Maple Systems OIT Family - Manual (Page 30)

System Speed
The OIT hardware and software were designed in such a way that system performance is
only limited by the communications speed of the PLC, baud rate of the PLC, and the
overhead associated with the PLC protocol driver (the number of characters over and
above the actual data used for checksums, data formatting, etc.). In addition, some PLCs
limit the amount of time spent communicating with external devices (such as OITs) based
on how much time is expended executing ladder rungs. This affects performance of the
OIT update rate for PLC register monitors on the display. For more information, refer to
the Controller Information Sheet that corresponds to your PLC.
Operational Overview 30
1010-0099, Rev. 06