VersaLogic STD32 VL-1225, Справочное руководство

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VL-1225/6 Analog Input/Output Board
2-17
Input Data Format
The digital data format for the analog input channels can be jumpered for binary, offset binary, or two’s
complement. The configuration affects all channels.
The selection is dependent upon the input voltage range selected with jumper V3. Unipolar voltages
should use the binary data format. Bipolar voltages can use two’s complement or offset binary formats,
however, two’s complement is is the best choice since it “maps” the positive and negative voltages into
positive and negative digital values.
See the Input Data Representation section starting on page 4-4 for further information on the various
analog input data formats.
Input Range Valid Input Data Formats
0 to +10V Binary
±10V Offset Binary or Two’s Complement
±5V Offset Binary or Two’s Complement
Figure 2-17. Valid Input Data Formats
Jumper Jumper Jumper Jumper Jumper As As As As As
Block Block
Block Block Block
Description Description
Description Description Description
Shipped Shipped
Shipped Shipped Shipped
V5 Input Data Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2’s Complement
V5
1-3
= In, V5
2-4
= Out – Two’s Complement
V5
1-3
= Out, V5
2-4
= In – Binary / Offset Binary
Figure 2-18. Input Data Format Options
Configuration – Analog Input Configuration