Rockwell Automation 1794-IE4XOE2,1794-IE8,1794-OE4,D17946.5.2 FLEX I/O ANALOG MODULE User Manual
Page 54
5–10
How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Publication 1794Ć6.5.2 - May 1996
Analog Output Module (1794-IE4XOE2/B) Write
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 Words
S
Analog Data - Output Channel 0
Write Word 1
S
Analog Data - Output Channel 1
Write Word 2
Not used - set to 0
OE1 OE0
Write Word 3
Not used
C5
C4
C3
C2
C1
C0
0
0
F5
F4
F3
F2
F1
F0
Write Word 4
Not used - set to 0
Write Word 5
thru 10
Where:
OE = Output enable bits (bit 00 corresponds to output 0, bit 01 corresponds to output 1). ATTENTION: These bits must be set to 1.
S = Sign bit (in 2's complement)
C = Configure select bit
F = Full range bit
Range Selection Bits for the 1794-IE4XOE2 Analog Combo
Module
Channel No.
Input
Channel 0
Input
Channel 1
Input
Channel 2
Input
Channel 3
Output
Channel 0
Output
Channel 1
F0
C0
F1
C1
F2
C2
F3
C3
F4
C4
F5
C5
Decimal Bit
00
08
01
09
02
10
03
11
04
12
05
13
4-20mA
0
1
0
1
0
1
0
1
0
1
0
1
0-10V dc/0-20mA
1
0
1
0
1
0
1
0
1
0
1
0
Ć10 to +10V dc
1
1
1
1
1
1
1
1
1
1
1
1
Off
1
0
0
0
0
0
0
0
0
0
0
0
0
C = Configure select bit
F = Full range bit
1
When configured to off, individual channels will return either 0V or 0mA on Series B modules; 2V or 4mA on Series A modules.
Word/Bit Descriptions for the 1794-IE4XOE2 Analog Combo
Module
Word
Decimal Bit
Definition
Read Word 1
Bits 00-14
Channel 0 analog data - 12Ćbit left justified two's complement
number; unused lower bits are zero; 4Ć20mA uses all 16 bits.
Read Word 1
Bits 15
Channel 0 analog data sign bit.
Read Word 2
Bits 00-14
Channel 1 analog data - 12Ćbit left justified two's complement
number; unused lower bits are zero; 4Ć20mA uses all 16 bits.
Read Word 2
Bits 15
Channel 1 analog data sign bit.
Read Word 3
Bits 00-14
Channel 2 analog data - 12Ćbit left justified two's complement
number; unused lower bits are zero; 4Ć20mA uses all 16 bits.
Read Word 3
Bits 15
Channel 2 analog data sign bit.
Read Word 4
Bits 00-14
Channel 3 analog data - 12Ćbit left justified two's complement
number; unused lower bits are zero; 4Ć20mA uses all 16 bits.
Read Word 4
Bits 15
Channel 3 analog data sign bit.