Siemens Simatic S7 Series

Program instructions
7.8 Math
S7-200 SMART
262 System Manual, 09/2015, A5E03822230-AC
7.8.2
Multiply integer to double integer and divide integer with remainder
LAD / FBD
STL
Description
MUL IN1, OUT
The multiply integer to double Integer instruction multiplies two 16-bit integers and
produces a 32-bit product.
In STL, the least-significant word (16 bits) of the 32-bit OUT is used as one of the
factors.
• LAD and FBD: IN1 * IN2 = OUT
• STL: IN1 * OUT = OUT
DIV IN1, OUT
The divide integer with remainder instruction divides two 16-bit integers and pro-
duces a 32-bit result consisting of a 16-bit remainder (the most-significant word) and
a 16-bit quotient (the least-significant word).
In STL, the least-significant word (16 bits) of the 32-bit OUT is used as the dividend.
• LAD and FBD: IN1 / IN2 = OUT
• STL: OUT / IN1 = OUT
Non-fatal errors with ENO=0
SM bits affected
1
• 0006H Indirect address
• SM1.1 Overflow
• SM1.3 Divide by zero
• SM1.0 Result of operation = zero
• SM1.1 Overflow, illegal value generated during the operation, or illegal input
• SM1.2 Negative result
• SM1.3 Divide by zero
1
For both of these instructions, SM bits indicate errors and illegal values. If SM1.3 (divide by zero) is set during a divide
operation, then the other math status bits are left unchanged. Otherwise, all supported math status bits contain valid
status upon completion of the math operation.
Input / output
Data type
Operand
IN1, IN2
INT
IW, QW, VW, MW, SMW, SW, T, C, LW, AC, AIW, *VD, *LD, *AC, Constant
OUT
DINT
ID, QD, VD, MD, SMD, SD, LD, AC, *VD, *LD, *AC