Festo CPX-FB33 User manual

CPX(-M)-FB33/34/35/43/44/45
Bus node
Operating instruc-
tions
548760
2022-05f
[8161796]

Translation of the original instructions
PI PROFIBUS PROFINET® is a registered trademark of its respective trademark holder in certain
countries.

Festo — CPX(-M)-FB33/34/35/43/44/45 — 2022-05f
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Table of contents
1 About this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Applicable documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Product version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Training of qualified personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Additional information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.1 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4.2 Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2.1 Product design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2.2 Product variants. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4.2.3 LED displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2.4 Control elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.5 Connecting elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1 General information about installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.2 Connecting to the network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.3 Ensuring the degree of protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.4 Power supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1 Setting up PROFINET communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2 Setting up MQTT communication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 Parameterisation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1 Bus node parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
9 Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.1 Diagnostics options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.2 Diagnostics via LED displays. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.2.1 Network status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
9.2.2 CPX terminal status - LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
9.3 Diagnostics via status bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
9.4 Diagnostics via the I/O diagnostics interface (STI). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.5 Diagnostics via CPX-MMI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.6 Diagnostics via CPX-FMT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.7 Diagnostics via PROFINET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9.8 Diagnostics via MQTT telegrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.8.1 Replacement markers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
9.8.2 Telegrams with template selection 0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
10.2 Network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

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Safety
1 About this document
1.1 Applicable documents
All available documents for the product è www.festo.com/sp.
Document Contents
CPX system description CPX-SYS-... Detailed information on the CPX terminal
Brief instructions for bus node Essential information on the product
Operating instructions for bus node Detailed information on the product
Tab. 1: Applicable documents
1.2 Product version
This document refers to the following hardware version of the specified product:
Product Version
CPX-FB33 Bus node CPX-FB33 from revision 07
CPX(-M)-FB34 Bus node CPX(-M)-FB34 from revision 07
CPX(-M)-FB35 Bus node CPX(-M)-FB35 from revision 07
CPX-FB43 Bus node CPX-FB45 from revision 45
CPX(-M)-FB44 Bus node CPX(-M)-FB45 from revision 45
CPX(-M)-FB45 Bus node CPX(-M)-FB45 from revision 45
Tab. 2: Product versions
Information on the revision levels of the product è 4.2.2 Product variants.
There may be an updated version of this document for this or later product versions
è www.festo.com/sp.
2 Safety
2.1 Safety Instructions
–Only use the product in original status without unauthorised modifications.
–Only use the product if it is in perfect technical condition.
–Observe labelling on the product.
–Store the product in a cool, dry, UV-protected and corrosion-protected environment. Ensure that
storage times are kept to a minimum.
–Before working on the product, switch off the power supply and secure it against being switched on
again.
–This product can generate high frequency malfunctions, which may make it necessary to implement
interference suppression measures in residential areas.
–Comply with the handling specifications for electrostatically sensitive devices.

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Product overview
5
2.2 Intended use
The bus node is intended for operation as a station (IO Device) in the Industrial Ethernet system
PROFINET IO.
When the additional Message Queuing Telemetry Transport (MQTT) function is activated, the bus node
can be used as a gateway between Industrial Ethernet networks and an on-premise MQTT broker.
The product may only be used in combination with the CPX Terminal in an industrial environment.
2.3 Training of qualified personnel
This description is intended exclusively for technicians trained in control and automation technology,
who have experience in installation, commissioning, programming and diagnostics of programmable
logic controllers (PLC) and fieldbus systems.
3 Additional information
–Contact the regional Festo contact if you have technical problems è www.festo.com.
–Accessories and spare parts è www.festo.com/catalogue.
4Product overview
4.1 Function
The bus node as a device in a PROFINET IO network establishes the connection to the higher-order
controller. The PROFINET communicates in real-time with the Real-Time Protocol (RT) or the Isochro-
nous Real-Time Protocol (IRT). The switch integrated in the bus node enables division of the network
into several segments. The number of segments in the network can be increased with the use of
additional switches and routers.
The bus node can be used in two different operating modes:
–Remote I/O
–Remote controller
Particular functions are only available from a specific revisionè 4.2.2 Product variants.
Priority start-up (Fast Start-up)
The Prioritised Start-up function is also referred to as "fast start-up" or "fast restart" and ensures a
fast start-up of the CPX terminal.
Requirements for using the function Fast Start-up:
–Intermediate switches and routers must must also support the Fast Start-up function.
Fast Start-up can be combined with the Remote I/O operating mode.
Deactivation of the crossover function speeds up the Fast Start-up function.
The Fast Start-up function is switched over in the control software at two configuration levels:
–Basic hardware configuration in the properties for the CPX terminal
–CPX terminal configuration with allocation of the configuration table

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Product overview
Identification & Maintenance (I&M)
This function serves as an electronic rating plate and offers uniform, manufacturer-independent access
to device-specific online information over the internet.
PROFIenergy
The function supports targeted shut-off of consumers that are not required in order to reduce the
power demand.
Media Redundancy Protocol (MRP)
Redundant PROFINET communication can be set up with MRP. Ring topology increases the reliability of
high-availability networks.
Media Redundancy for Planned Duplication (MRPD)
Redundant PROFINET communication can be set up with MRPD. The ring topology means that there is
no time delay due to switchover times.
S2 system redundancy
The bus node maintains communications with two redundant controllers. In the event of communica-
tion faults with the primary controller, the system switches automatically to the standby connection.
Crossover detection (Crossover Detection)
The function supports the use of patch cables and crossover cables in the same system.
• The product can be connected to the network or a PC using either a patch cable or crossover cable.
• The crossover detection function must be activated in the control software if patch and crossover
cables are used in the same system.
Message Queuing Telemetry Transport (MQTT)
MQTT enables specific data to be read from valve terminals, e.g. asset data, diagnostic data and status
messages of the CPX terminal and the valve terminal. The data are transmitted via a second communi-
cation channel of the bus node in parallel and without impairing the PROFINET communication.
The following safety aspects must be observed:
–The MQTT telegrams are not transmitted under real-time conditions.
–The contents of the MQTT telegrams should not be used for process-critical decisions.
–MQTT telegrams may contain confidential data and are not encrypted. Therefore, MQTT data and the
connection to the broker may only be transmitted over private/local networks.
–The process data telegrams transmitted via MQTT are only snapshots. Not all I/O cycles of the
PROFINET are transferred.
Device description file
A device description file in XML format (GSDML) is required for configuration and programming of the
CPX terminal. The GSDML contains all the information required for configuring and setting up the CPX
terminal using control software.

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Product overview
7
The current GSDML file is required to be able to use all functions of the bus node.
The current GSDML file for CPX terminals is located in the Festo Support Portal:
è www.festo.com/sp
Consult your local Festo repair service if you have any questions or technical problems.
4.2 Structure
4.2.1 Product design
11
22
3
3
3
3
4
4
5
5
6
6
Fig. 1: Connection and display elements
1LED displays
2Memory card, only for FB33/34/35
3Network connection
4DIL switches
5Service interface
6Product labelling
4.2.2 Product variants
The following software and hardware revisions are a prerequisite for using the functions:
Function Bus bus node revision number
Software Hardware
Priority start-up (Fast Start-up) from Rev 12 from Rev 11
Identification & Maintenance
(I&M)
from Rev 14 from Rev 1

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Product overview
Function Bus bus node revision number
Software Hardware
PROFIenergy from Rev 20 from Rev 1
Media Redundancy Protocol
(MRP)
from Rev 20 from Rev 1
Media Redundancy for Planned
Duplication (MRPD)
from Rev 50 from Rev 45
S2 system redundancy from Rev 50 from Rev 45
Isochronous real time (IRT) from Rev 21 from Rev 1
Message Queuing Telemetry
Transport (MQTT)
from Rev 53 from Rev 45
Tab. 3: Required revision numbers for using the functions
The bus nodes CPX(-M)-FB33/34/35 do not support MQTT.
The revision numbers of the hardware and software for the bus node can be checked with the control
software, the Festo Maintenance Tool (FMT) or the Festo Field Device Tool (FFT).
4.2.3 LED displays
LED Network status LEDs LED CPX-specific LEDs
NF Network Failure, red PS Power System, green
M/P Maintenance/PROFIenergy,
green or yellow
PL Power Load, green
TP1 Link/Traffic 1, green SF System Failure, red
TP2 Link/Traffic 2, green M Modify, yellow
Tab. 4: LEDs on the bus node

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Product overview
9
4.2.4 Control elements
1
2
3
Fig. 2: Control elements for PROFINET
1
Memory card
2
DIL switch: operating mode
3
DIL switch: diagnostics mode
DIL switches
A bus node must be operated as a master in the CPX terminal. The "Remote I/O" operating mode must
be set on this bus node. The "Remote Controller " operating mode must be set on all other bus nodes.
The [2] DIL switch is used to set the operating mode :
DIL switch [2] Description
Factory setting:
1: OFF
2: OFF
Remote I/O operating mode
All functions of the CPX terminal are controlled by the PROFINET
IO controller.
1: ON
2: OFF
Remote controller operating mode
A CPX-CEC-xx takes over the I/O open-loop control. Requirement:
CPX Terminal with CEC.
Tab. 5: Setting the operating mode
The diagnostics mode or the data field size is set with the [3] DIL switch depending on the operating
mode:
DIL switch [3] Description
Remote I/O Remote controller
Factory setting:
1: OFF
2: OFF
Diagnostics switched off. Data field size:
8 bytes I/8 bytes O
1: OFF
2: ON
Status bits switched on. Data field size:
16 bytes I/16 bytes O

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Product overview
DIL switch [3] Description
Remote I/O Remote controller
1: ON
2: OFF
I/O diagnostics interface
switched on.
Data field size:
32 bytes I/32 bytes O
1: ON
2: ON
Position is reserved. Position is reserved.
Tab. 6: Setting the diagnostics mode
Reserved DIL switches are blocked for future functions and must not be used.
The setting of the DIL switches for operating mode and diagnostics mode must match the settings in
the open-loop control.
Memory card
The bus nodes CPX-(M)-FB43/44/45 do not support memory cards.
The memory card holds configuration data for the PROFINET addressing:
–Fieldbus device name
–IP address
The configuration data can be transferred to the new bus node with the memory card when replacing a
bus node.
The data on the memory card have priority over other configuration data. e.g. data stored in the bus
node memory or in the control system.
NOTICE
Malfunction or Damage to the Memory Card.
Inserting or removing the memory card while the power supply is switched on can result in malfunc-
tions of or damage to the memory card.
• Disconnect the power supply before you insert or remove the memory card.
The various bus node revisions are only compatible with the corresponding memory card:
Memory card Bus bus node revision number
CPX-SK from Rev 07
CPX-SK-2 from Rev 12
CPX-SK-3 from Rev 30
Tab. 7: Compatibility of the memory cards depending on the bus node revision

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Product overview
11
4.2.5 Connecting elements
Pin allocation of the network interface of the bus node CPX-FB33/43
Bushing Pin Signal Explanation
M12, D-coded 1 TD+ Transmitted data (Transmit Data) +
2 RD+ Received data (Receive Data) +
3 TD– Transmitted data –
4 RD– Received data –
Housing Shield/FE Shielding/functional earth
Tab. 8: Network interface of the bus node CPX-FB33/43
Pin allocation of the network interface of the bus node CPX-M-FB34/44
Bushing Pin Signal Explanation
RJ45, Push-pull 1 TD+ Transmitted data (Transmit Data) +
2 TD– Transmitted data –
3 RD+ Received data (Receive Data) +
4 n.c. not connected
5 n.c. not connected
6 RD– Received data –
7 n.c. not connected
8 n.c. not connected
Housing Shield/FE Shielding/functional earth
Tab. 9: Network interface of the bus node CPX-M-FB34/44
Pin allocation of the network interface of the bus node CPX-M-FB35/45
Bushing Pin Signal Explanation
SCRJ, Push-pull 1 TX Transmitted data
2 RX Received data
Tab. 10: Network interface of the bus node CPX-M-FB35/45

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Product overview
Overview of connections and plug
Bus node Connection technology Network connectors
CPX-FB33/43 2 x M12, D-coded, female, 4-pin, in
accordance with IEC 61076-2
NECU-MS-D12G4-C2-ET
CPX-M-FB34/44 2 x RJ45, push-pull, Cu, AIDA,
in accordance with IEC 60603,
IEC 61076-3
FBS-RJ45-PP-GS
CPX-M-FB35/45 2 x SCRJ, push-pull, 650 nm, AIDA, in
accordance with IEC 61754-24
FBS-SCRJ-PP-GS
Tab. 11: Connection technology and network connectors
In the following table, the cable lengths were used in accordance with the specifications for PROFINET
networks.
Network connectors Cable specification
NECU-MS-D12G4-C2-ET Ethernet cable, shielded, Cat 5/5e, 6 … 8 mm, 0.14 … 0.75 mm2;
max. 100 m PROFINET end-to-end link: 22 AWG
FBS-RJ45-PP-GS Ethernet cable, shielded, Cat 5/Cat 5e, 5 … 8 mm,
0.13 … 0.36 mm2 ≙ ca. 26 … 22 AWG;
max. 100 m PROFINET end-to-end link: 22 AWG
FBS-SCRJ-PP-GS POF fibre-optic cable, 980/1000 µm, 6.5 … 9.5 mm;
max. 50 m PROFINET end-to-end link; ≤ 12.5 dB
Tab. 12: Cable specification for network connectors
Service interface
An operator unit such as CPX-MMI-1 can be connected to the service interface.
Alternatively, the service interface can be connected to a PC via the USB adapter NEFC-M12G5-0.3-
U1G5 so that the "Festo Maintenance Tool" software (FMT) can be used.

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Assembly
13
5 Assembly
The bus node is mounted in an interlinking block of the CPX terminal.
1
2
3
Fig. 3: Mounting the bus node in an interlinking
block
1
Screws
2
CPX bus node
3
Interlinking block
–Before working on the product, switch off the power supply and secure it against being switched on
again.
–CPX-M-FB35/45 only permissible on metal linking.
Disassembly
1. Unscrew screws.
2. Carefully lift the bus node.
Assembly
1. Check seal and sealing surfaces and insert the bus node.
2. Screws must be placed so that the self-tapping threads are used. Tighten the screws by hand
cross-wise.
Tightening torque: 0.9 … 1.1 Nm.
Use suitable screws for the interlinking block.
• Plastic interlinking block: thread-grooving self-tapping screws.
• Metal interlinking block: screws with metric thread.

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Installation
6 Installation
6.1 General information about installation
Comply with the handling specifications for electrostatically sensitive devices.
Information on mounting the CPX terminal can be found in the CPX system description CPX-SYS-….
6.2 Connecting to the network
Installation guidelines
Observe the installation guidelines of the PROFINET user organisation (PNO):
è www.profibus.com
NOTICE
Unauthorised Access to the Device Can Cause Damage or Malfunction.
• When connecting the device to a network, protect the network from unauthorised access.
Standards for security in information technology can be used for network protection measures, e.g.
IEC 62443, ISO/IEC 27001.
An access password only protects against unintentional modification.
For additional information è Guidelines and standards for security in information technology, e. g.
IEC 62443, ISO/IEC 27001.
Use of switches and routers
The switch integrated in the bus node enables division of the network into several segments.
The network can be divided into additional segments with the use of additional switches and routers.
This makes it possible to structure the network and expand the network.
Regardless of the network structure, the expansion of a PROFINET segment must not exceed certain
connection lengths:
–Copper connecting cable, Ethernet twisted pair cable, 22 AWG:
max. 100 m between network participants, PROFINET end-to-end link
–Optical connecting cable, POF fibre-optic cable, max. 12.5 dB signal attenuation over the entire
connecting section:
max. 50 m PROFINET end-to-end link.
6.3 Ensuring the degree of protection
–Use connection hardware with the required degree of protection.
–Use cover caps to seal unused connections.

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Commissioning
15
Connection Connecting hardware Cover cap
CPX-FB33/43:
Network connection with M12 plug
Plug: NECU-M-S-D12G4-C2-ET ISK-M12
CPX-M-FB34/44:
Network connection with RJ45 plug
Plug: FBD-RJ45-PP-GS CPX-M-AK-C
CPX-M-FB35/45:
Network connection with SCRJ plug
Plug: FBD-SCRJ-PP-GS
Service interface Connecting cable: KV-M12-M12-… ISK-M12
Tab. 13: Examples of the connection technology and cover caps for degree of protection IP65/IP67
6.4 Power supply
Bus nodes are supplied with power via the interlinking blocks.
If there are problems with the power supply è 9 Diagnostics.
7 Commissioning
7.1 Setting up PROFINET communication
NOTICE
Malfunction due to incorrect switch-on sequence.
• First switch on the operating voltage supply of all network stations and then the operating power
supply of the open-loop control.
CPX- M-FB34: cyclical process data exchange can freeze in exceptional cases in applications with
increased electrostatic load.
This results in an entry in the diagnostic memory with error number FN150.
• Restart to ensure normal operation.
•Reduce electrostatic charges in the vicinity of the product or use a CPX Terminal with metal inter-
linking.
1. Define the operating mode and diagnostic mode with the DIL switches of the bus node.
2. Set up the automation project for the higher-order controller using suitable software.
3. Import the device description file into the software è www.festo.com/sp.
4. Configure the CPX Terminal in the software:
–System structure
–Network addressing
–Address allocation of the modules
5. Transfer the automation project to the higher-order controller.

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Commissioning
Behaviour of the display elements of the bus node during commissioning in the CPX Terminal
LED Status LED Status
NF off PS on
M/P off PL on
TP1 on SF off
TP2 on M off
Tab. 14: Behaviour of the display components after error-free commissioning
Information on troubleshooting in the event of incorrect behaviour è 9 Diagnostics.
7.2 Setting up MQTT communication
Requirement: the feature must be activated. This can be checked via the web server.
1. Set up the automation project for the higher-order controller using suitable software è 7.1
Setting up PROFINET communication.
2. Import the device description file into the software è 7.1 Setting up PROFINET communication.
3. Select MQTT from the list of submodules.
4. Add MQTT to the bus node as a submodule.

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Parameterisation
17
5. Configure MQTT in the software:
–Broker
A broker is configured via the IP address, the port and a keepalive time. Up to three brokers
can be configured for load balancing. If multiple brokers are configured, a broker is randomly
selected for every connection attempt. If a broker is not to be used, the IP address 0.0.0.0 or
port 0 must be assigned. MQTT communication requires at least one configured broker.
–Template selection
The template selection defines which telegrams are to be sent. The default template selection
has the number 0 and contains the Online, Offline, Asset, Diag, Process, Process_Module and
Will telegrams.
–Section from the process image
–Topic-Prefix
The Topic-Prefix defines a character string that is inserted before the topic of each MQTT
message sent.
–Client Identifier
The Client Identifier consists of up to 23 characters. If the Large Client Identifier option is
enabled, the Client Identifier can be expanded up to 128 characters. The Large Client Identifier
option may only be activated if the broker used supports it.
–Retain-Flag
The Retain-Flag option causes the MQTT server to save the last published message for each
topic. As a result, other clients receive these messages immediately after subscribing to a topic
without having to wait for the next update.
–Use saved configuration
This option ignores all configuration settings and instead uses the configuration stored in the
device.
6. Transfer the automation project to the higher-order controller è 7.1 Setting up PROFINET commu-
nication.
7. Start the web server and check the configuration and status via the MQTT page.
8 Parameterisation
The behaviour of the CPX terminal can be set individually by parameterisation. The following parame-
terisation variants are distinguished:
–System parameterisation, e.g. deactivating error messages
–Module and channel-specific parameterisation, e.g. module monitoring, settings for errors, adjust-
ment of debouncing times for inputs
–Parameterisation of the diagnostic memory
The following parameterisation options are available:
–Parameterisation of the CPX terminal with PROFINET engineering software
–Parameterisation with the operator unit
–Parameterisation via the Festo Maintenance Tool

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Parameterisation
Detailed description of the specific parameters and basic principles for application è CPX system
description CPX-SYS-….
Parameter lists of the various CPX modules è Descriptions of the modules.
8.1 Bus node parameters
Bus node parameters Description/setting options
Standard CPX parameters
–SCS monitoring
–SCO monitoring
–Monitoring UOUT
–Monitoring UVAL
–SCV monitoring
–Fail-safe
–Force mode
–System start with external parameters or
default parameters or with saved parameters.
–Diagnostic memory
Standard CPX parameters – for further informa-
tion è CPX system description CPX-SYS-…
Note
The parameters of the diagnostic memory can
only be set via the CPX-MMI or CPX-FMT.
Device-specific parameters
Diagnostic message filter
Undervoltage UOUT/UVAL
–Only available for bus nodes from Rev 14.
–Displayed in the hardware configuration (HW
Config) as "Filter Alarm Uoff/Uven".
–Inactive:
Undervoltage is reported via the network
–Active:
Undervoltage messages are filtered and not
reported over the network è the under-
voltage is only indicated by the flashing SF
LED on the bus node.
Channel alarm filter
Undervoltage UOUT/UVAL
–Only available for bus nodes from Rev 20.
–Displayed in the hardware configuration (HW
Config) as "Filter channel alarms Uoff/Uven".
–Inactive:
Undervoltage is reported via the network.
–Active:
Undervoltage messages are filtered è a max-
imum of one message per module is sent over
the network; the undervoltage is additionally
displayed by the flashing SF LED on the bus
node.

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Parameterisation
19
Bus node parameters Description/setting options
Filter for combining channel alarms (channel
bundling)
–Only available for bus nodes from Rev 20.
–Inactive:
Channel alarms are reported individually via
the network.
–Active:
Channel alarms, e.g. as a result of short circuit
or undervoltage, are summarised and trans-
mitted as a common message over the net-
work; the error is also displayed by the corre-
sponding flashing LED on the bus node.
Analogue process value representation/byte
sequence
Special bus node parameter in Intel/Motorola
format - defines the representation of process
values of the analogue modules - setting
options:
–Byte Order Intel, LSB-MSB, "Little Endian";
Factory setting: process values are displayed
in Intel format. The least significant bit is on
the right and the most significant bit on the
left.
–Byte order Motorola, MSB-LSB, "Big Endian":
process values are displayed in Motorola
format. The most significant bit is on the right
and the least significant bit on the left.
This parameter can also be set via the I/O diag-
nostic interface using function number 4402 in
bit 7:
–Value "0": Intel, LSB-MSB; factory setting
–Value "1": Motorola, MSB-LSB
The setting of the byte sequence depends on
the control system and the associated user pro-
grams: select the byte sequence used in the con-
trol system.
Tab. 15: Bus node parameters
Also consider the set bus node parameters in the user programs, in particular the byte sequence.
If the bus node of an earlier revision is used, the parameters are displayed in the software, but cannot
be set.

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Diagnostics
9 Diagnostics
9.1 Diagnostics options
Depending on the configuration the following options for diagnostics are available in the context of
PROFINET:
–LED display
–Status bits
–I/O diagnostics interface
–Diagnostics via CPX-MMI
–Diagnostics via CPX-FMT
–Diagnostics via PROFINET
–Diagnostics via MQTT Topics
The displayed diagnostic information is dependent on the settings of the è DIL switches on the bus
node as well as on the parameterisation of the CPX terminal or the controller.
9.2 Diagnostics via LED displays
Various status LEDs are available for diagnostics at the bus node. They show hardware errors, configu-
ration errors and bus errors directly on site, which enables fast error detection.
9.2.1 Network status LEDs
NE – Network Status/Network Error
LED Sequence Status Error handling
LED is off
No error, if the PS LED is green. –
LED flashes
Network connection not OK -
possible causes:
Check:
–Only before initial start-up:
Configuration defective,
e.g. MAC-ID not configured.
–Configuration
–Device name or device
number not correct.
–Device name
–Device number
–IO controller defective. –IO controller
–Network connection inter-
rupted, short-circuited or dis-
turbed.
–Network connection
Tab. 16: Network status LED NE