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Function
PROFINET IO
System redundancy S2
Switched S1 device
RT (real time)
MRP (Media Redundancy
Protocol)
MRP interconnection
PROFIenergy
Integrated technology
Integrated closed-loop
control functionality
Controlling, measuring
and position detection
CPU 1518HF-4 PN (6ES7518-4JP00-0AB0)
Equipment Manual, 05/2021, A5E49868646-AA
Description
IO-Devices with S2 system redundancy enable uninter-
rupted operation during a primary backup switchover.
If the role of the CPUs changes, the new primary CPU
takes over the PROFINET IO communication.
The switched S1 device function of the CPU enables
operation of standard IO devices in the S7-1500R/H
redundant system.
RT prioritizes PROFINET IO frames over standard frames.
This ensures the required determinism in the automa-
tion technology. In this process the data is transferred
via prioritized Ethernet frames.
The Media Redundancy Protocol enables the configura-
tion of redundant networks. Redundant transmission
links (ring topology) ensure that an alternative commu-
nication path is made available if a transmission link
fails.
Within the PROFINET ring, the H-CPUs assume the role
of the MRP Manager following appropriate project con-
figuration and all other devices in the ring assume the
role of the MRP clients.
The process MRP interconnection is an enhancement of
MRP and allows redundant coupling of two or more
rings with MRP in PROFINET networks. MRP intercon-
nection is - like MRP - specified in the standard IEC
62439-2 (Edition 3).
PROFIenergy is a PROFINET-based data interface for
switching off consumers centrally and with full coordi-
nation during pause times regardless of the manufac-
turer or device type. Through this, the process should
only be provided with the energy that is absolutely
required. Most of the energy is saved by the process.
The PROFINET device itself only contributes a few watts
to the savings potential.
•
PID Compact (continuous PID controller)
•
PID 3Step (step controller for integrating actuators)
•
PID Temp (temperature controller for heating and
cooling with two separate actuators)
•
TO_BasicPos (control of a SINAMICS drive)
•
SSI_Absolute_Encoder (control of position detection
and measuring function of the TM PosInput tech-
nology module)
Product overview
2.3 Firmware functions
Additional information
•
Redundant System S7-1500R/H
(https://support.industry.siemens
.com/cs/ww/en/view/109754833)
System Manual
•
Function manual PROFINET
(https://support.industry.siemens
.com/cs/ww/en/view/49948856)
Redundant System S7-1500R/H
(https://support.industry.siemens.co
m/cs/ww/en/view/109754833) Sys-
tem Manual
Function manual PROFINET
(https://support.industry.siemens.co
m/cs/ww/en/view/49948856)
Function manual PID Control
(https://support.industry.siemens.co
m/cs/ww/en/view/108210036)
STEP 7 online help
15
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