Glossary – Banner EZ-SCREEN Safety Light Curtain Systems User Manual
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Glossary
The following terms are used in this manual. Where possible, definitions are from the U.S. and international product performance stand-
ards that govern the design of the Safety Controller. For more definitions, visit the online learning segment under Support and Training at
Automatic reset:
The safety input device control operation setting where the assigned Safety Output will automatically turn on when all of
its associated input devices are in the Run state. No manual reset operation is required for the Safety Output to turn on
when controlled only by safety input devices configured for Automatic Reset. When Automatic Reset is selected, the
input device may be said to be configured to run in Trip mode.
Change of state (COS):
The change of an input signal when it switches from Run-to-Stop or Stop-to-Run state. Dual-channel input signals, have
two possible configurable COS settings describe the signal disparity limits that can exist between channels before a
fault condition is registered: simultaneous and concurrent. If simultaneity is a requirement or a concern for the applica-
tion, the user has to ensure that he made the right selection during configuration.
Closed-Open debounce time:
Time to bridge a jittery input signal or bouncing of input contacts to prevent nuisance tripping of the Controller. Adjusta-
ble from 6 ms to 100 ms. Default is 50 ms for mute sensors, 6 ms for other devices. A longer closed-open debounce
time will also affect and increase the response time of the system and/or the machine response time.
Code validation:
The configuration code file inspection process automatically performed by the Controller to verify that the configuration
code has not been corrupted or altered in any way.
Commissioning:
The process of operationally checking a Safety Controller installation on a working machine, in order to verify that the
control system is working properly.
Complementary Contacts:
Two sets of contacts which are always in opposite states.
Concurrent:
The setting that permits an indefinite signal disparity between channels, without going into a fault condition. A fault con-
dition is created if the Stop signal changes back to a Run signal before its allied signal changes to the Stop state. Both
signals must change from the STOP state to the RUN state before the dual-channel device is considered to be in the
RUN state.
Configurable:
Describes a control device that has pre-defined and pre-tested operational parameters that can be selected or enabled,
in order to accommodate a variety of control application requirements.
Configuration:
A selected set of pre-defined and pre-tested input and output device properties and logic relationships that define the
operating algorithm that the Safety Controller uses to control hazardous machine motion.
Confirmation:
The two-step process where a new or modified configuration is sent to a Controller for code validation, and a copy of
the validated code is sent back from the Controller to the PCI for manual parameter (I/O and System settings) verifica-
tion.
Designated Person:
A person or persons identified and designated in writing, by the employer, as being appropriately trained and qualified
to perform a specified checkout procedure.
EZ-SCREEN® Type 2 Light Screen Instruction Manual
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