X8 Instruction Set Reference Manual
10-4
Math Instructions
Floating Point
The
X8 Series PLC
supports Floating Point typed (F) 32 bit size data table,
and Floating Point observes IEEE-754 specifications.
Like other data tables, it supports 1, 536 of elements.
Floating Point Type Data Structure
• Bit 31 is MSB and means the sign bit.
•
Bits 30 ~ 23 are the exponent
.
•
Bits 22 ~ 00 are the mantissa
.
LSB Round to Even Rule
• Floating point operations are rounded. If the bits to the right of the LSB
represent a value of exactly one-half LSB, the result is rounded up or down so
that the LSB is an even number.
Floating Point Exception Values
Input 1
Input 2
Output
Inte
G
er
Integer
Integer
Integer
Long
Long
Integer
Float
Float
Long
Integer
Long
Long
Long
Long
Long
Float
Float
Float
Integer
Float
Float
Long
Float
Float
Float
Float
MSB
LSB
31
30
29
...
23
22
21
20
19
...
2
1
0
Sign
Exponent Value
Mantissa
Parameter
Data Table
SFR
Address
Mode
Address
Level
Y
X
SR
B
TM, CT
, CR
N
F
ST
A
L
MG,
PD
RP
PS
RTC
HSC
PTO
, PWM
STI
EII
BHI
MM
I
CS
-Comms
DLS-DataLog
Imm
edi
ate
Direct
Indirect
Bi
t
Wo
rd
LongW
ord
Element
Input 1
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Input 2
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Output
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Содержание X8 Series
Страница 1: ...Catalog Number s X8 M14DDT X8 M16DDR X8 M32DDT X8 Instruction Manual Reference Manual ...
Страница 16: ......
Страница 64: ...X8 Instruction Set Reference Manual 2 12 X8 Series PLC Memory and Data Table ...
Страница 134: ...X8 Instruction Set Reference Manual 5 38 Using the High Speed Counter and Programmable Limit Switch ...
Страница 166: ...X8 Instruction Set Reference Manual 7 8 Relay Type Bit Instructions ...
Страница 180: ...X8 Instruction Set Reference Manual 8 14 Timer and Counter Instructions ...
Страница 205: ...X8 Instruction Set Reference Manual Math Instructions 10 17 ...
Страница 206: ...X8 Instruction Set Reference Manual 10 18 Math Instructions ...
Страница 212: ...X8 Instruction Set Reference Manual 11 6 Converion Instructions ...
Страница 218: ...X8 Instruction Set Reference Manual 12 6 Logical Instructions ...
Страница 236: ...X8 Instruction Set Reference Manual 15 8 Shift and FIFO LIFO Instructions ...
Страница 242: ...X8 Instruction Set Reference Manual 16 6 Sequencing Instructions ...
Страница 252: ...X8 Instruction Set Reference Manual 18 4 Input and Output Instructions ...
Страница 280: ...X8 Instruction Set Reference Manual 20 12 PID Control ...
Страница 296: ...X8 Instruction Set Reference Manual 21 16 ASCII Instructions ...
Страница 308: ...X8 Instruction Set Reference Manual 22 12 Communications Instructions ...
Страница 312: ...Appendix A 4 System Error Code ...
Страница 313: ...Appendix B MSG Instruction Error Code MSG Instruction Error Code ...
Страница 322: ...Appendix B 10 MSG Instruction Error Code ...
Страница 325: ...ASCII Character Set Appendix C 3 ...
Страница 326: ...Publication number X8 RM001A EN September 2012 ...
Страница 327: ...Copyright 2012 RS Automation Co Ltd All rights reserved ...