Ladder Diagram Is Graphical Based Programming In Industrial Controller Such As Plc. We Use Ladder Diagram Programming For Making A Function Block. A User Defined Function Block Performs A Specific Task Or Set Of Tasks Within A Defined Program.

Structured Text Is A High-Level Programming Language Like C++, C# Etc. The Structured Text Language Used For Making A Program For Complex Process. Structured Text Language Is Statement And Conditional Based Language Where You Define Your Function To Run A Process.

String Comparison Instructions Used For Comparing Two Or More Than Two Input Strings, If The Result Of The Comparison Is True, Than Output Is Set To True Otherwise Output Is False.

A User Defined Function Block Performs A Specific Task Or Set Of Tasks Within A Defined Program. You Can Define Your Function Blocks By Structured Programming Languages, Ladder Programming, Function Block Diagram Etc.

CASE_OF Is A Control Flow Statement That Used For Execute Different Statement Of Code Based On The Value Of The Selector Or Expression. CASE_OF Is An Alternative Of Multiple If-Else-If Statements. CASE_OF Easy To Understand. Basic Syntax Of CASE_OF Statement Is A Selector Or Expression To Be Evaluated Based On Result Label Select.

A String Is A Sequence Of Characters That Represents Text Data. In PLC Programming, Strings Are Used To Store And Manipulate Textual Data Such As Messages, Key, Alarm Messages, Security Key Etc. For Storing String, We Use String Data Type. The Data Type STRING Consists Of A Series Of Up To 32767 ASCII Characters.

In Studio Three Type Of Timer Available In Structured Text Timer On Delay With Reset (TONR), Timer Off Delay With Reset (TOFR) And Retentive Timer On With Reset (RTOR). These Timer Unit Is 1msec. In Structured Text These Three Timer Available As Statements With Have Some Input And Output Parameter Such As Preset Value, Accumulator Value, Timer Reset Etc.

In Structured Text You Can Use Timer As Function. Working Of Timer Is Same As Ladder Logic But In Structured Text Parameter Of Timer Is Defined As Function. So In Timer Function Have Some Parameter Like IN (Input) Input Start The Timer Operation, PT (Preset Time) Value For Timer Operation, Q (Output) And ET (Elapsed Time) Current Value Of Timer.

TIA Portal (Totally Integrated Automation Portal) Is A Software Platform Developed By Siemens For Programming And Configuring Of PLC, HMI, Drives, And Other Devices. TIA Portal Is A Complete Package For Configuring And Programming These Devices.

Elementary Data Types Is A Basic Data Types In Panasonic PLC. These Data Types Used To Represent Simple Values Such As Numbers, String, And Boolean Values. They Are The Basic Building Blocks Of More Complex Data Structures And Are Used To Define Variables And Constants In A Program.