Eaton DS7 - Page 207

8 SmartWire-DT
8.9 Programming
DS7 Soft starter 09/16 MN03901001Z-EN www.eaton.com 203
Bit sequence: V2
In this bit string, 16 variables of type BOOLEAN are represented in two
octets.
Code: 115
dec
= 73
hex
Time constant: D2
Values of time data type D2 always refer to a specific, constant scan time T
a
.
This time Ta is the shortest scan time (defined in PNU 962) and is required
here in order to evaluate D2.
The value for D2 can be calculated as follows:
D2 = i x T
a
/16384
Time constant: T2
Values of time data type T2 are always relative to a specific constant scan
time T
a
. T
a
is the shortest scan time (defined in PNU 962). It is required here
to calculate T2.
The following formula applies: T2 = i x T
a
Octet Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit3 Bit 2 Bit1
1 SN 2
-0
2
-1
2
-2
2
-3
2
-4
2
-5
2
-6
2 2
-7
2
-8
2
-9
2
-10
2
-11
2
-12
2
-13
2
-14
3 2
-15
2
-16
2
-17
2
-18
2
-19
2
-20
2
-21
2
-22
4 2
-23
2
-24
2
-25
2
-26
2
-27
2
-28
2
-29
2
-30
Octet Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit3 Bit 2 Bit1
1 15 14 13 12 11 10 9 8
2
7 6 5 4 3 2 1 0
Data type Code
(dec)
Code
(hex)
Byte Value range Resolution
D2 Time constant 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
T2 Time constant
(16 Bit)
118 76 1 0 ≦ i ≦ 32767 x T
a
T
a
T2 Time constant
(32 Bit)
119 77 2 0 ≦ i ≦ 4294967295 x T
a
T
a
￫
For more detailed information on the data types, refer to the
following as well: IEC 61158-5: 2003