Glossary - Omron DeviceNet DST1 Series Operation Manual

Glossary

Term
idle data
assembly
safety data
error latch time
open type
connection
configuration
single channel
standard
safety controller (safety PLC)
safety chain
safety protocol
safety signature
test pulse
dual channel
Dual Channel Complementary
Dual Channel Equivalent
Busoff
DeviceNet Safety
discrepancy time
EPI
multi-cast connection
single-cast connection
TUNID
UNID
Data sent when the originating application is in an inexecutable state.
Internal data in a device gathered as one group to be accessed externally.
Data with high reliability.
The time period to hold an error state (control data, status data, and LED
indications).
The open method for Safety Connection. One of three types is selected in the
settings of a connection to the Safety Master.
A logical communications path used to communicate between devices.
The settings for a device and a network.
Using only one input or output as the input or output.
A device or device function to which safety measures are not applied.
A controller with high reliability used for the safety control.
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).
The communications hierarchy added to actualize highly reliable
communications.
A certificate of the configuration data issued to a device from the Network
Configurator. The device verifies that the configuration data is correct by using
the safety signature.
A signal used to detect external wiring coming into contact with the power supply
(positive) or short circuits between signal lines.
Using two inputs or outputs as the input or output for redundancy.
Setting to evaluate that two logic states are complementary.
Setting to evaluate that two logic states are equivalent.
Status that occurs when the error rate is extremely high over a communications
cable. An error is detected when the internal error counter exceeds a certain
threshold value. (The internal error counter is cleared when the Master is started
or restarted.)
A safety network that adds a safety protocol to DeviceNet to comply with
IEC61508 SIL3, EN954-1 Safety Category 4.
The time period from a change in one of two inputs until the other input changes.
The interval of safety data communications between the Safety Master and the
Safety Slave.
Safety I/O communications in a 1:n configuration (n = 1 top 15).
Safety I/O communications in 1:1 configuration .
The UNID of the local node. Usually the TUNID is set from the Network
Configurator.
A identifier to specify one device in all the network domains. Values combining
the network address and the node address are used.
Description
Glossary
13