Siemens CPU 412-1 User Manual

Floating-Point Math (32 Bits)
65
S7-400 Instruction List
A5E00267845-01
Floating-Point Math (32 Bits)
The result of the math instruction is in ACCU1. ACCU3 and ACCU4 are then transferred to ACCU2 and ACCU3.
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
+R Add 2 real numbers (32 bits)
(ACCU1)=(ACCU2)+(ACCU1)
1 0.4 0.24 0.16 0.12
–R Subtract 1 real number from another (32 bits)
(ACCU1)=(ACCU2)-(ACCU1)
1 0.4 0.24 0.16 0.12
*
R Multiply 1 real number by another (32 bits)
(ACCU1)=(ACCU2)
*
(ACCU1)
1 0.2 0.12 0.08 0.06
/R Divide 1 real number by another (32 bits)
(ACCU1)=(ACCU2):(ACCU1)
1 0.7 0.42 0.28 0.21
Status word for: +R, –R,
*
R, /R BR CC1 CC0 OV OS OR STA RLO /FC
Instruction evaluates: – – – – – – – – –
Instruction affects: – Yes Yes Yes Yes – – – –

Siemens CPU 412-1 Specifications

General

Brand	Siemens
Model	CPU 412-1
Category	Computer Hardware
Language	English