Siemens Simatic M7-400 Manual do Utilizador descarregar pdf (Página 618)

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Glossary

Glossary-12

S7-400, M7-400 Programmable Controllers Module Specifications

A5E00069467-07

Non-isolated

In the case of non-isolated input/output modules, the reference potentials of the

control and load circuit are electrically connected.

³ Organization block

Organization block

Organization blocks (OBs) form the interface between the operating system of

the CPU and the user program. The order in which the user program is

processed is defined in the organization blocks.

Operating mode

The SIMATIC S7 programmable controllers have the following operating modes:

STOP, ³ STARTUP, RUN and STOP.

Operating system

The operating system of the CPU organizes all functions and processes of the

CPU that are not tied to a specific control task.

Parameters

1st tag of a ³ logic block

2nd tag for setting the characteristics of a module (one or more per module).

When delivered to the customer, each module has a practical basic setting for its

parameters, which the user can modify in STEP 7.

³ Programming device

PLC

³ Programmable controller

Point-to-point connection

Only two nodes are physically linked with one another in a point-to-point

connection. This type of communication link is used if the use of a

communication network is not recommended or when, for example, different

types of partners, such as a PLC and a process computer, are to be connected.

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