Advantech PCI-1710HG Dokumentacja Pobierz pdf (Strona 124)

114

C.6 MUX Control — BASE+4 and BASE+5

Table C-8 Register for multiplexer control

Write Multiplexer Control

Bit # 7 6 5 4 3 2 1 0

BASE + 5

STO3

STO2

STO1

STO0

BASE + 4

STA3

STA2

STA1

STA0

STA3 ~ STA0 Start Scan Channel Number

STO3 ~ STO0 Stop Scan Channel Number

n When you set the gain code of analog input channel n, you

should set the Multiplexer start & stop channel number to

channel n to prevent any unexpected errors. In fact BASE+4

bit 3 to bit 0, STA3 ~ STA0, act as a pointer to channel n’s

address in the SRAM when you program the A/D channel

setting (refer to Section C.5).

Caution!

We recommend you to set the same start and stop channel when writing to

the register BASE+2. Otherwise, if the A/D trigger source is on, the

multiplexer will continuously scan between channels and the range setting

may be set to an unexpected channel. Make sure the A/D trigger source is

turned off to avoid this kind of error.

The write-only registers of BASE +4 and BASE+5 control how the

multiplexers (Multiplexer) scan.

1 2 ... 119 120 121 122 123 124 125 126 127 128 129 ... 163 164

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Advantech PCI-1710HG Dokumentacja Strona 124