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PLC System Start-Up and Program Test
4.6
System Start-Up
The following section contains:
•
Notes on configuring a system with important regulations which must be observed in order to
avoid hazardous situations.
•
The description of the system startup procedure.
4.6.1
Suggestions for Configuring and Installing the Product
A programmable controller is often used as a component in a larger system. The suggestions
contained in the following warning are intended to help you safely install your programmable
controller.
Warning
•
Adhere to any safety and accident-prevention regulations applicable to your situation
and system.
•
If your system has a permanent power connection (stationary equipment) that is not
equipped with an isolating switch and/or fuses that disconnect all poles, install either a
suitable isolating switch or fuses in the building wiring system. Connect your system to a
ground conductor.
•
Before start-up, if you have units that operate using the main power supply, make sure
that the voltage range setting on the equipment matches the local main power voltage.
•
When using a 24 V supply, be sure to provide proper electric isolation between the main
supply and the 24-V supply. Power supply units must be manufactured in accordance
with DIN VDE 0551/EN 60742 and DIN VDE 0160.
•
Fluctuations or deviations of the supply voltage from the rated value may not exceed
the tolerance limit specified in the technical data. If they do, functional failures or
dangerous conditions can occur in the electronic modules or equipment.
•
Take suitable measures to make sure that programs that are interrupted by a voltage
dip or power failure resume proper operation when the power is restored. Make sure
that dangerous operating conditions do not occur even momentarily. If necessary, force
an EMERGENCY OFF.
•
EMERGENCY OFF devices must be in accordance with EN 60204/IEC 204 (VDE 0113) and
be effective in all operating modes of the equipment. Be sure to prevent any
uncontrolled or undefined restart when the EMERGENCY OFF devices are released.
•
Install power supply and signal cables so that inductive and capacitive interference can
not affect the automation functions.
•
Install your automation system and its operative components so as to prevent
unintentional operation.
•
Automation equipment can assume an undefined state in the case of a wire break in the
signal lines. To prevent this, take the proper hardware and software safety measures
when linking the inputs and outputs of the automation equipment.
4-14
S5-115U Manual
EWA 4NEB 811 6130-02b
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