GE Mark VIe System Manual page 56

1.7.12 Rate of Response
Mark VIe and Mark VIeS controllers can run at a variety of frame rates to meet the application needs of the industrial control solution. Control systems are tuned
accordingly, based on a variety of factors including: complexity of controller application logic, processor type, and number of I/O and other interfaces used. The following
diagram provides an example of typical processes that occur during a single controller frame in sequence.
Mark VIe Subsystem
TMR Mark VIe
Control I/O
TMR IONet
TMR set of
Mark VIe Controllers
Note s
Assu mes a Triple Mo dular Re dun dant (T MR) confi gurati on, ve rsus dual, or si mpl ex
Su bsyste m a cti vities i dentifi ed with a gray rectangl e
Activiti es that sp an multi ple subsyste ms i dentifi ed with a d ashed
56 GEH-6721_Vol_I_BP
Fresh state of outputs
Start of frame applied to terminal block
screws, latency is
dependent on circuit type
Transmission of
outputs from
controllers to I/O
packs
Input and state variables copied into variable space in
prep for execution of control logic (application code)
Control Logic
Time to execute based on quantity and complexity of
control blocks
I/O packs sample inputs,
latency is dependent on
circuit type
Synchronization of data between R,
S, and T controllers using IONet
brown rectangle
GEH-6721_Vol_I Mark VIe and Mark VIeS Control Systems Volume I
Public Information
End of frame
Transmission of
inputs from I/O
packs to
controllers
Time