5.4.3 Object and 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
Standardised value (16 bit)
35
V2
Bit sequence
54
-
Time difference without date
indication
Table 5.22 Data Types Supported
5.4.4 Standardised Value
The frequency reference value transmits to the frequency
converter in the form of a 16-bit word. The value transmits
in integers (0-32767). The value 16384 (4000 hex)
corresponds to 100%. Negative numbers are formed with
the aid of the 2s complement.
0%=0 (0h), 100%=2
14
(4000 h)
Data type
N2
Range
-200%...+200%
Resolution
2
-14
=0.0061%
Length
2 bytes
Table 5.23 N2 Data Type
MSB is the first bit after the sign bit in the first byte.
Sign bit=0=positive number
Sign bit=1=negative number
Bit
Byte 1
Byte 2
8
SIGN
2
7
7
2
14
2
6
6
2
13
2
5
5
2
12
24
4
2
11
2
3
3
2
10
2
2
2
2
9
2
1
1
2
2
0
Table 5.24 Notation is 2s Complement
Bit sequence
16 boolean values for control and presentation of user
functions.
Bit
Byte 1
Byte 2
8
15
7
7
14
6
6
13
5
5
12
4
4
11
3
3
10
2
2
9
1
1
8
0
Table 5.25 Notation is Binary
Parameter Access
Programming Guide
32
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MG37G102
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