Rockwell Automation 1785-Lxxx Enhanced and Ethernet PLC-5 Programmable Controllers - Manual (Page 310)

Publication 1785-UM012D-EN-P - July 2005
D-10 Instruction Set Quick Reference
Natural log
LN
Multiply
MUL
Instruction Description
LN
NATURAL LOG
Source
Dest
N7:0
F8:20
5
1.609438
When input conditions go true, take the natural log of the va
in N7:0 and store the result in F8:20.
always resets
sets if overflow is generated;
sets if the result is zero;
Status
C
V
Z
S
Description
Bit
otherwise resets
otherwise resets
sets if the result is negative;
otherwise resets
LOG
LOG BASE 10
Source
Dest
N7:2
F8:3
5
0.6989700
When input conditions go true, take the log base 10 of the
value in N7:2 and store the result in F8:3.
always resets
sets if overflow is generated;
sets if the result is zero;
Status
C
V
Z
S
Description
Bit
otherwise resets
otherwise resets
sets if the result is negative;
otherwise resets
MUL
MULTIPLY
Source A
Source B
Dest
N7:3
N7:4
N7:12
3
1
3
sets if the result is zero;
sets if overflow is generated;
When the input conditions are true, multiply the value in
Source A (N7:3) by the value in Source B (N7:4) store the
result in the Destination (N7:12).
Status
C
V
Z
S
Description
always resets
Bit
sets if the result is negative;
otherwise resets
otherwise resets
otherwise resets