Lenze DDS v2.3 - Manual (Page 293)

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IEC 61131-3 Standard functions
14-1
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DDS EN 2.3
14 IEC 61131-3 standard functions
Type conversion functions
Conversions between integer number types.
BOOL_TO
BOOL è type X
TO_BOOL Type X è BOOL
TIME_TO / TIME_OF_DAY TIME / TIME_OF_DAY è type X
DATE_TO / DT_TO DATE / DATE_AND_TIME è type X
STRING_TO STRING è type X
TRUNC REAL è INT
Numerical functions
ABS
Absolute value
SQRT Square root
LN Natural logarithm
LOG Logarithm to the base of 10
EXP Exponential function
SIN Sine calculation in radians
COS Cosine calculation in radians
TAN Tangent calculation in radians
ASIN Arc sine calculation in radians
ACOS Arc cosine calculation in radians
ATAN Arc tangent calculation in radians
EXPT Exponentiation of one variable to another
STRING functions
LEN
Returns the length of a string
LEFT Returns a left start string of a string
RIGHT Returns a right start string of a string
MID Returns a segment of a string
CONCAT Concatenates two strings
INSERT Inserts a string into another string from a specific position
DELETE Deletes a segment from a string from a specific position
REPLACE Replaces a segment within a string with another string
FIND Looks for a segment within a string
Bistable function blocks
SR
Bistable function block (dominant set)
RS Bistable function block (dominant reset)
SEMA Software semaphore (interruptible)
Edge detection
R_TRIG
Rising edge detector
F_TRIG Falling edge detector
Counters
CTU
Up counter
CTD Down counter
CTUD Up and down counter
Timers
TP
Pulse encoder
TON Timer on-delay
TOF Timer off-delay
RTC* Runtime clock*
* Not supported
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