Rockwell Automation 1732E-OB8M8SR EtherNet/IP Dual Port 8-Point SOE Input and Scheduled Output Modules UM - Manual (Page 64)

54 Rockwell Automation Publication 1732E-UM003B-EN-E - March 2014
Chapter 8 Specific Features of the 1732E-IB8M8SOER Sequence of Events Input Module
• FIFO – Each channel provides buffering of the timestamped input data for
every input transition. A minimum of ten buffers is provided for every
input channel (total twenty data buffers for every input to contain both
OFF to ON and ON to OFF transition). The stored data is utilized on a
first-in-first-out (FIFO) basis.
• Per Point Mode – The module produces timestamps for up to 2 input
transitions per input, one for OFF to ON transitions and another for ON
to OFF transitions; these timestamps can occur simultaneously on separate
inputs.
For detailed information about operational modes, see Use the Sequence of
Events Input and Scheduled Output Modules on page 63.
Timestamp Latching Timestamp Latching can be used to prevent the module from overwriting input
data once it is timestamped. This feature is available on the 1732E-IB8M8SOER
input module.
• If Timestamp Latching is enabled, the module timestamps an input in a
given direction and ignores future input transitions in that direction until
the controller acknowledges the timestamp data already received.
• If Timestamp Latching is disabled, the module timestamps every input
transition and may overwrite previously recorded timestamp data if the
controller does not acknowledge the data quickly enough.
This feature is set on a modulewide basis and is enabled by default. It works in
both FIFO and Per Point modes.
Use the Configuration tab in RSLogix 5000 software to enable Timestamp
Latching, as shown in the example.
Select this box to enable the
Timestamp Latching feature.
Unselect the box to disable
the feature.