2–6
How Communication Takes Place and I/O Image Table Mapping
Publication 17946.5.5 - October 1996
16point Discrete Output Module (1794OB16) Image Table
Mapping
Module Image
Outputs
Input Size
Output Size
0 or 1 Word
1 or 2 Words
I/O Image
Not used
Not used
Read
Write
Memory Map of 16-Point Discrete Output Module Image Table –
1794-OB16
Dec. Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Size
Oct. Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Size
Not used
Read Word 1
O15 O14 O13 O12 O11 O10
O9
O8
O7
O6
O5
O4
O3
O2
O1
O0
Write Word 1
Not used
Write Word 2
Where O = Output value (O0 corresponds to output 0, O1 corresponds to output 1, etc.)
16point Discrete Input/Output Module Image Table Mapping -
1794IB10XOB6
Input Size
Output Size
0 to 1 Word
0 to 2 Words
Module Image
Inputs
I/O Image
Not used
Outputs
Not used
Read
Write
Not used
Memory Map of 16-Point Discrete Input/Output Module Image
Table – 1794-IB10XOB6
Decimal Bits 15 14 13 12 11
10 09
08
07
06
05
04
03
02
01
00
Size
(Octal Bits)
17 16 15 14 13
12
11
10
07
06
05
04
03
02
01
00
Size
Not used
I9
I8
I7
I6
I5
I4
I3
I2
I1
I0
Read Word 1
Not used
O5 O4 O3 O2 O1
O0
Write Word 1
Not used
Write Word 2
Where
I = Input Channel
O = Output Channel