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SCL-cheat-sheet


Siemens S7 SCL cheat sheet
Conversion BOOL_TO_BYTE BOOL_TO_DWORD BOOL_TO_WORD BYTE_TO_DWORD BYTE_TO_WORD CHAR_TO_STRING DINT_TO_REAL INT_TO_DINT INT_TO_REAL WORD_TO_DWORD Class A

r />Numeric ABS SQR SQRT EXP EXPD LN LOG ACOS ASIN ATAN COS SIN TAN

Number Square Square Root e to the power IN 10 to the power IN Natural logarithm Common logarithm Arc cosine Arc sine Arc tangent Cosine Sine Tangent

Constants BOOL

FALSE TRUE BOOL#0 BOOL#1 B#16#00 B#16#FF BYTE#0 B#2#101 Byte#'a' b#16#f 'A' CHAR#49 'Address' W#16#0000 W#16#FFFF word#16#f WORD#8#177777 8#177777 W#2#1001_0100 WORD#32768 DW#16#0000_0000 DW#16#FFFF_FFFF Dword#8#37777777777 8#37777777777 DW#2#1111_0000_1111_0000 dword#32768 -32768 +32767 INT#16#3f_ff int#-32768 Int#2#1111_0000 inT#8#77777 -2147483648 +2147483647 DINT#16#3fff_ffff dint#-65000 Dint#2#1111_0000 dinT#8#17777777777 Decimal format 123.4567 REAL#1 real#1.5 Exponential format real#2e4 +1.234567E+02 T#0ms TIME#2h46m30s T#0.0s TIME#24.855134d -T#24d20h31m23s647ms TIME#24d20h31m23s647ms T#0.0s TIME#24.855134d D#1990-01-01 DATE#2168-12-31 TOD#00:00:00 TIME_OF_DAY#23:59:59.999 DT#95-01-01-12:12:12.2

BYTE

CHAR STRING WORD

Conversion Class B BOOL_TO_INT BOOL_TO_DINT BYTE_TO_BOOL BYTE_TO_CHAR BYTE_TO_INT BYTE_TO_DINT CHAR_TO_BYTE CHAR_TO_INT DATE_TO_DINT DINT_TO_DATE DINT_TO_DWORD DINT_TO_INT DINT_TO_TIME DINT_TO_TOD DINT_TO_BOOL DINT_TO_BYTE DINT_TO_STRING DINT_TO_WORD DWORD_TO_BOOL DWORD_TO_BYTE DWORD_TO_DINT DWORD_TO_REAL DWORD_TO_WORD DWORD_TO_INT INT_TO_CHAR INT_TO_WORD INT_TO_BOOL INT_TO_BYTE INT_TO_DWORD INT_TO_STRING REAL_TO_DINT REAL_TO_DWORD REAL_TO_INT REAL_TO_STRING STRING_TO_CHAR STRING_TO_INT STRING_TO_DINT STRING_TO_REAL TIME_TO_DINT TOD_TO_DINT WORD_TO_BOOL WORD_TO_BYTE WORD_TO_INT WORD_TO_DINT WORD_TO_BLOCK_DB BLOCK_DB_TO_WORD BCD_TO_INT(x) WORD_BCD_TO_INT(x) INT_TO_BCD(x) INT_TO_BCD_WORD(x) BCD_TO_DINT(x) DWORD_BCD_TO_DINT(x) DINT_TO_BCD(x) DINT_TO_BCD_DWORD(x)

Bit String Functions ROL Rotate left by N ROR Rotate right by N SHL Shift left by N SHR Shift right by N Processing string LEN CONCAT LEFT or RIGHT MID INSERT DELETE REPLACE FIND EQ_STRNG and NE_STRNG GE_STRNG and LE_STRNG GT_STRNG and LT_STRNG INT_TO_STRING and STRING_TO_INT DINT_TO_STRING and STRING_TO_DINT REAL_TO_STRING and STRING_TO_REAL Selecting Values SEL Select MAX Maximum MIN Minimum LIMIT Limit MUX Select from N Counters S_CU S_CD S_CUD Timers S_PULSE S_PEXT S_ODT S_ODTS S_OFFDT Conversion ROUND TRUNC

DWORD

INT

DINT

REAL

Count up Count down Count up/down

S5TIME

pulse timer extended pulse timer on-delay timer retentive on-delay timer off-delay timer

TIME

Date TIME_OF_DAY

3.56 -> 4 (even) 3.56 -> 3

DATE_AND_ TIME Declaration Section Constants Labels TemporaryvVariables Static variables Input parameters Output parameters In/out parameters

CONST…END_CONST LABEL…END_LABEL VAR_TEMP…END_VAR VAR…END_VAR VAR_INPUT…END_VAR VAR_OUTPUT…END_VAR VAR_IN_OUT…END_VAR

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Address Identifiers Mnemonic addresses (internat.) Qx,y Ouptut (via the process image) QBx Ouptut (via the process image) QDx Ouptut (via the process image) QWx Ouptut (via the process image) QXx.y Ouptut (via the process image) Dx.y Data block DBx Data block DDx Data block DWx Data block DXx.y Data block Ix.y Input (via the process image) IBx Input (via the process image) IDx Input (via the process image) IWx Input (via the process image) IXx.y Input (via the process image) Mx.y Memory bit MBx.y Bit memory MDx Bit memory MWx Bit memory MXx Bit memory PQBx Output (Direct to peripherals) PQDx Output (Direct to peripherals) PQWx Output (Direct to peripherals) PIBx Input (Direct from peripherals) PIDx Input (Direct from peripherals) PIWx Input (Direct from peripherals) x = number between 0 and 65535 (absolute address) y = number between 0 and 7 (bit number)

Data Type Bit Byte Double word Word Bit Bit Byte Double word Word Bit Bit Byte Double word Word Bit Bit Byte Double word Word Bit Byte Double word Word Byte Double word Word

Operations Assignment Operation: := Arithmetic Operations: ** + * / MOD DIV + Comparison Operations: < > <= >= = <> Logical Operations: NOT AND or & XOR OR Parentheses : ()

Symbol Assignment Power Unary plus Unary minus Multiplication Division Modulo function Integer division Addition Subtraction Less than Greater than Less than or equal to Greater than or equal to Equal to Not equal to Negation And Exclusive or Or Parentheses

Precedence 11 2 3 3 4 4 4 4 5 5 6 6 6 6 7 7 3 8 9 10 1

Control Statements IF...THEN…ELSIF…THEN…ELSE…END_IF CASE…OF…:…ELSE…END_CASE FOR…TO…BY…DO…END_FOR WHILE…DO…END_WHILE REPEAT…UNTIL…END_REPEAT CONTINUE EXIT Elementary Data Types Bit Data Types provides one or more options and selects one (or none) of its statement components for execution select one of several alternative program sections repeat a sequence of statements as long as a control variable is within the specified range of values repeat execution of a sequence of statements controlled by an execution condition repeated execution of a sequence of statements between REPEAT and UNTIL until a terminate condition occurs terminate the execution of the current iteration of a loop statement (FOR, WHILE or REPEAT). exit a loop (FOR, WHILE or REPEAT)

Character Types Numeric Types Time Types

BOOL BYTE WORD DWORD CHAR INT DINT REAL TIME DATE TIME_OF_DAY S5TIME DATE_AND_TIME DT STRING ARRAY STRUCT

Date elements of this type occupy either 1 bit, 8 bits, 16 bitsor 32 bits Data elements of this type occupy exactly 1 character in the ASCII character set Data elements of this type are available for processing numeric values.

Data elements of this type represent the various time and date values in STEP 7.

Complex Data Types Defines an area of 64 bits (8 bytes). This data type stores date and time (as a binary coded decimal) and is a predefined data type in S7-SCL. Defines an area for a character string of up to 254 characters (data type CHAR). Defines an array consisting of elements of one data type (either elementary or complex). Defines a group of data types in any combination of types. It can be an array of structures or a structure consisting of structures and arrays. declare timer functions as parameters. declare counter functions as parameters. declare FCs, FBs, DBs and SDBs as parameters. allow an address of any data type as a parameter. allow a memory area as a parameter.

Parameter Types TIMER COUNTER BLOCK_xx ANY POINTER

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