter is used, is open or shorted.

Once the alarm is issued, it remains active as long as the input signal value remains in the programmed range.

• 112.50% (22 mA) or higher on the high end of input signal range.

This value indicates a short in the loop.

• -12.50% (2 mA) or lower on the low end of input signal range.

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6 About the FLEX I/O HART Analog Module

Processor

User program

Adapter FLEX I/O

HART module

HART Field Device

Command

Response

for example, HART Command 3)

Flexbus

4…20 mA with HART signal

This value indicates an open wire condition in the loop.

The remote fault and local fault alarms are issued with the same bit whether the cause is an under or overrange. Monitor the overrange and underrange bits in your programming software to determine if the problem is a high current or low current.

Use the HART Capabilities

HART Implementation Overview

Before using the HART capabilities, be sure that:

• the I/O module and the associated field device are working properly in the analog 4 to 20 mA mode.

• the I/O module is configured for 4 to 20 mA range.

• the field device is HART capable.

• no more than one HART field device is connected to each channel.

• input filtering is set to a valid (defined) value.

The FLEX I/O HART modules act as intelligent HART multiplexers. Basically, the module learns which HART devices are attached to its channels and then routes HART messages, as appropriate, between the HART field devices and the flexbus. Since the HART modules act as intelligent HART multiplexers, HART commands can be issued to the HART modules themselves.

Communication on the flexbus occurs between the adapter and the HART module. The adapter converts these messages to the appropriate network format for communication with the controlling processor. The controlling processor gets its command from the user program, storing the responses in its memory.

Chapter Summary

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In this chapter, you learned about FLEX I/O analog I/O modules and HART module capabilities. Read the next chapter to learn about configurable features on your module.

Chapter

IMPORTANT

Configurable FLEX I/O Analog Module Features

Overview

Read this chapter to familiarize yourself with configurable features on the input and output analog modules

Topic Page

Select Your Analog Input Module Operating Features

Select Your Analog Output Module Operating Features

Understand Image Table Mapping and Bit/Word Descriptions

Chapter Summary 14

HART configurable features described in this chapter include the following

Analog/Digital Configurable Features on FLEX I/O Analog I/O Modules

1794-IF8IH Input Module 1794-OF8IH Output Module

Fault Mode Output Enable High Low Error Level Module Fault State Mode Input Filter Cutoff Local Fault Mode Data Format Data Format

Global Reset

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Analog Fault State Latch Retry Mode Fault Alarm

You must use the I/O configuration portion of your PLC programming software to select and configure these features. This manual assumes familiarity with the programming software. A brief description of each module feature is provided here. For more information on your programming software, refer to the software user manual.

8 Configurable FLEX I/O Analog Module Features

IMPORTANT

Select Your Analog Input Module Operating Features

All features of the 1794-IF8IH analog input module are independently configurable.

The default selection value for all parameters is 0.

Fault Enable

Your input modules are capable of indicating various fault conditions, depending on the input signal value. Use the Fault Enable feature to enable or disable two alarms:

•Remote Fault Alarm

•Local Fault Mode

Use your programming software to set the Fault Enable bit to 0 to disable these alarms. Set the bit to 1 to enable them.

Fault Enable will only enable or disable the Remote and Local Fault alarms. It does not affect the Underrange and Overrange alarms. They are always active.

For more information refer to Remote Fault Alarm and Local Fault Alarm.

Input Filter Cutoff

Six available input filter settings allow you to choose the best rolloff frequency for input channels on your I/O module. When choosing a filter, remember that time filter selection affects your input signal’s accuracy.

For example, if you choose the highest frequency of 470 Hz (filter 0), signal noise is more likely to affect the reading, but the slowest frequency of 4.17 Hz (filter 5) provides the most accurate signal due to incoming noise filtering.

Refer to the Input Filter Frequency table to decide which input filter to use in your FLEX I/O analog I/O application:

Input Filter Frequency

01234567

470 Hz 62 Hz 19.6 Hz 16.7 Hz 10 Hz 4.17 Hz n/a n/a

Choose the best input filter cutoff in your programming software.

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Configurable FLEX I/O Analog Module Features 9

input

(

)

Datatable = 10000

√

input

IF...Square_Root_Threshold

< 10000

√

input

Else...datatable = 0

input

(

)

Datatable = 65535

input-4

(

)

Datatable = 10000

√

IF...Square_Root_Threshold

< 10000

√

Else...datatable = 0

input-4

Data Format

You must choose a module data format in your user program. Formats 8, 9, 10 and 15 are not used. If they are selected for a channel quad, a configuration fault will occur and will be reported as Diagnostic Data 2. All data for that channel quad will be set to zero (0).

Formats 5, 12, 13 and 14 are 2’s complement data formats, and will return data in that form.

12 Formats are available

1794-IF8IH Data Formats

Data Format

0 0…20 mA

1 0…20 mA

2 0…20 mA

3 0…20 mA

4 4…20 mA

5 4…20 mA

Format Resolution Input

as mA

as %

as √%

as unsigned integer

as mA

as %

0.1 % of 0…20 mA

0.2 % of 0…20 mA

0.19 % of 0…20 mA

0.03 % of 0…20 mA

0.1 % of 4…20 mA

0.16 % of 4…20 mA

Default format is 0

The data format selected interprets input readings and returns them to the PLC.

Module Data Processing Data Table Value

Range

0…22 mA Datatable = 1000 (input) 0…22000

0…22 mA 0…11000

0…22 mA 0…10488

0…20 mA 0…65535

2…22 mA Datatable = 1000 (input) 2000…22000

2…22 mA -1250…+11250

…20 mA

(Interpretation)

(0…22.000 mA)

(0…110.00%)

(0…104.88%)

(0…22 mA)

(2.000…22.000 mA)

(2’s complement) (-12.50%…+112.5 0%)

Count per mA

1000 With

500

524

3276

1000

625 With

Error Steps

error steps

6 4…20 mA

as √%

0.17 % of 4…20 mA

4…22 mA 0…10607

(0…106.07%)

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With error steps, under-r ange not allowed

10 Configurable FLEX I/O Analog Module Features

input-4

(

)

Datatable = 65535

input

(

)

Datatable = 55000

input-4

(

)

Datatable = 10000

input-4

(

)

Datatable = 10000

input-4

(

)

Datatable = 10000

IMPORTANT

1794-IF8IH Data Formats

Data Format

7 4…20 mA

8 Not assigned 9 10 11 0…20 mA

12 4…20 mA

13 4…20mA

14 4…20 mA

15 Not assigned

Format Resolution Input

as unsigned integer

as A/D count

as %

0.03% of 4…20 mA

0.04% of 0…20 mA

0.16% of 4…20 mA

Module Data Processing Data Table Value

Range

0…22 mA 0…55000

3.6…21 mA -250 … +10625

3…21 mA -625 … +10625

2…22 mA -1250 … +11250

(Interpretation)

0…65535 (4…20 mA)

(0…22 mA)

(2’s complement) (-2.50…+106.25%)

(2’s complement) (-6.25…+106.25%)

(2’s complement) (-12.50…+112.50 %)

Count per mA

4095 With

2500 All

625 NAMU

Error Steps

error steps

fixed

R NE 4 all fixed

All fixed

Select Your Analog Output Module Operating Features

All features of the 1794-OF8IH analog output module are independently configurable.

The default selection value for all parameters is 0.

Local Fault Mode

The Local Fault Mode can be programmed to determine how the module responds to communications faults and internal module faults.

When setting the Local Fault Mode feature in your programming software, set this feature’s bit to 0 to use the analog fault state or digital fault state only if a communications fault occurs. Set the bit to 1 to use the Analog Fault state or Digital Fault state if any fault occurs.

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Configurable FLEX I/O Analog Module Features 11

Latch Mode

Latch Mode determines channel operation under wire-off or lead-break fault conditions. This feature is available for each channel. Channel detection occurs on a continuous basis. If a fault is detected, the channel fault alarm is set.

If Latch mode is enabled when a fault occurs, the fault will remain latched in its fault state until a Global Reset (see below) is issued. If Latch mode is disabled when a fault occurs, the channel reports a fault until the fault is corrected. Global Reset is not necessary if Latch mode is disabled.

When using your programming software, set the Latch mode bit to 0 to disable the feature. Set the bit to 1 to enable it.

Global Reset

Global Reset works in conjunction with Latch mode during fault conditions. If Latch mode is enabled and a fault condition occurs, the channel operating with a fault remains in this condition (with analog or digital fault state implied) until a Global Reset is issued. The Global Reset feature resets all outputs of a particular channel group to accept normal system output data.

The Global Reset feature is an edge triggered signal. Use your programming software to set the Global Reset bit to 1 for normal operation. Resetting of outputs occurs during the 1 to 0 transition.

Data Format

You must choose a module data format in your user program. Refer to 1794-OF8IH Data Formats for an explanation of each bit. Data Formats 2, 5, 6, 8, 9, 10, 11, 12, 13 and 15 are not assigned.

When choosing a data format, remember the following:

• If an unassigned Analog Data Format is selected, the module sets Diagnostic Data to 2 for configuration failure and puts affected channels in the corresponding fault state.

• An unconfigured module channel can be assumed to have the default configuration Analog Data Format 0, 0 to 20 mA and Analog Mode Fault State minimum range. If a non-assigned format is selected, then the diagnostic 2 for configuration failure is set and the module channel goes to the default fault state minimum range.

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12 Configurable FLEX I/O Analog Module Features

Diagnostic Data error 11 = data out of range

04812162024

Output mA

datatable

20.000

16.000

12.000

8.000

4.000

0.000

-4.000

Output =

datatable

(

1000

)

Output = 20

datatable

(

10000

)

Output = 20

datatable

(

65535

)

• If on the other hand, the configuration had been changed, from the default, and then it was changed again to a non-assigned format, then the diagnostic bit 2 for configuration failure is set and the module goes to the fault state for the last valid configuration.

• Formats 13 and 14 are 2’s complement data formats, and require data to the module in that form.

• Range: 0…15

•Default: 0

• Data Table Reference: data format, word 12 and 13, bits 0…3, bits 4…7

If data is sent to the module which is out of range, the value will be clipped and Diagnostic Data will be set to 11 data out of range.

Example of Analog Format 14 and Data Clipping Performance.

1794-OF8IH Data Formats

Data Format

0mA as

1 % as

2 0…20 mA — 0…22 mA Not Assigned 3 Unsigned

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Format Resolution Full

Output Range

0…20 mA

integer as 0…20 mA

0.1% of 0…20 mA

0.2% of 0…20 mA

0.03% of 0…20 mA

0…22 mA 0…22000

0…22 mA 0…11000

0…20 mA 0…65535

Module Data Processing Data Table Value

(Interpretation)

(0…22.000 mA)

(0…110.00%)

(0…20 mA)

Count per mA/ Resolution

1000/

1.0 µA

500/

2.0 µA

3276/

0.305 µA

Analog Fault State

Min=0 mA Max=22 mA hold Last=hold FS value

Min=0 mA Max=20 mA hold Last=hold FS value

1794-OF8IH Data Formats

Output =

datatable

(

1000

)

Output = 16

datatable

(

65535

)

+ 4

Output = 16

datatable

(

10000

)

+ 4

Configurable FLEX I/O Analog Module Features 13

Data Format

4mA as

5 4…20 mA — 4…20 mA Not assigned 6 4…20 mA 4…20 mA Not assigned 7 Unsigned

8 0…20 mA 0…20 mA Not assigned 9 0…20 mA 0…20 mA Not assigned 10 0…20 mA 0…20 mA Not assigned 11 0…20 mA 0…20 mA Not assigned 12 4…20 mA Not assigned 13 4…20 mA Not assigned 14 % as

15 4…20 mA 4…20 mA Not assigned

Format Resolution Full

Output Range

4…20 mA

integer as 4…20 mA

4…20 mA

0.1% of 4…20 mA

0.03% of 4…20 mA

0.16% of 4…20 mA

2…22 mA 2000…22000

4…20 mA 0…65535

2…22 mA -1250 … +11250

Module Data Processing Data Table Value

(Interpretation)

(2.000…22.000 mA)

(4…20 mA)

(2’s complement) (-12.50% … +112.50%)

Count per mA/ Resolution

1000/

1.0 µA

4095/

0.244 µA

625/

1.6 µA

Analog Fault State

Min=2 mA Max=22 mA hold Last=hold FS value

Min=4 mA Max=20 mA hold Last=hold FS value

Min=2 mA Max=22 mA hold Last=hold FS value

Understand Image Table Mapping and Bit/Word Descriptions

Fault Alarm

Fault Alarm selects whether the channel fault detection is enabled or disabled. There is a 100 Hz (10 ms) filter for wire off or lead break detection.

Use your programming software to set the Fault Alarm. Set the feature bit to 0 to disable the alarm. Set the bit to 1 to enable wire off/lead break fault detection.

All Allen Bradley FLEX I/O modules have a sixteen word table of Real Time Data (RTD) to be transferred between the controller and the I/O module.

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14 Configurable FLEX I/O Analog Module Features

Not all 16 words need be allocated. The 1794-IF8IH has the following RTD I/O Profile:

1794-IF8IH RTD I/O Profile

RTD Index Assembly Index Assembly

RTD 0 MSW Module Status Word RTD 1 EDT Read Word EDT Read Word RTD 2…9 I:0…I:7 RTD Input Data

1794-IF8IH Analog data table

Word Bit

1514131211109876543210

0 Channel 0 Input Data 1 Channel 1 Input Data 2 Channel 2 Input Data 3 Channel 3 Input Data 4 Channel 4 Input Data 5 Channel 5 Input Data 6 Channel 6 Input Data 7 Channel 7 Input Data 8 H7H6H5H4H3H2H1H0L7L6L5L4L3L2L1L0 9 R7 R6R5R4R3R2R1R0P7P6P5P4P3P2P1P0 10 Reserved Diagnostic Status 11 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0 12 X7 X6 X5 X4 X3 X2 X1 X0 Reserved Where: Hn: Channel n High Alarm

Ln: Channel n Low Alarm Pn: Channel n Out Of Range Alarm Rn: Channel n Second (Remote) Alarm Fn: Channel n HART Failure Cn: Channel n HART Current Fault Xn: Channel n HART Transmitter Present

0: False 1: True

Chapter Summary

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In this chapter, we told you about the FLEX I/O system and the analog I/O modules, and how they communicate with programmable controllers. Move on to the next chapter to learn how to install your FLEX I/O analog module.

Chapter

ATTENTION

WARNING

Install Your FLEX I/O Analog Modules

Overview

Before You Install Your Analog Module

Read this chapter to install the input and output analog modules.

Topic Page

Before You Install Your Analog Module 15 Removal and Insertion Under Power 15 Install the Module 16 Wire the Terminal Base Units 22 Connect Wiring to the FLEX I/O HART Analog Modules 22 Ground the Module 24 Chapter Summary 24

Before installing your FLEX I/O analog module:

Steps to Complete Before Installation

You Need To As Descibed Under

Verify that the module will be installed in a suitable enclosure

Position the keyswitch on the terminal base Install the Module, page 18

Removal and Insertion Under Power, page 17

These modules do not receive primary operational power from the backplane. +V and -V DC power must be applied to your module before installation. If power is not applied, the module position will appear to the adapter as an empty slot in your chassis.

Removal and Insertion Under Power

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These module are designed so you can remove and insert them under power. However, take special care when removing or inserting these modules in an active process. I/O attached to any module being removed or inserted can change states due to its input/output signal changing conditions.

If you insert or remove the terminal base while backplane power is on, an electrical arc can occur. This could cause an explosion in hazardous location installations.

Be sure that power is removed or the area is nonhazardous before proceeding.

16 Install Your FLEX I/O Analog Modules

WARNING

ATTENTION

When used in a class I, division 2, hazardous location, this equipment must be mounted in a suitable enclosure with proper wiring method that complies with the governing electrical codes.

Install the Module

Installation of the module consists of the following:

• Mounting the terminal base unit.

• Installing the analog I/O module into the terminal base unit.

• Installing the connecting wiring to the terminal base unit.

If you are installing your module into a terminal base unit that is already installed, proceed to page 21.

Do not use the unused terminals on the terminal base unit. Using the terminals as supporting terminals can result in damage to modules and/or unintended operation of your system.

Mount on a DIN Rail

Do not remove or replace a terminal base unit when power is applied. Interruption of the flexbus can result in unintended operation or machine motion.

Install the Terminal Base Unit

1. Remove the cover plug in the male connector of the unit to which you are connecting this terminal base unit.

2. Check to make sure that the 16 pins in the male connector on the adjacent device are straight and in line so that the mating female connector on this terminal base unit will mate correctly.

3. Make certain that the female flexbus connector is fully retracted into the base unit.

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Install Your FLEX I/O Analog Modules 17

ATTENTION

41106

41107

4. Position the terminal base at a slight angle and hooked over the top of the 35 x 7.5mm DIN rail A (Allen Bradley part number 199-DR1)

5. Slide the terminal base over tight against the adapter (or proceeding terminal base). Make sure the hook on the terminal base slides under the edge of the adapter (or proceeding terminal base) and the FLEXbus connector is fully retracted.

Do not force the terminal base into the adjacent modules. Forcing the units together can bend or break the hook and allow the units to separate and break communication over the backplane.

6. Rotate the terminal base onto the DIN rail with the top of the rail hooked under the lip on the rear of the terminal base.

Use caution to make sure that the female flexbus connector does not strike any of the pins in the mating male connector.

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18 Install Your FLEX I/O Analog Modules

41108

41109

7. Press down on the terminal base unit to lock the terminal base on the DIN rail. If the terminal base does not lock into place, use a screwdriver or similar device to open the locking tab, press down on the terminal base until flush with the DIN rail and release the locking tab to lock the base in place.

Gently push the Flexbus connector into the side of the adapter (or proceeding terminal base) to complete the backplane connection.

8. For specific wiring information, refer to the installation instructions for the module you are installing in this terminal base unit. Terminal assignments are also given later in this chapter, see page 22.

9. Repeat the above steps to install the next terminal base unit. Be sure the Flexbus connector cover on the last terminal base unit is in place.

Mount on a Panel or Wall

Installation of a FLEX I/O system on a wall or panel consists of:

• laying out the drilling points on the wall or panel.

• drilling the pilot holes for the mounting screws.

• mounting the adapter mounting plate.

• installing the terminal base units and securing them to the wall or panel.

If you are installing your module into a terminal base unit that is already installed, proceed to Mount the Analog Modules on the Terminal Base Unit on page 21.

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Install Your FLEX I/O Analog Modules 19

(35.5)

1.4

41547

35.5 (1.4)

15.6 (0.61)

58.5 (2.3)

40.5 (1.6)

8 (0.3)

35.5 (1.4)

58.5 (2.3)

35.5 (1.4)

0.83 (21)

50 (2.0)

Measurements are in mm (in.)

40871

TIP

Use the mounting kit Cat. No. 1794-NM1 for panel/wall mounting.

Description Description

1 Mounting plate for adapter 3 Terminal base unit (not included) 2 #6 Self-tapping screws 4 Adapter module (not included)

To install the mounting plate on a wall or panel:

1. Lay out the required points on the wall/panel as shown in the drilling

dimension drawing.

Cable is either 292.1 mm (11.5 in.) or 901.0 mm (35.5 in.) from upper connector — depending if you use 0.3 m (1 ft) or 0.91 m (3 ft) cable.

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20 Install Your FLEX I/O Analog Modules

ATTENTION

IMPORTANT

Be careful of metal chips when drilling cable mounting holes. Do not drill holes above a system that has any modules installed.

2. Drill the necessary holes for the #6 self-tapping mounting screws.

3. Mount the mounting plate for the adapter module using two #6

self-tapping screws (18 included for mounting up to 8 modules and the adapter).

Make certain that the mounting plate is properly grounded to the panel. Refer to Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1

4. Hold the adapter at a slight angle and engage the top of the mounting plate in the indention on the rear of the adapter module.

5. Press the adapter down flush with the panel until the locking lever locks.

6. Position the terminal base unit up against the adapter and push the

female bus connector into the adapter.

7. Secure to the wall with two #6 self-tapping screws.

8. Repeat for each remaining terminal base unit.

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Install Your FLEX I/O Analog Modules 21

Label here

40231

or under here

Mount the Analog Modules on the Terminal Base Unit

The HART analog input and output modules mounts on a 1794-TB3 or 1794-TB3S terminal base unit.

1. Rotate keyswitch on terminal base unit clockwise to position 3 for the

1794-IF8IH or position 4 for the 1794-OF8IH as required for each type of module. Do not change the position of the keyswitch after wiring the terminal base unit.

Description Description

1 FLEXbus connector 5 Base unit 2 Latching mechanism 6 Alignment groove 3 Keyswitch 7 Alignment bar 4 Cap plub 8 Module

2. Make certain the Flexbus connector is pushed all the way to the left to connect with the neighboring terminal base/adapter. You cannot install the module unless the connector is fully extended.

3. Make sure the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base unit.

4. Position the module with its alignment bar aligned with the groove on the terminal base.

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22 Install Your FLEX I/O Analog Modules

41307

IMPORTANT

ATTENTION

IMPORTANT

5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism is locked into the module.

6. Remove cap plug and attach another terminal base unit to the right of this terminal base unit if required. Make sure the last terminal base has the cap plug in place.

The adapter is capable of addressing eight modules. Do not exceed a maximum of eight terminal base units in your system.

Wire the Terminal Base

Wiring the FLEX I/O HART analog input modules is done using the 1794-TB3 or the 1794-TB3S terminal base unit.

Units

Connect Wiring to the FLEX

Each 1794-IF8IH input can be operated from an analog field device signal, and each 1794-OF8IH output channel can operate an analog field device.

I/O HART Analog Modules

The FLEX I/O analog modules do not receive primary operational power from the backplane. +24V DC power must be applied to your module before operation. If power is not applied, the module position will appear to the adapter as an empty slot in your chassis. If the adapter does not recognize your module after installation is completed, cycle power to the adapter.

When interconnecting several lines, you must consider the total accumulated power.

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Install Your FLEX I/O Analog Modules 23

ATTENTION

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

18 19 20 21 22 23 3324 25 26 27 28 29 30 31 3217

35 36 37 38 47 48 49 5034

39 40 41 42 43 44 45 46

44319

Row A Row B

Row C

Row B

Row C

Row A

1794-TB3S shown

Label placed at top of wiring area

Current input

AC or DC four-wire current transmitter

DC only three-wire current transmitter

DC only two-wire current transmitter

Connections for the 1794-IF8IH HART Analog Input Module on a 1794-TB3 Terminal Base Unit

Do not use the unused terminals on the terminal base unit. Using these terminals as supporting terminals can result in damage to the module and/or unintended operation of your system.

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24 Install Your FLEX I/O Analog Modules

ATTENTION

44319x

Row A Row B

Row C

Row B

Row C

Row A

1794-TB3S shown

Label placed at top of wiring area

Actuator Actuator

Actuator

IN0 IN1 IN2 IN3

8 CH HART ISOLATED ANALOG INPUT

1794-xx8iH

I/O

IN4 IN5 IN6 IN7

PWR

44398

Connections for the 1794-OF8IH HART Analog Output Module on a 1794-TB3 or 1794-TB3S Terminal Base Unit

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

18 19 20 21 22 23 3324 25 26 27 28 29 30 31 3217

35 36 37 38 47 48 49 5034

39 40 41 42 43 44 45 46

Do not use the unused terminals on the terminal base unit. Using these terminals as supporting terminals can result in damage to the module and/or unintended operation of your system.

Ground the Module

Chapter Summary

In this chapter, we told you how to install your input module in an existing programmable controller system and how to wire to the terminal base units.

Go to the next chapter to learn about input, output and configuration files for HART analog I/O modules on ControlNet and EtherNet networks.

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Chapter

IMPORTANT

Input, Output and Configuration of the FLEX I/O HART Analog I/O Modules

Overview

Read this chapter to familiarize yourself with input, output and configuration files for analog I/O modules on the ControlNet or EtherNet network.

Topic Page

Use Programming Software in Your FLEX I/O Application 25 About the ControlNet and EtherNet Adapters 26 Communication Over the FLEX I/O Backplane 26 I/O Structure 28 Fault State Data 28 Device Actions 28 Chapter Summary 29

In this chapter, you will learn about:

• using software to configure the FLEX I/O modules.

• the ControlNet and EtherNet adapter.

•I/O structure.

• fault state data.

• communication fault data.

• idle state behavior.

• input data behavior upon module removal.

Use Programming Software in Your FLEX I/O Application

25 Publication 1794-UM065B-EN-E - September 2010

This chapter provides a brief description of the steps you must take in your programming software to configure FLEX I/O modules and an overview of what occurs during configuration.

For a full explanation of how to use your programming software to perform module configuration, use the software online help.

When using FLEX I/O analog modules, you must perform I/O mapping and configure the ControlNet network before generating configuration data for your I/O modules.

For example, you may use RSNetWorx software to connect FLEX I/O modules to a ControlNet processor or scanner through a FLEX I/O

26 Input, Output and Configuration of the FLEX I/O HART Analog I/O Modules

IMPORTANT

ControlNet adapter (cat. no. 1794-ACNR15). The I/O configuration portion of another programming software, for example RSLogix5 software, could be used to generate the configuration data for each I/O module in the control system.

Configuration data is transferred from the controller to the I/O modules when communication to the modules is first established.

Follow these general guidelines when configuring I/O modules.

1. Perform I/O mapping.

2. Configure all I/O modules.

3. Change to Run mode to initiate communication.

4. Download module configuration.

About the ControlNet and EtherNet Adapters

Communication Over the FLEX I/O Backplane

The FLEX I/O ControlNet and EtherNet adapter interfaces up to 8 FLEX I/O modules to a ControlNet processor or scanner. The adapter can support ControlNet real-time data connections to individual modules or module groups. Each connection is independent of the others and can be from different processors or scanners.

The FLEX HART modules utilize cyclic extended data transfer (CEDT) for configuration and data management. Your adapter must support the CEDT functionality to fully take advantage of the modules data.

Make sure your ControlNet adapter firmware supports the cyclic EDT functionality (Version 5 or greater), and that your EtherNet adapter firmware is Version 4.2 or greater. If using RSLogix 5000 software, you must use V17 or later.

One adapter can interface up to eight terminal base units with installed FLEX I/O modules, forming a FLEX I/O system of up to eight slots.

The adapter communicates to other network system components (typically one or more controllers, scanners, or programming terminals) over the network. The adapter communicates with its I/O modules over the FLEX I/O backplane.

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Input, Output and Configuration of the FLEX I/O HART Analog I/O Modules 27

I/O Module I/O ModuleI/O Module

Configuration Configuration Configuration

Inputs Inputs Inputs

Status

Outputs

StatusStatus

OutputsOutputs

Read Words

Write Words

Slot 0 Slot 1 Slot 7

Network

Network Adapter

Read

Write

Configuration data is not continuously updated to the module.

Scheduled Data Transfer

Scheduled data transfer:

• is continuous.

• is asynchronous to the controller program scan.

• occurs at the actual rate displayed in the Actual Packet Interval field on the programming software ControlNet I/O mapping (monitor) screen.

Unscheduled Data Transfer

Unscheduled operations include:

• unscheduled nondiscrete I/O data transfers – through ControlNet I/O Transfer (CIO) instructions.

• peer-to-peer messaging–through message (MSG) instructions.

• messaging from programming devices.

Unscheduled messaging on a network is nondeterministic. Your application and your configuration (for example, number of nodes, application program, NUT, and amount of scheduled bandwidth used), determine how much time there is for unscheduled messaging.

Module I/O Mapping

The I/O map for a module is divided into read words and write words. Read words consist of input and status words, and write words consist of output and

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28 Input, Output and Configuration of the FLEX I/O HART Analog I/O Modules

configuration words. The number of read words or write words can be 0 or more.

The length of each I/O module’s read words and write words vary in size depending on module complexity. Each I/O module will support at least 1 input word or 1 output word. Status and configuration are optional, depending on the module.

I/O Structure

Fault State Data

Device Actions

Output data is received by the adapter in the order of the installed I/O modules. The output data for slot 0 is received first, followed by the output data for slot 1, and so on up to slot 7.

Input data is sent by the adapter. The first word is the Adapter status word. This is followed by the input data from each slot, in the order of the installed I/O modules. The input data from slot 0 is first after the status word, followed by input data from slot 1, and so on up to slot 7.

The FLEX I/O HART modules provides storage for alternate module output data during communication faults or processor idle state. This fault state data assures that a known output will be applied to the output devices during the previously mentioned modes.

The processor or scanner software must include the means to specify this fault state data for each module. If applicable, this data is sent in the configuration block, see page 13.

Device actions include:

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• Communication fault behavior

• Idle state behavior

• Input data behavior upon module removal

Communication Fault Behavior

You can configure the response to a communication fault for each I/O module in its system. Upon detection of a communication fault, the module can:

• Leave the module output data in its last state (hold last state)

• Reset the module output data to zero (reset)

• Apply fault state data to the module output

Input, Output and Configuration of the FLEX I/O HART Analog I/O Modules 29

Idle State Behavior

The FLEX I/O HART module can detect the state of the controlling processor or scanner. Only 2 states can be detected: Run mode, or Program mode (idle).

When Run mode is detected, the adapter copies the output data received from the processor to the corresponding module output. When Program mode is detected, the I/O module can be configured to:

• Leave the module output data in its last state (hold last state)

• Reset the module output data to zero (reset)

• Apply fault state data to the module output

Chapter Summary

In this chapter you learned about input, output and configuration files for the analog I/O modules on ControlNet or EtherNet networks.

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30 Input, Output and Configuration of the FLEX I/O HART Analog I/O Modules

Notes:

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Chapter

1794-IF8IH and 1794-OF8IH Configuration

Overview

This chapter explains how to configure your FLEX I/O module. Use RSLogix programming software to install and configure your HART module. This chapter describes how to configure your HART analog I/O modules, but is limited to a relatively brief explanation of how to use the software. For more information on the full capabilities of the software, see the software's online help by clicking Help from dialogs.

See the table for a list of where to find specific information in this chapter.

Topic Page

Data Transfer Types 31 Real Time Data (RTD) Profile, Primary Input Parameters 45 Real Time Data (RTD) Profile, Primary Status Parameters 46 Secondary Input Data Table, Cyclic EDT Input Data 52 Interpret the Status Indicators 57 Module Configuration for the 1794-OF8IH 57 Real Time Data (RTD) Profile, Status Parameters 70 Real Time Data (RTD) Profile, Output Parameters 73 Secondary Input Data Table, Cyclic EDT Input Data 75 Status Indicators 75 Chapter Summary 76

Data Transfer Types

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The module will make use of three data transfer modes that will be supported by the FLEX I/O Adapter.

The first mode is traditional real time data transfer called Cyclic Data Transfer (CDT). This class 1 connection transfers a continuous block of 16 words maximum, composed of Input, Output, and Configuration registers. CDT will be used for standard Analog data transfers and is described in 1794-IF8IH I/O Profile and Configuration Parameters below.

The second mode of data transfer makes use of the Cyclic EDT mode. Cyclic EDT will be used for continuous Class 1 transfer of HART data. This includes the first four dynamic HART Data variables, along with standard HART status information.

32 1794-IF8IH and 1794-OF8IH Configuration

1794-IF8IH I/O Profile

All Allen Bradley FLEX I/O modules have a sixteen word table of Real Time Data (RTD) to be transferred between the controller and the I/O module. Not all 16 words need be allocated. The IF8IH has the following RTD IO Profile:

RTD Index Assembly/Index Asembly

RTD 0 MSW Module Status Word RTD 1 EDT Read Word EDT Read Word RTD 2…9 I:0…I:7 RTD Input Data RTD 10…14 S:0…14 RTD Input Data RTD 15 EDT Write Word EDT Write Word

In addition to the RTD, the module uses EDT for Configuration and HART data. The IF8IH has the following EDT IO Profile:

Nunmber of Word EDT Assembly

42 EDT Configuration Data 98 Cyclic EDT HART Input Data (Accessed in eight 24 byte Assemblies) 48 EDT Output Pass-Through message request buffer A 48 EDT Output Pass-Through message request buffer B 48 EDT Input Pass-Through message request buffer A 48 EDT Input Pass-Through message request buffer B

Configuration Parameters

The configuration is shown in the table below. These are normal module configuration items and are sent to the module. Configuration is located at EDT assembly 37.

Configuration Parameters

Word Bit

1514131211109876543210

0 R R F7F6F5F4

1 DH7 DH6 DH5 DH4 DH3DH2 DH1 DH0

BOB

(1)

RRF3F2F1F0

Reserved

(2)

BOA

(1)

2 CH 3 Format CH 2 Format CH 1 Format CH 0 Format 3 CH 7 Format CH 6 Format CH 5 Format CH 4 Format 4 CH1 HART Current Ratio FLTR1 CH0 HART Current Ratio FLTR0

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1794-IF8IH and 1794-OF8IH Configuration 33

Configuration Parameters

Word Bit

1514131211109876543210

5 CH3 HART Current Ratio FLTR3 CH2 HART Current Ratio FLTR2 6 CH5 HART Current Ratio FLTR5 CH4 HART Current Ratio FLTR4 7 CH7 HART Current Ratio FLTR7 CH6 HART Current Ratio FLTR6 8 Reserved 9 CH0 High Alarm threshold 10 CH0 Low Alarm threshold 11 CH0 Remote High High Alarm Limit 12 CH0 Remote Low Low Alarm Limit 13…16 Words 9…12 for Channel 1 17…20 Words 9…12 for Channel 2 21…24 Words 9…12 for Channel 3 25…28 Words 9…12 for Channel 4 29…32 Words 9…12 for Channel 5 33…36 Words 9…12 for Channel 6 37…40 Words 9…12 for Channel 7 41 Reserved C7 C6 C5 C4 C3 C2 C1 C0

(1)

not shown or used in RSLogix 5000.

(2)

reserved data may not be shown in certain controller software

Configuration Map Descriptions

BOA BOB

Byte order group A Byte order group B

Byte order group A and B values must match each other.

Refer to the Byte Order table on page 37. FLTRn Channel n Digital Filter Refer to 1794-IF8IH Channel Digital Filter table Fn Fault mode channel n 0: Local/Remote faults disabled 1: Enabled CHn HART

Current Ratio

HART current fault ratio limit on channel n

Valid values are 0, or 5…31 percent of full scale. A value of 0 disables this

feature. Refer to the 1794-IF8IH HART Current Ratio table on page 34 for more

information. DHn Disable HART communications on

0: HART communications enabled 1: HART communications disabled

channel n

Cn HART CMD 3 Disable 0: HART CMD 3 communications

enabled

1: HART CMD 3 communications

disabled R Reserved CH N Format Refer to the 1794-IF8IH Channel Data Formats table on page 34.

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34 1794-IF8IH and 1794-OF8IH Configuration

1794-IF8IH Channel Data Formats

Format

(1)

Bits Format Name Signal Range User Range Resolution 15 14 13 12 11 10 9 8 7654 LO HI LO HI 3210

0 00000…20 mA in Milliamps 0.00 22.00 0 (0.000 mA) 22000 (22.000 mA) 1.0 µA 1 00010…20 mA in % Full Scale0.00 22.00 0 (0%) 11000 (110.00%) 2.0 µA 3 00110…20 mA in UINT 0.00 20.00 0 65535 0.3052 µA

(2)

(1)

All other formats are invalid.

(2)

HART Communications supported with these data formats only.

01004…20 mA in Milliamps 2.00 22.00 2000 (2.000 mA) 22000 (22.000 mA) 1.0 µA

01014…20 mA in % Full Scale2.00 22.00 -1250 (-12.50%) 11250 (112.50%) 1.6 µA

01114…20 mA in UINT 4.00 20.00 0 65535 0.2441 µA

1794-IF8IH Channel Digital Filter

Digital Filter frequency Decimal

Value

Bits 10 9 8 210

470 Hz 0 0 0 0 62 Hz 1 0 0 1

19.6 Hz 2 0 1 0

16.7 Hz 3 0 1 1 10 Hz 4 1 0 0

4.17 Hz 5 1 0 1 Not applicable 6 1 1 0 Not applicable 7 1 1 1

1794-IF8IH HART Current Ratio

HART Current Ratio Limit

Decimal Value

Bits 15 14 13 12 11 76543

Disabled 0 0 0 0 0 0 Not applicable 1 0 0 0 0 1 Not applicable 2 0 0 0 1 0 Not applicable 3 0 0 0 1 1 Not applicable 4 0 0 1 0 0

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5% 5 00101

IMPORTANT

1794-IF8IH HART Current Ratio

1794-IF8IH and 1794-OF8IH Configuration 35

HART Current Ratio Limit

6% 6 00110 7% 7 00111 8% 8 01000 9% 9 01001 10% 10 0 1 0 1 0 … … …………… 30% 30 1 1 1 1 0 31% 31 1 1 1 1 1

Decimal Value

Bits 15 14 13 12 11 76543

Byte Order (2 of 2 bits)

This setting selects the byte order of module's data. Note: The MSW and EDT words (Words 0, 1 and 15) of the Primary Input Data Table are not swapped. All other Primary Input Data and Configuration Data are adjusted according to the following chart

Byte Order

Byte Order Group B

Bit 9 Bit 8 Bit 1 Bit 0 Description

0 0 0 0 Little Endian Format (default) — all data entries in true

1 0 1 0 Word Swap — word swap only values requiring more

0 1 0 1 Byte Swap — byte swap all words in data table. 1 1 1 1 Big Endian Format — all data entries in true Big Endian

Byte Order Group A

Little Endian format

than one word, for example, 32 bit float values.

format.

Byte Order can not be changed using RSLogix 5000 software. RSLogix 5000 uses the default Byte Swap setting.

The purpose of this parameter is to allow this module to operate properly within data networks or systems utilizing various byte orders, across all data types (for example, Boolean data to 32 bit float data). Upon receiving the configuration assembly the module must inspect BYTE ORDER to determine how to interpret the configuration assembly.

Two sets of Byte Order bits are provided since the module will not know at power-up and configuration reception what Endian format the configuration

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36 1794-IF8IH and 1794-OF8IH Configuration

data being received is in. No matter what the format, two bit sets will always convey correct information to the module. Both sets must match each other for the module to accept the configuration and begin processing it for operation. If the two sets do not match, the module will revert to the last valid configuration (in case of original start-up this would be default configuration) and set module Diagnostic Status to 2, configuration failure.

Reasoning for this configuration parameter: Within the CIP based Rockwell Automation (RA) control system all data is transported and utilized in Little Endian format. As such the default mode of operation for these modules will be Little Endian.

Since these modules are HART modules, and HART data is normally provided in Big Endian format, the module will be responsible for converting any HART in Big Endian format into Little Endian format.

Additionally, partners provide ProfiBus scanners and adapters for the RA system. ProfiBus operates in Big Endian format.

For FLEX I/O and FLEX Ex I/O: The Logix scanner byte swaps on word boundaries, based on the GSD configuration data for a FLEX transfer. The FLEX adapter byte swaps on word boundaries, based on the GSD configuration data.

The test shows this to be true, that is, Little Endian data from the FLEX backplane gets byte swapped on word boundaries onto the wire, but ends up being back in Little Endian on Logix memory.

If a user utilized ProfiBus and Logix with these new FLEX I/O modules having 32 bit REAL values he would leave the BYTE ORDER parameter at default. The Logix scanner byte swaps on word boundaries, based on the GSD configuration data for a FLEX transfer. The FLEX I/O adapter byte swaps on word boundaries, based on the GSD configuration data. True little Endian REAL data from the FLEX I/O backplane gets byte swapped on word boundaries onto the wire, but ends up being back in little Endian on Logix memory.

If a user utilized ProfiBus with these new FLEX I/O modules having 32 bit REAL values he would set the BYTE ORDER parameter at WORD SWAP. The scanner would read the data off the wire. The FLEX I/O module would word swap the REAL values. The FLEX I/O adapter byte swaps on word boundaries, based on the GSD configuration data. True little Endian REAL data from the modules gets word swapped onto the FLEX I/O backplane gets byte swapped on word boundaries onto the wire, and ends up in big Endian format in memory.

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1794-IF8IH and 1794-OF8IH Configuration 37

Examples

In each of the following examples, the module operates internally with little Endian byte order.

Little Endian BYTE ORDER

If BYTE ORDER indicates Little Endian, utilize the configuration assembly directly.

Partial Configuration Assembly as Received

Partial Configuration Assembly after BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1 2 Param C CH0 (2nd byte) Param C CH0 (low byte) 3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Little Endian byte order. The following two tables are an example of the Primary Input Data, if BYTE ORDER indicated Little Endian.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 3 Ch2 Data C Ch2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 3 Ch2 Data C Ch 2 Data B

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38 1794-IF8IH and 1794-OF8IH Configuration

Word Swap BYTE ORDER

If BYTE ORDER indicates Word Swap, utilize the known structure of the configuration assembly to re-order multi-word data elements to Little Endian byte order, for example, word swap FLOATS).

Partial Configuration Assembly as Received

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1 2 Param C CH0 (high byte) Param C CH0 (3rd byte) 3 Param C CH0 (2nd byte) Param C CH0 (low byte)

Partial Configuration Assembly after BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1 2 Param C CH0 (2nd byte) Param C CH0 (low byte) 3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Word Swap byte order, except the MSW and EDT words (Words 0, 1 and 15), these remain in Little Endian byte order.

The following tables are an example of the Primary Input Data, if BYTE ORDER indicated Word Swap.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 3 Ch2 Data C Ch 2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 2 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 3 Ch2 Data C Ch 2 Data B

Fault Mode (8 of 1 bit)

Selects whether the channel fault detection for Local and Remote Alarms is enabled or disabled. This does not disable High and Low Alarms.

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Range: 0=disable, 1=fault detection enabled (remote transmitter loop, wire off and overload or short circuit) Default: 0 Data Table Reference: fault mod, Configuration Word 0, Bits 2…5 and 10…13.

Accuracy vs Filter Cutoff

1794-IF8IH and 1794-OF8IH Configuration 39

Input Filter Cutoff (8 of 3 bits)

ADC Filter Frequency for channel. This parameter affects channel accuracy: See the table below.

Data Table Reference: filter cutoff, Configuration Words 4…7, bits 0…2, 8…10.

Filter Cutoff

Frequency n/a n/a 470 Hz 62 Hz 19.6 Hz 16.7 hz 10 Hz 4.17 Hz Word Setting n/a n/a 101 100 011 010 001 000

(1)

For settings of 6 & 7 the module will return a configuration error and remain in the last properly configured state.

(1)

543210 (Default)

ADC Conversion Rate, Channel Update Time and Repeatability

The following table shows the channel update time, channel settling time, repeatability, 50 Hz normal mode rejection and 60 Hz normal mode rejection for each A/D conversion rate. The repeatability is based on six-sigma RMS noise levels.

ADC Conversion Rate Effects

A/D Conversion Rate

4.17 Hz 240 msec 480 msec 0.12 μa 74 dB 74 dB

10.0 Hz 100 msec 200 msec 0.23 μa 69 dB 69 dB

16.7 Hz 60 msec 120 msec 0.31 μa 80 dB

Channel Update Time

Channel Settling Tim e

Repeatability 50 Hz

Rejection

60 Hz Rejection

19.6 Hz 51 msec 101 msec 0.35 μa 90 dB 62 Hz 16 msec 32 msec 0.59 μa 470 Hz 2 msec 4 msec 2.27 μa

Data Format (8 of 4 bits)

Specifies the module data format. Formats 2, 6 and 8…15 are not assigned. If they are selected, a configuration failure will be declared. The configuration is not accepted and the last valid configuration will be used.

Formats 5, 12, 13 and 14 are 2's complement data formats, and will return data in that form.

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Datatable = 10000

input

(

)

Datatable = 65535

input

(

)

1794-IF8IH Data Formats

Alarms are adjustable with Formats 0-7. See Data Formats and Error Ranges. Alarms are preset/fixed with Formats 8-15. See Data Formats and Error Ranges. Range: 0…15, See 1794-IF8IH Data Formats on page 40 Default: 0 Data Table Reference: data format, Configuration Words 2 and 3, bits 0…3, 4…7, 8…11, 12…15.

Data Format

0 0…20 mA

1 0…20 mA

2 Not Assigned 3 0…20 mA

4 4…20 mA

Format Resolution Input Range Module Data Processing Data Table Value

as mA

as %

as unsigned integer

as mA

0.1% of 0…20 mA

0.2% of 0…20 mA

0.03% of 0…20 mA

0.1% of 4…20 mA

(Interpretation)

0…22 mA Datatable = 1000 (input) 0…22000

(0…22.000 mA)

0…22 mA 0…11000

(0…110.00%)

0…20 mA 0…65535

(0…20 mA)

2…22 mA Datatable = 1000 (input) 2000…22000

(2.000…22.000 mA)

Count per mA/ Resolution

1000/

1.0 µA 500/2.0 µA

3276/

0.3052 µA

1000/

1.0 µA

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1794-IF8IH Data Formats

Datatable = 10000

input-4

(

)

Datatable = 65535

input-4

(

)

1794-IF8IH and 1794-OF8IH Configuration 41

Data Format

5 4…20 mA

6 Not Assigned 7 4…20 mA

8 0…20 mA Not Assigned 9 0…20 mA Not Assigned 10 0…20 mA Not Assigned 11 0…20 mA Not Assigned 12 4…20 mA Not Assigned 13 4…20 mA Not Assigned 14 4…20 mA Not Assigned 15 4…20 mA Not Assigned

Format Resolution Input Range Module Data Processing Data Table Value

0.16% of

as %

as unsigned integer

4…20 mA

0.03% of 4…20 mA

(Interpretation)

2…22 mA -1250 … +11250

( 2’s c om pl em en t) (-12.50% … +112.50%)

4…20 mA 0…65535

(4…20 mA)

Count per mA/ Resolution

625/

1.6 µA

4095/

0.2441 µA

Remote Low Low Alarm Limit (8 of 16 bit)

Sets the limit for the Remote Fault Low Low Alarm in 1 μA steps. This affects Data Formats 0…7. Steps apply to the 4…20 mA range.

For example, a value of 3600 will cause a Remote Fault Low Low Alarm below

3.6 mA (3600*1 μA=3.6 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled Data Table Reference: Remote Low Low Alarm Limit, Configuration Words 12, 16, 20, 24, 28, 32, 36 and 40, bits 0…15

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44780

Data Formats and Error Ranges

Remote High High Alarm Limit (8 of 16 bit)

Sets the limit for the Remote Fault High High Alarm in 1 μA steps. This affects Data Formats 0…7. Steps apply to the 4…20 mA range and 0…20 mA range.

For example, a value of 20400 will cause a Remote Fault High High Alarm above 20.4 mA (20400*1 μA = 20.4 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled Data Table Reference: Remote High High Alarm Limit, Configuration Words 11, 15, 19, 23, 27, 31, 35 and 39, bits 0…15

Low Alarm Limit (8 of 16 bit)

Sets the limit for the Low Alarm in 1 μA steps. This affects Data Formats 0…7. Steps apply to the 4-20 mA range.

For example, a value of 4000 will cause an Low Alarm below 4.0 mA (4000*1 μA = 4 mA).

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Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled Data Table Reference: Low Alarm Limit, Configuration Words 10, 14, 18, 22, 26, 30, 34 and 38, bits 0…15

1794-IF8IH and 1794-OF8IH Configuration 43

High Alarm Limit (8 of 16 Bit)

Sets the limit for the High Alarm in 1 μA steps. This affects Data Formats 0…7. Steps apply to the 4-20 mA range and 0…20 mA range.

For example, a value of 20000 will cause an High Alarm above 20.0 mA (20000*1 μA = 20 mA).

Range: 0…22000 (0=disabled, 1*1 μA to 22000*1 μA) Default: 0=disabled Data Table Reference: High Alarm Limit, Configuration Words 9, 13, 17, 21, 25, 29, 33 and 37, bits 0…15

HART Disable Channel 0 to 7 (8 of 1 bit)

When this bit is set, the I/O module is inhibiting its HART Communication.

Range: 0= enable, 1= disable Default: 0 Data Table Reference: HART DISABLE, Configuration Word 1 bits 8…15

HART Current Fault Limit (8 of 5 bits)

Delivers the percentage value (in steps of 1%, starting @ 5%) of the threshold for causing a HART current fault indication (input signal deviation HART/ Analog) = 31% maximum deviation.

If there is no HART transmitter on the loop or the loop is not in the transmitter list the function is switched off internally in the I/O module.

Range: 0=disabled, 1…4= not supported by the I/O module. A configuration request of 1…4 will cause a value of 5 to be utilized by the module. 5…31= percentage threshold data (5…31%).

Default: 0

Command 3 Disable (8 of 1 bit)

This bit disables the I/O channel from forwarding the associated HART Command 3 information from the HART Field device through Cyclic EDT to the adapter.

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44 1794-IF8IH and 1794-OF8IH Configuration

This does not disable the module from gathering HART Command 3 information from the HART Field device. As such, HART Command 3 information from the HART Field device is still available via an unconnected message to the module.

When the adapter powers up, it reads each module to find out which modules are present in the Flexbus. For EDT modules it reads Assembly 125 to gain knowledge of all the assemblies the module has, whether they are EDT/CEDT and whether they are GET/SET. If an assembly is a CEDT assembly, the adapter automatically creates a CEDT entry and drops it into the EDT machine to gather/send this assembly and store the assembly locally in the adapter. Sometime later a ForwardOpen configuration arrives by the network for the module. The adapter proxy strips off a portion (Configuation Part 1) and sends the rest (Configuration Part 2) on through EDT to the module. Within this module configuration part are the CMD3 Disable Chx bits. These bits instruct the module to include or not include CMD3 scanning in the work for the channel. Users may not have HART devices on every channel so some channels may want CMD3 disabled. If scanning is disabled, the module also disables the adapter from including that particular associated assembly in the CEDT scanning routine by the method described below.

The module uses the CMD3 Disable Chx bits to adjust the CEDT entries in Assembly 125. Initially the Assembly 125 CEDT assemblies (46-53) are identified as CEDT (0xC0 Cyclic EDT Get or 0x40 Cyclic EDT Set). This causes the adapter to add them to the CEDT scan. If the module receives a configuration with CMD3 Disable CHx bits set to "1" (disable), the module changes the appropriate channel's Assembly 125 entry from 0xC0 Cyclic EDT Get to 0x80 EDT Get or 0x40 Cyclic EDT Set to 0x00 EDT Set.

Whenever the adapter receives a ForwardOpen to an EDT module, the adapter automatically rereads the module's Assembly 125 to gain a new view of the assemblies. This reread is to check for any changes of CEDT Assemby status to EDT status. If a CMD3 Disable Chx was received on any particular channel, now the previous CEDT assembly is marked as an EDT assembly and the adapter will not add that assembly to his CEDT scan. This ForwardOpen reread will happen any time a module receives a ForwardOpen, including a Null-ForwardOpen received during system runtime.

Range: 0 = enabled, 1 = disabled Default: 0

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Real Time Data (RTD) Profile, Primary Input Parameters

Input Map

Word Bit

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

0 Channel 0 Input Data 1 Channel 1 Input Data 2 Channel 2 Input Data 3 Channel 3 Input Data 4 Channel 4 Input Data 5 Channel 5 Input Data 6 Channel 6 Input Data 7 Channel 7 Input Data 8 H7H6 H5H4H3H2H1H0L7 L6 L5 L4 L3 L2 L1 L0 9 R7R6 R5R4R3R2R1R0P7 P6P5P4 P3P2P1 P0 10 11 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0 12 X7 X6 X5 X4 X3 X2 X1 X0 Reserved Where: Hn: Channel n High Alarm

Ln : Channel n Low Alarm Rn : Channel n Out of Range Alarm Pn : Channel n Second (Remote) Alarm Fn : Channel n HART Failure Cn : Channel n HART Current Fault Xn : Channel n HART Transmitter Present

Primary Input Data (8 of 16 bits each)

Specifies the value of the input data from the module. Specific format is controlled by module Data Format Control parameter. Range: Refer to Data Format (8 of 4 bits) on page 39. Data Table Reference: input data, Input Words 0…7 (I0…I7), bits 0…15.

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Real Time Data (RTD) Profile, Primary Status Parameters

Alarms

This module is capable of generating four different alarms; low, high, remote and loop alarm. The diagram below graphically shows at what values these alarms are generated for Data Format 5.

Alarm Operation

In this example the normal active data range is 4…20 mA. The alarms will be generated in three overlapping bands. Looking at the high end of the range first:

If the input signal exceeds the High Alarm Limit a High Alarm is generated. This alarm stays active at any value above the High Alarm Limit. The High Alarm Limit parameter allows you to program this threshold in 1 μA steps at any level from 0.0mA to 22 mA. For this data format this would indicate -25% to 112.50% of range. In practice this is meant to be used as a High Alarm, set from 20.001 mA to 22 mA (for this data format this is 100.0063% to 112.50% of range), as example.

If the input signal exceeds the Remote High High Alarm Limit the Remote Alarm is issued. This alarm stays active at any value above the Remote High High Alarm Limit. The Remote High High Alarm Limit parameter allows you to program this threshold in 1 μA steps at any level from 0.0 mA to 22 mA. For this data format this would indicate -25% to 112.50% of range. In practice this is meant to be used as a High High Alarm, set from 20.001 mA to 22 mA (for this data format this is 100.0063% to 112.50% of range), as example.

If the input continues to climb the Loop Alarm will be issued at 22 mA (112.50% of range). Again, as with the High Alarm and Remote Alarm, when the Loop Alarm is issued, it stays active at any value above 22 mA (112.50% of range).

Similarly, looking at the low end of the range:

If the input signal falls below the Low Alarm Limit an Low Alarm is generated. This alarm stays active at any value below the Low Alarm Limit. The Low Alarm Limit parameter allows you to program this threshold in 1 μA steps at any level from 0.0 mA to 22 mA. For this data format this would indicate -25% to 112.50% of range. In practice this is meant to be used as a Low Alarm, set from 3.999 mA to 2 mA (for this data format this is -0.0063% to -12.50% of range), as example.

If the input signal falls below the Remote Low Low Alarm Limit the Remote Alarm is issued. This alarm stays active at any value below the Remote Low Low Alarm Limit. The Remote Low Low Alarm Limit parameter allows you to program this threshold in 1 μA steps at any level from 0.0 mA to 22 mA. For this data format this would indicate -25% to 112.50% of range. In practice this

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1794-IF8IH and 1794-OF8IH Configuration 47

0 mA

Loop Alarm

-25.00 % -12.50 %

Remote Alarm

programmable in 1 μA steps by Remote Low Low Alarm Limit parameter

programmable in 1 μA steps by Low Alarm Limit parameter

0.00 %

Low Alarm

4 mA 20 mA

Normal Signal Range

100.00 %

programmable in 1 μA steps by High Alarm Limit parameter

programmable in 1 μA steps by Remote High High Alarm Limit parameter

112.50 %

High Alarm

Remote Alarm

Loop Alarm

22 mA

PHYSICAL INPUT SIGNLA RANGE

45152

Format 5

is meant to be used as a Low Low Alarm, set from 3.999 mA to 2 mA (for this data format this is -0.0063% to -12.50% of range), as an example.

If the input continues to fall the Loop Alarm is issued at 2 mA (-12.50%). Again, as with the Low Alarm and Remote Alarm, when the Loop Alarm is issued, it stays active at any value below 2 mA (-12.50% of range).

Data Format 5 Alarm Example, Series B

Data Formats 8…11 do not issue Low or Remote Alarms due to input low conditions, since the normal input range includes 0 mA, and these Data Formats have pre-programmed fault levels, see Data Formats and Error Ranges on page 42.

The Remote and Loop Alarms are issued with the same bit whether the cause is an under or overrange. Just looking at these bits will not indicate if the fault is from a too low or too high input. The High Alarm and Low Alarm bits should be monitored to determine which way the reading is moving. By programmatically combining High, Low and Remote Alarm bits, Low Low, Low, High and High High Alarms can be generated.

Another use of these alarms and thresholds is to accommodate transmitters which sense faults in the remote loop and give a drastic under or overrange indication to the local loop when the fault occurs. By appropriately setting the Remote High High or Remote Low Low Alarm Limit parameters and monitoring the Remote Alarm bit.

When active, these alarms trigger at set currents. Depending on Data Format, these current values may indicate percent, mA or integer values.

The Remote Alarm and Loop Alarm may be disabled by the Fault Mode bit.

The High Alarm is active for Data Formats 0-7, unless disabled by a "0" (default) value of High Alarm Limit. The High Alarm is always active for Data

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48 1794-IF8IH and 1794-OF8IH Configuration

Formats 8…15, with pre-programmed fault levels, see Data Formats and Error Ranges on page 42.

The Low Alarm is active for Data Formats 0…7, unless disabled by a "0" (default) value of Low Alarm Limit. The Low Alarm is not available for Data Formats 8…11, since the normal input range includes 0 mA. The Low Alarm is always active for Data Formats 12…15, with pre-programmed fault levels, see Data Formats and Error Ranges on page 42.

These alarm types are meant to accommodate traditional direct measurement loops and loops incorporating remote transmitters.

See to Data Format (8 of 4 bits) on page 39 and 1794-IF8IH Data Formats on page 40 for specific explanations of Data Formats, and Remote Low Low Alarm Limit (8 of 16 bit) on page 41, Remote High High Alarm Limit (8 of 16 bit) on page 42, Low Alarm Limit (8 of 16 bit) on page 42, High Alarm Limit (8 of 16 Bit) on page 43 and Data Formats and Error Ranges on page 42 for specific explanations of Error Ranges.

High Alarm (8 of 1 bit each)

Alarm signal for input overrange. For Data Formats 0…7, alarm thresholds are adjustable by the High Alarm Limit parameter. This signal is active, unless disabled by a "0" (default) value of High Alarm Limit. For Data Formats 8…15, alarm thresholds are preset. This signal is always active.

Range: 0=normal, 1=input overrange Data Table Reference: high alarm, Status Word 0, bits 8…15

Low Alarm (8 of 1 bit each)

Alarm signal for input underrange. For Data Formats 0…7, alarm thresholds are adjustable by the Low Alarm Limit parameter. This signal is active, unless disabled by a "0" (default) value of Low Alarm Limit. Data Formats 8…11 do not issue Low Alarm due to input low conditions, since the normal input range includes 0 mA. For Data Formats 12…15, alarm thresholds are preset. This signal is always active.

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Range: 0=normal, 1=input underrange Data Table Reference: Low Alarm, Status Word 0, bits 0…7

1794-IF8IH and 1794-OF8IH Configuration 49

Remote Alarm (8 of 1 bit each)

Alarm from remote transmitter, indicating transmitter difficulties, sensor difficulties or loop to the sensor is open. If no transmitter is present this alarm can be utilized as a Low Low and/or High High Alarm. This is accomplished programmatically by "ANDing" together the Remote Alarm and the Low Alarm for a Low Low Alarm and the Remote Alarm and the High Alarm for a High High Alarm.

This alarm is active for both a high indication and low indication. Alarm thresholds are adjustable by the Remote High High and Remote Low Low Alarm Limit parameters for Data Formats 0…7. Alarm thresholds are preset for Data Formats 8…15.

Range: 0=normal, 1=fault detected Data Table Reference: rem alarm, Status Word 1, bits 8…15

Loop Alarm (8 of 1 bit each)

Alarm indicating the loop to the transmitter, or, if there is no transmitter, the loop is open or shorted. When active, this alarm triggers at 2 mA and 22 mA for open and short respectively.

Range: 0=normal, 1=fault detected. Data Table Reference: local fault, Status Word 1, bits 0…7

Module Diagnostic Status (1 of 8 bits)

Response from module on its condition.

Diagnostic Status Value: 0 Channel Failure

0x00 All No Errors (default) 0x10 Channel 0 HART Iloop Threshold Configuration Error 0x11 Channel 1 HART Iloop Threshold Configuration Error 0x12 Channel 2 HART Iloop Threshold Configuration Error 0x13 Channel 3 HART Iloop Threshold Configuration Error 0x14 Channel 4 HART Iloop Threshold Configuration Error 0x15 Channel 5 HART Iloop Threshold Configuration Error 0x16 Channel 6 HART Iloop Threshold Configuration Error 0x17 Channel 7 HART Iloop Threshold Configuration Error 0x20 Channel 0 Remote/Local Alarm Configuration Error

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Diagnostic Status Value: 0 Channel Failure

0x21 Channel 1 Remote/Local Alarm Configuration Error 0x22 Channel 2 Remote/Local Alarm Configuration Error 0x23 Channel 3 Remote/Local Alarm Configuration Error 0x24 Channel 4 Remote/Local Alarm Configuration Error 0x25 Channel 5 Remote/Local Alarm Configuration Error 0x26 Channel 6 Remote/Local Alarm Configuration Error 0x27 Channel 7 Remote/Local Alarm Configuration Error 0x30 Channel 0 Over/Under Alarm Configuration Error 0x31 Channel 1 Over/Under Alarm Configuration Error 0x32 Channel 2 Over/Under Alarm Configuration Error 0x33 Channel 3 Over/Under Alarm Configuration Error 0x34 Channel 4 Over/Under Alarm Configuration Error 0x35 Channel 5 Over/Under Alarm Configuration Error 0x36 Channel 6 Over/Under Alarm Configuration Error 0x37 Channel 7 Over/Under Alarm Configuration Error 0x40 Channel 0 Format Configuration Error 0x41 Channel 1 Format Configuration Error 0x42 Channel 2 Format Configuration Error 0x43 Channel 3 Format Configuration Error 0x44 Channel 4 Format Configuration Error 0x45 Channel 5 Format Configuration Error 0x46 Channel 6 Format Configuration Error 0x47 Channel 7 Format Configuration Error 0x50 Channel 0 ADC Filter Configuration Error 0x51 Channel 1 ADC Filter Configuration Error 0x52 Channel 2 ADC Filter Configuration Error 0x53 Channel 3 ADC Filter Configuration Error 0x54 Channel 4 ADC Filter Configuration Error 0x55 Channel 5 ADC Filter Configuration Error 0x56 Channel 6 ADC Filter Configuration Error 0x57 Channel 7 ADC Filter Configuration Error 0x80 Module Hardware Failure 0x90 Channel 0 Calibration Error 0x91 Channel 1 Calibration Error 0x92 Channel 2 Calibration Error

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0x93 Channel 3 Calibration Error 0x94 Channel 4 Calibration Error

1794-IF8IH and 1794-OF8IH Configuration 51

Diagnostic Status Value: 0 Channel Failure

0x95 Channel 5 Calibration Error 0x96 Channel 6 Calibration Error 0x97 Channel 7 Calibration Error 0xA0 Channel 0 Internal Bus Com Error 0xA1 Channel 1 Internal Bus Com Error 0xA2 Channel 2 Internal Bus Com Error 0xA3 Channel 3 Internal Bus Com Error 0xA4 Channel 4 Internal Bus Com Error 0xA5 Channel 5 Internal Bus Com Error 0xA6 Channel 6 Internal Bus Com Error 0xA7 Channel 7 Internal Bus Com Error

HART Status Fields

The 1794-IF8IH supports two connections for pass through messages. Pass through messages provide a user the ability to send HART messages to the HART device by passing through the I/O Module. In additional, HART device information automatically gathered by the I/O module may be accessed through this interface.

The 1794-IF8IH provides 8 queues for each of the two connections. This allows each connection to have up to eight messages pending at any given time, one for each channel. HART pass through message implements a timeout which is fixed at twenty seconds.

The first connection is provided for a ladder logic user. The following status bits are provided to simplify ladder logic. The second connection does not have status bits provided in the RTD. It can obtain this status by implementing polling messages using the pass through message interface.

HART Failure (8 of 1 bit each)

This bit indicates each time there is a HART communication failure detected, between the module and the HART field device (HART FD), on the channel. This failure could be timeout, response checksum, parity, framing, HART FD disappears, HART FD mismatch (from device detected at last rebuild), for example. If there is a failure the appropriate channel's bit is set. The bit is not latched.

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The I/O module performs automatic retries and therefore a user should rarely recognize communication problems at the protocol layer. Therefore, this flag can be used to qualify the communication quality.

Range: 0 = no HART failures are detected, 1 = A HART failure is detected

HART Current Fault (8 of 1 bit each)

Alarm signal for HART Current Fault, indicating the HART data value is outside the HART Current Fault limit percentage. Active when limit is exceeded. The analog measured current is compared with the digital current value, read out dynamically via the HART interface. Active when limit is exceeded. Refer to HART Current Fault Limit (8 of 5 bits) on page 43.

Range: 0 = normal, 1 = fault detected.

Secondary Input Data Table, Cyclic EDT Input Data

HART Transmitter List (8 of 1 bit each)

Indicates a HART transmitter has been detected on this channel, during the last rebuild.

Range: 0 = A HART Transmitter was not detected, 1 = A HART Transmitter is detected.

The data in the following table is where the HART protocol device data is published. The data table is not available as a group in the module. It is formed in the communication adapter by the Cyclic EDT mechanism (adapter to module) where the adapter cyclically requests a set of module attributes and forms this data table.

Additionally, the adapter appends the first two words to indicate communication status between adapter and module with regard to each of the cyclic EDT transfers. Two (2) words are provided, for status, as today's adapters provide for up to 32 items in the CEDT queue.

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1794-IF8IH and 1794-OF8IH Configuration 53

For this module the total Secondary Input Data Table (I) Words = 98, as shown in the HART Input Data table..

HART Input Data

Word Bit

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

0/I Reserved Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0

HART CMD 3 (Communications Status) 1 Reserved 2 Ch0 HART Field Device Status Ch0 HART Comm Status 3 Reserved FVA TVA SVA PVA Ch0 HART Loop Status 4 Ch0 HART Privary Value (IEEE 754-1985 Single-Precision 32 bit floating point) 5 6 Ch0 HART Secondary Value (IEEE 754-1985 Single-Precision 32 bit floating point) 7 8 Ch0 HART Tertiary Value (IEEE 754-1985 Single-Precision 32 bit floating point) 9 10 Ch0 HART Fourth (Quaternary) Value (IEEE 754-1985 Single-Precision 32 bit floating point 11 12 Ch0 SV Units Code Ch0 PV Units Code 13 Ch0 FV Units Code Ch0 TV Units Code 14…25 Words 2…13 for Channel 1 26…37 Words 2…13 for Channel 2 38…49 Words 2…13 for Channel 3 50…61 Words 2…13 for Channel 4 62…73 Words 2…13 for Channel 5 74…85 Words 2…13 for Channel 6 86…97 Words 2…13 for Channel 7

HART Command 3 Communication Status (8 of 1 bits):

These bits indicate status of the CEDT data transfer between the adapter and the modules. In this module the CEDT attributes transferred are HART command 3 data for the indicated channel number.

Range: 0 = disabled or no CEDT HART Command 3 Communication error between the adapter and the I/O module, 1= a CEDT HART Command 3 Communication error between the adapter and the I/O module.

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54 1794-IF8IH and 1794-OF8IH Configuration

IMPORTANT

Data Table Reference: CMD3 Comm Status, Secondary Input Word 0 bits 0…7.

HART Field Device Command and Communication Status (8 of 8 bits)

This byte indicates the status of HART FD communication for the channel. It is the first status byte of the HART response and the FD status, example: "parity error", "framing error", "invalid selection" or "too few data bytes received" is coded in.

Data Table Reference: HART Comm Status, Secondary Input Word a, bits 0…7.

HART Field Device Status (8 of 8 bits)

This byte is part of the CMD 3 data response of the HART FD. It is the second status byte of the HART response and the FD status, example: "primary variable out of limits" or "analog output saturated" is coded in.

CMD3 2nd status byte response codes

HART Field Device Status

Bit 0 Primary variable out of limits Bit 1 Non-primary variable out of limits Bit 2 Analog output saturated Bit 3 Analog output current fixed Bit 4 More status available Bit 5 Cold start Bit 6 Configuration changed Bit 7 Field device malfunction

All bits "0" (when a communication error is reported in the CMD3 1st status byte)

Data Table Reference: HART Field Device Status, Secondary Input Word a, bits 8…15.

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1794-IF8IH and 1794-OF8IH Configuration 55

HART Loop Status (8 of 8 bits):

This byte indicates the Status of the HART loop from the I/O modules point of view. This byte is generated by the I/O module itself and not from the HART FD.

HART Loop Status

Bit 0

Bit 1 HCS_CONNECTED, A connection has been established with this device.

Bit 2 HCS_RESPONSE_ERROR, A HART message attempt ended in failure.

Bit 3 HCS_CMD48_UPDATE, Extended HART status (Command 48) was updated.

Bit 4 HCS_ILOOP_TOLERANCE, HART Current Fault loop current fault.

Bit 5 HART_update, The HART Field Device data for the channel has been updated

Bit 6 HART_Message, The channel's HART message queue has completed a message

Bit 7 Reserved

(1)

HCS_COMM_ENABLED, HART is enabled on this channel.

Range: 0 = HART not enabled on this channel, 1 = HART enabled on this channel

Range: 0 = no HART connection on this channel, 1 = HART connection on this channel

Range: 0 = no HART message failures, 1 = HART message attempt failed

Range: 0 = extended HART status (Command 48) was not updated, 1 = extended HART status (Command 48) was updated

Range: 0 = no HART Current Fault loop current fault, 1 = HART Current Fault loop current fault

since last read. Range: 0 = no HART FD data update, 1 = new HART FD data available

since request has been received. Range: 0 = no HART message has completed, 1 = a HART message has completed

HCS — HART Communications State machine

HART PV Status (8 of 8 bits):

This byte indicates the status of the HART variables (primary, secondary, third and fourth).

HART PV Status

Bit 0 The primary variable for this channel has been acquired. Bit 1 The secondary variable for this channel has been acquired. Bit 2 The third variable for this channel has been acquired. Bit 3 The fourth variable for this channel has been acquired. Bit 4 Reserved

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HART PV Status

Bit 5 Reserved Bit 6 Reserved Bit 7 Reserved

Data Table Reference: HART PV Status, Secondary Input Word b, bits 8…15.

Primary HART Variable (8 of 32 bits):

This is the Primary HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (2 of 2 bits).

Secondary HART Variable (8 of 32 bits):

This is the Secondary HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (2 of 2 bits).

Third HART Variable (8 of 32 bits):

This is the Third HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (2 of 2 bits).

Fourth HART Variable (8 of 32 bits):

This is the Fourth HART Variable from the field device. Its datatype is REAL and it is organized according to Byte Order, see Byte Order (2 of 2 bits).

Primary HART Variable Units Code (8 of 8 bits):

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This is the units code for the Primary HART Variable.

Secondary HART Variable Units Code (8 of 8 bits):

This is the units code for the Secondary HART Variable.

1794-IF8IH and 1794-OF8IH Configuration 57

Third HART Variable Units Code (8 of 8 bits):

This is the units code for the Third HART Variable.

Fourth HART Variable Units Code (8 of 8 bits):

This is the units code for the Fourth HART Variable.

Interpret the Status

The module has a single Red & Green indicator for global module status/power indication. A single bi-color indicator displays the module status

Indicators

Module Status Indicators

Module State

New Power up initialized complete and passed Self-Test.

No Config Module has not received configuration from Master.

Idle Controller in Program mode.

Active Controller in Run mode & Communication Is normal 1 1 1 Green, solid Fault FLEX I/O Comm. Fault or PU bit is one and /Fault=0 * * 0 Green, blink Fatal fault Module fails self tests or detects illegal state

Off External power has not been applied. Off

(1)

The status bits in the table correspond to module status bits available in the module status word.

(2)

Bit state flagged as '*' depends on the state transition.

Condition PU Bit Prog/Run bit Fault bit LED Color and

Loads stored configuration, if it exists. Read Module Information Block.

It can Set and Get attributes.

Communications normal

transition

(1)

as indicated below.

State

(2)

0 * * Green, blink

1 0 1 Green, blink

* * * Red, solid

* * Red, blink

Module Configuration for the 1794-OF8IH

Output Connections

This module uses the 1794-TB3, Revision B terminal base for full isolation. Connect the I+ output to the terminal contacts indicated and the corresponding center return (R) contact. Be sure to observe the polarity indicated for proper operation. Channels are numbered in order, 0 through 7, from left to right.

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58 1794-IF8IH and 1794-OF8IH Configuration

0-15

16-33

-Vin -V

C O M M O N S

+Vin +V

34-51

10325476981110 1312 1514

2928 3130 33322322 2524 27261716

CH-0

1918 2120

4746 4948 51504140 4342 45443534 3736 3938

CH-1 CH-2 CH-3 CH-4 CH-5 CH-6 CH-7

1794-OF8IH Terminal Base Connections

Connect an external 24 V DC power supply to terminals 34 (V+) and 16 (V-) observing polarities indicated. Terminals 17 through 33 are internally shorted to terminal 16. Terminal 51 is internally shorted to terminal 34. Use the DC output terminals only for low power modules, following FLEX I/O power connection guidelines.

Please follow wiring instruction for FLEX I/O modules, terminal bases and racks. Connect the Ground the shield drain wire at one end only. The preferred/required location is at the sensor end. When connecting the shield drain at the module end, connect it to earth ground using a panel or DIN rail mounting screw.

Configuration Parameters

Configuration is shown in two parts in the following. These are normal module configuration items and are sent to the module.

All configuration parameters are EDT (Extended Data Transfer) WRITE items. Configuration is located at EDT assembly 37.

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1794-IF8IH and 1794-OF8IH Configuration 59

Analog Output Module (1794-OF8IH)

Configuration Map

Word Bit

1514131211109876543210

0 FT R EW7 EW6 EW5 EW4

BOB

(1)

1 DH7 DH6 DH5 DH4 DH3 DH2 DH1 DH0

R R EW3 EW2 EW1 EW0

Reserved

(2)

BOA

(1)

2 CH 3 Format CH 2 Format CH 1 Format CH 0 Format 3 CH 7 Format CH 6 Format CH 5 Format CH 4 Format 4 CH1 HART Current Ratio L1 AFS1 CH0 HART Current Ratio L0 AFS0 5 CH3 HART Current Ratio L3 AFS3 CH2 HART Current Ratio L2 AFS2 6 CH5 HART Current Ratio L5 AFS5 CH4 HART Current Ratio L4 AFS4 7 CH7 HART Current Ratio L7 AFS7 CH6 HART Current Ratio L6 AFS6 8 DF7 DF6 DF5 DF4 DF3 DF2 DF1 DF0 DM7 DM6 DM5 DM4 DM3 DM2 DM1 DM0 9 Channel 0 Analog Fault Value Output Data 10 Channel 1 Analog Fault Value Output Data 11 Channel 2 Analog Fault Value Output Data 12 Channel 3 Analog Fault Value Output Data 13 Channel 4 Analog Fault Value Output Data 14 Channel 5 Analog Fault Value Output Data 15 Channel 6 Analog Fault Value Output Data 16 Channel 7 Analog Fault Value Output Data 17 Reserved C7 C6 C5 C4 C3 C2 C1 C0

(1)

not shown or used in RSLogix 5000.

(2)

Reserved data may not be shown in certain controller software

1794-OF8IH Channel Data Formats

(1)

Format

Bits Format Name Signal Range User Range Resolution 15 14 13 12 11 10 9 8 7654 LOHI LO HI 3210

0 0 0 0 0 0…20 mA in Milliamps 0.00 22.00 0 (0.000 mA) 22000 (22.000 mA) 1.0 µA 1 0 0 0 1 0…20 mA in % Full Scale 0.00 22.00 0 (0%) 11000 (110.00%) 2.0 µA 3 0 0 1 1 0…20 mA in UINT 0.00 20.00 0 65535 0.3052 µA

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1794-OF8IH Channel Data Formats

(1)

Format

Bits Format Name Signal Range User Range Resolution 15 14 13 12 11 10 9 8 7 6 5 4 LO HI LO HI 3210

(2)

(1)

All other formats are invalid.

(2)

HART Communications supported with these data formats only.

0 1 0 0 4…20 mA in Milliamps 2.00 22.00 2000 (2.000 mA) 22000 (22.000 mA) 1.0 µA

0 1 1 1 4…20 mA in UINT 4.00 20.00 0 65535 0.2441 µA

1 1 1 0 4…20 mA in % Full Scale 2.00 22.00 -1250 (-12.50%) 11250 (112.50%) 1.6 µA

1794-OF8IH Channel Analog Fault Mode Selection

Analog Fault Mode Decimal Value Bits

98 10

Min Scale 0 0 0 Max Scale 1 0 0 Hold Last State 2 1 0 User Specifed Data Value 3 1 1

1794-OF8IH HART Current Ratio

HART Current Ratio Limit

Decimal Value

Bits 15 14 13 12 11 76543

Disabled 0 00000 Not applicable 1 0 0 0 0 1 Not applicable 2 0 0 0 1 0 Not applicable 3 0 0 0 1 1 Not applicable 4 0 0 1 0 0 5% 5 00101 6% 6 00110 7% 7 00111 8% 8 01000

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9% 9 01001 10% 10 0 1 0 1 0

IMPORTANT

1794-OF8IH HART Current Ratio

1794-IF8IH and 1794-OF8IH Configuration 61

HART Current Ratio Limit

… … …………… 30% 30 1 1 1 1 0 31% 31 1 1 1 1 1

Decimal Value

Bits 15 14 13 12 11 76543

Byte Order (2 of 2 bits)

Selects the byte order of module's data. Note: The MSW and EDT words (Words 0, 1 and 15) of the Primary Input Data Table are not swapped. All other Primary Input Data and Configuration Data are adjusted according to the following chart:

1794-OF8IH Byte Order Configuration

Byte Order Group B

Bit 9 Bit 8 Bit 1 Bit 0 Description

0000Little Endian Format (default) — all data entries in

Byte Order Group A

true Little Endian format

1010Word Swap — word swap only values requiring

more than one word, for example, 32 bit float

values. 0101Byte Swap — byte swap all words in data table. 1111Big Endian Format — all data entries in true Big

Endian format.

Byte Order can not be changed using RSLogix 5000 software. RSLogix 5000 uses the default Byte Swap setting.

The purpose of this parameter is to allow this module to operate properly within data networks or systems utilizing various byte orders, across all data types (e.g. Boolean data to 32 bit float data).

Upon receiving the configuration assembly the module must inspect Byte Order to determine how to interpret the configuration assembly.

Two sets of Byte Order bits are provided since the module will not know at power-up and configuration reception what Endian format the configuration data he is receiving is in. No matter what the format though these two, two bit sets always convey correct information to the module. Both sets must match each other for the module to accept the configuration and begin processing it

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62 1794-IF8IH and 1794-OF8IH Configuration

for operation. If the two sets do not match the module reverts to the last valid configuration (in case of original start-up this is the default configuration), set module Diagnostic Status to "2" configuration failure, set outputs to fault states and do not start operation.

Reasoning for this configuration parameter:

Within the CIP based Rockwell Automation (RA) control system all data is transported and utilized in Little Endian format. As such the default mode of operation for these modules is Little Endian.

Since these modules are HART modules, and HART data is normally provided in Big Endian format, the module is responsible for converting any HART in Big Endian format into Little Endian format.

Additionally, partners provide ProfiBus scanners and adapters for the RA system. ProfiBus operates in Big Endian format.

The test shows this to be true, i.e. little Endian data from the FLEX backplane gets byte swapped on word boundaries onto the wire, but ends up being back in little Endian on Logix memory.

If a user utilized ProfiBus and Logix with these new FLEX I/O modules having 32 bit REAL values he would leave the Byte Order parameter at default. The Logix scanner byte swaps on word boundaries, based on the GSD configuration data for a FLEX transfer. The FLEX I/O adapter byte swaps on word boundaries, based on the GSD configuration data. True little Endian REAL data from the FLEX backplane gets byte swapped on word boundaries onto the wire, but ends up being back in little Endian on Logix memory.

If a user utilized ProfiBus with these new FLEX I/O modules having 32 bit REAL values he would set the Byte Order parameter at Word Swap. The scanner reads the data off the wire. The FLEX I/O module word swaps the REAL values. The FLEX I/O adapter byte swaps on word boundaries, based on the GSD configuration data. True little Endian REAL data from the modules gets word swapped onto the FLEX backplane gets byte swapped on word boundaries onto the wire, and ends up in big Endian format in memory.

Examples

In each of the following examples, the module operates internally with little Endian byte order.

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1794-IF8IH and 1794-OF8IH Configuration 63

Little Endian Byte Order

If Byte Order indicates Little Endian, utilize the configuration assembly directly.

Partial Configuration Assembly as Received

Partial Configuration Assembly after BYTE ORDER Inspection and Processing

Provide all data to the Primary Data table in Little Endian byte order. The following two tables are an example of the Primary Input Data, if Byte Order indicated Little Endian.

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1 2 Param C CH0 (2nd byte) Param C CH0 (low byte) 3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 3 Ch2 Data C Ch 2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 3 Ch2 Data C Ch 2 Data B

Word Swap BYTE ORDER

If BYTE ORDER indicates Word Swap, utilize the known structure of the configuration assembly to re-order multi-word data elements to Little Endian byte order, for example, word swap FLOATS).

Partial Configuration Assembly as Received

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1 2 Param C CH0 (high byte) Param C CH0 (3rd byte) 3 Param C CH0 (2nd byte) Param C CH0 (low byte)

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64 1794-IF8IH and 1794-OF8IH Configuration

Partial Configuration Assembly After BYTE ORDER Inspection and Processing

1 Param A Ch2 Param B Ch2 Param A Ch1 Param B Ch1 2 Param C CH0 (2nd byte) Param C CH0 (low byte) 3 Param C CH0 (high byte) Param C CH0 (3rd byte)

Provide all data to the Primary Data table in Word Swap byte order, except the MSW and EDT words (Words 0, 1 and 15), these remain in Little Endian byte order.

The following tables are an example of the Primary Input Data, if BYTE ORDER indicated Word Swap.

Primary Input Data Before BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 2 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 3 Ch2 Data C Ch 2 Data B

Primary Input Data After BYTE ORDER Processing for Little Endian

1 Ch2 Data A (REAL) (high byte) Ch2 Data A (REAL) (3rd byte) 2 Ch2 Data A (REAL) (2nd byte) Ch2 Data A (REAL) (low byte) 3 Ch2 Data C Ch 2 Data B

Default: 0

Fault Mode (8 of 1 bit)

Selects whether the channel fault detection is enabled or disabled. There is a 100 ms filter for wire off/lead break and short circuit detection.

Range: 0=Disable, 1= Wire off/ead break and short circuit fault detection enabled. Default: 0

Bus Communications and Module Fault Mode (1 of 1 bit)

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This parameter determines how the Module Fault State is used for bus communication and internal module faults. This parameter sets this characteristic for the module.

Range: 0=Fault States activated by bus communication faults, 1=Fault States activated by any failure (bus communications, wire off or short circuit if detection enabled, for example.)

1794-IF8IH and 1794-OF8IH Configuration 65

Default: 0

HART Disable Channel 0 to 7 (8 of 1 bit)

When this bit is set, the I/O module is inhibiting its HART Communication.

Range: 0=Enable, 1=Disable Default: 0

HART Current Fault Limit (8 of 5 bits)

Delivers the percentage value (in steps of 1%, starting @ 5%) of the threshold for causing a HART current fault indication (input signal deviation HART/ Analog) = 31% maximum deviation.

If there is no HART transmitter on the loop or the loop is not in the transmitter list the function is switched off internally in the I/O module.

Range: 0=Disabled, 1…4=Not supported by the I/O module. A configuration request of 1…4 causes a value of 5 to be utilized by the module. 5…31=Percentage threshold data (5…31%) Default: 0

Analog Data Format (8 of 4 bits each)

Specifies the module data format for a channel. Formats 2, 5, 6, 8, 9, 10, 12 and 15 are not assigned.

If a module channel has never been configured then it can be assumed to have the default configuration Analog Data Format "0", 0…20mA and Analog Mode Fault State minimum range. If a non-assigned format is selected, then the diagnostic "2" for configuration failure is set and the module channel goes to the default fault state minimum range.

If, on the other hand, the configuration is changed from the default, and then changed again to a non-assigned format, then the diagnostic bit "2" for configuration failure is set and the module goes to the fault state for the last valid configuration.

Formats 13 and 14 are 2's complement data formats, and require data to the module in that form.

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Output =

datatable

(

1000

)

Output = 20

datatable

(

10000

)

Output = 20

datatable

(

65535

)

Output =

datatable

(

1000

)

Output = 16

datatable

(

65535

)

+ 4

Output = 16

datatable

(

10000

)

+ 4

1794-OF8IH Data Formats

Range: 0…15. Refer to the 1794-OF8IH Data Formats table.

Data Format

0 (default) mA as

1 % as

2 0…20 mA — 0…22 mA Not Assigned 3 Unsigned

4 mA as

5 4…20 mA — 4…20 mA Not assigned 6 4…20 mA 4…20 mA Not assigned 7 Unsigned

15 4…20 mA 4…20 mA Not assigned

Format Resolution Full

Output Range

0…20 mA

integer as 0…20 mA

4…20 mA

integer as 4…20 mA

4…20 mA

0.1% of 0…20 mA

0.2% of 0…20 mA

0.03% of 0…20 mA

0.1% of 4…20 mA

0.03% of 4…20 mA

0.16% of 4…20 mA

0…22 mA 0…22000

0…22 mA 0…11000

0…20 mA 0…65535

2…22 mA 2000…22000

4…20 mA 0…65535

2…22 mA -1250 … +11250

Module Data Processing Data Table Value

(Interpretation)

(0…22.000 mA)

(0…110.00%)

(0…20 mA)

(2.000…22.000 mA)

(4…20 mA)

( 2 ’ s c o m p l e m e n t ) (-12.50% … +112.50%)

Count per mA/ Resolution

1000/

1.0 µA

500/

2.0 µA

3276/

0.305 µA

1000/

1.0 µA

4095/

0.244 µA

625/

1.6 µA

Analog Fault State

Min=0 mA Max=22 mA hold Last=hold FS value

Min=0 mA Max=20 mA hold Last=hold FS value

Min=2 mA Max=22 mA hold Last=hold FS value

Min=4 mA Max=20 mA hold Last=hold FS value

Min=2 mA Max=22 mA hold Last=hold FS value

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If data is sent to the module which is out of range, the value is clipped and Diagnostic Data is set to "11" data out of range. To view a graphical representation of this performance, see the example on page 12.

1794-IF8IH and 1794-OF8IH Configuration 67



  









 



 



Reset

Hold Last

MIN Range

MAX Range

Hold Last

Fault State Value

Normal State

Value

Fault State

Value

Fault

Latch Mode

100 ms

Filter

Blink

Timer

Reset

Output Mode

(Analog/Digital)

45287

FAULT_ALARM_0

FAULT_LED_0

CHANNEL_0

GLOBAL_RESET

LATCH_MODE_0

FAULT_MODE_0

SHRT_CRKT_0

LB_0

LOCAL_FAULT_MODE_0

PROG/RUN (EDT word Bit 15)

FAULT (EDT word Bit 14)

BUS_COM_FAULT, other internal module faults

ANALOG_DIGITAL_MODE_0

ANALOG_FAULT_STATE_0

DIGITAL_FAULT_STATE_0

OUT_0

ANALOG_FAULT_STATE_VALUE_0

Latch Mode (8 of 1 bit each)

Latch Mode determines channel operation under wire off/lead break fault conditions. Channel fault detection occurs on a continuous basis. If a fault is detected, the channel fault alarm is set (if Fault Mode is enabled).

If latch is ON the fault is latched until a Global Reset is issued at which time the fault is reset.

If latch is OFF the channel reports the fault until the fault is corrected. Upon correction the fault is reset.

Range: 0=OFF, 1=ON Default: 0

Analog/Digital Output Normal and Fault State Operation

Analog/Digital Output Mode (8 of 1 bit each)

Selects if the channel acts as a normal analog output or as a switched digital output.

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Analog Output Mode will follow the Analog Data Format selected.

Digital Output Mode will output 0 mA = OFF, 22 mA = ON if the Fault Mode is 0 = Disable. Digital Output Mode will output 500 µA = OFF, 22 mA = ON if the Fault Mode is 1 = Wire off fault detection enable.

Range: 0=Normal analog output, 1=Switched digital output Default: 0

Analog Mode Fault State (8 of 2 bits each)

Determines how module reacts to faults when channel is used in analog normal mode.

Range: 0=Go to minimum value of Full Output Range, 1=Go to maximum value of Full Output Range, 2=Hold last state, 3=Use channel fault state values given in Words 10…17.

Default: 0

Analog Mode Channel Fault State Value (8 of 16 bits each)

This parameter specifies the fault state value of the analog output data for the channel. Specific format is controlled by Analog Data Format Control parameter, see Analog Data Format (8 of 4 bits each) on page 65.

This data is used when the channel is in analog output mode.

Examples

If you choose format 2 and set the fault state value to 11000 (accordingly

110.00%), the I/O module provides 22 mA in case of fault state.

If you choose format 7 and set the fault state value to 32000, the I/O module provides 11.813 mA in case of fault state.

The fault state value is treated in the same way as the normal output value is treated. So you do not need to recalculate the current when you are used to work in a special format.

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Range: See Analog Data Format (8 of 4 bits each) on page 65.

Default: 0

1794-IF8IH and 1794-OF8IH Configuration 69

Digital Mode Fault State (8 of 1 bit each)

Determines how module reacts to faults when channel is used in digital mode.

Range: 0=Reset, 1=Hold Last State Default: 0

Command 3 Disable (8 of 1 bit)

This bit disables the I/O channel from forwarding the associated HART Command 3 information from the HART Field device through Cyclic EDT to the adapter.

This feature should be exercised by using a Null ForwardOpen method in the Logix system. That is, the connection to the module and original configuration has already been accomplished. If utilized, Command 3 Disable should be utilized under program control (change bit in module configuration tag then issue reconfiguration message to module) or, more unusually, a manual operation by an operator (open module profile, change parameter then apply).

When the adapter powers up it reads each module to find out who is out there. For EDT modules it reads Assembly 125 to gain knowledge of all the assemblies the module has, whether they are EDT/CEDT and whether they are GET/SET. If an assembly is a CEDT assembly, the adapter automatically creates a CEDT entry and drops it into his EDT machine to gather/send this assembly and store the assembly locally in the adpater. Sometime later a ForwardOpen configuration arrives by the network for the module. The adapter proxy strips off a portion (Configuation Part 1) and sends the rest (Configuration Part 2) on through EDT to the module. Within this module configuration part are the CMD3 Disable Chx bits. These bits instruct the module to include or not include CMD3 scanning in its work for the channel. Users may not have HART devices on every channel so some channels may want CMD3 disabled. If users do disable scaning, the module also disables the adapter from including that particular associated assembly in the CEDT scanning routine by the following method:

The module uses the CMD3 Disable Chx bits to adjust the CEDT entries in Assembly 125. Initially the Assembly 125 CEDT assemblies (46-53) are identified as CEDT (0xC0 Cyclic EDT Get or 0x40 Cyclic EDT Set) this causes the adapter to add them to the CEDT scan. If the module receives a configuration with CMD3 Disable CHx bits set to "1" (disable), the module

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Real Time Data (RTD) Profile, Status Parameters

changes the appropriate channel's Assembly 125 entry from 0xC0 Cyclic EDT Get to 0x80 EDT Get or 0x40 Cyclic EDT Set to 0x00 EDT Set.

Whenever the adapter receives a ForwardOpen to an EDT module, the adapter automatically rereads the module's Assembly 125 to gain a new view of the assemblies. This reread is to check for any changes of CEDT Assemby status to EDT status. If a CMD3 Disable Chx is received on any particular channel, now the previous CEDT assembly is marked as an EDT assembly and the adapter does not add that assembly to the CEDT scan. This ForwardOpen reread happens any time a module receives a ForwardOpen, including a Null-ForwardOpen received during system runtime.

Range: 0=Enabled, 1=Disabled Default: 0

1794-OF8IH Primary Data Table

Word/S ISOC

0/MSW Read RealT Bus Fail Bits # # Words to Read Module ID/Type 1/EDT Read RealT PU/

2/S0 Read RealT F7 F6 F5 F4 F3 F2 F1 F0 Diagnostic status 3/S1 Read RealT Reserved 4/S2 Read RealT C7 C6 C5 C4‘ C3 C2 C1 C0 Reserved 5/S3 Read RealT X7 X6 X5 X4 X3 X2 X1 X0 Reserved 6/EDT Write RealT Prog

7/O0 Read RealT Rese

8/O1 Write RealT Output Data Channel 0 9/O2 Read RealT Output Data Channel 1 10/O3 Read RealT Output Data Channel 2 11/O4 Read RealT Output Data Channel 3

Read/ Write

Data Transport

Bit

1514131211109876543210

Event

Reserved Read Write SeqCount EDT Data Byte from Module

Cfg

Pdg

Fault Reserved Read Write SeqCount EDT Data Byte from Module

/Run

Globa

Reservd D7D6D5D4D3D2D1D0

rved

l reset

12/O5 Read RealT Output Data Channel 4 13/O6 Read RealT Output Data Channel 5

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1794-OF8IH Primary Data Table

1794-IF8IH and 1794-OF8IH Configuration 71

Word/S ISOC

14/O7 Read RealT Output Data Channel 6 15/EDT Read RealT Output Data Channel 7 Where: Fn : Channel n Fault alarm

Read/ Write

Cn : Channel n HART Current Fault Xn : HART Transmitter List Dn : Channel n Digital out

Data Transport

Bit

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

Fault Alarm (8 of 1 bit each)

Alarm signal for open wire channel fault, detected at <2 mA (<500 µA in digital mode) and short circuit (R<42 in the 4…20 mA range, <86 in digital mode, channel off).

This alarm is disabled when a data format is selected which includes 0 mA. Range: 0=Normal, 1=Wire off/short circuit fault detected Default: 0

Diagnostic Data (1 of 8 bits)

Response from module as to its condition.

Diagnostic Status Value: 0 Channel Failure

0x00 All No Errors (default) 0x10 Channel 0 HART Iloop Threshold Configuration Error 0x11 Channel 1 HART Iloop Threshold Configuration Error 0x12 Channel 2 HART Iloop Threshold Configuration Error 0x13 Channel 3 HART Iloop Threshold Configuration Error 0x14 Channel 4 HART Iloop Threshold Configuration Error 0x15 Channel 5 HART Iloop Threshold Configuration Error 0x16 Channel 6 HART Iloop Threshold Configuration Error 0x17 Channel 7 HART Iloop Threshold Configuration Error 0x40 Channel 0 Format Configuration Error 0x41 Channel 1 Format Configuration Error 0x42 Channel 2 Format Configuration Error 0x43 Channel 3 Format Configuration Error

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Diagnostic Status Value: 0 Channel Failure

0x44 Channel 4 Format Configuration Error 0x45 Channel 5 Format Configuration Error 0x46 Channel 6 Format Configuration Error 0x47 Channel 7 Format Configuration Error 0x50 Channel 0 Data out of range 0x51 Channel 1 Data out of range 0x52 Channel 2 Data out of range 0x53 Channel 3 Data out of range 0x54 Channel 4 Data out of range 0x55 Channel 5 Data out of range 0x56 Channel 6 Data out of range 0x57 Channel 7 Data out of range 0x80 Module Hardware Failure 0x90 Channel 0 Calibration Error 0x91 Channel 1 Calibration Error 0x92 Channel 2 Calibration Error 0x93 Channel 3 Calibration Error 0x94 Channel 4 Calibration Error 0x95 Channel 5 Calibration Error 0x96 Channel 6 Calibration Error 0x97 Channel 7 Calibration Error 0xA0 Channel 0 Internal Bus Com Error 0xA1 Channel 1 Internal Bus Com Error 0xA2 Channel 2 Internal Bus Com Error 0xA3 Channel 3 Internal Bus Com Error 0xA4 Channel 4 Internal Bus Com Error 0xA5 Channel 5 Internal Bus Com Error 0xA6 Channel 6 Internal Bus Com Error 0xA7 Channel 7 Internal Bus Com Error

HART Status Fields

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The 1794-OF8IH module supports two connections for pass through messages. Pass through messages provide the ability to send HART messages to the HART device by passing through the I/O Module. In additional, HART device information automatically gathered by the I/O module may be accessed through this interface.

1794-IF8IH and 1794-OF8IH Configuration 73

The 1794-OF8IH module provides 8 queues for each of the two connections. This allows each connection to have up to 8 messages pending at any given time, one for each channel. HART pass through message implements a timeout which is fixed at 20 seconds.

HART Current Fault (8 of 1 bit each)

Alarm signal for HART Current Fault, indicating the HART data value is outside the HART Current Fault limit percentage. Active when limit is exceeded. The analog measured current is compared with the digital current value, read out dynamically via the HART interface. Active when limit is exceeded. See HART Current Fault Limit (8 of 5 bits) on page 65.

Real Time Data (RTD) Profile, Output Parameters

Range: 0=Normal, 1=Fault detected

HART Transmitter List (8 of 1 bit each)

Indicates a HART transmitter has been detected on this channel, during the last rebuild.

Range: 0=A HART Transmitter was not detected, 1=A HART Transmitter was detected.

Analog Output Data (8 of 16 bits each)

Specifies the value of the analog output data to the module. Specific format is controlled by Module Data Format Control parameter. This data is used when the channel is in analog output mode.

Range: See Analog Data Format (8 of 4 bits each) on page 65.

Digital Output Data (8 of 1 bit each)

Specifies the value of the digital output data to the module. This data is used when the channel is in digital output mode.

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74 1794-IF8IH and 1794-OF8IH Configuration

Range:

If the Fault Mode is 0=Disable: 0=Output 0 mA = OFF, 1=22 mA = ON.

If the Fault Mode is 1=Wire off fault detection enabled: 0=Output 500 µA=OFF, 1=22 mA=ON.

See Analog/Digital Output Mode (8 of 1 bit each) on page 67.

Global Reset (1 of 1 bit)

This bit resets all latched fault alarms. It acts in conjunction with the Latch Retry parameter. If any channel faults occur, the Latch Retry parameter can be set to cause the fault to be latched and the output to go to its fault state value if the Local Fault mode bit is set.

This is an edge triggered signal. It must first be set to the "1" state, reset will then occur on the "1" to "0" transition.

Range: 0=Normal, 1=Reset.

Fault (1 of 1 bit) and Run/Prog (1 of 1 bit)

Fault bit = Signal from the adapter to the module that communications has been interrupted with the network. Prog/Run bit = Signal from the adapter to the module of the processor mode. These two bits are generally used together.

When the adapter and I/O are first powered-up, the Fault bit is set to '0', by the adapter. On power-up any module outputs remain OFF (0 mA out) or reset.

When the Fault bit is a '1', the outputs follow the data specified in output data words if the Prog/Run bit indicates the processor is in the Run mode '1'. When the Fault bit is a '0' or Prog/Run bit indicates the processor is in the Program mode '0', the outputs follow the data specified in fault state configuration data words. The following is a truth table to explain this in more detail.

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Prog/Run Fault Description

1 1 Module's outputs follow the output data table all other states Module's outputs follow Fault State Values

1794-IF8IH and 1794-OF8IH Configuration 75

Range: 0=Local control of outputs, 1=Adapter controls outputs Default: 0 Data Table Reference: Fault, EDT write word, bit 14

Run/Prog Range: 0=Processor in PROGRAM mode, 1=Processor in RUN mode Default: 0

Secondary Input Data Table, Cyclic EDT Input Data

The description of this data table section is identical for HART input or output modules. See Secondary Input Data Table, Cyclic EDT Input Data for detailed information.

Secondary Data Table Section Created by the Adapter

The description of this data table section is identical for HART input or output modules. See HART Command 3 Communication Status (8 of 1 bits): on page 53 for more information.

HART Command 3 Communication Status (8 of 1 bits)

The description of this data table section is identical for HART input or output modules. See HART Command 3 Communication Status (8 of 1 bits): on page 53 for more information.

Secondary Data Table Section from Module CEDT Attribute

Status Indicators

The description of this data table section is identical for HART input or output modules.

The module status indicators conforms to the FLEX I/O standard. The Module will have a single Red & Green indicators for global module status/power indication.

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Module Status Indicators

The Module supports six states, common to all Phase 1 EDT compliant modules, as described below. A single bi-color indicators the module status as indicated below.

Module State

New Power up initialized complete and passed Self-Test.

Condition PU Bit Prog/Run bit Fault bit LED Color and

State

(2)

* * Red, blink @ 1 Hz

Loads stored configuration, if it exists. Read Module Information Block.

No Config Module has not received configuration from Master.

(1)

0 * * Green, blink @ 1 Hz

It can Set and Get attributes.

Idle Controller in Program mode.

1 0 1 Green, blink @ 1 Hz

Communications normal Active Controller in Run mode & Communication Is normal 1 1 1 Green, solid Fault FLEX I/O Comm. Fault or PU bit is one and /Fault=0 * * 0 Green, blink@ 1 Hz Fatal fault Module fails self tests or detects illegal state

* * * Red, solid

transition Off External power has not been applied. Off

(1)

The status bits in the table correspond to module status bits available in the module status word.

(2)

Bit state flagged as '*' depends on the state transition, per FLEX I/O Systems Specifications.

Chapter Summary

In this chapter, you learned how to configure your HART module and how to use the RSLogix software to install and configure your module. The next chapter describes how to configure your module to automatically collect data from the HART field device and place it in the module's Input Tag.

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Configure Module Messaging

Chapter

Overview

Read this chapter to learn how to:

• configure the module to collect HART data from HART field devices.

• use MSG Instructions to access additional HART data that is cached within the module

• use MSG Instructions to send a HART message directly to the HART device using the HART Pass-through mechanism of the module.

In this chapter, we show how to configure the 1794-IF8IH and 1794-OF8IH HART modules to automatically collect data from the HART field device and place it in the module's Input Tag. The fields of the Input Tag are described. Also in this chapter are the methods to access additional HART field device data by using a MSG instruction. By using these mechanisms, your controller has easy access to some commonly used data, and with some extra effort, access to any HART feature. The chapter contains the following main sections:

Table 6.1

Topic Page

HART Configuration Quick Start 78 Pick HART Input Data Format 78 Enable HART 78 Enable Publishing HART Command 3 Variables 79 Accessing HART Data Using CIP Message Instruction (MSG) 79 Fill in The Information Needed for a MSG Instruction 79 Select the Attribute Value for the Operation You Want to Perform 80 Retrieve Additional Information About the HART Device 81 Get Device Info Block 1 Message 82 Get Device Info Block 2 Message 84 Get Device Info Block 3 Message 85 Reset the Device Info Changed Status Bit Message 87 HART Pass through Message Overview 88 Format a HART Pass through Init Request Message 89 Format a "Get Pass through Message Status" Request 90 HART Failed Reason Code 92 Format a "Read Pass through Reply" Request 93 Chapter Summary 94

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78 Configure Module Messaging

IMPORTANT

HART Configuration Quick Start

To get your module started with HART features, follow these quick set up procedures.

Pick HART Input Data Format

To set the module to collect data from your HART instrument and place it in the Input Tag, choose the Comm Format "Input Data and HART PV" when adding the module to your I/O Configuration. If you choose "Input Data", you can access HART data via Pass through messages, but it is not included in the module's Input Tag data. If you know that you will not be using these HART variables in your control logic then choose "Input Data".

These are the minimum requirments to use the new automatic Command 3 data collection

″ 1794 -ACN(R)15 with version 5.1 firmware or 1794-AENT

with version 4.2 firmware

″ Logix controller version 17 and RSLogix 5000 version 17

software

Enable HART

In the module configuration tag "ChXHARTDisable", make sure the value is "0" for each channel that is connected to a HART device.

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Configure Module Messaging 79

IMPORTANT

Enable Publishing HART Command 3 Variables

In the module configuration tag "ChXHARTCmd3Disable", make sure the value is "0" for each channel that is connected to a HART device.

If you previously selected "Input Data" for the Comm Format because you are not using the HART Variables in your control system then set all channels of the "ChXHARTCmd3Disable" configuration tag to "1" for the best pass through messaging and Asset Management Software performance.

Accessing HART Data Using CIP Message Instruction (MSG)

The 1794-IF8IH and 1794-OF8IH modules support these broad categories of MSG based HART access:

• CIP formatted messages to retrieve common HART data cached in the module.

• CIP messages containing HART formatted commands that are passed directly to the HART Field Device for processing. These are called Pass through messages.

Fill in The Information Needed for a MSG Instruction

The "MSG" instruction is formatted as shown below.

CIP Message Format – Unconnected Message Header

Field Value Definition

Message Type "CIP Generic" Service Code 0x0E Get Attribute Single-READ DATA

0x10 Set Attribute Single-WRITE DATA Class Name 0x007D FLEX module object Instance Name 1…8 Module location

1 = module adjacent to adapter

Object Attribute 0x7E…0xA7 Selects Data Assembly or

function (see Module Data Access Assemblies)

Source Length (applies to Set Attribute Single)

Depends on data assembly selected Specifies size in bytes of

data to write to module

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Select the Attribute Value for the Operation You Want to Perform

CIP message attribute values of 0x74…0x86 are used for HART pass through messages, values 0x87…0xA6 are used to retrieve additional HART data from the modules internal database, and attribute 0xA7 is used to reset the Secondary Input table flag, HART Update, which is bit 5 of the loop status.

Module Data Access Assemblies

Attribute Size

(Words)

0x7E 1 R Get HART Channel Status (Dev Info Valid) 0x7F 1 W User -Select Handle For Msg Response Query 0x80 3 R User - Get Message Response Status 0x81 24 R/W HART Pass-through Message Request/Response Buffer 0x82 18 R/W HART Pass-through Message Request/Response Buffer 0x83 12 R/W HART Pass-through Message Request/Response Buffer 0x84 9 R/W HART Pass-through Message Request/Response Buffer 0x85 6 R/W HART Pass-through Message Request/Response Buffer 0x86 4 R/W HART Pass-through Message Request/Response Buffer 0x87 24 R Chan 0 - Get Device Info Block 1 0x88 28 R Chan 0 - Get Device Info Block 2 0x89 8 R Chan 0 - Get Device Info Block 3 0x8A 19 R Chan 0 - Get Device Info Block 4 0x8B 24 R Chan 0 - Get Device Info Block 1 0x8C 28 R Chan 0 - Get Device Info Block 2 0x8D 8 R Chan 0 - Get Device Info Block 3

R/W Description

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0x8E 19 R Chan 0 - Get Device Info Block 4 0x8F 24 R Chan 0 - Get Device Info Block 1 0x90 28 R Chan 0 - Get Device Info Block 2 0x91 8 R Chan 0 - Get Device Info Block 3 0x92 19 R Chan 0 - Get Device Info Block 4 0x93 24 R Chan 0 - Get Device Info Block 1 0x94 28 R Chan 0 - Get Device Info Block 2 0x95 8 R Chan 0 - Get Device Info Block 3 0x96 19 R Chan 0 - Get Device Info Block 4 0x97 24 R Chan 0 - Get Device Info Block 1 0x98 28 R Chan 0 - Get Device Info Block 2 0x99 8 R Chan 0 - Get Device Info Block 3 0x9A 19 R Chan 0 - Get Device Info Block 4

Module Data Access Assemblies

Configure Module Messaging 81

Attribute Size

(Words)

0x9B 24 R Chan 0 - Get Device Info Block 1 0x9C 28 R Chan 0 - Get Device Info Block 2 0x9D 8 R Chan 0 - Get Device Info Block 3 0x9E 19 R Chan 0 - Get Device Info Block 4 0x9F 24 R Chan 0 - Get Device Info Block 1 0xA0 28 R Chan 0 - Get Device Info Block 2 0xA1 8 R Chan 0 - Get Device Info Block 3 0xA2 19 R Chan 0 - Get Device Info Block 4 0xA3 24 R Chan 0 - Get Device Info Block 1 0xA4 28 R Chan 0 - Get Device Info Block 2 0xA5 8 R Chan 0 - Get Device Info Block 3 0xA6 19 R Chan 0 - Get Device Info Block 4 0xA7 1 W Reset User Device Info Changed Status Bit (Dn)

R/W Description

Retrieve Additional Information About the HART Device

The module automatically acquires and then stores information about the HART device that is connected to a channel and this data can be retrieved using the MSG instruction. You can get information such as the device identity or additional status information that the device might have on its current condition. The module request is called "Get Device Information" and each reply data structure will return specific elements of HART data that is referenced by what HART command was issued to retrieve that piece of the HART data. Refer to the HART device user manual or the HART specification for a more detailed explanation of each data element.

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Get Device Info Block 1 Message

Get Device Information Block 1 Message – Request Packet Structure

Field Value Definition

Message Type "CIP Generic" Service Type Get Attribute Single Read From Module Service Code 0x0E Class Name 0x7D FLEX Module Object Instance 1…8 (Module next to Adapter = 1) Module Location Object Attribute 0x87 = Channel 0 (Add 4 for next channel)

0x8B = Channel 1 0x8F = Channel 2 0x93 = Channel 3 0x97 = Channel 4 0x9B = Channel 5 0x9F = Channel 6

0xA3 = Channel 7 Reply Size 48 bytes Request Size 0

Get Device Information Block 1 Message – Reply Packet Structure

Selects Channel that the data is from

(1)

Offset

0 Status 00 = SUCCESS

1 Echo of Channel 0…7 Channel 2 HART ManufacturerIDCode (1 byte) CMD#0, Byte 1 3 HARTDeviceTypeCode (1 byte) CMD#0, Byte 2 4 HARTUnivCmdCode (1 byte) CMD#0, Byte 4 5 HARTTransSpecRev (1 byte) CMD#0, Byte 5 6 HARTSoftwareRevision (1 byte) CMD#0, Byte 6 7 HARTHardwareRevision (1 byte) CMD#0, Byte 7 8…11 HARTDeviceIDNumber (4 bytes - UINT) CMD#0, Bytes

12…15 TagSize 8 (4 bytes) 16…23 TagString (8 bytes unpacked ASCII) CMD#13, Bytes

24…27 DescriptorSize 16 (4 bytes)

Field Value Definition

Command status 0x86 = Channel is not HART Enabled 0x87 = No Device Found

9…11

Bytes re-ordered

into Intel Format

(LSB 1st ) from HART

format (MSB 1st)

0…5

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Configure Module Messaging 83

Get Device Information Block 1 Message – Reply Packet Structure

(1)

Offset

Field Value Definition

28…43 DescriptorString (16 bytes unpacked

ASCII)

CMD#13, Bytes

6…17 44 DataDay (1 byte) CMD#13, Byte 18 45 DataMonth (1 byte) CMD#13, Byte 19 46…47 DataYear (2 bytes) CMD#13, Byte 20

(+1900) Total = 48 bytes

(1)

Data in offsets 2…47 are set to 0 if Status in offset 0 indicates a problem (Status = 0x86 or 0x87).

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84 Configure Module Messaging

Get Device Info Block 2 Message

Get Device Information Block 2 Message – Request Packet Structure

Field Value Definition

0x8C = Channel 1

Selects Channel that the

data is from 0x90 = Channel 2 0x94 = Channel 3 0x98 = Channel 4 0x9C = Channel 5 0xA0 = Channel 6 0xA4 = Channel 7

Reply Size 56 bytes Request Size 0

Get Device Information Block 2 Message – Reply Packet Structure

(1)

Offset

0 Status 00 = SUCCESS

Field Value Definition

Command status 0x86 = Channel is not HART Enabled 0x87 = No Device Found

1 Echo of Channel 0…7 Channel 2 TransferFunction (1 byte) CMD#15, Byte 1 3 WriteProtectCode (1 byte) CMD#15, Byte 15 4…7 MessageSize (4 bytes) 8…39 MessageString (32 bytes unpacked

CMD#12, Bytes 0…23 ASCII)

40…43 HARTPVUpperRange (4 bytes - UINT) CMD#15, Bytes 3…6 44…47 HARTPVLowerRange (4 bytes - UINT) CMD#15, Bytes 7…10 48…51 DampingValue (4 bytes - UINT) CMD#15, Bytes 11…14 52…55 FinalAssemblyNumber (4 bytes - UINT) CMD#16, Bytes 0…2

Bytes re-ordered into Intel

Format (LSB 1st) from HART

Format (MSB 1st)

(1)

Data in offsets 2…55 will be set to 0 if Status in offset 0 indicates a problem (Status = 0x86 or 0x87).

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Get Device Info Block 3 Message

Get Device Information Block 3 Message - Request Packet Structure

Field Value Definition

0x8D = Channel 1 0x91 = Channel 2 0x95 = Channel 3 0x99 = Channel 4 0x9D = Channel 5 0xA1 = Channel 6

0xA5 = Channel 7 Reply Size 16 bytes Request Size 0

Get Device Information Block 3 Message – Reply Packet Structure

Selects Channel that the data is from

(1)

Offset

0 Status 00 = SUCCESS

1 Echo of Channel 0…7 Channel 2 pad 0 3 pad 0 4 PVAssignmentCode (1 byte) CMD#50, Byte 0; Set to 0xff

5 SVAssignmentCode (1 byte) CMD#50, Byte 1; Set to 0xff

6 TVAssignmentCode (1 byte) CMD#50, Byte 2; Set to 0xff

7 FVAssignmentCode (1 byte) CMD#50, Byte 3; Set to 0xff

8 PVUnits (1 byte) CMD#3, Byte 4; Set to 0 if

Field Value Definition

Command status 0x86 = Channel is not HART Enabled 0x87 = No Device Found

if HART Cmd 50 not

supported by device

if HART Cmd 50 not

supported by device

if HART Cmd 50 not

supported by device

if HART Cmd 50 not

supported by device

device does not return a

value for PV.

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86 Configure Module Messaging

Get Device Information Block 3 Message – Reply Packet Structure

(1)

Offset

Field Value Definition

9 SVUnits (1 byte) CMD#3, Byte 9; Set to 0 if

device does not return a value for SV.

10 TVUnits (1 byte) CMD#3, Byte 14; Set to 0 if

device does not return a value for TV.

11 FVUnits (1 byte) CMD#3, Byte 19; Set to 0 if

device does not return a

value for FV. 12 PVRangeUnits (1 byte) CMD#15, Byte 2 13 Pad_8 alignment (1 byte) 14 HARTPreamble (1 byte) CMD#0, Byte 3 15 HARTFlages (1 byte) CMD#0, Byte 8

(1)

Data in offsets 4…15 will be set to 0 if Status in offset 0 indicates a problem (Status = 0x86 or 0x87).

Get Device Info Block 4 Message

Get Device Information Block 4 Message – Request Packet Structure

Field Value Definition

0x8E = Channel 1

Selects Channel that the

data is from 0x92 = Channel 2 0x96 = Channel 3 0x9A = Channel 4 0x9E = Channel 5 0xA2 = Channel 6 0xA6 = Channel 7

Reply Size 38 bytes Request Size 0

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Configure Module Messaging 87

Get Device Information Block 4 Message – Reply Packet Structure

(1)

Offset Offset Field Value Definition

0 Status 00 = SUCCESS

1 Echo of Channel 0…7 Channel 2 pad 0 3 pad 0 4…7 Loop Current Float(4 bytes) 8…11 Count 0…25 (DINT,4 bytes) Number of Extended Status

12…36 Ext Status Bytes[25] 0…255 Extended Status bytes

37 pad 0

(1)

Data in offsets 4…36 will be set to 0 if Status in offset 0 indicates a problem (Status = 0x86 or 0x87).

Field Value Definition

Command status 0x86 = Channel is not HART Enabled 0x87 = No Device Found

bytes that device returned

returned by CMD48

Unused bytes are set to 0

Reset the Device Info Changed Status Bit Message

This will reset the Device Info Changed Status Bit (Bit 5 in the Loop Status Byte) located in the Secondary Input Data Table (Cyclic EDT Input Data). If this message is not sent then the bit will remain set once the module has set this bit, after it has detected that the data has changed.

Here is an example of usage of this message.

1. Detect that the "Device Info Changed Status Bit" is set.

2. Send Reset Message.

3. Send "Get Device Info Block X" messages to refresh the data that is

being used in the User's Ladder Program.

Reset Device Information – Packet Structure

Field Value Definition

Message Type "CIP Generic" Service Type Set Attribute Single Write to Module Service Code 0x10 Class Name 0x7D FLEX Module Object Instance 1…8 (Module next to Adapter = 1) Module Location

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Reset Device Information – Packet Structure

Field Value Definition

Object Attribute 0xA7 Reply Size 0 Request Size 2 bytes

Reset Device Information – Request Packet Structure

Offset Field Value Definition

0 Select Channel 0…7 Channel to reset 1 Pad NA Total = 2 bytes

HART Pass through Message Overview

FLEX I/O modules have a HART Pass through messaging mechanism that provides the user the ability to send any HART command to the HART device using MSG instructions.

There are 5 module commands related to Pass through:

• Pass through Init

• Get Pass through message Query Status

• Read Pass through Reply

• Select Handle

• Flush Queues(rarely needed).

Pass through Init is used to instruct the module to initiate a HART Pass through operation by sending the needed information for a HART Pass through request to the module. The "Get Pass through message status" read command will return status of a Pass through operation that will let you know if the pass through HART message reply has been received by the module from the device. Once the "Query Status" shows that the reply is ready then you can issue a "Read Pass through Reply buffer" operation to retrieve the reply from the module.

Each channel has a separate buffer to hold a pass through request so you can have 8 requests running at once. The module discards a reply being held in a buffer if the reply has not been retrieved from the module within 50 seconds.

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There are two types of HART Pass through Init requests, one is called "EASY-HART" and the other is called "FULL-HART". The EASY-HART method is simpler, requires less data, and does not require you to know the details of creating a fully formatted HART message as defined by the HART

Rockwell Automation 1794-OF8IH User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Summary of Changes

New and Updated Information

Preface

Why Read This Manual

Who Should Use This Manual

About the Vocabulary

Related Documentation

Overview

What FLEX I/O Analog Modules Do

Communicate with Programmable Controllers

Events Following Power-up

Physical Features of Your Module

Indicators

Use Alarms on the Input Module

Overrange Alarm

Underrange Alarm

Remote Fault Alarm

Local Fault Alarm

Use the HART Capabilities

HART Implementation Overview

Chapter Summary

Overview

Select Your Analog Input Module Operating Features

Fault Enable

Input Filter Cutoff

Data Format

Select Your Analog Output Module Operating Features

Local Fault Mode

Latch Mode

Global Reset

Data Format

Understand Image Table Mapping and Bit/Word Descriptions

Fault Alarm

Chapter Summary

Overview

Before You Install Your Analog Module

Removal and Insertion Under Power

Install the Module

Mount on a DIN Rail

Mount on a Panel or Wall

Mount the Analog Modules on the Terminal Base Unit

The HART analog input and output modules mounts on a 1794-TB3 or 1794-TB3S terminal base unit.

Connections for the 1794-OF8IH HART Analog Output Module on a 1794-TB3 or 1794-TB3S Terminal Base Unit

Ground the Module

Chapter Summary

Overview

Use Programming Software in Your FLEX I/O Application

About the ControlNet and EtherNet Adapters

Communication Over the FLEX I/O Backplane

Scheduled Data Transfer

Unscheduled Data Transfer

Module I/O Mapping

I/O Structure

Fault State Data

Device Actions

Communication Fault Behavior

Idle State Behavior

Chapter Summary

Overview

Data Transfer Types

Configuration Parameters

Examples

Fault Mode (8 of 1 bit)

Input Filter Cutoff (8 of 3 bits)

ADC Conversion Rate, Channel Update Time and Repeatability

Data Format (8 of 4 bits)

Remote Low Low Alarm Limit (8 of 16 bit)

Remote High High Alarm Limit (8 of 16 bit)

Low Alarm Limit (8 of 16 bit)

High Alarm Limit (8 of 16 Bit)

HART Disable Channel 0 to 7 (8 of 1 bit)

HART Current Fault Limit (8 of 5 bits)

Command 3 Disable (8 of 1 bit)

Real Time Data (RTD) Profile, Primary Input Parameters

Primary Input Data (8 of 16 bits each)

Real Time Data (RTD) Profile, Primary Status Parameters