Festo CPX-4AE-4AA-H Description

Terminal CPX

CPX-4AE-4AA-H

en Description

8083250

2017-12

[8083252]

CPX-4AE-4AA-H

Translation of the original instructions
E/A-Modul CPX-4AE-4AA-H-EN

HART®, Torx® are registered trademarks of the respective trademark owners in certain countries.

Other symbols:

Note

Material damage or loss of function

Recommendations, tips, references to other documentation

Text designations:
 Activities that may be carried out in any order

1. Activities that should be carried out in the order stated
– General lists
è Result of an action/References to more detailed information

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Table of contents

1 About this document 5......................................................

1.1 Further applicable documents 5...............................................

1.2 Product labelling 6..........................................................

1.3 Specified standards 6.......................................................

2 Safety 7..................................................................

2.1 General safety information 7..................................................

2.2 Intended use 7.............................................................

2.3 Training of specialised personnel 8.............................................

3 Additional information 8.....................................................

4 Service 8.................................................................

5 Product overview 8.........................................................

5.1 Function 8.................................................................

5.2 Structure of analogue module 9...............................................

5.3 Connection block 10..........................................................

5.3.1 Types 10...........................................................

5.3.2 Connection and display components 11..................................

5.4 Product-specific terms and abbreviations 12......................................

6 Mounting 13...............................................................

6.1 General instructions 13.......................................................

6.2 Mechanically coding the connection block 13......................................

6.3 Mounting the electronics module and connection block 16...........................

6.4 Dismounting the electronics module and connection block 17........................

7 Installation 18..............................................................

7.1 Prerequisites for installation 18................................................

7.2 Power supply 18.............................................................

7.3 Changing the configuration of the analogue current channels (DILswitches) 18..........

7.4 Electrical system 21..........................................................

7.4.1 Notices regarding the cable connection 21...............................

7.4.2 Attaching connecting cables to the connection block M12 21.................

7.4.3 Attaching connecting cables to the terminal connection block 22..............

7.4.4 Mechanically coding the terminal connection 25...........................

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7.5 Connection scenarios 26......................................................

7.5.1 2-wire connection of passive HART transmitters 26.........................

7.5.2 3-wire connection of passive HART transmitters 26.........................

7.5.3 4-wire connection of active HART transmitters 27..........................

7.5.4 2-wire connection of passive HART actuators 27...........................

7.5.5 4-wire connection of active HART actuators 28............................

8 Commissioning 29...........................................................

8.1 Requirements for commissioning 29.............................................

8.2 Process image and address space allocation 29....................................

8.3 HART variables 30...........................................................

8.4 Parameterisation 31.........................................................

8.4.1 Recommended parameterisation sequence 31............................

8.4.2 Overview of parameters 32............................................

8.4.3 Description of the module and channel parameters 33......................

8.5 Data format and range of values of the actual values 46.............................

8.5.1 Data format 46.....................................................

8.5.2 Input 4 … 20 mA - fixed data format 47...................................

8.5.3 Input 4 … 20 mA – scalable data format 47................................

8.5.4 Input 0 … 20 mA – fixed data format 48..................................

8.5.5 Input 0 … 20 mA – scalable data format 48................................

8.5.6 Output 4 … 20 mA – fixed data format 49.................................

8.5.7 Output 4 … 20 mA – scalable data format 49..............................

8.5.8 Output 0 … 20 mA – fixed data format 50.................................

8.5.9 Output 0 … 20 mA – scalable data format 50..............................

8.6 Scaling the range of values 51..................................................

9 Diagnostics 52..............................................................

9.1 General remarks 52..........................................................

9.2 Error messages 53...........................................................

9.3 LED indicator 55.............................................................

10 Technical data 57............................................................

Index 59........................................................................

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1 About this document

This document describes the mode of operation, mounting, installation and commissioning of the
product. Certain aspects of use are described in other documents and must be observed
è 1.1 Further applicable documents.

1.1 Further applicable documents

For all available product documentation è www.festo.com/pk

Document Table of contents

Brief description Instructions and important information on use

and safe application

Description of system CPX (CPX-SYS) Mode of operation, mounting, installation and

commissioning of CPX terminals

Description of bus node Commissioning, parameterisation and

diagnostics of terminal CPX with the bus node
Documentation for the components and the
connected peripherals
Documentation for the higher-order controller
and the additional participants in the network
Operating conditions for explosion protection For product versions with corresponding

Tab. 1 Further applicable documents

Usage of components

Commissioning and parameterisation of the

components

approval: operating conditions in potentially

explosive atmospheres

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1.2 Product labelling

6
5

4

1

2

3

1 Data Matrix Code
2 Revision code
3 14-character serial number

Fig. 1 Product label – example

The product label is located on the top of the fibre-optic cable è Fig. 3.
Scanning the printed Data Matrix Code with an appropriate device calls the Festo Support Portal, with
information appropriate for the product. Alternatively, the Product Key (11-digit alphanumeric code on
the product label) can be entered in the search field of the Support Portal.

4 Production time period (encoded)
5 Part number
6 Product description

1.3 Specified standards

Version status

NAMUR NE43:2003-02

Tab. 2 Specified standards

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2 Safety

2.1 General safety information

 Only use the product if it is in perfect technical condition.
 Observe product labelling.
 Take into consideration the ambient conditions at the location of use.
 Prior to mounting, installation and maintenance work: switch off the power supply.
 Observe the handling specifications for electrostatically sensitive devices.
 Seal unused connections with cover caps to achieve the required degree of protection.
 Use connection hardware with the required degree of protection.
 Store the product in a cool, dry, UV-protected and corrosion-protected environment.

Ensure that storage times are kept to a minimum.

2.2 Intended use

The analogue module is determined only for use in terminal CPX and terminal CPX-P of Festo.
 Operate the product only at suitable bus nodes CPX è Tab. 3.

Connect a maximum of 5 analogue modules with HART functionality to the bus nodes CPX-FB13

(PROFIBUS).
 Use only permissible combinations of module components è Tab. 4.
 The product may only be used in its original status without unauthorized modifications.

Only the conversions or modifications described in this and further applicable documents

arepermitted.
 Use the product only in an industrial environment. Outside of industrial environments, e.g. in

commercial and mixed-residential areas, actions to suppress interference may have to be taken.

Bus node Required revision

CPX-FB13 (PROFIBUS) from Rev 34
CPX-FB33 (PROFINET IO) from Rev 33
CPX-M-FB34 (PROFINET IO) from Rev 33
CPX-M-FB35 (PROFINET IO) from Rev 33

Tab. 3 Suitable bus nodes and required revisions

Interlinking block Connection block

CPX-P-AB-4XM12-4POL

Metal version Permissible Permissible
Plastic version Not permissible Permissible

Tab. 4 Permissible combination of connection block and interlinking block

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Connection block
CPX-P-AB-2XKL-8POL

CPX-4AE-4AA-H

2.3 Training of specialised personnel

This document is intended for qualified personnel. Experience with electrical control systems is
required in order to understand this documentation.

3 Additional information

– Accessories è www.festo.com/catalogue
– Spare parts è www.festo.com/spareparts
– Documents and literature è www.festo.com/sp

4 Service

Contact your regional Festo contact person if you have technical questions è www.festo.com

5 Product overview

5.1 Function

The analogue module with HART functionality provides analogue current inputs and current outputs
and enables the recording and further processing of analogue current signals.
– 4 analogue current channels, configurable as input or output by DIL switch
– LED indicators for status and fault indications on the module
– Error control parameterisable
– Scalable range of values (16 bits)
– Channel-wise signal range configurable:

– Without HART: 0 … 20 mA or 4 … 20 mA
– With HART: 4 … 20 mA

– Connection of the following field devices possible:

– 2-, 3- or 4-wire sensors

– 2-, 3- or 4-wire actuators
– HART functionality according to HART Communication Protocol Specification 7.5
– Support of the HART protocol in versions 5, 6 and 7

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5.2 Structure of analogue module

1

2

3

1 Connection block
2 Electronics module

Fig. 2 Structure of the analogue module — example

Module component Description

Connection block – Provides the connections for field devices è Chap. 5.3.
Electronics module – Contains the electronic components of the module

– Connects to the connection block and interlinking block through the

plug connector

Interlinking block – Housing bottom part for electrical and mechanical linking of the

CPXmodules
– Variant with connection possible for operating and load voltage
– Mounting option for entire terminal CPX

Tab. 5 Module components of analogue module

3 Interlinking block with contact rails

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5.3 Connection block

5.3.1 Types

Connection block type Description

M12 connection block
– 4 M12 sockets, 4-pin
– For round plug connector M12x1 and SPEEDCON M12
– Screening possible using metal thread

CPX-P-AB-4XM12-4POL

Terminal connection block
– 2 pin strips COMBICON, 8-pin
– For terminal strips in spring-loaded and screw terminal technology

CPX-P-AB-2XKL-8POL

Tab. 6 Connection blocks

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5.3.2 Connection and display components

1

32

9

8

7

1 Module identifier
2 Product labelling, connection block

(on the top side of the fibre-optic cable)

3 Module error indicator (red LED)
4 Channel error indicator (red LED)
5 Electrical connections (here: M12)

6 Earth terminal
7 Inscription labels
8 Slot for insulating plate
9 Channel status indicator (1 LED per channel)

LED 0 … 3 (green): input
LED 0 … 3 (yellow): output

Fig. 3 Connection and display components – example of M12 connection block

4

5

6

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5.4 Product-specific terms and abbreviations

Term/
abbreviation

O Output
CPX terminal (-P) Modular electrical terminal which is particularly suitable for use in the process

HART Highway Addressable Remote Transducer
HART protocol Bidirectional, platform-independent data transfer protocol that permits access

I Input
PII Process image of inputs è process image.
PIO Process image of outputs è process image.
Process image The process image is part of a controller's system memory. At the start of the

PV Primary Value
QV Quaternary Value
SV Secondary Value
TV Tertiary Value

Tab. 7 Product-specific terms and abbreviations

Significance

industry (intrinsically safe electronics modules available)

to the data of intelligent field devices

cyclical program, the signal states of the input modules are transferred to the
process image for the inputs (PII). At the end of the cyclical program, the
process image for the outputs (PIO) is transferred to the output modules as
asignal status.

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6 Mounting

6.1 General instructions

CPX terminals are delivered in mounted form. For expansion or conversion, remounting may be
necessary:
– Dismounting or remounting of the connection block when exchanging the connection technology
– Dismounting and remounting of the electronics module by setting the DIL switches or exchanging

the electronics module

Arrangement on terminal CPX

For further information on the arrangement of the modules, observe the description of
system CPX and the module documents è Chap. 1.1.

6.2 Mechanically coding the connection block

To prevent an incorrect allocation of the connection block to the electronics module, this connection
can be mechanically coded.

– The electronics module has a permanently

attached coding pin at the top è Fig. 4, 1.

– The connection block has a recess for a coding

piece at the bottom.

– Connection block in pre-assembled CPX

terminals are mechanically coded at the
factory.

1

Fig. 4 Coding pin on the electronics module

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Inserting the coding piece into the connection block

5

4

3

1

2

1 Connection block
2 Latching hook on coding piece

4 Coding pin
5 Coding piece

3 Interlinking block with electronics module

Fig. 5 Mechanical coding of connection block – example

1. Lay the interlinking block and electronics module 3 horizontally on a flat surface.

2. With the latching hook 2 facing upward, place the coding piece on the coding pin 4.

3. Align the plug connector of the connection block with the plug connector of the electronics module.

4. Push the connection block onto the electronics module without tilting until the coding piece in the
connection block engages.

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Removing a coding piece from the connection block

To change the device configuration, the coding piece might have to be removed from the connection
block.

1

5

4

1 Cover with interlock
2 Tool (e.g. pin)

4 Connection block
5 Plug connectors

3 Coding piece

Fig. 6 Remove the coding piece

1. Lay the connection block 4 on a flat surface, top side first.

2. Unlock and remove the cover 1.

3. Press out the coding piece 3 using a suitable tool 2.

4. Push the cover onto the plug connector of the connection block 5.

2

3

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6.3 Mounting the electronics module and connection block

Requirements

– Supply voltage is switched off.
– The interlinking block is clean and free of foreign matter.
– DIL switches are set è Tab. 8.

1

7

6

5

1 Connection block
2 Screws (Torx T10)
3 Electronics module
4 Contact rails

Fig. 7 Mounting of the electronics module and connection block – example

5 Interlinking block
6 Coding pin
7 Plug connectors

2

3

4

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Mounting the electronics module and connection block

Note

If threads are damaged or seals are defective, the device cannot achieve its specified
IPdegree of protection.
 Before mounting, check the seals and thread.

Replace damaged parts.

1. Check seal and seal surfaces. Replace damaged parts.

2. Place the electronics module in the interlinking block without tilting.

3. Press on the electronics module to the limit stop.

4. Align the connection block on the interlinking block with the electronics module.

5. Push the connection block onto the interlinking block without tilting.

6. Insert the screws and tighten them crosswise:
– Plastic interlinking block: thread-cutting screws
– Metal interlinking block: screws with metric thread
– Tightening torque 0.9 … 1.1 Nm

6.4 Dismounting the electronics module and connection block

1. Switch off the power supply of the entire terminal CPX:
– Compressed air
– Operating voltage for electronics and sensors
– Load voltage of valves

2. Loosen the screws of the connection block.

3. Pull the connection block out of the plug connector of the electronics module without tilting.

4. Pull the electronics module out of the contact rails of the interlinking block without tilting.

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7 Installation

7.1 Prerequisites for installation

 Switch off the power supply of the entire terminal CPX:

– Compressed air
– Operating voltage for electronics and sensors
– Load voltage of valves

7.2 Power supply

The operating and load voltage supply is fed through interlinking blocks or end plates
(Protective Extra-Low Voltage, PELV) è Description of system CPX.

7.3 Changing the configuration of the analogue current channels
(DILswitches)

Description of the switch positions

Using the DIL switches, the following analogue current channel functions can be configured:
– Input or output channel
– Expansion of the process image by HART variables (+16 bytes)

If the configuration of the analogue current channels is changed, observe the maximum
address range of the terminal CPX – e.g. if the process image is expanded by HART
variables.

Switch setting Variant PII PIO Description

Without HART variables

4AE-H 8 bytes 0 bytes Channel 0: input

Channel 1: input
Channel 2: input
Channel 3: input

3AE1AA-H 6 bytes 2 bytes Channel 0: input

Channel 1: input
Channel 2: input
Channel 3: output

2AE2AA-H 4 bytes 4 bytes Channel 0: input

Channel 1: input
Channel 2: output
Channel 3: output

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Switch setting DescriptionPIOPIIVariant

Without HART variables

1AE3AA-H 2 bytes 6 bytes Channel 0: input

4AA-H 0 bytes 8 bytes Channel 0: output

Reserved for test mode – – –

With HART variables

4AE-H + 4HV 24 bytes 0 bytes Channel 0: input

3AE1AA-H + 4HV 22 bytes 2 bytes Channel 0: input

2AE2AA-H + 4HV 20 bytes 4 bytes Channel 0: input

1AE3AA-H + 4HV 18 bytes 6 bytes Channel 0: input

4AA-H + 4HV 16 bytes 8 bytes Channel 0: output

Tab. 8 DIL switch settings

Channel 1: output
Channel 2: output
Channel 3: output

Channel 1: output
Channel 2: output
Channel 3: output

Channel 1: input
Channel 2: input
Channel 3: input

Channel 1: input
Channel 2: input
Channel 3: output

Channel 1: input
Channel 2: output
Channel 3: output

Channel 1: output
Channel 2: output
Channel 3: output

Channel 1: output
Channel 2: output
Channel 3: output

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Setting the DIL switches

Fig. 8 DIL switches for the configuration of the analogue current channels

1. Switch off the power supply of the entire terminal CPX:

– Compressed air
– Operating voltage for electronics and sensors
– Load voltage of valves

2. Loosen the screws of the connection block.

3. Pull the connection block out of the plug connector of the electronics module without tilting.

4. Set the DIL switches on the electronics module.

5. Mount the connection block è Chap. 6.3.

è The process image becomes effective after switching on the power supply.

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7.4 Electrical system

7.4.1 Notices regarding the cable connection

 For the connection of HART field devices: observe the wiring requirements according to the

HARTspecification.

 Observe the maximum line lengths for the connection of field devices: 500 m.

7.4.2 Attaching connecting cables to the connection block M12

Socket contact M12 Pin

X1

X2

X3

X4

1) Connection and display components è Fig. 3.

Tab. 9 Pin allocation on connection block CPX-P-AB-4XM12-4POL

1)

Function Signal

X1.1 24 V
X1.2 0 V

/IO0 AOUT0

SEN

SEN

XGN D
X1.3 II0 AIN0
X1.4 0 V
X2.1 24 V
X2.2 0 V

SEN

/IO1 AOUT1

SEN

SEN

XGN D

XGN D
X2.3 II1 AIn1
X2.4 0 V
X3.1 24 V
X3.2 0 V

SEN

/IO2 AOUT2

SEN

SEN

XGN D

XGN D
X3.3 II2 AIN2
X3.4 0 V
X4.1 24 V
X4.2 0 V

SEN

/IO3 AOUT3

SEN

SEN

XGN D

XGN D
X4.3 II3 AIN3
X4.4 0 V

SEN

XGN D

The metal thread of socket contact M12 is internally connected to the earth terminal
ofterminal CPX and can be used as a screen connection.

 Only use suitable plug connectors è www.festo.com/catalogue
 Seal unused connections with protective caps ISK-M12 è Accessories.

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7.4.3 Attaching connecting cables to the terminal connection block

Connection block

Pin

X1.1 24 V

X1.2 0 V

Function Signal

/IO0 AOUT0

SEN

SEN

1)

X1.3 II0 AIN0

X1

X1.4 0 V

X1.5 24 V

X1.6 0 V

SEN

/IO1 AOUT1

SEN

SEN

X1.7 II1 AIn1

X1.8 0 V

X2.1 24 V

X2.2 0 V

SEN

/IO2 AOUT2

SEN

SEN

X2.3 II2 AIN2

X2

X2.4 0 V

X2.5 24 V

X2.6 0 V

SEN

/IO3 AOUT3

SEN

SEN

X2.7 II3 AIN3

X2.8 0 V

1) Connection and display components è Fig. 3.

SEN

Tab. 10 Pin allocation on terminal connection block CPX-P-AB-2XKL-8POL

XGN D

XGN D

XGN D

XGN D

XGN D

XGN D

XGN D

XGN D

Connection blocks CPX-P-AB-2XKL-8POL do not feature a connection for the cable
screening.
 Set up the screening or equipotential bonding separately.

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Connecting the plug connector in spring-loaded terminal technology

21

4

1

3

1 Screwdriver, blade 2.5 x 0.4 mm
2 Cable

3 Unlocking
4 Terminal opening

Fig. 9 Connection of the connecting cable in spring-loaded terminal technology

Spring-loaded terminal NECU-L3G8-C1-...

Conductor cross section with wire end sleeve [mm2] 0.25 … 2.5
Strip length [mm] 10

Tab. 11 Specifications for spring-loaded terminal

 Only use suitable terminal strips è www.festo.com/catalogue
 Connect only one conductor per spring-loaded terminal.
 With a screwdriver, press the unlocking pin and insert the conductor end with the wire end sleeve

into the terminal opening to the limit stop.

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Connecting the plug connector in screw terminal technology

12

1

3

4

1 Screwdriver
2 Cable

3 Screw terminal
4 Terminal opening

Fig. 10 Connection of the connecting cable in screw terminal technology

Screw terminal NECU-L3G8-C2-...

Conductor cross section with wire end sleeve [mm2] 0.25 … 2.5
Strip length [mm] 10

Tab. 12 Specifications for screw terminal

 Only use suitable terminal strips è www.festo.com/catalogue
 Connect only one conductor per screw terminal.
 Loosen the screw terminal, insert the conductor end with wire end sleeve and tighten the

screwterminal (tightening torque: 0.5 … 0.6 Nm).

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7.4.4 Mechanically coding the terminal connection

The terminal connection can be mechanically coded with a coding system.
The coding system is optionally available è www.festo.com/catalogue.
 Recommendation: provide each contact with a coding element.

1

2

3

4

1 Terminal strip
2 Coding profile for the groove of the

terminalstrip

Fig. 11 Use of the mechanical coding system

3 Coding tab for the recess on the box header
4 Box header

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7.5 Connection scenarios

7.5.1 2-wire connection of passive HART transmitters

24 V

SEN

IIx

+ 4 … 20 mA HART
–
L+
L–

2

1

1 HART input module: active 2 HART transmitter: passive

Fig. 12 2-wire connection of a passive HART transmitter

Power supply for the HART transmitter, HART communication and actual values in the same circuit

7.5.2 3-wire connection of passive HART transmitters

24 V

SEN

IIx

+ 4 … 20 mA HART
–
L+

0 V

SEN

L–

2

1

1 HART input module: active 2 HART transmitter: passive

Fig. 13 3-wire connection of a passive HART transmitter

Power supply for the HART transmitter via the HART input module

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7.5.3 4-wire connection of active HART transmitters

IIx

GND

+ 4 … 20 mA HART
–
L+
L–

2

1

3

1 HART input module: passive

3 Auxiliary energy

2 HART transmitter: active

Fig. 14 4-wire connection of an active HART transmitter

Power supply for the HART transmitter via the auxiliary energy

7.5.4 2-wire connection of passive HART actuators

AOUTx
0 V

SEN

+ 4 … 20 mA HART
–
L+
L–

1

2

1 HART output module: active 2 HART actuator: passive

Fig. 15 2-wire connection of a passive HART actuator

Power supply for the HART actuator, HART communication and setpoint in the same circuit

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7.5.5 4-wire connection of active HART actuators

AOUTx

GND

1

3

1 HART output module: passive

3 Auxiliary energy

2 HART actuator: active

Fig. 16 4-wire connection of an active HART actuator

Power supply for the HART actuator via the auxiliary energy

+ 4 … 20 mA HART
–
L+
L–

2

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8 Commissioning

8.1 Requirements for commissioning

– DIL switches for the configuration of the analogue current channels are set è Chap. 7.3.
– The analogue module is completely installed into terminal CPX and connected.

8.2 Process image and address space allocation

For each terminal CPX, 64 bytes are available for the cyclic data exchange of the inputs and outputs.

Variant I/O Contents of bytes

7 6 5 4 3 2 1 0

4AE-H Input IW CH3 IW CH2 IW CH1 IW CH0 8 bytes

Output – – – – 0 bytes

3AE1AA-H Input – IW CH2 IW CH1 IW CH0 6 bytes

Output – – – SW CH3 2 bytes

2AE2AA-H Input – – IW CH1 IW CH0 4 bytes

Output – – SW CH3 SW CH2 4 bytes

1AE3AA-H Input – – – IW CH0 2 bytes

Output – SW CH3 SW CH2 SW CH1 6 bytes

4AA-H Input – – – – 0 bytes

Output SW CH3 SW CH2 SW CH1 SW CH0 8 bytes

1) IW CH0 = actual value of channel 0 (input), SW CH1 = setpoint value of channel 1 (output), etc.

Tab. 13 Process image for variants without HART variables

1)

Address space
allocation

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Variant I/O Contents of bytes

1)

2223202118191617141512131011896745230

1

4AE-H
+ 4HV

Input HV4 HV3 HV2 HV1 IW

CH3IWCH2IWCH1IWCH0

Output – – – – – – 0 bytes

3AE1AA-H
+ 4HV

Input – HV4 HV3 HV2 HV1 IW

CH2IWCH1IWCH0

Output – – – – – – SW

CH3
2AE2AA-H
+ 4HV

Input – HV4 HV3 HV2 HV1 IW

CH1IWCH0

Output – – – – – SW

CH3SWCH2
1AE3AA-H
+ 4HV

Input – HV4 HV3 HV2 HV1 IW

CH0

Output – – – – SW

CH3SWCH2SWCH1

4AA-H

Input – HV4 HV3 HV2 HV1 16 bytes

+ 4HV

Output – – – SW

CH3SWCH2SWCH1SWCH0

1) IW CH0 = actual value of channel 0 (input), SW CH1 = setpoint value of channel 1 (output), etc.; HV= HART variable

Tab. 14 Process image for variants with HART variables

Address
space
allocation

24 bytes

22 bytes

2 bytes

20 bytes

4 bytes

18 bytes

6 bytes

8 bytes

8.3 HART variables

The process image can be expanded by a total of 4 HART variables è Tab. 14.
– Quantity per HART variable: 4 bytes
– Data format: 16-bit value

Depending on the higher-order control system, low byte and high byte may be organised differently.
– If an invalid value has been determined, 0xFFFF is transmitted.
– Determination of the HART variables to be transferred during parameterisation è Chap. 8.4.

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8.4 Parameterisation

The CPX terminal and the module described here can be parameterised with the operator unit
(CPX-MMI), the Festo Maintenance Tool (CPX-FMT) software or the higher-level system.

8.4.1 Recommended parameterisation sequence

Changed parameters are not valid until a complete check and saving procedure have been performed
(max.30 ms).
Until saving and in case of invalid values, the previous settings apply.
To prevent parameterisation errors, observe the following sequence when changing the
parameterisation:

1. Activate the “Module CPX monitoring, parameterisation of error control” module parameter
è Tab. 16.

2. Activate the “Channel 0 … 3 monitoring” for the channel to be changed è Tab. 19.

3. Set the data format è Tab. 18.

4. Set the limit values for each channel è Tab. 20, Tab. 21.
– When the upper limit value is positive, set the upper limit value before setting the lower

limitvalue.

– If the upper limit value is negative, set the lower limit value before setting the upper limit value.

Further information on parameterisation è Description of system CPX and description
ofthe bus node.

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8.4.2 Overview of parameters

Tab. 15 shows an overview of the parameters contained in the analogue module.
Detailed parameter description è Chap. 8.4.3.

Function number Bit Parameter Presetting Details

4828 + m* 64 + 0 0 Monitoring of short circuit/overload Active Tab. 16

1 … 6 Reserved –
7 Monitoring of parameterisation errors Active

4828 + m* 64 + 1 0 Behaviour after short circuit/overload Automatic

Tab. 17

return

1 … 7 Reserved –

4828 + m* 64 + 2 0 … 7 Reserved –
4828 + m* 64 + 3 0 … 7 Reserved –
4828 + m* 64 + 4 0 … 7 Reserved –
4828 + m* 64 + 5 0 … 7 Reserved –
4828 + m* 64 + 6 0 Data format Sign + 15 bits Ta b. 18

1 … 3 Reserved –
4 Monitoring according to NAMUR NE43 Inactive
5 … 6 Reserved –
7 Reserved –

4828 + m* 64 + 7 … 10 0 … 7 Monitoring of channel 0 … 3 – Tab. 19
4828 + m* 64 + 11 … 18 0 … 7 Lower limit value of channel 0 … 3 -27648 Tab . 2 0
4828 + m* 64 + 19 … 26 0 … 7 Upper limit value of channel 0 … 3 27648 Tab. 21
4828 + m* 64 + 27 0 … 3 Number of HART repetitions 0 Tab. 22

4 … 7 Reserved –

4828 + m* 64 + 28 … 29 0 … 7 Limit monitoring hysteresis of

0 Tab. 23

channel0 … 3

4828 + m* 64 + 30 0 … 7 Signal range of channel 0 … 3 Inactive Ta b. 24
4828 + m* 64 + 31 0 … 7 Smoothing factor Inactive Ta b. 26
4828 + m* 64 + 32

0 … 7 IEEE variable 0 … 3 PV, channel 0 Tab. 28

4828 + m* 64 + 33
Access via protocol-specific
functions

Fail-safe of channel 0 … 3 – Ta b. 31
Idle mode of channel 0 … 3 – Ta b. 32
Forcing of channel 0 … 3 – Tab. 3 3

Tab. 15 Overview of the module and channel parameters

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8.4.3 Description of the module and channel parameters

Module parameters: monitoring of short circuit/overload, monitoring of parameter errors

Function

4828 + m* 64 + 0 m = module number (0 … 47)
number
Description Monitoring of the analogue module for the following errors:

– Short circuit or overload

– Parameterisation errors for the lower and upper limit value, hysteresis

The monitoring of the errors can be individually activated or deactivated.

Active monitoring has the following effect:

– Error message at the CPX bus nodes

– The error LED is illuminated è Fig. 18.

SCS monitoring

The SCS monitoring can be activated for the entire terminal CPX è Description of

system CPX.

Monitoring of parameterisation errors

Prerequisites for the monitoring of channel-specific parameterisation:

– The “Monitoring of parameterisation errors” module parameter is active.

– The “Monitoring of parameterisation errors” channel parameter is

active è Tab. 19.

Allocation Bit 0: SCS monitoring (sensor supply short-circuit/overload)

Bit 1 … 6: Reserved

Bit 7: Monitoring of parameterisation errors
Values Bit 0, 7: 0 = Inactive

1 = Active (default)

Tab. 16 Description of the “Module CPX monitoring, parameterisation of error control” module

parameter

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Module parameter: behaviour after short circuit/overload

Function

4828 + m* 64 + 1 m = module number (0 … 47)
number
Description Determination of the behaviour of the power supply after short circuit or overload

inan input or output
Allocation Bit 0: Behaviour after short circuit/overload

Bit 1 … 7: Reserved
Values Bit 0: 0 = Leave voltage deactivated

For voltage recovery, “Power On” or a reparameterisation of the
module parameter is required.

1 = Restart voltage

The voltage is restarted automatically after the cause of the error
is remedied (presetting).

Tab. 17 Description of the “Behaviour after short circuit/overload” module parameter

Module parameter: data format, monitoring according to NAMUR NE43

Function

4828 + m* 64 + 6 m = module number (0 … 47)
number
Description Setting of the data format

Activation of monitoring according to NAMUR NE43:

– Monitoring effective for signal range 4 … 20 mA (with and without HART)

– Error message if the input value undershoots or exceeds the limit values

according to NAMUR NE43

Allocation Bit 0: Data format setting

Bit 1 … 3: Reserved

Bit 4: Monitoring according to NAMUR NE43

Bit 7: Reserved
Values Bit 0: 0 = Sign + 15 bits (presetting)

1 = Linear scaling

Bit 4: 0 = Inactive (presetting)

1 = Active

Tab. 18 Description of the “Data format, monitoring according to NAMUR NE43” module parameter

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Channel parameter: monitoring of channel 0 … 3

Function
number

4828 + m* 64 + 7
4828 + m* 64 + 8

m = module number (0 … 47)

4828 + m* 64 + 9
4828 + m* 64 + 10

Description Monitoring of the individual channels of the analogue module for the following

errors:
– Lower and upper limit value
– Wire break (idling)
– Overflow/underflow
– Parameterisation error for the lower and upper limit value
The monitoring of the errors can be individually activated or deactivated.
Active monitoring has the following effect:
– Error message at the CPX bus nodes
– The error LED is illuminated è Fig. 18.

Monitoring of lower and upper limit values

– Error message when the lower limit value is undershot è Tab. 20.
– Error message when the upper limit value is exceeded è Tab. 21.

Monitoring of wire break (idling)

– Effective for signal range 4 … 20 mA (with and without HART)
– Range of values for wire break detection at inputs è Chap.8.5.
– The wire break detection at outputs is effective only if the current value output

amounts to at least 1 mA.

Monitoring of overflow/underflow

Error message when the range of values is left è Chap.8.5.

Monitoring of parameterisation errors

Prerequisites for the monitoring of channel-specific parameterisation:
– The “Monitoring of parameterisation errors” module parameter is

active è Tab. 16.

– The “Monitoring of parameterisation errors” channel parameter is active.

Allocation Bit 0: Monitoring of lower limit value

Bit 1: Monitoring of upper limit value
Bit 2: Monitoring of wire break (idling)
Bit 3: Monitoring of overflow/underflow
Bit 4 … 6: Reserved
Bit 7: Monitoring of parameterisation errors

Values Bit 0 … 3: 0 = Inactive (presetting)

1 = Active

Bit 7: 0 = Inactive

1 = Active (default)

Tab. 19 Description of “Monitoring of channel 0 … 3” channel parameter

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Channel parameter: lower limit value of channel 0 … 3

Function
number

4828 + m * 64 + 11 (channel 0, low byte)

4828 + m * 64 + 13 (channel 1, low byte)

4828 + m * 64 + 15 (channel 2, low byte)

4828 + m * 64 + 17 (channel 3, low byte)

4828 + m * 64 + 12 (channel 0, high byte)
4828 + m * 64 + 14 (channel 1, high byte)
4828 + m * 64 + 16 (channel 2, high byte)
4828 + m * 64 + 18 (channel 3, high byte)

m = module number (0 … 47)

Description Setting of the lower limit value for the individual channels of the analogue

input module è Chap. 8.6.

– The lower limit value must be smaller than the upper limit value.

– The permissible values depend on the set data format è Tab. 18.

– With data format “linear scaling,” the limit values have the function of scaling

end values.
Prerequisites for the monitoring of channel-specific parameterisation:
– The “Monitoring of parameterisation errors” module parameter is

active è Tab. 16.
– The “Monitoring of parameterisation errors” channel parameter is

active è Tab. 19.
Active monitoring has the following effect:
– Invalid values are not assumed. The last valid value is kept.

Allocation Bit 0 … 7: Low byte or high byte as limit value
Values Presetting: -27648 (low byte = 0, high byte = 148)

Tab. 20 Description of “Lower limit value of channel 0 … 3” channel parameter

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Channel parameter: upper limit value of channel 0 … 3

Function
number

4828 + m * 64 + 19 (channel 0, low byte)
4828 + m * 64 + 21 (channel 1, low byte)
4828 + m * 64 + 23 (channel 2, low byte)
4828 + m * 64 + 25 (channel 3, low byte)

4828 + m * 64 + 20 (channel 0, high byte)
4828 + m * 64 + 22 (channel 1, high byte)
4828 + m * 64 + 24 (channel 2, high byte)
4828 + m * 64 + 26 (channel 3, high byte)

m = module number (0 … 47)

Description Setting of the upper limit value for the individual channels of the analogue input

module è Chap. 8.6.
– The upper limit value must be greater than the lower limit value.
– The permissible values depend on the set data format è Tab. 18.
– With data format “linear scaling”, the limit values have the function of scaling

end values.
Prerequisites for the monitoring of channel-specific parameterisation:
– The “Monitoring of parameterisation errors” module parameter is

active è Tab. 16.
– The “Monitoring of parameterisation errors” channel parameter is

active è Tab. 19.
Active monitoring has the following effect:
– Invalid values are not assumed. The last valid value is kept.

Allocation Bit 0 … 7: Low byte or high byte as limit value
Values Presetting: 27648 (low byte = 0, high byte = 108)

Tab. 21 Description of “Upper limit value of channel 0 … 3” channel parameter

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Module parameter: HART repetition

Function

4828 + m* 64 + 27 m = module number (0 … 47)
number
Description If the analogue module receives a faulty or no answer from a HART telegram sent to

the field device, the telegram is sent repeatedly according to the set value (0 … 10).
Allocation Bit 0 … 3: Number of repetitions
Values Presetting: 0

Range of values: 0 … 10

Recommended setting: 5

Tab. 22 Description of the “HART repetition” module parameter

Module parameter: limit monitoring hysteresis of channel 0 … 3

Function
number

4828 + m* 64 + 28 (low byte)

4828 + m* 64 + 29 (high byte)

m = module number (0 … 47)

Description Setting of the hysteresis behaviour for limit monitoring:

– The hysteresis applies to all channels simultaneously.

– The set hysteresis value must not be larger than the difference between the

upper and lower limit values.

– The hysteresis value is not checked during entry.

If an invalid value has been assumed, the analogue module can react

unexpectedly.
Prerequisites for the monitoring of channel-specific parameterisation:
– The “Monitoring of parameterisation errors” module parameter is

active è Tab. 16.
Active monitoring has the following effect:
– Error message (limit values and hysteresis è Fig. 17)

Allocation Bit 0 … 7: Low byte or high byte of hysteresis
Values Presetting: 0 (low byte = 0, high byte = 0)

Tab. 23 Description of the “Limit monitoring hysteresis” module parameter

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Limit values and hysteresis

11

Actual value too low:
channel error LED and
module error LED light
up red.

Error
message on

Error
message off

Error
message off

Actual value too high:
channel error LED and
module error LED light
up red.

Error
message on

Actual value

23

1 Hysteresis

3 Upper limit value

2 Lower limit value

Fig. 17 Error messages at hysteresis

The hysteresis has the same variable for both limit values and is located in the middle between the
values.
If a hysteresis is set, the analogue module behaves as follows:
– If the lower limit value is undershot by the half hysteresis value, an error message is output.
– If the lower limit value is exceeded by the half hysteresis value, an error message extinguishes.
– If the upper limit value is exceeded by the half hysteresis value, an error message is output.
– If the upper limit value is undershot by the half hysteresis value, an error message extinguishes.

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Channel parameter: signal range of channel 0 … 3

Function

4828 + m* 64 + 30 m = module number (0 … 47)

number
Description Setting of the signal range of the inputs and outputs for the individual channels of

the analogue input module è Chap. 8.5.

Allocation Bit 0 … 1: Signal range of channel 0

Bit 2 … 3: Signal range of channel 1
Bit 4 … 5: Signal range of channel 2
Bit 6 … 7: Signal range of channel 3

Values è Tab. 25.

Tab. 24 Description of “Signal range of channel 0 … 3” channel parameter

Allocation and values 4828 + m* 64 + 30 (m = module number)
Bit 7 6 5 4 3 2 1 0 Channel Signal range

x x x x x x 0 0 Channel 0 Inactive
x x x x x x 0 1 4 … 20 mA without HART
x x x x x x 1 0 4 … 20 mA with HART
x x x x x x 1 1 0 … 20 mA
x x x x 0 0 x x Channel 1 Inactive
x x x x 0 1 x x 4 … 20 mA without HART
x x x x 1 0 x x 4 … 20 mA with HART
x x x x 1 1 x x 0 … 20 mA
x x 0 0 x x x x Channel 2 Inactive
x x 0 1 x x x x 4 … 20 mA without HART
x x 1 0 x x x x 4 … 20 mA with HART
x x 1 1 x x x x 0 … 20 mA
0 0 x x x x x x Channel 3 Inactive
0 1 x x x x x x 4 … 20 mA without HART
1 0 x x x x x x 4 … 20 mA with HART
1 1 x x x x x x 0 … 20 mA

Tab. 25 Allocation and values of the “Signal range” channel parameter

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Channel parameter: smoothing factor of channel 0 … 3

Function

4828 + m* 64 + 31 m = module number (0 … 47)
number
Description Setting of the smoothing factor for the individual channels of the analogue input

module:

– With the smoothing factor, malfunctions can be suppressed.

– Calculation of the smoothing factor: arithmetic mean value from n values
Allocation Bit 0 … 1: Smoothing factor of channel 0

Bit 2 … 3: Smoothing factor of channel 1

Bit 4 … 5: Smoothing factor of channel 2

Bit 6 … 7: Smoothing factor of channel 3
Values è Tab. 27.

Tab. 26 Description of the “Smoothing factor of channel 0 … 3” channel parameter

Allocation and values 4828 + m* 64 + 31 (m = module number)
Bit 7 6 5 4 3 2 1 0 Channel Smoothing factor

x x x x x x 0 0 Channel 0 Inactive
x x x x x x 0 1 Smoothing over 2 values
x x x x x x 1 0 Smoothed over 4 values
x x x x x x 1 1 Smoothing over 8 values
x x x x 0 0 x x Channel 1 Inactive
x x x x 0 1 x x Smoothing over 2 values
x x x x 1 0 x x Smoothed over 4 values
x x x x 1 1 x x Smoothing over 8 values
x x 0 0 x x x x Channel 2 Inactive
x x 0 1 x x x x Smoothing over 2 values
x x 1 0 x x x x Smoothed over 4 values
x x 1 1 x x x x Smoothing over 8 values
0 0 x x x x x x Channel 3 Inactive
0 1 x x x x x x Smoothing over 2 values
1 0 x x x x x x Smoothing over 4 values
1 1 x x x x x x Smoothing over 8 values

Tab. 27 Allocation and values of the “Smoothing factor” channel parameter

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Channel parameter: IEEE variable of channel 0 … 3

Function
number

4828 + m* 64 + 32
(HART variable 1, HART variable 2)

m = module number (0 … 47)

4828 + m* 64 + 33
(HART variable 3, HART variable 4)

Description For each HART variable in the process image, the channel and source can be

determined:
– HART variables can be set individually for each channel.
– To use the HART variables: set the DIL switch è Chap. 7.3.

Allocation Bit 0, 1 Source of HART variable 1 or HART variable 3

Bit 2, 3 Channel of HART variable 1 or HART variable 3
Bit 4, 5 Source of HART variable 2 or HART variable 4
Bit 6, 7 Channel of HART variable 2 or HART variable 4

Values è Tab. 29, Tab. 30.

Tab. 28 Description of “IEEE variable of channel 0 … 3” channel parameter

Allocation and values 4828 + m* 64 + 32 (m = module number)
Bit 7 6 5 4 3 2 1 0 HART variable 1, HART variable 2

x x x x x x 0 0 Source of HART variable 1 = PV (presetting)
x x x x x x 0 1 Source of HART variable 1 = SV
x x x x x x 1 0 Source of HART variable 1 = TV
x x x x x x 1 1 Source of HART variable 1 = QV
x x x x 0 0 x x Channel of HART variable 1 = channel 0 (presetting)
x x x x 0 1 x x Channel of HART variable 1 = channel 1
x x x x 1 0 x x Channel of HART variable 1 = channel 2
x x x x 1 1 x x Channel of HART variable 1 = channel 3
x x 0 0 x x x x Source of HART variable 2 = PV (presetting)
x x 0 1 x x x x Source of HART variable 2 = SV
x x 1 0 x x x x Source of HART variable 2 = TV
x x 1 1 x x x x Source of HART variable 2 = QV
0 0 x x x x x x Channel of HART variable 2 = channel 0 (presetting)
0 1 x x x x x x Channel of HART variable 2 = channel 1
1 0 x x x x x x Channel of HART variable 2 = channel 2
1 1 x x x x x x Channel of HART variable 2 = channel 3

Tab. 29 Allocation and values of “IEEE variable of HART variable 1, HART variable 2” channel

parameter

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Allocation and values 4828 + m* 64 + 33 (m = module number)
Bit 7 6 5 4 3 2 1 0 HART variable 3, HART variable 4

x x x x x x 0 0 Source of HART variable 3 = PV (presetting)
x x x x x x 0 1 Source of HART variable 3 = SV
x x x x x x 1 0 Source of HART variable 3 = TV
x x x x x x 1 1 Source of HART variable 3 = QV
x x x x 0 0 x x Channel of HART variable 3 = channel 0 (presetting)
x x x x 0 1 x x Channel of HART variable 3 = channel 1
x x x x 1 0 x x Channel of HART variable 3 = channel 2
x x x x 1 1 x x Channel of HART variable 3 = channel 3
x x 0 0 x x x x Source of HART variable 4 = PV (presetting)
x x 0 1 x x x x Source of HART variable 4 = SV
x x 1 0 x x x x Source of HART variable 4 = TV
x x 1 1 x x x x Source of HART variable 4 = QV
0 0 x x x x x x Channel of HART variable 4 = channel 0 (presetting)
0 1 x x x x x x Channel of HART variable 4 = channel 1
1 0 x x x x x x Channel of HART variable 4 = channel 2
1 1 x x x x x x Channel of HART variable 4 = channel 3

Tab. 30 Allocation and values of “IEEE variable of HART variable 3, HART variable 4” channel

parameter

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Module parameter: Fail-Safe channel 0 … 3

Function
number

Access to this module parameter is made via protocol-specific functions
è Description for the bus node.

Description Channel-specific determination as to which signal status the outputs have during

fieldbus communication errors.
Fail-Safe can be defined for the entire terminal CPX via the “Fail-Safe” system
parameter è Description of system CPX.

Parameterisation of “Fault-Mode of channel x”

Depending on the fieldbus protocol, “Fault-Mode” is parameterised as follows:
– By setting a parameter bit (e.g., for CPX-FB11)
– By setting all parameter bits of the pertinent work to “Hold Last State” or

“Fault State” (e.g. for CPX-FB13)

Parameterisation of “Fault State of channel x”

The desired output word must be mapped in the “Fault State” parameter bits of the
respective channel.

Values Fault-Mode of channel 0 … 3:

0 = Hold Last State
1 = Fault State (presetting)
Fault State of channel 0 … 3:
0 = Reset value (presetting)
1 = Set value

Tab. 31 Description of “Fail-Safe of channel 0 … 3” module parameter

Module parameter: Idle-Mode channel 0 … 3

Function
number

Access to this module parameter is made via protocol-specific functions
è Description for the bus node.

Description Channel-specific determination as to which signal status the outputs have during

the call of the idle function.
Idle-Mode can be defined for the entire terminal CPX via the “System Idle-Mode”
system parameter è Description of system CPX.

Parameterisation of “Idle-Mode of channel x”

“Idle-Mode” is parameterised by setting a parameter bit.

Parameterisation of “Idle State of channel x”

The desired output word must be mapped in the “Idle State” parameter bits of the
respective channel.

Values Idle-Mode of channel 0 … 3:

0 = Hold Last State
1 = Fault State (presetting)
Idle State of channel 0 … 3:
0 = Reset value (presetting)
1 = Set value

Tab. 32 Description of “Idle-Mode of channel 0 … 3” module parameter

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Module parameter: forcing of channel 0 … 3

Function
number

Access to this module parameter is made via protocol-specific functions

è Description for the bus node.
Description With the forcing function, the digital input and output values can be influenced

independently of the actually pending input and output signal.

Forcing can be defined for the entire terminal CPX via the “Force Mode” system

parameter è Description of system CPX.

Parameterisation of “Force-Mode of channel x”

Depending on the fieldbus protocol, “Force-Mode” is parameterised as follows:

– By setting a parameter bit (e.g., for CPX-FB11)

– By setting all parameter bits of the pertinent word to “blocked” or “Force State”

(e.g. for CPX-FB13)

Parameterisation of “Force State of channel x”

The desired output word must be mapped in the “Force State” parameter bits of the

respective channel.
Values Force-Mode of channel 0 … 3:

0 = Disabled (presetting)

1 = Force State

Force State of channel 0 … 3:

0 = Reset value (presetting)

1 = Set value

Tab. 33 Description of the “Forcing of channel 0 … 3” module parameter

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8.5 Data format and range of values of the actual values

8.5.1 Data format

The data format determines how the actual values (analogue values) are transferred by terminal CPX to
the control system.

Data format

Input data
field
Value VZ1)Digital input value

1) VZ = sign (0 = positive, 1 = negative)

Tab. 34 Data format of the module CPX-4AE-4AA-H

– Range of values -32768 … 0 … 32767

D15 D14

MSB

D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

LSB

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8.5.2 Input 4 … 20 mA - fixed data format

– Measuring range 4 … 20 mA
– Data format: sign + 15 bits
– Data format not scalable
– Conversion of analogue actual value to the digital input value:

Digital input value + (Actual value * 4)

27648

16

Actual value Digital input value Significance

> 22.81 mA 32767 Overflow

22.81 mA 32511 End of the measuring range
> 20 mA 27649 … 32511 Overdrive range
4 … 20 mA 0 … 27648 Nominal range
< 4 mA -1 … -4864 Underdrive range

1.19 mA -4864 End of the measuring range

Tab. 35 Range of values for fixed data format (input 4 … 20 mA)

8.5.3 Input 4 … 20 mA – scalable data format

– Measuring range 4 … 20 mA
– Scalable data format -32768 … 0 … 32767
– Scaling above the lower and upper limit value
– Use of the limit values for diagnostics
– Conversion of the current values 1.19 … 22.81 mA (for sufficiently scaled data range)
– Overflow or underflow for values outside of the data range for actual values (> 22.81 mA

or < 1.19 mA) or digital input value (> 32767 or < -32768)

– Conversion of analogue actual value to the digital input value:

Digital input value + (Actual value * 4)

Upper limit value * Lower limit value

16

) Lower limit value

To perform complete diagnostics: do not scale the measuring range above the complete
data range.

Actual value Digital input value Significance

4 … 20 mA -32768 … 32767 Nominal range, freely scalable
< 1.19 mA -32768 Underflow

Tab. 36 Range of values for scalable data format (input 4 … 20 mA)

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8.5.4 Input 0 … 20 mA – fixed data format

– Measuring range 0 … 20 mA
– Data format not scalable
– No underflow: actual values < 0 mA not possible (reverse polarity protection)
– Conversion of analogue actual value to the digital input value:

Digital input value + Actual value

27648

20

Actual value Digital input value Significance

23.52 mA 32511 End of the measuring range
> 20 mA 27649 … 32511 Overdrive range
0…20 mA 0 … 27648 Nominal range
< 0 mA – Underflow not possible:

reverse polarity protection

Tab. 37 Range of values for fixed data format (input 0 … 20 mA)

8.5.5 Input 0 … 20 mA – scalable data format

– Measuring range 0 … 20 mA
– Scalable data format -32768 … 0 … 32767
– Scaling above the lower and upper limit value
– Use of the limit values for diagnostics
– Conversion of the current values 0 … 23.52 mA (for sufficiently scaled data range)
– Overflow or underflow for values outside of the data range (> 32767 or < -32768)
– No underflow: actual values < 0 mA not possible (reverse polarity protection)
– Conversion of analogue actual value to the digital input value:

Digital input value + Actual value

Upper limit value * Lower limit value

20

) Lower limit value

Actual value Digital input value Significance

> 23.52 mA (hysteresis < 23.42 mA) 32767 Overflow
0 … 20 mA -32768 … 32767 Nominal range, freely scalable
< 0 mA < -32768 Underflow not possible:

reverse polarity protection

Tab. 38 Range of values for scalable data format (input 0 … 20 mA)

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8.5.6 Output 4 … 20 mA – fixed data format

– Range of values 4 … 20 mA
– Data format not scalable
– Current value output 0 … 22 mA
– Current value output in case of overflow (> 22 mA): 22 mA
– Current value output in case of underflow (< 0 mA): 0 mA
– Conversion of the digital output value to the analogue setpoint value (current value output)

Current value + 4 ) 16

Digital output value

27648

Digital output value Current value output Significance

> 31104 22 mA Overflow
31104 22 mA End of output range
27649 … 31104 > 20 mA Overdrive range
0 … 27648 4 … 20 mA Nominal range

-1 … -6912 < 4 mA Underdrive range

-6912 0 mA End of output range
< -6912 0 mA Underflow

Tab. 39 Range of values in case of fixed data format (output 4 … 20 mA)

8.5.7 Output 4 … 20 mA – scalable data format

– Range of values -32768 … 0 … 32767
– Scalable data format -32768 … 0 … 32767
– Scaling above the lower and upper limit value
– Use of the limit values for diagnostics
– Current value output 0 … 22 mA (for sufficiently scaled data range)
– Current value output in case of overflow (> 22 mA): 22 mA
– Current value output in case of underflow (< 0 mA): 0 mA
– Conversion of the digital output value to the analogue setpoint value (current value output)

Current value + 4 ) 16

Digital output value * Lower limit value

Upper limit value * Lower limit value

Digital output value Current value output Significance

> 32767 22 mA Overflow

-32768 … 0 … 32767 4 … 20 mA Nominal range, freely

scalable

< -32768 0 mA Underflow

Tab. 40 Range of value for scalable data format (output 4 … 20 mA)

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8.5.8 Output 0 … 20 mA – fixed data format

– Range of values 0 … 20 mA
– Data format not scalable
– Current value output in case of overflow (> 22 mA): 22 mA
– Current value output in case of underflow (< 0 mA): 0 mA
– Conversion of the digital output value to the analogue setpoint value (current value output)

Current value + 20

Digital output value

27648

Digital output value Current value output Significance

> 30413 22 mA Overflow
30413 22 mA End of output range
27649 … 30413 > 20 mA Overdrive range
0 … 27648 0 … 20 mA Nominal range
0 0 mA End of output range
< 0 0 mA Underflow

Tab. 41 Range of values in case of fixed data format (output 0 … 20 mA)

8.5.9 Output 0 … 20 mA – scalable data format

– Range of values 0 … 20 mA
– Data format scalable from -32768 … 0 … 32767
– Scaling above the lower and upper limit value
– Use of the limit values for diagnostics
– Current value output in case of overflow (> 22 mA): 22 mA
– Current value output in case of underflow (< 0 mA): 0 mA
– Conversion of the digital output value to the analogue setpoint value (current value output)

Current value + 20

Digital output value * Lower limit value

Upper limit value * Lower limit value

Digital output value Current value output Significance

> 32767 22 mA Overflow

-32768 … 0 … 32767 0 … 20 mA Nominal range,
freelyscalable

< -32768 0 mA Underflow

Tab. 42 Range of values for scalable data format (output 0 … 20 mA)

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8.6 Scaling the range of values

For the scalable data format, the range of values can be scaled by setting the limit values. To process
the diagnostics correctly, the distance between both limit values should amount to at least 100

1. Set the “linear scaling” data format è Tab. 18.

2. Set the limit values for each channel è Tab. 20, Tab. 21.
The limit values represent the scaling end values:
– When the upper limit value is positive, set the upper limit value before setting the lower limit

value.

– If the upper limit value is negative, set the lower limit value before setting the upper limit value.

Example: scaling appropriate for a pressure sensor

The sensor linearly converts the measuring range 0 … 6 bar to analogue current values 0 … 20 mA.

Actual value (example) Digital input value Significance

0 mA 0 Lower limit value
10 mA 3000 Value in nominal range
20 mA 6000 Upper limit value
22 mA 6600 Limit value exceeded

Tab. 43 Example of scaling and limit monitoring for a pressure sensor

dec

.

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9 Diagnostics

9.1 General remarks

Specific errors of the analogue module are reported or suppressed dependent on the module
parameterisation è Tab. 16.
The monitoring of the errors can be activated or deactivated independently of each other.
Active monitoring has the following effect:

è The error is sent to the CPX bus node.
è The module error LED and channel error LED light up.

The representation of errors in the bus nodes depends on the bus protocol è Description
of bus nodes.
A further possibility for diagnostics is the operator unit CPX-MMI. The operator unit
displays the error messages in clear text è Description of operator unit CPX-MMI.

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9.2 Error messages

Error

Error description Error elimination

number

2 Short circuit or overload at the input or

1)

output

– The behaviour in case of short

circuit/overload and the error

1. Check the cables and connected
devices. Replace defective cables and
devices.

2. Switch voltage on again.

elimination measures depend on the
parameterisation of the “Behaviour
after short circuit/overload” module
parameter.

– Parameter description è Tab. 17.

3 Wire break (idling) of current input or

current output

1)

– Only for signal range 4 … 20 mA

 Check the cables and connected

devices. Replace defective cables and
devices.

– Input: IIN < 1.2 mA
– Output: no signal is present.
– Parameter description è Tab. 19.

9 Lower limit value undershot

– The parameterised lower limit value has

1)

 Check analogue input.
 Check parameterised limit value.

been undershot.

– Parameter description è Tab. 19.

10 Upper limit value exceeded

– The parameterised upper limit value has

1)

 Check analogue input.
 Check parameterised limit value.

been exceeded.

– Parameter description è Tab. 19.

29 Error in parameterisation

– Parameterisation is implausible.

1)

 Reparameterise with valid

parameters è Chap. 8.5.

– The previous parameter setting of the

channel is kept.

60 Overflow/underflow

– The actual value or setpoint value lies

outside of the measuring range or
displayable range of values.

2)

 Check analogue input.
 Check the cables and connected

devices. Replace defective cables
anddevices.

– Parameter description è Tab. 19.

100 Configuration error

– The DIL switch is incorrectly set.

1) The module displays the error depending on the parameterisation. The digital input values are processed again.

2) The diagnostics are output with the first recorded input value and kept until valid input values have been recorded for at least

200 ms.

 Correct the setting of the DIL switch

è Chap. 7.3.

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Error

Error eliminationError description

number

121 Limit value according to NAMUR NE43

exceeded

 Check analogue input.

 Reparameterise with valid parameters.
– Only for signal range 4 … 20 mA
– Input: IIN 21.00 mA
– Parameter description è Tab. 18.

122 Limit value according to NAMUR NE43

undershot

 Check analogue input.

 Reparameterise with valid parameters.
– Only for signal range 4 … 20 mA
– Input: IIN 3.6 mA
– Parameter description è Tab. 18.

1) The module displays the error depending on the parameterisation. The digital input values are processed again.

2) The diagnostics are output with the first recorded input value and kept until valid input values have been recorded for at least

200 ms.

Tab. 44 Error messages of the analogue module

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9.3 LED indicator

1 Module error indicator (red LED) è Tab. 45.
2 Channel error indicator (red LED) è Tab. 46.
3 Channel status indicator of input è Tab. 47.
4 Channel status indicator of output è Tab. 48.

Fig. 18 LED indicator of analogue module

The display of errors can be suppressed during parameterisation è Tab. 16, Tab. 19.

Module error indicator

LED (red) Description

Error-free operation

Off

Module error
– All channel-specific errors

Lights up

Tab. 45 Indicator: module error LED

– Parameterisation errors of hysteresis è Tab. 17.
– The DIL switch is incorrectly set.

1

234

Channel error indicator

Each channel is assigned an LED.

LED (red) Description

Error-free operation

Off

Channel-specific errors è Tab. 44.

Lights up

Tab. 46 Indicator: channel error LED

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Channel status indicator of input

The LEDs 0 … 3 (green) indicate the status of the individual channels.

LED (green)

Description

Channel inactive or active as output

Off

Channel active as input:
– Signal range 4 … 20 mA with HART

Flashes

– HART communication error-free
Channel active as input

Lights up

Tab. 47 Indicator: status LED for channel status of input

Channel status indicator of output

The LEDs 0 … 3 (yellow) indicate the status of the individual channels.

LED (yellow) Description

Channel inactive or active as input

Off

Channel active as output:
– Signal range 4 … 20 mA with HART

Flashes

– HART communication error-free
Channel active as output

Lights up

Tab. 48 Indicator: status LED for channel status of output

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10 Technical data

Technical data of terminal CPX è Description of system CPX.

Feature

Dimensions (Length x Width x Height) [mm] 107 x 50 x 70, including interlinking block

Product weight, including interlinking [g] 78
Type of mounting On interlinking block
Ambient temperature [°C] -5…50
Storage temperature [°C] -20…70
Air humidity (non-condensing) [%] 95
Degree of protection to EN 60529 Depending on connection block
Electromagnetic compatibility To EN 61000-6-2/-4
CE marking

(Declaration of conformity è www.festo.com/sp)

Note on materials RoHS compliant
Information on materials
– Housing PA reinforced

Tab. 49 General technical data

Specification/value

and connection block

In accordance with EU explosion
protection guideline (ATEX)
In accordance with EU EMC Directive

PC

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Feature Specification/value

Power supply

Nominal operating voltage [V DC] 24
Operating voltage range [V DC] 18 … 30
Intrinsic current consumption at nominal

[mA] Typically 170, max. 200
operating voltage
Electrical connection – M12 4-pin

– Spring-loaded terminal
– Screw terminal

Reverse polarity protection – For operating voltage

– Per channel for inputs and outputs

Analogue current channels

Quantity 4, selectable as inputs or outputs
Signal range [mA] – 0 … 20 without HART

– 4 … 20 without HART

– 4 … 20 with HART
Repetition accuracy at 25°C [%] 0.05
Operating error limit related to the ambient

[%] ± 0.3
temperature range
Basic error limit at 25°C [%] ± 0.1

Analogue inputs

Input resistance [Ω] 300
Open circuit voltage [V DC] Max. 28.8
Short circuit current [mA] Max. 22
Available sensor voltage [V] Min. 20.7 at 20 mA
Sensor cable length [m] Max. 500 (screened)
Electrical isolation between channels None
Electrical isolation between channel

Yes
and internal bus
Fuse protection (short circuit) Per channel

Analogue outputs

Load resistance [Ω] Max. 750

Tab. 50 Electrical data

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Index

A

Actuator, Connection scenarios, 27
HART actuator, Connection scenarios, 27
Address space, 29

C

Channel error LED, 55
Channel parameters
– IEEE variable, 42
– Lower limit value, 36
– Monitoring, 35
– Signal range, 40
– Smoothing factor, 41
– Upper limit value, 37
Connection block, 9

M

Module components, 9
Module error LED, 55
Module identifier, 11
Module parameter
– Behaviour after short circuit/overload, 34
– Data format, 34
– Diagnostics according to NAMUR NE43, 34
– Fail-safe, 44
– Force, 45
– HART repetition, 38
– Hysteresis of limit monitoring, 38
– Idle mode, 44
– Monitoring of parameterisation errors, 33
– Monitoring the CPX module, 33

D

DIL switch, 18

E

Electronics module, 9

H

HART variables
– Channel parameters, 42
– DIL switch, 19
– Process image, 30

I

Interlinking block, 9

L

LED
– Channel error LED, 55
– Module error LED, 55
– Status LED, 56

P

Pin allocation
– Connection block, 21
– Terminal connection block, 22
Process image, 29

S

Status LED, 56

T

HART transmitter, Connection scenarios, 26
Transmitter, Connection scenarios, 26

Festo – CPX-4AE-4AA-H – 2017-12 English 59

Copyright:
Festo AG & Co. KG
Ruiter Straße 82
73734 Esslingen
Germany

Phone:
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Fax:
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