Rockwell Automation T3832 ICS Regent Historian Package for Winterpret - Manual (Page 42)

Historian Package for W INTERPRET (T3832)
4 2
Industrial Control Services
1. Function block is in the run mode, but no variable entries
are recorded (Clear contact is on, or start is off, or start
contact is on but time accumulate has not reached the
sample time).
2. Variable entries are being recorded.
3. The process historian buffer is being uploaded to the PC
running W INTERPRET .
Using a process historian function block containing 100
variable entries, the scan times shown in Table 4 were
observed.
Table 4. Process Historian: Characteristic Scan Times.
MODE SCAN TIME (msec)
Running but no variable entries recorded Negligible
100 variable entries recorded 1
2000 word buffer uploaded 1
Safety Considerations
The sequence of events and process historian function blocks
are TÜV certified for Risk Class 5 as non-interfering. These
function blocks are non-interfering because they do not
perform any control actions. They can be used to monitor and
record Regent I/O and other variables that are used for safety
critical functions.