1 WindO/I-NV4 Specifications
2-2
WindO/I-NV4 User’s Manual
BCD8(EB)
Data is handled as an eight digit (32-bit) binary-coded decimal
value.
Each four bits from bit 0 to bit 27 is handled as the absolute value
for the 1st to 7th digit.
Bit 28 to bit 31 is handled as the minus sign (-) when its value is F
(Hex) and it is handled as the absolute value for the 8th digit when
0 to 9 (Hex).
Float32(F)
Data is handled as a 32-bit floating-point real number. The number of significant digits is 6 digits. The
floating-point type data format conforms to the IEEE (The Institute of Electrical and Electronics Engineers)
standard for the single precision storage format as explained next.
Single precision floating-point values in IEEE 754 (32 bits)
Single precision floating-point values in IEEE 754 are expressed with a total of 32 bits (2 words) using 1 bit for
the sign s, 8 bits for the exponent e, and 23 bits for the significand f. The sign bit indicates the sign of the
expressed value (positive or negative). The exponent is an 8 bit signed integer with a value from -128 to 127.
Example:
If all bits are 0, the value is “0”.
Data type
Data handling
bit
0
bit
31
Absolute value
Lower word
Upper word
Sign
1st
2nd
3rd
4th
5th
6th
7th
s
e (exponent) [bit 30 to 23]
bit
31
bit
23
f (significand) [bit 22 to 0]
Represents after the decimal of 1.xxx
+127
Sign bit (0: positive, 1: negative)
bit
22
bit
0
bit
30
s
e
f
0 0 1 1 1 1 1 0 1
1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 . 1 × 2
- 2
The internal representation of Float32(F) is described here, but the data for Float32(F) (floating-point real
numbers) is handled with a special bit configuration, so do not directly access the bits.
Data type
Data handling
String(S)
The entered text are stored in the upper byte and the lower byte according to the
Storage Method of
String Data
setting of WindO/I-NV4.
Select the
from Upper byte
in the
Storage Method of String Data
Select the
from Lower byte
in the
Storage Method of String Data
For details, refer to Chapter 10 “2.6 String Data Storage Method” on page 10-55.
The
Storage Method of String Data
is configured on the
System
tab in the
Project Settings
dialog
box.
1st
character
Upper byte
2nd
character
Lower byte
3rd
character
Upper byte
n-2-th
character
Upper byte
n-1-th
character
Lower byte
n-th
character
Upper byte
NULL
(00
ｈ
)
Lower byte
1 word
String Data
1st
character
Upper byte
2nd
character
Lower byte
4th
character
Upper byte
n-2-th
character
Upper byte
n-1-th
character
Lower byte
n-th
character
Upper byte
NULL
(00
ｈ
)
Lower byte
1 word
String Data
Summary of Contents for WindO/I-NV4
Page 1: ...B 1701 16 User s Manual...
Page 108: ...5 WindO I NV4 Common Operations and Settings 2 76 WindO I NV4 User s Manual...
Page 256: ...7 BACnet Communication 3 148 WindO I NV4 User s Manual...
Page 372: ...6 Screen Restrictions 5 32 WindO I NV4 User s Manual...
Page 390: ...5 Part Library Function 6 18 WindO I NV4 User s Manual...
Page 420: ...3 Text 7 30 WindO I NV4 User s Manual...
Page 628: ...2 Multi State Lamp 9 34 WindO I NV4 User s Manual...
Page 924: ...4 Meter 11 76 WindO I NV4 User s Manual...
Page 990: ...7 Timer 12 66 WindO I NV4 User s Manual...
Page 1030: ...4 Using Data and Detected Alarms 13 40 WindO I NV4 User s Manual...
Page 1098: ...4 Using the Data 15 22 WindO I NV4 User s Manual...
Page 1248: ...5 Restrictions 22 18 WindO I NV4 User s Manual...
Page 1370: ...2 Monitoring on the MICRO I 25 28 WindO I NV4 User s Manual...
Page 1388: ...4 Restrictions 26 18 WindO I NV4 User s Manual...
Page 1546: ...5 Module Configuration Dialog Box 30 36 WindO I NV4 User s Manual...
Page 1614: ...3 Settings 34 14 WindO I NV4 User s Manual...
Page 1726: ...5 Text Alignment A 10 WindO I NV4 User s Manual...
