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FC6A S
ERIES
MICROS
MART
L
ADDER
P
ROGRAMMING
M
ANUAL
FC9Y-B1726
12-5
12: D
ISPLAY
I
NSTRUCTIONS
Floating Point Value Notation on LCD
Whether or not F (float) LCD notation uses decimal notation or exponent notation is determined according to the single-
precision floating point definition in IEEE 754 and the internal system function included in the CPU module.
The IEEE 754 single precision format consists of three fields: a 23-bit fraction, f; an 8-bit biased exponent, e; and 1-bit sign,
s. These fields are stored contiguously in one 32-bit word, as shown in the figure below. Bits 0:22 contain the 23-bit fraction,
f, with bit 0 being the least significant bit of the fraction and bit 22 being the most significant; bits 23:30 contain the 8-bit
biased exponent, e, with bit 23 being the least significant bit of the biased exponent and bit 30 being the most significant;
and the highest-order bit 31 contains the sign bit, s.
The table below shows the correspondence between the values of the three constituent fields s, e, and f and the value
represented by the single precision format bit pattern.
When the value is ±0, denormalized number, or normalized number, the value is displayed according to the internal system
function of the CPU module.
Example: This table shows the representation on the LCD for the following floating-point values.
Value
Exponent Field e
Fraction Field f
Representation
±0
e=0
f=0
0
Denormal numbers
e=0
f
≈
0
• Displayed in decimal notation
0.0001
≤
| Value | < 9,999,999.5
(Number of significant digits is 7 digits, 8th
digit is rounded)
• Displayed in exponent notation
| Value | < 0.0001
| Value |
≥
9,999,999.5
Normal numbers
0<e<255
Arbitrary
±
∞
(± infinities)
e=255
f=0
INF
NaNs (Not a number)
f
≈
0
NAN
Value
Representation in LCD
1234567
1234567
12345678
1.07
1234567.8
1234568
0.0001
0.0001
0.00001
1E-05
0.000001
1E-06
0.0000001
1E-07
0.123456
0.123456
0.1234567
0.1234567
0.12345678
0.1234568
0.0000012
1.2E-06
1.2345678
1.234568
0
0
0.0001234568
0.0001234568
s
e[30:23]
f[22:0]
31 30
23 22
0
23-bit fraction
8-bit biased exponent
Sign bit (0: positive, 1: negative)
Bit Bit
Bit Bit
Bit
Содержание MICROSmart FC6A Series
Страница 1: ...B 1726 7 FC6A SERIES Ladder Programming Manual ...
Страница 8: ...Preface 7 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 32: ...1 OPERATION BASICS 1 20 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 96: ...3 INSTRUCTIONS REFERENCE 3 18 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 130: ...4 BASIC INSTRUCTIONS 4 34 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 158: ...6 DATA COMPARISON INSTRUCTIONS 6 10 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 192: ...9 SHIFT ROTATE INSTRUCTIONS 9 12 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 216: ...10 DATA CONVERSION INSTRUCTIONS 10 24 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 248: ...11 WEEK PROGRAMMER INSTRUCTIONS 11 32 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 272: ...12 DISPLAY INSTRUCTIONS 12 24 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 284: ...14 REFRESH INSTRUCTIONS 14 6 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 288: ...15 INTERRUPT CONTROL INSTRUCTIONS 15 4 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 294: ...16 COORDINATE CONVERSION INSTRUCTIONS 16 6 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 374: ...18 PULSE OUTPUT INSTRUCTIONS 18 78 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 Setting ...
Страница 450: ...20 DUAL TEACHING TIMER INSTRUCTIONS 20 4 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 502: ...25 DATA LOG INSTRUCTIONS 25 22 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 546: ...26 SCRIPT 26 44 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 574: ...27 FLOW CALCULATION INSTRUCTIONS 27 28 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 583: ...FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 28 9 28 USER DEFINED MACRO INSTRUCTION ...
Страница 584: ...28 USER DEFINED MACRO INSTRUCTION 28 10 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...
Страница 598: ...APPENDIX A 14 FC6A SERIES MICROSMART LADDER PROGRAMMING MANUAL FC9Y B1726 ...