Page 703 - Mechanical Engineers' Handbook (Volume 2)

694 General-Purpose Control Devices

(b) Figure 11 (Continued)

Table 8 IEC Standard Functions for Programmable Controllers
Standard Name Function Standard Name Function
Numeric Functions
ABS Absolute value ACOS Arc cosine
SQRT Square root ATAN Arc tangent
LN Natural logarithm ADD or Addition
LOG Logarithm base 10 SUB or Subtraction
EXP Natural exponential MUL or * Multiplication
SIN Sine DIV or / Division
COS Cosine MOD Modulo
TAN Tangent EXPT or ** Exponentiation
ASIN Arc sine MOVE or : Assignment
Bit String Functions
SHL Shift left, zero filled SHR Shift right, zero filled
ROL Rotate left circular ROR Rotate right circular
AND or & Bitwise Boolean OR or 1 Bitwise Boolean
AND OR
XOR or 2k 1 Bitwise Boolean exclusive NOT Bitwise Boolean complement
OR
Selection and Comparison Functions
SEL Binary (1 of 2) selection MUX Multiplexer (1 of N) selection
MIN Minimum of N inputs MAX Maximum of N inputs
LIM Hard upper/lower limiter GT or Greater than
GE or Greater than or equal to EQ or Equal to
LE or Less than or equal to LT or Less than
NE or Not equal
Character String Functions
CONCAT Concatenate N strings INSERT Insert one string into another
DELETE Delete a portion of a string REPLACE Replace a portion of one string
with another
NE or Not equal

Source: From Ref. 3.