4 object and data types supported, 5 standardized value – GE Industrial Solutions AF-600 FP Profibus DP User Manual
Page 66
6.4.4 Object and Data Types Supported
Data types supported
Data type
Short name
Description
3
I2
Integer 16
4
I4
Integer 32
5
-
Unsigned 8
6
O2
Unsigned 16
7
O4
Unsigned 32
9
-
Visible string
10
-
Byte string
33
N2
Standardized value (16 bit)
35
V2
Bit sequence
54
-
Time difference without date indication
6.4.5 Standardized Value
The frequency reference value is transmitted to the frequency converter in the form of a 16-bit word. The value is transmitted in integers (0-32767). The value
16384 (4000 Hex) corresponds to 100%. Negative numbers are formed with the aid of the twos complement.
0% = 0 (0h), 100% is 2
14
(4000h)
Data type
N2
Range
-200%...+200%
Resolution
2
-14
= 0.0061%
Length
2 bytes
Notation: 2s complement notation.
MSB is 1st bit after sign bit in 1st byte.
Sign bit = 0 = positive number
Sign bit = 1 = negative number
Bit
8
7
6
5
4
3
2
1
Byte 1
SIGN
2
14
2
13
2
12
2
11
2
10
2
9
2
Byte 2
2
7
2
6
2
5
24
2
3
2
2
2
1
2
0
Bit sequence
16 boolean values for control and presentation of user functions.
Notation is binary
Bit
8
7
6
5
4
3
2
1
Byte 1
15
14
13
12
11
10
9
8
Byte 2
7
6
5
4
3
2
1
0
AF-650 GP/AF-600 FP Profibus DP Operating Instructions
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