Allen-Bradley 1794ASB Series B - Input Analog Module (Cat. No. 1794 IE8 Series B); Analog Input Module (1794 IE8;B) Read; Analog Input Module (1794 IE8;B) Write Configuration Block

3–1 1Communicating with FLEX I/O Modules
Publication 17946.5.3 - May 1996
8 Input Analog Module (Cat. No. 1794IE8 Series B)
Module Image
I/O Image
Input Data Channel 0
Input Data Channel 1
Input Data Channel 2
Input Data Channel 3
Input Data Channel 4
Input Data Channel 5
Input Data Channel 6
Input Data Channel 7
Underrange
Configure select
Input Size
Output Size
0 or 1 Word
1 to 9 Words
PU
Read
Write
Analog Input Module (1794-IE8/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
Word 0 S Analog Value Channel 0
Word 1 S Analog Value Channel 1
Word 2 S Analog Value Channel 2
Word 3 S Analog Value Channel 3
Word 4 S Analog Value Channel 4
Word 5 S Analog Value Channel 5
Word 6 S Analog Value Channel 6
Word 7 S Analog Value Channel 7
Word 8 PU Not used - set to zero U7 U6 U5 U4 U3 U2 U1 U0
Where: S = sign bit (in 2' s complement)
U = Underrange bits for 420mA inputs
PU = Power up bit (Included in series B modules; this bit is 0 in series A modules.)
Analog Input Module (1794-IE8/B) Write Configuration Block
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
Word 0 C7 C6 C5 C4 C3 C2 C1 C0 F7 F6 F5 F4 F3 F2 F1 F0
Where: C = Configure select bit
F = Full range bit