GE GFK-0825F Throughput

GFK-0825F Chapter 4 Operation 4-13
4
Throughput
If an output in the station is tied to an input in the same station, the output changes state (or value,
in the case of an analog outpu t m odule) within a few millisecon ds of the new output being sen t
from the bus controll er t o th e Bus Interface Unit. (To guaran t ee that an output changes stat e, that
state must be present for at least one BIU sweep time or bus scan time, whichever is greater.)
The input which is tied to the output responds as soon as any load-effects have settled out and input
filtering is completed. This may occur as soon as the Bus Interface Unit's next I/O scan.
If the host is a PLC, an input must be present for at least one PLC sweep time plus one Genius bus
scan time plus one BIU sweep time to guarantee its detection by the PLC. If the input changes
state only briefly, and then changes again before the input data is sent on the bus, the interim state
may be overwritten in the Bus Interface Unit's internal memory by some new input state or value
before it can be sent.