LG G4F-AD3A User Manual

Page 53

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Chapter 6 Buffer memory

6 - 6

6.2.2 G3F-AD3A / G4F-AD3A

1) Channel enable (Address 00)

- When the power is on, all bits are set as 0 (off) and all channels are disabled.

- In order to enable a channel, set the corresponding bit as 1 (on). For example, turn on

the bit 2 to enable the channel 2.

- Because the conversion time depends on the number of used channel, turning on just

necessary channel can reduce A/D conversion time.

bit15 bit14 bit13 bit12 bit11 bit10 bit9

bit8

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Ch0

Example) To enable channel 1, 2, and 3 for G4F-AD3A :

Write h000D ( turn on bit 1, 2, and 3 ) to buffer 00, and sampling time is

obtained as 3

×

5ms = 15ms.

2) Input voltage/current type (Address 01)

- This function is available with G3F-AD3A and G4F-AD3A. With the G6F-AD2A, the input

voltage/current type isn’t set by sequence program.

- Turn on the cor responding bit as ‘1’ to set the input voltage/current type as 0 ~ 10 VDC.

The default value is ‘0’ ( 1 ~ 5 VDC and DC4~20mA ).

- When use current input, be sure to set the corresponding bit as ‘0’. Otherwise, the

module will not operate normally.

bit15 bit14 bit13 bit12 bit11 bit10 bit9

bit8

bit7

bit6

bit5

bit4

bit3

bit2

bit1

bit0

Ch7

Ch6

Ch5

Ch4

Ch3

Ch2

Ch1

Ch0

Channel enable
0 : A/D conversion disable
1 : A/D conversion enable

Ignored

Assign input voltage range
0 : 1 ~ 5 VDC and DC4~20mA
1 : 0 ~ 10 VDC

Ignored

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