Siemens CPU 414-2 - Logarithmic Function (32 Bits)

Logarithmic Function (32 Bits)
68
S7-400 Instruction List
A5E00267845-01
Logarithmic Function (32 Bits)
The result of the logarithmic function is in ACCU1. The instructions can be interrupted.
Instruc-
Address
Description
Length
in
Execution Time in s
Instruc-
tion
Address
ID
Description
Length
in
Words
CPU 412 CPU 414 CPU 416 CPU 417
LN Form the natural logarithm of a
real number in ACCU1
1 20 13 9 7
EXP Calculate the exponential value
of a real number in ACCU1 to the
base e (= 2.71828)
1 21 15 10 8
Status word for: LN, EXP BR CC1 CC0 OV OS OR STA RLO /FC
Instruction evaluates: – – – – – – – – –
Instruction affects: – Yes Yes Yes Yes – – – –