Multiply Integer To Double Integer And Divide Integer With Remainder - Siemens Simatic S7-200 System Manual

S7-200 Programmable Controller System Manual

Multiply Integer to Double Integer and Divide Integer with Remainder

Multiply Integer to Double Integer
IN1 * IN2 = OUT
IN1 * OUT = OUT
The Multiply Integer to Double Integer instruction (MUL) multiplies
two 16-bit integers and produces a 32-bit product. In the STL MUL
instruction, the least-significant word (16 bits) of the 32-bit OUT is
used as one of the factors.
Divide Integer with Remainder
IN1 / IN2 = OUT
OUT / IN1 = OUT
The Divide Integer with Remainder instruction (DIV) divides two
16-bit integers and produces a 32-bit result consisting of a 16-bit
6
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.
SM Bits and ENO
For both of the instructions on this page, Special Memory (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.
Error conditions that set ENO = 0
H SM1.1 (overflow)
H SM1.3 (divide by zero)
H 0006 (indirect address)
Table 6-38
Inputs/Outputs
IN1, IN2
OUT
Example: Multiply Integer to Double Integer Instruction and Divide Integer with Remainder Instruction
Note: VD100 contains: VW100 and VW102, and VD200 contains: VW200 and VW202.
142
LAD and FBD
STL
LAD and FBD
STL
Valid Operands for Multiply Integer to Double Integer and Divide Integer with Remainder
Data Types Operands
INT IW, QW, VW, MW, SMW, SW, T, C, LW, AC, AIW, *VD, *LD, *AC, Constant
DINT ID, QD, VD, MD, SMD, SD, LD, AC, *VD, *LD, *AC
Special Memory bits affected
H SM1.0 (zero)
H SM1.1 (overflow)
H SM1.2 (negative)
H SM1.3 (divide by zero)
Network 1
LD I0.0
MUL AC1, VD100
DIV VW10, VD200
Multiply Integer to
400
Double Integer
AC1
Divide Integer
4000
with Remainder
VW202
* 200 = 80000
VW102 VD100
rem. quot.
41 23 97
/ =
VW200 VW202
VW10
VD200