XC series analog expansions User Manual Page 48 of 53
MANU003R2V1
Every expansions filter option is set via a special FLASH data register FD inside the PLC. See
the following chart:
Module
Channel’s ID
0CH - 3CH
4CH - 5CH
1#
module
FD8250
FD8251 Low byte
2#
module
FD8258
FD8259 Low byte
3#
module
FD8266
FD8267 Low byte
4#
module
FD8274
FD8275 Low byte
5#
module
FD8282
FD8283 Low byte
6#
module
FD8290
FD8291 Low byte
7#
module
FD8298
FD8299 Low byte
Each channel’s filter mode is assigned by a corresponding register’s 4 bits. Each bit’s definition is
shown in the following table:
Take module 1 as example
Register FD8250:
Channel 1
Channel 0
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
00: 1/4 filter
01: no filter
10: 1/2 filter
11: 1/3 filter
-
-
00: 1/4 filter
01: no filter
10: 1/2 filter
11: 1/3 filter
-
-
-
-
-
-
Channel 3
Channel 2
Bit15
Bit14
Bit13
Bit12
Bit11
Bit10
Bit9
Bit8
00: 1/4 filter
01: no filter
10: 1/2 filter
11: 1/3 filter
-
-
00: 1/4 filter
01: no filter
10: 1/2 filter
11: 1/3 filter
-
-
-
-
-
-
7-3 Input filter settings
Take 1# module as example:
FD8250 H O O O O
0CH
1CH
2CH
3CH
FD8251 H O O O O
4CH
5CH
