|
PLC Messages |
|
Programmable logic controllers (PLCs) are used at main stem sites to both control Separation by Code (SbyC) diversion gates and to record the changes in operations at facilities. These can include when the power is turned on or off, the sample rate for smolt monitoring program operations, date the facility goes into primary or secondary bypass, when a gate was opened or closed, and many other options.
The table below shows the types of events currently being monitored by PLCs and recorded directly into the data stream at many PTAGIS-maintained main stem interrogation sites.
|
Event |
Definition |
Domain |
|
Gate Openings per Hour |
Number of times the sample gate will open per hour |
Integer |
|
Gate Sample Rate |
The sample rate in percent |
percent (0-100) |
|
AC Power |
Timestamp system power turned on and off |
On/Off |
|
Divert During Subsample |
Timestamp divert during subsample turned on and off |
On/Off |
|
Full Flow |
Timestamp full flow up (water flowing through it) and down (no water) |
Up/Down |
|
Full Sample Mode |
Timestamp full sample mode was turned on and off |
On/Off |
|
Primary Bypass |
Timestamp primary bypass enabled and disabled |
Enabled/Disabled |
|
Sample Bypass |
Timestamp sample bypass enabled and disabled |
Enabled/Disabled |
|
SbyC |
Timestamp SbyC system enabled and disabled |
Enabled/Disabled |
|
Subsampling |
Timestamp for start and end of subsample |
Started/Finished |
|
Gate Trouble |
Timestamp gate trouble alert triggered and turned off |
On/Off |
|
Slide Gate |
Timestamp the slide gate turned on and off |
On/Off |
|
CWT Detected |
Timestamp fish with coded wire tag detected |
|
|
Bypass Marking Mode |
Timestamp bypass marking mode enabled and disabled |
Enabled/Disabled |
|
Bypass Mode |
Timestamp bypass mode enabled and disabled |
Enabled/Disabled |
|
Marking Mode |
Timestamp marking mode enabled |
Enabled/Disabled |
|
Gate Mode |
Timestamp gate switched between reverse and forward operational modes |
Reverse/Forward |