Omron NE1A-SCPU01 - 07-2009 Operation Manual page 325

Term
poll connection
reaction time
safe state
safety chain
safety controller
safety network controller
safety data
safety function
safety network number
safety protocol
safety signature
single channel
single-cast connection
standard
Standard CPU Unit
test pulse
TUNID
UNID
Glossary
One of the connection types for I/O communications in DeviceNet standard
communications.
For a poll connection, output data is sent from the Master and Slaves that
receive the output date return input data. This connection type is used for
cyclic communications with Slaves that have both inputs and outputs.
The worst-case response time required to move the system to a safe state
after a safety input occurs (e.g., an emergency stop switch is pressed, a light
curtain is interrupted, or a safety door is opened) or a device fails. The system
reaction time includes the reaction time of sensors and actuators, just as it
includes the reaction time of controllers and networks.
The state of a component or device when the risk of human harm reduced to a
permissible level.
The logical chain to actualize a safety function, that consists of the input device
(sensor), the control device (including a remote I/O device), and the output
device (actuator).
A controller with high reliability used for safety control. A safety network con-
troller is a controller that is compatible with a safety network. Safety controllers
and safety network controllers are sometimes generically referred to as safety
PLCs.
Extremely reliable data, with the risk of human harm reduced to a permissible
level.
A function executed by a safety-related system to achieve a safe state for a
machine hazard.
A unique number set for a safety network. With CIP Safety, a system can be
built that included multiple networks. In this type of configuration, devices are
uniquely identified and mutually confirmed using a TUNID that combines the
network number and node address.
The Network Configurator automatically sets network numbers for communica-
tions. Network numbers can also be specified by the user.
The communications hierarchy added to actualize highly reliable communica-
tions.
A certificate of the configuration data issued to a device from the Network Con-
figurator. The device verifies that the configuration data is correct by using the
safety signature.
Using only one input or output as the input or output.
One of the connection types for DeviceNet Safety communications.
With a single-cast connection, a Safety Master and Safety Slave communica-
tions 1:1. This connection can be set for either an input or an output, and sep-
arate connections are needed for each.
In this manual, items used for general control purposes are called "standard" to
differentiate them from devices, functions, data, and other items for which
which safety measures have been applied.
A CPU Unit used for standard control, such as CPU Units in OMRON's CS or
CJ Series. This term is used to differentiate from Safety CPU Units.
A signal used to detect external wiring coming into contact with the power sup-
ply (positive) or short circuits between signal lines.
An acronym for Target Unique Network Network Identifier.
The TUNID is the UNID of the local node. The TUNID is automatically set
when configuring devices with the Network Configurator. The set TUNID is
saved in nonvolatile memory in the device and used in the future.
An acronym for Unique Network Network Identifier.
An ID used to uniquely identify once device in and configuration of multiple net-
works. The UNID consists of the Safety Network number and node address.
Definition
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