Siemens SIMATIC S7-1500 Equipment Manual page 28

Product overview
3.5 Firmware functions of the CPU
PROFINET IO
Function
RT (Real-Time) RT prioritizes PROFINET IO telegrams over standard telegrams. This
ensures the required determinism in the automation technology. In
this process the data is transferred via prioritized Ethernet telegrams.
IRT (Isochronous Real- A reserved bandwidth within the send clock is available for IRT data.
Time) The reserved bandwidth ensures that the IRT data can be transmitted
in time-synchronized intervals, unaffected by other high network
loading (e.g. TCP/IP communication or additional real time commu­
nication). Update times with maximum determinism can be realized
through IRT. Isochronous applications are possible with IRT.
Isochronous mode With isochronous mode, measured values and process data are
acquired and processed in a fixed system clock. Isochronous mode
thus contributes to high control quality and hence to greater manu­
facturing precision. Isochronous mode reduces possible fluctuations
of the process response times to a minimum. Time-assured pro­
cessing makes higher machine cycles possible.
With SIMATIC Drive Controller, the clock pulse systems of SINAMICS
Integrated, PROFINET (X150) and the technology I/Os (X142) can be
coupled together isochronously.
MRP (Media Redund­ It is possible to establish redundant networks via the Media Redund­
ancy Protocol) ancy Protocol. Redundant transmission links (ring topology) ensure
that an alternative communication path is made available if a trans­
mission link fails. The PROFINET devices that are part of this redund­
ant network form an MRP domain.
RT operation is possible with the use of MRP.
MRPD (Media Redund­ The advantage of the MRP extension MRPD is that, in the event of a
ancy with Planned failure of a device or a line in the ring, all other devices continue to be
Duplication) supplied with IO data without interruption and with short update
times.
MRPD is based on IRT and MRP. To realize media redundancy with
short update times, the PROFINET devices participating in the ring
send their data in both directions. The devices receive this data at
both ring ports. This eliminates the reconfiguration time of the ring.
Shared device The "Shared device" function allows you to divide the modules or sub­
modules of an IO device up among different IO controllers. Numerous
IO controllers are often used in larger or widely distributed systems.
Without the "Shared device" function, each I/O module of an IO
device is assigned to the same IO controller. If sensors that are phys­
ically close to each other must provide data to different IO controllers,
several IO devices are required. The "Shared device" function allows
the modules or submodules of an IO device to be divided up among
different IO controllers, thus allowing flexible automation concepts.
You can,
for example, combine I/O modules that are physically close to each
other in one IO device.
PROFIenergy The vendor- and device-neutral profile defined by the PNO allows you
to significantly reduce your energy demand and costs. With PROFIen­
ergy you switch off unneeded loads. Thus, energy costs drop notice­
ably during production breaks. PROFIenergy provides an easy, auto­
mated way of switching technologically-related plant parts off and
on. Most of the energy savings comes from the process. The
PROFINET device itself contributes only a few watts to the savings
potential.
28
Description Additional information
PROFINET function manual
(https://support.industry.
siemens.
com/cs/ww/en/view/499488­
56)
SIMATIC Drive Controller
Equipment Manual, 11/2022, A5E46600370-AC