Festo CPX-FB33 Operating Instructions Manual page 6

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.
6 Festo — CPX(-M)-FB33/34/35/43/44/45 — 2022-05f