Microsoft SQL Server (MSSQL) is a relational database management system (RDBMS). it stores and retrieves data as request. in MSSQL data organized in table each table have row and column. MSSQL is easily connect with third party software by Data Source Name (DSN).A DSN is often used with ODBC (Open Database Connectivity).in an automation industries we use MSSQL to store tag value and application data

vbscript is a visual basic script used in wincc flexible for hmi programming and configuration. vbscript access hmi screen items to write and read screen items value. vb script is very help full to design HMI screen. vbscript also read and write tag value by using smart tags keyword.

A conditional statement in vbscript is used to perform different task or action which base on a specified condition is true or false. an if else is conditional statement which execute task or action if condition is true otherwise else condition is executed. you can use multiple if else statement within vbscript.

VBScript or visual basic script is a scripting language used for developing and designed of automation and scripting tasks. vb script is commonly used for scripting within HMI environments to automate repetitive tasks, such as tag values, visualization task, alarm handling, network error handling, administrative tasks etc.

trend in industrial application describe the changes in a variable with time. Siemens wincc flexible is used for design graphical user interface with multiple graphical tools like button, numerical input, label, slider, alarm, trend etc. Trend is used in industrial control system to know variation of variable values over time. you can use real time and historical trend to shows variation of value over time.

The alarm system allows you to display and record operating states and faults on the HMI device that are present or occur in a plant. alarm is very important for operator and process department for certain level. alarms help to run process safely and efficiently because problems are identified and addressed before they become more serious. Alarm is designed to triggered and acknowledged by operator when specific condition is occurred during process automation.

TIA Portal (Totally Integrated Automation Portal) is a software platform developed by Siemens for programming and configuring of PLC, HMI, drives, and other devices. siemens hmi are programmed and designed with Siemens TIA wincc.

It reduced human error and provides continues result of process or system. plc save fuel, cost, processing material, labor and increased production. below are some common question for plc asked in interview.

user function block designed to perform a specific task and can be called multiple times throughout a program, reducing redundancy and improving maintainability. Each plc programming have standard block like timer, counter, arithmetic, comparison block but user function block are made by programmer for use multiple time l

widget and tag permission allows only specific user to access widget action, event or wright value on tag. when you add wright permission for tag than only assigned user change value or wright value of tag. all other user not access these tag. security features is very important for industrial control system