Allen-Bradley 1794ASB Series B - Input;2 Output Analog Combo Module (Cat. No. 1794 IE4 XOE2 Series B); Analog Combo Module (1794 IE4 XOE2;B) Read; Analog Combo Module (1794 IE4 XOE2;B) Write Configuration Block

3–14 Communicating with FLEX I/O Modules
Publication 17946.5.3 - 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.
Not used
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
Safe State Value - Output Channel 0
Safe State Value - Output Channel 1
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 (Included in series B modules; this bit is 0 in series A modules.)
Analog Combo Module (1794-IE4XOE2/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
Write Word 0 S Analog Data - Output Channel 0
Word 1 S Analog Data - Output Channel 1
Word 2 0 Not used - set to 0 M1 M0
Word 3 Not used C5 C4 C3 C2 C1 C0 0 0 F5 F4 F3 F2 F1 F0
Words 4 and 5 Not used - set to 0
Word 6 S Safe State Value - Output Channel 0