Siemens SIMATIC S7 System Manual page 836

References
E.4 STL instructions
Math, increment, and decrement instructions
STL
+I IN1, OUT
+D IN1, OUT
+R IN1, OUT
-I IN1, OUT
-D IN1, OUT
-R IN1, OUT
MUL IN1, OUT
*I IN1, OUT
*D IN1, OUT
*R IN1, IN2
DIV IN1, OUT
/I IN1, OUT
/D,IN1, OUT
/R IN1, OUT
SQRT IN, OUT
LN IN, OUT
EXP IN, OUT
SIN IN, OUT
COS IN, OUT
TAN IN, OUT
INCB OUT
INCW OUT
INCD OUT
DECB OUT
DECW OUT
DECD OUT
PID TBL, LOOP
Timer and counter instructions
STL
TON Txxx, PT
TOF Txxx, PT
TONR Txxx, PT
BITIM OUT
CITIM IN, OUT
CTU Cxxx, PV
CTD Cxxx, PV
CTUD Cxxx, PV
836
Description
Add Integer, Double Integer or Real
IN1+OUT=OUT
Subtract Integer, Double Integer, or Real
OUT-IN1=OUT
Multiply Integer (16*16->32)
Multiply Integer, Double Integer, or Real
IN1 * OUT = OUT
Divide Integer (16/16->32)
Divide Integer, Double Integer, or Real
OUT / IN1 = OUT
Square Root
Natural Logarithm
Natural Exponential
Sine
Cosine
Tangent
Increment Byte, Word or DWord
Decrement Byte, Word, or DWord
PID Loop
Description
On-Delay Timer
Off-Delay Timer
Retentive On-Delay Timer
Beginning Interval Timer
Calculate Interval Timer
Count Up
Count Down
Count Up/Down
System Manual, V2.3, 07/2017, A5E03822230-AF
S7-200 SMART