G3F-Ad3A / G4F-Ad3A - LG G3F-AD3A User Manual

Chapter 6 Buffer memory

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
– – –
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
– – – –
Ignored
bit10 bit9
– – – –
Ignored
bit8 bit7 bit6 bit5 bit4
– Ch7 Ch6 Ch5 Ch4
Channel enable
0 : A/D conversion disable
1 : A/D conversion enable
bit8 bit7 bit6 bit5 bit4
– Ch7 Ch6 Ch5 Ch4
Assign input voltage range
0 : 1 ~ 5 VDC and DC4~20mA
1 : 0 ~ 10 VDC
6 - 6
bit3 bit2 bit1 bit0
Ch3 Ch2 Ch1 Ch0
bit3 bit2 bit1 bit0
Ch3 Ch2 Ch1 Ch0