Allen-Bradley MicroLogix 1100

Publication 1763-RM001C-EN-P - October 2009
194 Math Instructions
MUL - Multiply
DIV - Divide
Instruction Type: output
Use the MUL instruction to multiply one value by another value (Source A
x Source B) and place the result in the Destination.
Use the DIV instruction to divide one value by another value (Source A/
Source B) and place the result in the Destination. If the Sources are single
words and the Destination is directly addressed to S:13 (math register),
then the quotient is stored in S:14 and the remainder is stored in S:13. If
long words are used, then the results are rounded.
NEG - Negate
Instruction Type: output
Use the NEG instruction to change the sign of the Source and place the
result in the Destination.
CLR - Clear
Instruction Type: output
Use the CLR instruction to set the Destination to a value of zero.
MUL
Multiply
Source A N7:0
0<
Source B N7:1
0<
Dest N7:2
0<
MUL
DIV
Divide
Source A N7:0
0<
Source B N7:1
0<
Dest N7:2
0<
DIV
Execution Time for the MUL and DIV Instructions
Controller Instruction Data Size When Rung Is:
True False
MicroLogix 1100 MUL word 20.59 μs 0.87 μs
long word 20.68 μs 0.87 μs
DIV word 14.68 μs 0.87 μs
long word 14.96 μs 0.87 μs
NEG
Negate
Source N7:0
0<
Dest N7:1
0<
NEG
Execution Time for the NEG Instruction
Controller Data Size When Rung Is:
True False
MicroLogix 1100 word 8.78 μs 0.87 μs
long word 9.62 μs 0.87 μs
CLR
Clear
Dest N7:0
0<
CLR
Execution Time for the CLR Instruction
Controller Data Size When Rung Is:
True False
MicroLogix 1100 word 5.29μs 0.87 μs
long word 5.46 μs 0.87 μs
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