Omron NX1P2 series

Terminology
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NX-series NX1P2 CPU Unit Hardware User’s Manual (W578)
Initial Value One of the attributes of a variable. The variable is set to the initial value in the fol-
lowing situations.
• When power is turned ON
• When the CPU Unit changes to RUN mode
• When you specify to initialize the values when the user program is transferred
• When a major fault level Controller error occurs
inline ST ST programming that is included within a ladder diagram program.
instruction The smallest unit of the processing elements that are provided by OMRON for use
in POU algorithms. There are ladder diagram instructions (program inputs and out-
puts), function instructions, function block instructions, and ST statements.
literal A constant expression that is used in a user program.
local variable A variable that can be accessed only from inside the POU in which it is defined.
“Local variable” is used as opposed to “global variable.”
Local variables include internal variables, input variables, output variables, in-out
variables, and external variables.
main memory The memory inside the CPU Unit that is used by the CPU Unit to execute the OS
and user program.
major fault level Controller error
An error for which all NJ/NX-series Controller control operations stop. The CPU Unit
immediately stops user program execution and turns OFF the loads for all slaves and
Units (including remote I/O).
MC Test Run A function to check motor operation and wiring from the Sysmac Studio.
memory used for CJ-series Units One type of I/O memory in an NX1P2 CPU Unit and NJ-series CPU Unit. It contains
addresses that can be directly specified by the user.
It can be accessed only with variables with an AT attribute. This memory is used to
access CJ-series Units and CJ-series networks.
However, you cannot connect the CJ-series Units to the NX1P2 CPU Units.
minor fault level Controller error An error for which part of the control operations for one of the function modules in
the NJ/NX-series Controller stop.
The NJ/NX-series CPU Unit continues operation even after a minor fault level Con-
troller error occurs.
Motion Control Function Module One of the function modules. The MC Function Module performs motion control
based on commands from the motion control instructions that are executed in the
user program.
motion control instruction A function block instruction that executes motion control.
The Motion Control Function Module supports instructions that are based on func-
tion blocks for PLCopen
®
motion control as well as instructions developed specifi-
cally for the Motion Control Function Module.
namespace A system that is used to group and nest the names of functions, function block defi-
nitions, and data types.
Network Publish One of the attributes of a variable.
This attribute allows you to use CIP message communications or tag data links to
read/write variables from another Controller or from a host computer.
NX bus The NX-series internal bus. An NX1P2 CPU Unit has the NX bus.
NX Bus Function Module One of the function modules. This function module controls NX Units attached to
the right side of the CPU Unit.
NX Units
Any of the NX-series Units that perform I/O processing with connected external
devices. The Communications Coupler Units are not included with the NX Units.
observation One of the event levels for Controller events or user-defined events.
These are minor errors that do not affect control operations, but appear in the event
log to notify the user of specific information.
partial fault level Controller error An error for which all of the control operations for one of the function modules in the
NJ/NX-series Controller stop.
An NJ/NX-series CPU Unit continues operation even after a partial fault level Con-
troller error.
Term Description