VIPA 021-1BB00, Руководство пользователя

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Manual VIPA System SLIO
Chapter 5 Analog Output
HB300E - SM - Rev. 09/38 5-3
Analog value
The analog values are only processed in binary representation. Hereby the
binary word variable is transformed into an analog process signal and put
out via the corresponding channel.
Resolution Analog value
High-byte (byte 0) Low-byte (byte 1)
Bit number 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Resolution SG 2
14
2
13
2
12
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
12bit + SG SG Analog value (word) X X X
With a resolution of 12bit plus sign bit, the least significant bits (3bit) are not
relevant.
The algebraic sign bit is represented by Bit 15. Here it is essential:
Bit 15 = "0"
→
positive value
Bit 15 = "1"
→
negative value
Analog value
representation
Resolution
Sign bit (SG)