Glossary

 

 

 

syntax

The form of a program statement (as opposed to its meaning).

syntax error

An error in the way in which a program is written. Syntax errors can include

 

‘spelling’ mistakes (i.e., a function code that does not exist), mistakes in specify-

 

ing operands within acceptable parameters (e.g., specifying read-only bits as a

 

destination), and mistakes in actual application of instructions (e.g., a call to a

 

subroutine that does not exist).

SYSMAC Support Software

A software package installed on a IBM PC/AT or compatible computer to func-

 

tion as a Programming Device.

system configuration

The arrangement in which Units in a System are connected. This term refers to

 

the conceptual arrangement and wiring together of all the devices needed to

 

comprise the System.

system error

An error generated by the system, as opposed to one resulting from execution of

 

an instruction designed to generate an error.

system error message

An error message generated by the system, as opposed to one resulting from

 

execution of an instruction designed to generate a message.

system setup

Operating environment settings for a Programming Device, e.g., the LSS or

 

SSS.

terminal instruction

An instruction placed on the right side of a ladder diagram that uses the final

 

execution conditions of an instruction line.

timer

A location in memory accessed through a TIM/CNT bit and used to time down

 

from the timer’s set value. Timers are turned ON and reset according to their

 

execution conditions.

TR area

A data area used to store execution conditions so that they can be reloaded later

 

for use with other instructions.

TR bit

A bit in the TR area.

trace

An operation whereby the program is executed and the resulting data is stored to

 

enable step-by-step analysis and debugging.

trace memory

A memory area used to store the results of trace operations.

transfer

The process of moving data from one location to another within the PC, or

 

between the PC and external devices. When data is transferred, generally a

 

copy of the data is sent to the destination, i.e., the content of the source of the

 

transfer is not changed.

transmission distance

The distance that a signal can be transmitted.

trigger

A signal used to activate some process, e.g., the execution of a trace operation.

trigger address

An address in the program that defines the beginning point for tracing. The

 

actual beginning point can be altered from the trigger by defining either a positive

 

or negative delay.

UM area

The memory area used to hold the active program, i.e., the program that is being

 

currently executed.

Unit

In OMRON PC terminology, the word Unit is capitalized to indicate any product

 

sold for a PC System. Most of the names of these products end with the word

 

Unit.

unit number

A number assigned to some Units to facilitate identification when assigning

 

words or other operating parameters.

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Omron CPM1A Syntax error, Sysmac Support Software, System configuration, System error message, System setup, Timer