Omron SYSMAC CV Series Operation Manual page 606

clock pulse
clock pulse bit
comparison instruction
Completion Flag
condition
constant
control bit
control data
control signal
Control System
controlled system
count pulse
counter
CPU
CPU Backplane
CPU Bus Unit
CPU Rack
600
Glossary
A pulse available at specific bits in memory for use in timing operations. Various
clock pulses are available with different pulse widths, and therefore different fre-
quencies.
A bit in memory that supplies a pulse that can be used to time operations. Vari-
ous clock pulse bits are available with different pulse widths, and therefore differ-
ent frequencies.
An instruction used to compare data at different locations in memory to deter-
mine the relationship between the data.
A flag used with a timer or counter that turns ON when the timer has timed out or
the counter has reached its set value.
A symbol placed on an instruction line to indicate an instruction that controls the
execution condition for the terminal instruction. Each condition is assigned a bit
in memory that determines its status. The status of the bit assigned to each con-
dition determines the next execution condition. Conditions correspond to LOAD,
LOAD NOT, AND, AND NOT, OR, or OR NOT instructions.
An input for an operand in which the actual numeric value is specified. Constants
can be input for certain operands in place of memory area addresses. Some op-
erands must be input as constants.
A bit in a memory area that is set either through the program or via a Program-
ming Device to achieve a specific purpose, e.g., a Restart Bit is turned ON and
OFF to restart a Unit.
An operand that specifies how an instruction is to be executed. The control data
may specify the part of a word is to be used as the operand, it may specify the
destination for a data transfer instructions, it may specify the size of a data table
used in an instruction, etc.
A signal sent from the PC to effect the operation of the controlled system.
All of the hardware and software components used to control other devices. A
Control System includes the PC System, the PC programs, and all I/O devices
that are used to control or obtain feedback from the controlled system.
The devices that are being controlled by a PC System.
The signal counted by a counter.
A dedicated group of digits or words in memory used to count the number of
times a specific process has occurred, or a location in memory accessed
through a TC bit and used to count the number of times the status of a bit or an
execution condition has changed from OFF to ON.
See central processing unit .
A Backplane used to create a CPU Rack.
A special Unit used with CV-series PCs that mounts to the CPU bus. This con-
nection to the CPU bus enables special data links, data transfers, and process-
ing.
The main Rack in a building-block PC, the CPU Rack contains the CPU, a Power
Supply, and other Units. The CPU Rack, along with the Expansion CPU Rack,
provides both an I/O bus and a CPU bus.