Allen-Bradley 1794-IE4XOE2 Series B, User Manual, Page: 54 / 73

5–10 How Communication Takes Place and I/O Image Table Mapping with the DeviceNet Adapter
Publication 17946.5.2 - 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
10 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 - 12bit left justified two's complement
number; unused lower bits are zero; 420mA 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 - 12bit left justified two's complement
number; unused lower bits are zero; 420mA 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 - 12bit left justified two's complement
number; unused lower bits are zero; 420mA 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 - 12bit left justified two's complement
number; unused lower bits are zero; 420mA uses all 16 bits.
Read Word 4
Bits 15 Channel 3 analog data sign bit.