Filter
Top Products
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 output module) within a few milliseconds of the new output being sent
from the bus controller to the Bus Interface Unit. (To guarantee that an output changes state, 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.