Wieland samos, Руководство пользователя

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samos Safety System
12
© 2010 Wieland Electric GmbH | BA000256 | 12/2012 (Rev. I)
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OR function and muting function
The off signal of an input function can be bridged with an OR signal. For example, in setup
mode a safety function can be bridged using an enabling button; an OR operation can also
link two safety functions.
The muting function is a special case of the OR function. For example, muting sensors
allow a conveyor belt to transport material through a light curtain by briefly bridging the
light curtain function.
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
Bypass function
With a bypass signal the OFF signal of a Reset function (see page 47) can be changed into
an ON signal in the base module. Bypass is used when the system is to be switched on
after a power shutdown but a light barrier is obstructed by material. Bypass cancels the
safety function of the safety device, allowing the blockage to be cleared. In normal
operation the muting function bridges automatically (see above).
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
Reset function
The Reset function defines which (Reset) conditions must be fulfilled if, for example, an
ON signal is to be passed on to the Reset function output. All input and muting signals
from the base module and the associated input modules, and the bypass/OR signals from
the input modules are logically linked (AND/OR). The terminal configuration with bridges
and feedback circuits is also evaluated.
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
Enable function
The enable function enables the ON signal in the Reset function if there is H-level on the
EN input. The H-level for enabling can be generated, for example, by a semiconductor
output Q
n
on the base module for logic operations or a PLC output. For category 4
applications (EN ISO 13849-1) the module that generates the enabling signal must be in the
same enclosure. If the
EN input is open or on L-level the following Q
n
semiconductor
outputs are locked.
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
Output function
The time behavior of the safety ON/OFF signal is defined in the output function. Depending
on the function, you can set a off delay for outputs
Q3 or Q3/Q4 between 0 and 5 minutes
(depending on module version).
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Communication
With the communication function system data is exchanged between the different
modules in a system via the internal safety bus (SBus).
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Diagnosis and display function
The diagnosis function allows internal system data to be provided to external systems via a
diagnosis module or bus coupler module.
For detailed explanations of system functions and other hints and examples please refer to
the glossary on page 45ff.
OR
Muting
Bypass
Reset
Enable
Safety outputs
Diagnosis
NOTE