Elementary blocks

ACOS

Arc cosine

Calculates the arc cosine

ADD_DI

Adder (double-integer)

Adds in double-integer format

ADD_I

Adder (integer)

Adds in integer format

ADD_R

Adder (real)

Adds in real format

ASIN

Arc sine

Calculates the arc sine

ATAN

Arc tangent

Calculates the arc tangent

CADD_DI

Conditional adder (double-integer)

Adds in accordance with conditions in double-integer format

CADD_I

Conditional adder (integer)

Adds in accordance with conditions in integer format

CADD_R

Conditional adder (real)

Adds in accordance with conditions in real format

CMP_R

Comparator

Compares 2 input variables

COS

Cosine

Calculates the cosine

DIV_R

Divider

Calculates the quotient of 2 input variables

EPS_R

Absolute comparator

Compares the absolute values of the inputs

EXP

Exponential function

Calculates the exponential function

LIM_R

Limiting function

Compares a value to the lower and upper limit

LN

Natural logarithm

Calculates the natural logarithm

LOG10

Logarithm to base 10

Calculates the logarithm to base 10

MAX2_R

Maximum of 2 real values

Compares 2 real values and outputs their maximum

MAX4_DI

Maximum of 4 double-integer values

Compares 4 double-integer values and outputs their maximum

MAX4_I

Maximum of 4 integer values

Compares 4 integer values and outputs their maximum

MAX4_R

Maximum of 4 real values

Compares 4 real values and outputs their maximum

MAX8_DI

Maximum of 8 double-integer values

Compares 8 double-integer values and outputs their maximum

MAX8_I

Maximum of 8 integer values

Compares 8 integer values and outputs their maximum

MAX8_R

Maximum of 8 real values

Compares 8 real values and outputs their maximum

MIN2_R

Minimum of 2 real values

Compares 2 real values and outputs their minimum

MIN2_DI

Minimum of 2 double-integer values

Compares 2 double-integer values and outputs their minimum

MIN4_I

Minimum of 4 integer values

Compares 4 integer values and outputs their minimum

MIN4_R

Minimum of 4 real values

Compares 4 real values and outputs their minimum

MIN8_DI

Minimum of 8 double-integer values

Compares 8 double-integer values and outputs their minimum

MIN8_I

Minimum of 8 integer values

Compares 8 integer values and outputs their minimum

MIN8_R

Minimum of 8 real values

Compares 8 real values and outputs their minimum

MUL_DI

Multiplier (double-integer)

Multiplies in double-integer format

MUL_I

Multiplier (integer)

Multiplies in integer format

MUL_R

Multiplier (real)

Multiplies in real format

MUX2_R

Multiplexer 1-out-of-2 (real)

Multiplexer 1-out-of-2 for real values

MUX4_R

Multiplexer 1-out-of-4 (real)

Multiplexer 1-out-of-4 for real values

MUX8_R

Multiplexer 1-out-of-8 (real)

Multiplexer 1-out-of-8 for real values

POW10

Exponentiation 10^Value

Calculation of 10 raised to the power of a value

POWXY

Exponentiation Value1^Value2

Calculation of Value1 raised to the power of Value2

R_DI

Converter real to double integer

Converts from real format to double-integer format

R_DW

Converter real to double-word

Converts from real format to double-word format

R_I

Converter real to integer

Converts from real format to integer format

SIN

Sine

Calculates the sine

SQRT

Square root

Calculates the square root

SUB_DI

Subtractor (double-integer)

Subtracts Value 2 from Value 1 in double-integer format

SUB_I

Subtractor (integer)

Subtracts Value 2 from Value 1 in integer format

SUB_R

Subtractor (real)

Subtracts Value 2 from Value 1 in real format

TAN

Tangent

Calculates the tangent

TIME_BEG

System time for block call

Specifies the system time at which the block was called

TIME_END

Time differential to current system time

Specifies the difference between the input TM and the current system time

TIMER_P

Timers

Pulse generator, extended pulse timer, ON delay, latching ON delay or OFF delay

Additional blocks for use in S7-300

AFP

Clock generator

Creates pulses with pulse duration and interval to be parameterized

CONT_C

Continuous-action controller

PID controller with output of analog manipulated variable

CONT_S

Step controller

PID controller with binary manipulated variable output for actuating motor-driven final control elements

CTD

Down counter

Forms an edge-triggered down counter

CTU

Up counter

Forms an edge-triggered up counter

CTUD

Up/down counter

Forms an edge-triggered up/down counter

F_TRIG

Tests falling edge

Checks for the occurrence of a falling edge

PULSEGEN

Pulse generator

In combination with the continuous-action controller, converts the analog manipulated variable into a pulse-width modulated manipulated variable

R_TRIG

Tests rising edge

Checks for the occurrence of a rising edge

RESTART

Cold restart

Restarting of S7-300 CPU

SAMP_AVE

Mean value generator

Outputs the mean value of the last N values

TIME

Time between two calls

Measures the time between two calls

Additional blocks for use in S7-400

AFP

Clock generator

Creates pulses with pulse duration and interval to be parameterized

CONT_C

Continuous-action controller

PID controller with output of analog manipulated variable

CONT_S

Step controller

PID controller with binary manipulated variable output for actuating motor-driven final control elements

CTD

Down counter

Forms an edge-triggered down counter

CTU

Up counter

Forms an edge-triggered up counter

CTUD

Up/down counter

Forms an edge-triggered up/down counter

F_TRIG

Tests falling edge

Checks for the occurrence of a falling edge

PULSEGEN

Pulse generator

In combination with the continuous-action controller, converts the analog manipulated variable into a pulse-width modulated manipulated variable

R_TRIG

Tests rising edge

Checks for the occurrence of a rising edge

SAMP_AVE

Mean value generator

Outputs the mean value of the last N values

TIME

Time between two calls

Measures the time between two calls