Register Format •• 17
Refer to section 4.x and 4.x for the relative function library.
Data Format of Relay Output and Readback Status Registers:
Bit 7 6 5 4 3 2 1 0
Relay Output
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
Output
Readback
RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
3.4 Isolation Input Registers
There are 8 isolation input channels on each PCI-7250 / 7251 board.
The status of the 8 channels can be read from the isolation input
register. Each bit is corresponding to each channel. As the DI status
are controlled by one bits of the control register. The bit value “1”
means input voltage is high and “0” menas input voltage is low.
Data Format :
Relay Output :
Bit 7 6 5 4 3 2 1 0
Iso. Input
DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0
Bit 15 14 13 12 11 10 9 8
Iso. Input
DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8
(Note: bit#8~15 is for cPCI-7252 only)
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