SIEMENS
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Siemens IK PI · 2015
PROFINET/Industrial Ethernet
Accessories
Time synchronization
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Overview
Introduction
In many applications it is becoming increasingly important to
synchronize the time in plants and systems. Only if all network
stations are supplied cyclically with a reliable time frame from a
central location can optimum process operation be ensured.
This results in benefits for the plant operator such as increased
operational reliability, the possibility of tracing system faults in a
targeted manner, increased economic efficiency due to fewer
production outages, and increased productivity in manufacture.
For this purpose, the SICLOCK product family offers a compre-
hensive range of optimally matched components for setting up
highly reliable time synchronization systems.
Typical industries and fields of application for time synchroniza-
tion systems are:
•
Factory/process automation
•
Power supply
•
Building automation
•
Transportation systems
•
Safety engineering
•
IT systems
The SICLOCK product range comprises the following product
groups:
•
Wireless receivers
•
Central plant clocks
•
Pulse converters
• Accessories
System description
Satellites or long-wave transmitters are used as primary
time sources. The SICLOCK wireless receivers (e.g.
SICLOCK GPS1000) receive these high-frequency signals
and transmit the demodulated time signal to the central plant
clock via a robust and interference-proof 2-wire connection.
The central plant clock converts the time signal into an Ethernet-
based network frame (e.g. NTP, SIMATIC procedure) and thus
provides all connected network stations with precise and uni-
form time information.
Furthermore, in the event of failure or loss of reception from
the primary time source, the central plant clock ensures stable
continuation of the clock time and tracking of the system time
without time jumps as soon as reception is restored.
SICLOCK TC400 central plant clock with SICLOCK GPS1000 wireless receiver
Outdoor installation
up to 4 independent Ethernet networks
Twin wire
max. 1 000 m
GPS satellite
SP01_00017
SIMATIC HMI
ETH4
ETH1
SICLOCK
GPS1000
SICLOCK
TC400
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Ethernet Switch
SCALANCE X
Industrial Ethernet
© Siemens AG 2014