Siemens SIMATIC PCS 7 OSx Manuel d'utilisateur télécharger pdf (Page 4)

Terms defined in glossary are in bold type.

Glossary-2

Tag that links the OSx database with a particular recipe area (a group of

recipe components such as ingredients and processes).

A field that represents specific data associated with a tag in the OSx

database, sometimes called a column. A typical database might, for

example, have a column that represents a loop process variable.

The acronym for American Standard Code for Information Interchange is a

widely-used system for encoding letters, numerals, punctuation marks, a nd

signsasbinarynumbers.

Tag parameter that determines whether the system generates a log

message when the associated attribute value changes in the database.

OSx feature that provides for an automatic transfer of the primary role to

a previously designated backup if the primary fails while the system is in

Operate state. For an automatic failover to work, a failover circuit (25-pin

ribbon connector and 24V power source) must have been installed between

the primary and the backup.

Parameter in the Event Preferences dialog box that determines whether

OSx goes to the Operate or Offline state at powerup.

The OSx station with the backup role assumes the role of primary if the

primary fails (failover). Only one supervisory station can be assigned

the backup role at a given time. You must have installed a failover circuit

before you designate an OSx station as the backup.

Process control by means of a recipe, which contains all the variables used

to make a product. The goal of batch processing is to use the same

equipment to make multiple “batches” of the same product or of different

products.

Language used in writing programs that control batches.

Tag that identifies a batch.

A program written in Batch Control Language (BCL) and used to

monitor and control batches.

A system using combinations of two symbols to represent things, such as

one and zero, true and false, or the presence or absence of voltage.

The smallest unit o f information in a computer, equivalent to a single zero

or one.

Area Tag

Attribute

ASCII

Autolog

Automatic Failover

Auto State

Transition

Backup Role

Batch

Batch Control

Language (BCL)

Batch Tag (BCH)

BCL Program

Binary Code

Bit

1 2 3 4 5 6 7 8 9 ... 16 17

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Siemens SIMATIC PCS 7 OSx Manuel d'utilisateur Page 4

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