Omron CS1W-SLK11-21 - 06-2004 Manual page 192

routing table
RS-232C interface
RS-422 interface
scan
scan time
self diagnosis
series
servicing
set
set value
software error
software protect
software switch
Special I/O Unit
SRAM
subroutine
SV
synchronous execution
syntax
Glossary
be changed. However, the program or data can be read as many times as de-
sired.
Tables of settings that specify what networks a device is a member of and what
nodes must be passed through to reach other specific networks. See local net-
work table and relay network table.
An industry standard for serial communications.
An industry standard for serial communications.
The process used to execute a ladder-diagram program. The program is ex-
amined sequentially from start to finish and each instruction is executed in turn
based on execution conditions. The scan also includes peripheral processing,
I/O refreshing, etc. The scan is called the cycle with CV-series PLCs.
The time required for a single scan of a ladder-diagram program.
A process whereby the system checks its own operation and generates a
warning or error if an abnormality is discovered.
A wiring method in which Units are wired consecutively in a string. In Link Sys-
tems wired through Link Adapters, the Units are still functionally wired in se-
ries, even though Units are placed on branch lines.
The process whereby the PLC provides data to or receives data from external
devices or remote I/O Units, or otherwise handles data transactions for Link
Systems.
The process of turning a bit or signal ON.
The value from which a decrementing counter starts counting down or to which
an incrementing counter counts up (i.e., the maximum count), or the time from
which or for which a timer starts timing. Set value is abbreviated SV.
An error that originates in a software program.
A means of protecting data from being changed that uses software as opposed
to a physical switch or other hardware setting.
See memory switch.
A Unit that is designed for a specific purpose. Special I/O Units include Position
Control Units, High-speed Counter Units, Analog I/O Units, etc.
Static random access memory; a data storage media.
A group of instructions placed separate from the main program and executed
only when called from the main program or activated by an interrupt.
Abbreviation for set value.
Execution of programs and servicing operations in which program execution
and servicing are synchronized so that all servicing operations are executed
each time the programs are executed.
The form of a program statement (as opposed to its meaning). For example,
the two statements, LET A=B+B and LET A=B*2 use different syntaxes, but
have the same meaning.
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