Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Manual de usuario descargar pdf (Pagina 39)

Publication 1769-UM001B-EN-P - October 2002

How Communication Takes Place and I/O Image Table Mapping 2-15

1769-OW16 AC/DC Relay

Output Module (16 Point)

Output Data File

Data output bits are turned on or off using the bit positions in Word 0.

1 = output on

0 = output off

Example: To turn on bit position 12, type 1 in Word 0, Bit 12.

For each module, slot x, word 0 in the output data file contains the

control program’s directed state of the discrete output points.

Output Module’s Input Data File

For each module, slot x, input data file word 0 contains the state of

the module’s output data (output data echo) file word 0. During

normal operation, these input bits represent the logic state that the

outputs are directed to by the control program. They are also

dependent upon the:

• Program Mode configuration (if supported by the controller)

• The Fault Mode configuration (if supported by the controller).

Word

Bit Position

1514131211109876543210

0wwwwwwwwwwwwwwww

w = write only

Word

Bit Position

1514131211109876543210

0rrrrrrrrrrrrrrrr

r = read only

IMPORTANT

The output module’s input data file reflects the

output data echo of the module, not necessarily the

electrical state of the output terminals. It does not

reflect shorted or open outputs.

It is important to use this input word if the controller

adapter supports the Program Mode or Fault Mode

function, and if it is configured to use them.

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Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Manual de usuario Pagina 39