PACSystems VersaMax Genius Network Interface User Manual Section 3
GFK-1535D Jan 2023
Operation 53
If the host is a PLC, the input must be present for at least one PLC sweep
time plus one Genius bus scan time plus one NIU 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 NIU’s internal memory by some
new input state or value before it can be sent.
As mentioned on the next page, if the NIU’s Enhanced Diagnostics
parameter is set to enabled, the NIU is expected to respond less rapidly.
3.4.1 Fault Transfer Times
The time required to transfer the Genius datagram message that
contains a fault depends on the Genius Baud Rate. The table below lists
the Genius transfer time for the longest datagram required. Please note
that the GNIU must send a series of datagrams to report a single fault.
The data in this table should only be used for estimating Fault Reporting
Latency as described in GFK-1277.
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