Eaton DX-NET-PROFINET2-2, Manual

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4 Commissioning
4.12 Acyclic data
62
DX-NET-PROFINET2-2 01/22 MN040062EN www.eaton.com
Time constant D2
The values of the time data type D2 always refer to a specific, constant sam-
pling time T
a
. This time T
a
is the smallest sampling time (defined in PNU 962)
and is required here to evaluate D2.
The value for D2 can be calculated as follows: D2 = i x T
a
/16384
Table 40: Time constant D2
Time constant T2
The values of the time data type T2 always refer to a specific, constant
sampling time T
a
. T
a
is the smallest sampling time (defined in PNU 962).
It is required here to calculate T2. The following applies: T2 = i x T
a
Table 41: Time constant T2
Standard data types
Table 42: Standard data types
Data type Code
[dec] Code
[hex] Byte Value range Resolution
Time constant D2 120 78 1 0 ≦ i ≦ (2 - 2
-14
) x T
a
2
-14
x T
a
Data type Code
[dec] Code
[hex] Byte Value range Resolution
Time constant T2 (16 bits) 118 76 1 0 ≦ i ≦ 32767 x T
a
T
a
Time constant T2 (32 bits) 119 77 2 0 ≦ i ≦ 4294967295 x T
a
T
a
Data type Coding
Integer8 2
Integer16 3
Integer32 4
Insigned16 6
Unsigned32 7
OctetString 10
￫
For more information on data types, refer to the document
IEC 61158-5: 2003.