PLC Data Types & Input (I), Output (Q) & Memory (M) Addressing In TIA Portal | Bangla Tutorial 2024 скачать в хорошем качестве

PLC Data Types & Input (I), Output (Q) & Memory (M) Addressing In TIA Portal | Bangla Tutorial 2024

In PLC (Programmable Logic Controller) programming, data types define the kind of values a variable can hold. These data types vary slightly depending on the specific PLC manufacturer and programming environment, but most PLCs support a core set of data types. Here are the most common data types used in PLCs: 1. Boolean Type: BOOL Size: 1 bit Description: Represents a binary state, TRUE (1) or FALSE (0). Used for switches, relays, and status indicators. 2. Integer Types: SINT (Short Integer): 8-bit signed integer (-128 to 127) INT: 16-bit signed integer (-32,768 to 32,767) DINT (Double Integer): 32-bit signed integer (-2,147,483,648 to 2,147,483,647) LINT (Long Integer): 64-bit signed integer (large range) Description: Used for counters, timers, and integer calculations. 3. Unsigned Integer Types: USINT (Unsigned Short Integer): 8-bit unsigned integer (0 to 255) UINT: 16-bit unsigned integer (0 to 65,535) UDINT (Unsigned Double Integer): 32-bit unsigned integer (0 to 4,294,967,295) ULINT (Unsigned Long Integer): 64-bit unsigned integer (large range) Description: Similar to integers but only positive. Often used in applications where negative values aren’t needed. 4. Real (Floating Point) Type: REAL Size: 32-bit floating-point Description: Used for values requiring decimal points, like temperatures, flow rates, or other analog values. Follows IEEE-754 standard. 5. Double Real Type: LREAL (or DOUBLE) Size: 64-bit floating-point Description: Higher precision than REAL. Used when a larger range or more accuracy is required. 6. Time Type: TIME, TIME_OF_DAY, or DURATION Size: Varies depending on the PLC Description: Represents time intervals (e.g., duration in milliseconds) and is useful for timers and delays. 7. String Type: STRING Size: Varies, typically up to 255 characters Description: Holds alphanumeric text, such as labels, messages, or identifiers. 8. Date and Time Types: DATE, TIME, DATE_AND_TIME Description: Used for timestamping, scheduling, or logging events with date and time information. 9. User-Defined Types (UDT) Type: UDT (Structured Data Types) Description: Custom data structures defined by the programmer, grouping multiple data types into one structure. Useful for organizing related data like machine parameters or sensor information. 10. Arrays Type: ARRAY Description: A collection of elements of the same data type. For example, an array of integers to store sensor readings. 11. Enumeration (ENUM) Type: ENUM Description: Defines a list of named values. Useful for variables with a fixed set of states, such as modes of operation. Understanding and selecting the correct data types for PLC programming helps optimize performance and memory use, especially for complex applications.