supporting Sequence of Events

Publication 1732E-UM002A-EN-P - March 2010
60 Using the Module
Manage the Data
The module sends all of its input data to the controller the next RPI after an
input transition has been timestamped and at each subsequent RPI. You must
manage the data coming from the module.
The following occurs in the process of the managing data coming from the
module:
1. The module sends data to the controller.
2. The controller copies the relevant portions of the input data to separate
array.
3. At the user’s discretion, the controller clears latched timestamp data
from the module via the O.EventAck and O.NewData tags, preparing
the module to timestamp the next transition.
This process is described in the rest of this section.
Module Sends Data to the Controller
The following figure shows an example of the module sending data to the
controller. In the example, the following occurs:
1. Input 1 transitions from OFF to ON. (The input has Timestamp
Capture enabled).
2. The module timestamps the transition.
3. The module sends its input data, including the transition timestamp
from input 1, to the controller.
1. Input 1 transitions
from OFF to ON.
2. Module timestamps
the transition.
3. Module sends input
data to the controller.
1732E-IB16M12SOEDR ControlLogix controller
I.Fault
I.EventOverflow
I.OffsetTimeStamp
I.EventNumber
I.Timestamp[16].OffOn[2]
I.Timestamp[16].OnOff[2]
I.Data
I.NewData
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 1 0 1 1 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
I.ShortCircuit
I.OpenWire
I.GrandMasterClockID
I.LocalClockOffset
I.SyncedToMaster