Omron NE1A-EDR01, Operation Manual

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Glossary
cyclic connection One of the connection types for I/O communications in DeviceNet standard
communications.
For a cycle connection, data is sent after a set period of time elapses. A cyclic
connection enables sending data on a cycle that is different from the communi-
cations cycle of the Master.
DeviceNet A CIP-compliant network that uses CAN technology. DeviceNet is mainly used
as a field network to connect controllers, sensors, and other devices.
DeviceNet Safety A DeviceNet that complies with CIP Safety, i.e., IEC 61508 SIL3 and EN 954-1
Safety Category 4.
discrepancy time The time period from a change in one of two inputs until the other input
changes. When using a dual-channel input, a suitable time must be set
depending on the characteristics of the connected devices.
dual channel Using two inputs or outputs as the input or output for redundancy.
Dual Channel Complementary Setting to evaluate that two logic states are complementary.
Dual Channel Equivalent Setting to evaluate that two logic states are equivalent.
EPI An acronym for Expected Packet Interval.
The interval of safety data communications between the Safety Master and the
Safety Slave through an established connection.
error latch time The time period to hold an error state (control data, status data, and LED indi-
cations).
EtherNet/IP A CIP-compliant network that uses TCP/IP technology. EtherNet/IP can coexist
with other TCP/IP-based protocols in high-capacity, high-speed networks.
EtherNet/IP Safety An EtherNet/IP network that complies with CIP Safety, i.e., IEC 61508 SIL3
and EN 954-1 Safety Category 4.
explicit message connection A connection type for explicit messages in DeviceNet standard communica-
tions.
Fault Present Several function blocks have Fault Present as an optional output. This is an
error output that indicates that the applicable function block has detected an
internal logic error or an input data timing error.
multi-cast connection One of the connection types for DeviceNet Safety communications.
With a multi-cast connection, multi-cast input data can be sent from a Safety
Slave to up to 15 Safety Masters. This connection type can be set only for a
Safety Slave input. It cannot be set for outputs. This connection type enables
effective communications when sharing the data from one Safety Slave
between more than one Safety Master.
Network Configurator A software tool used to set networks and devices for CIP and CIP Safety.
node A generic name for devices to which addresses are allocated in a network.
Nodes are sometimes also called devices.
offline The state in which a device is not connected to the network or in which com-
munications are not possible because they have not been set from the Net-
work Configurator.
online The state in which communications through the network are possible.
open type The opening method for a safety connection. One of three types is selected in
the settings of a connection to the Safety Master. Refer to 5-1 Setting Safety
Connections in the
DeviceNet Safety System Configuration Manual (Cat. No.
Z905) for details.
• Configuring the target device
• Checking the safety signature
• Only opening
PFD An acronym for Probability of Failure on Demand.
Shows the average failure rate for a system or device demand. Used for calcu-
lating the SIL (Safety Integrity Level) for a safety system.
PFH An acronym for Probability of Failure per Hour.
Shows the failure rate per hour for a system or device. Used for calculating the
SIL (Safety Integrity Level) for a safety system.
Term Definition