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Learning targets. The participant should ... ... Understand the difference between absolute and symbolic addressing ... Understand the difference between local and global symbols ... Be able to watch global symbols in the PLC tag table ... Be able to edit a global symbol table.

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Presentation Transcript
Learning targets
Learning targets

The participant should ...

... Understand the difference between absolute and symbolic addressing

... Understand the difference between local and global symbols

... Be able to watch global symbols in the PLC tag table

... Be able to edit a global symbol table


Plc tags local tags
PLC tags / local tags

PLC tags Local tags

Scope of validity • Validthroughout the complete CPU • Only valid within the block in

• Can be used by all blocks which they have been defined

• The designation is unique • The same designation can be within the CPU used in different blocks for different purposes.

Application • PLC tags • Local tags - I/O signals - Block parameters - Bit memories - Static data of a block - Temporary data

Location of • PLC tags table • Block interface

definition

Representation • PLC tags are presented in • Local tags are presented quotation marks preceded by # Example: "Max" Example: #Niels



Create plc tags with group functions

+

Create PLC tags with group functions



Sort plc tags
Sort PLC tags

With a mouse click in the first row of the "Name" column, the table is sorted according to name.


Monitor plc tags
Monitor PLC tags

Monitor allon / off




Plc tags fault
PLC tags: fault

This address is already used by another tag

The entered address does not correspond to the data type of the tag

If the name already exists in the table, a "_1" is automatically appended.



Block editor symbol selection
Block editor: Symbol selection

The selection of symbols offered is intelligently restricted after each letter is entered to the corresponding symbols of the PLC tag table and the local tags


Block editor rename individual tag
Block editor:Rename individual tag

The changes take immediate effect throughout the entire program.


Block editor rewire individual tag
Block editor:Rewire individual tag

The changes take immediate effect throughout the entire program.



Exercise 5 2 complete plc tags for conveyor model
Exercise 5-2: libraryComplete PLC tags for conveyor model

"Horn"

(Q 8.7)

"K_Conv_RIGHT" (Q 8.5)

"K_Conv_LEFT" (Q 8.6)

"Bay1"

(I 8.5)

"Bay2"

(I 8.6)

"Bay3"

(I 8.7)

"LB"

(I8.0)

"T_Bay1"

(I 8.1)

"T_Bay2"

(I 8.2)

"T_Bay3"

(I 8.3)

"T_Bay-LB"

(I 8.4)

"L_Bay1"

(Q 8.1)

"L_Bay2"

(Q 8.2)

"L_Bay3"

(Q 8.3)

"L_Bay-LB"

(Q 8.4)


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