SIEMENS
5/15
Siemens NC 62 · 2016
5
SINAMICS S120 drive system
Communication
PROFINET
■
Overview
PROFINET is the innovative, open Industrial Ethernet standard
(IEC 61158) for the industrial automation environment. With
PROFINET, devices can be linked up from the field level through
to the management level.
PROFINET enables system-wide communication, supports
plant-wide engineering and applies IT standards right down to
the field level. IT communication, data communication and
cyclic process communication are combined on the basis of
Industrial Ethernet.
Existing fieldbus systems such as PROFIBUS can also be simply
integrated without having to change existing devices.
■
Design
PROFINET device concept
PROFINET distinguishes between the controller and its assigned
devices. These are initialized and parameterized by the control-
lers on power-up. The controller and its devices together consti-
tute a PROFINET I/O system (compare master/slave system for
PROFIBUS).
For PROFINET, cyclic communication between an IO Controller
and its IO Devices is performed in the same way as for
PROFIBUS over the process image. The process image is
updated cyclically. Depending on the requirements and device
characteristic, this takes place in real-time (RT, devices are
typically distributed IO Devices) or isochronous real-time (IRT,
devices are typically servo drives). Further, PROFINET permits
communication between the controllers and devices of different
IO systems.
PROFINET IO with RT for simple standard drive applications
With typical cycle times between 4 ms and 10 ms,
PROFINET IO with RT offers the same performance characteris-
tics as PROFIBUS as regards cyclic data transmission.
With this performance level, all standard drive applications
belonging to PROFIdrive application categories 1 to 3 can be
automated, i.e. those categories requiring the specification of
speed, torque and current setpoints or target positions which
do not need to be linked isochronously.
G_D211_XX_00050
Flexibility
Efficiency
Performance
Your advantages at a glance
Large quantity structures
High precision
Fast start-up
Expandability
Redundancy
Web tools
High transmission rate
Easy cabling
Open standard
Ruggedness/stability
Fast device replacement
Device/network diagnostics
Energy efficiency
Flexible topologies
Safety
Speed
One cable for all purposes
Industrial Wireless LAN
Increased productivity
Optimal use of
resources
Tailor-made plant concepts
G_IK10_XX_10304
PROFINET
SINAMICS drives
SINAMICS drives
I/O controller:
e. g.
SIMATIC S7
I/O
IO
devices
G_D211_EN_00052a
© Siemens AG 2016