Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Instrukcja Użytkownika Pobierz pdf (Strona 40)

Publication 1769-UM001B-EN-P - October 2002

2-16 How Communication Takes Place and I/O Image Table Mapping

1769-IQ6XOW4 24V DC

Sink/Source Input AC/DC

Relay Output Module

(6 Point In, 4 Point Out)

Output Data

For each 1769-IQ6XOW4 module, output data word 0 contains the

control program’s directed state of the discrete output points. Bits 4 to

15 are not used.

Input Data

For each 1769-IQ6XOW4 module, input data word 0 contains the

current state of the field input points. Input data word 1 contains the

state of the module’s output data (output data echo). During normal

operation (controller in Run), 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 (Hold Last or User-Defined Safe

State)

• Fault Mode configuration (Hold Last or User-Defined Safe State)

For the 1769-IQ6XOW4, input data word 0 bits 6 to 15 are not used.

Word

Bit Position

1514131211109876543210

0 0 0 0 0 0 0 0 0 0 0 0 wwww

w = write

Word

Bit Position

1514131211109876543210

real

inputs0

0 0 0 0 0 0 0 0 0 0rrrrrr

0 0 0 0 0 0 0 0 0 0 0 0rrrroutput

data

echo

r = read

IMPORTANT

Input data word 1 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.

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 203 204

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Rockwell-automation 1769-ADN Compact I/O 1769-ADN DeviceNet Adapter Instrukcja Użytkownika Strona 40