Siemens SIMATIC CP 340 User Manual page 194

Glossary
Online Help
STEP 7 provides you with the option of having context-dependant help texts displayed on
the screen while you are working with the programming software.
Online/Offline
When you are online there is a data connection between the programmable controller and
programming device, when you are offline there is no data connection between them.
Operand
An operand is part of a STEP 7 instruction and states with which unit the process should
execute something. It can be addressed both absolutely and symbolically.
Operating mode
The SIMATIC S7 programmable controllers have three different operating modes: STOP,
START-UP and RUN. The functionality of the CPU is different in the various operating
modes.
Operating system of the CPU
The operating system of the CPU organizes all the functions and process of the CPU that
are not connected to a special control task.
Parameterization
Parameterization refers to the setting of a module's behavior.
Parameters
Parameters are values that can be allocated. There are two different types of parameters:
block parameters and module parameters.
Point-to-point communication
In point-to-point communication the communications processor forms the interface between
a programmable controller and a communication partner.
Procedure
Procedure refers to the process of a data transmission according to a specific protocol.
194
PtP coupling and configuration of CP 340
Manual, 04/2011, A5E00369892-03