Allen-Bradley 1794-IE8 Series B

4–9 Configuring Your Module and Reading Status from Your Module with a Remote I/O Adapter
Publication 17946.5.2 - May 1996
4 Input/2 Output Analog Combo Module (Cat. No. 1794IE4XOE2 Series B)
Module Image
I/O Image
Input Data Channel 0
Input Data Channel 1
Input Data Channel 2
Input Data Channel 3
Output Data Channel 0
Output Data Channel 1
Underrange & Diag.
Output Channel 0 Safe State
Not used
Not used Full Range and Configure Select
Not used
Input Size
Output Size
0 to 8 Words
0 to 5 Words
Read
Write
M
PU
Output Channel 1 Safe State
Not used
Analog Combo Module (1794-IE4XOE2/B) Read
Word/Dec. Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Word/Octal Bit 17 16 15 14 13 12 11 10 07 06 05 04 03 02 01 00
Read Word 0 S Analog Value Input Channel 0
Word 1 S Analog Value Input Channel 1
Word 2 S Analog Value Input Channel 2
Word 3 S Analog Value Input Channel 3
Word 4 PU Not used - set to 0 W1 W0 U3 U2 U1 U0
Where: S = sign bit (in 2's complement)
W = Diagnostic bits for current output wire broken or load resistance high. (Not used on voltage outputs.)
U = Underrange bits for 420mA inputs
PU = Power up bit
Word/Bit Descriptions for the 1794-IE4XOE2/B Analog Combo
Module Read
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20mA uses all 16 bits.
Word 0
Bits 15 (17)
Channel 0 analog data sign bit.
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20mA uses all 16 bits.
Word
1
Bits 15 (17) Channel 1 analog data sign bit.
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20mA uses all 16 bits.
Word
2
Bits 15 (17) Channel 2 analog data sign bit.