Rockwell Automation 1794-XXXX FLEX I/O High-Density Analog Modules User Manual
Page 56
Publication 1794-UM062A-EN-P - September 2012
48
Data Tables
EN
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Write word 0
QS
0
0
0
CAB
C89
C67
C45
C23
C01
Write word 1
Where:
PU = Power up bit
S = sign bit (in 2’s complement)
FP = Field power off
GF = General fault
NU = Not used
Rx = Out of range (x = associated channel)
EN = Enable
QS = Quick step bit – allows input filter to be reduced during rapid signal changes
Cxx = Configuration
Memory Map – 1794-IE12 Analog Input Module
Decimal Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Size
Octal Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Read/Write Words
Range Selection Bits – 1794-IE12 Analog Input Module
Range
Out of Range
Range Setting
Cxx Channel
Configuration
-10…+10V DC
< -10.0V or > 10.0V
Set bits for each
channel pair
00 = off
01 = 0…20 mA
10 = 4…20 mA
11 = ±10V
C01 for channels 0 and 1
C23 for channels 2 and 3
C45 for channels 4 and 5
C67 for channels 6 and 7
C89 for channels 8 and 9
CAB for channels 10 and 11
4…20 mA
< 4.0 mA or > 20.0 mA
0…20 mA
< 0.0 mA or > 20.0 mA
Where:
Cxx = associated channel pair
Word/Bit Descriptions – 1794-IE12 Analog Input Module
Word
Decimal Bit
(Octal Bit)
Definition
Read Word 0
Bits 00…14
(00…16)
Channel 0 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17)
Channel 0 analog data sign bit.
Read word 1
Bits 00…14
(00…16)
Channel 1 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17)
Channel 1 analog data sign bit.
Read word 2
Bits 00…14
(00…16)
Channel 2 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17)
Channel 2 analog data sign bit.
Read word 3
Bits 00…14
(00…16)
Channel 3 analog data – 12-bit left justified two's
complement number; unused lower bits are zero;
4…20 mA uses all 16 bits.
Bit 15 (17)
Channel 3 analog data sign bit.