ProSoft Technology inRAx 3170-PDP, User Manual

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How Communication Takes Place and I/O Image Table Mapping 3170-PDP ♦ FLEX Platform
FLEX I/O™ PROFIBUS Adapter
ProSoft Technology, Inc. Page 27 of 152
August 23, 2007
3.2.5 1794-OA8 – 8-point Discrete Output Module Image Table
Mapping
Module Image
Outputs
I/O Image
Not used
Not used
Not used
Input Size
Output Size
0 or 1 Word
1 or 2 Words
Read
Write
1794-OA8 Memory Map
Decimal
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 Read Words
Not used Read Word 1 Read Word 1
Not used 07 06 O5 O4 O3 O2 O1 O0 Write Word 1
Not used Write Word 2 Write Word 2
Where O = Output value (where O0 corresponds to output 0, O1 corresponds to output 1, etc.)
3.2.6 1794-OW8 – 8-point Discrete Relay Output Module Image Table
Mapping
Module Image
Outputs
I/O Image
Not used
Not used
Not used
Input Size
Output Size
0 or 1 Word
1 or 2 Words
Read
Write
1794-OW8 Memory Map
Decimal
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 Read Words
Not used Read word 1 Read Word 1
Not used 07 06 O5 O4 O3 O2 O1 O0 Write Word 1
Not used Write word 2 Write Word 2
Where O = Output value: where O0 corresponds to output 0, O1 corresponds to output 1, etc., and
when bit = 0, the output is off; when bit = 1, the output is on.