Allen-Bradley 1734-OB2, Руководство пользователя, Страница: 113 / 221

Rockwell Automation Publication 1734-UM001E-EN-P - July 2013
POINT I/O Module Data 115
I/O messages are sent to (consumed) and received from (produced) the
POINT I/O modules. These messages are mapped into the processor’s memory.
The 1734D-IB8XOB8E module produces one byte of input data (scanner Rx)
status. It consumes one byte of output data (scanner Tx).
The 1734D-IB8XOW8 module produces one byte of input data (scanner Rx)
status. It consumes one byte of output data (scanner Tx).
ATTENTION: Whatever field power you supply is connected to the
internal field-power bus. For example, if 120V AC is applied to the
power connections, there will be 120V AC applied to the modules
through the internal field-power bus.
POINT I/O modules to the right of the module will also have that
internal power bus voltage applied, unless you use a 1734-FPD,
1734-EP24DC, or 1734-EPAC module to interrupt and change the field
power-bus voltage.
Default Data Map for the 1734D-IB8XOB8E DC Input/Output Module
Message Size: 1 Byte
7 6 5 4 3 2 1 0
Produces
(scanner Rx) Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Input Data
Where: 0 = off, 1 = on
Message Size: 1 Byte
7 6 5 4 3 2 1 0
Consumes
(scanner Tx) Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Output Data (or
state)
Where: 0 = off, 1 = on
Default Data Map for the 1734D-IB8XOW8 DC Input/Relay Output Module
Message Size: 1 Byte
7 6 5 4 3 2 1 0
Produces
(scanner Rx) Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Input Data
Where: 0 = off, 1 = on
Message Size: 1 Byte
7 6 5 4 3 2 1 0
Consumes
(scanner Tx) Ch7 Ch6 Ch5 Ch4 Ch3 Ch2 Ch1 Ch0 Output Data
Where: 0 = off, 1 = on