CASE STUDY

Northern California: SCADA

The Yuba County Water Agency (YCWA) was in need of upgrading an unserviceable supervisory, control, and data-acquisition (SCADA) system. The monitoring network consisted of two dams, two rivers, and several irrigation ditches and penstock tubes. Combinations of water levels, flow, and temperature are measured at these locations.

Geo-Watersheds Scientific (GWS) won the contract to design, install, and cut over the new system. GWS chose CSI hardware and software to do the job.

The flexibility to measure many sensor types, generate output signals, and interface to Wonderware software was required, and made Campbell Scientific products the best choice.

Wonderware is a Windows-based human-machine interface (HMI) industrial software. After the hardware upgrade, control of the system would be converted to Wonderware. Before the conversion to Wonderware, the system was controlled by Open Sys-tem International (OSI).

Before and throughout the upgrade, YCWA operated an OSI hardware/soft-ware system to monitor and control the SCADA network. The OSI system used 24 0-5V signal inputs that rep-resented 24 monitored parameters in the network.

The project proceeded in phases. First, the remote stations were proven to measure all the remote sensors. All the values measured in the field had

Campbell SCADA systems used to monitor and control county water system

campbellsci.com/california-scada

More info: 435.227.9050

Case Study Summary

Application: Upgrading system that monitors health of two dams and associated systems Location: Yuba County, California, USASponsoring Organization: Yuba County Water Agency (YCWA) Contributors: Austin McHugh, Geo-Watersheds Scientific (GWS)Integrators: Geo-Watersheds Scientific (GWS)Products Used: CR6, CR800, RF450, SDM-AO4 Measured Parameters: Water level, water flow, water temperature

No. 113: Northern California SCADA

to be gathered to the control room and voltages gener-ated to be output to the OSI hardware/software.

The system consists of 16 hydrologic stations, 6 base sta-tions accessed by IP connection, and 6 repeater stations. Each hydrologic station consisted of one or a few water-level or water-flow sensors. Two stations also monitor water temperature.

The 24 0-5V output signals are generated by 7 SDM-AO4s connected to the base (main) CR6 datalogger acting as a data accumulator. Data accumulation is handled by the CSI PakBus communication protocol using the CRBasic GetVariables instruction in the main CR6. It gathers 24 variables from 16 remote stations (CR800s). One instance of the instruction is used per remote station.

Once the entire network was confirmed to function, the cutover process commenced, followed by a successful 30-day final site-acceptance-test burn-in. After the network was running successfully, with over 99-percent data collec-tion, the process to convert to Wonderware commenced.

Instead of the digital-to-analog conversion required by OSI, Wonderware uses DNP3 protocol to transfer data digi-tally over the Internet or intranet.

The upgrade has yielded multiple improvements: • Data values are collected at more frequent time

intervals. • Nine new stations were added to the network. • A larger variety of measurements are being made. • Additional data tables are generated for multiple

end users. • A transition path from the analog signals of OSI to

the digital values for Wonderware was enabled. • Operators can easily make more measurements avail-

able for Wonderware. • The dataloggers will convert water levels to discharge

values by applying rating calibrations.

This hydro-SCADA network will have support for many years to come.

CAPTIONS

Photo Captions:

- Bullards Bar Dam, photo by Charles Johnck

- On Site Acceptance bench Test, photo by Austin McHugh

- Colgate Power House Master and Wonderware CR6s with SDM-AO4s, photo by Ryan Coursey-Willis

- Michael McCool of GWS installing CR800 in instrument shel-ter, photo by Ryan Coursey-Willis

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HallwoodStation and RF450 Communication Network Details

Network ID 35

Brows ValleyIrrigation Ditch

(BVID)FW s/n 9375251

CR1000-40Hallwood Main Canal

(HWMC)FW s/n 9377423

CR1000-30

Brophy South Yuba(BRSY)

FW s/n 9381563CR1000-20

Marysville(MYVL)

FW s/n 9377611CR800-10

HallwoodRepeater(HALL)

No Datalogger

Surface-Water Station

RF450 Radio Repeater Station

RF450 Base Station Radiowith IP connection

Key

Hydro SCADA Server

Radio path line

RF450 Base Station withIP and measurements

SubNet 0,0

SubNet 0,F

SubNet 0,F

SubNet 0,F

SubNet 0,F

Hydro-SCADA Upgrade

8/18/2015

Hallwood RF450 Radio Design Details

1 1None

AMcHug , Geo-Watersheds Scientific

YCWA_Hallwood_Network_Details_Diagram

0

3

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April 4, 2016

Oregon PeakStation and RF450 Communication Network

Network ID 45

Surface-Water Station

RF450 Radio Repeater Station

RF450 Base Station Radiowith IP connection

Key

Oregon Peak (ORPK)Primary Repeater Tower

Master/Base RF450 Radio

Hydro SCADA Server

Log CabinDownstream

(LCDS)Slave RF450 Radio

CR800

Log CabinRepeater (LNRU)

Secondary Repeater TowerRepeater RF450 Radio

Log CabinUpstream (LCUS)

Slave RF450 RadioCR800

LogCabin(LGCB)

Slave RF450 RadioCR800

Our HouseDownstream

(OHDS)Slave RF450 Radio

CR800

Our House(ORHS)

Slave RF450 RadioCR800

Our HouseRepeater (ONRU)

Secondary Repeater TowerRepeater RF450 Radio

South YubaJones Bar

Slave RF450 Radio(SYJB)CR800

Jones BarRepeater (JNRU)

Secondary Repeater TowerRepeater RF450 Radio

Radio path line

RF450 Base Station withIP and measurements

Hydro- SCADA Network Upgrade

01/12/2016

Oregon Peak RF450 Radio Telemetry Design

1 1None

AMcHugh , Geo-Watersheds Scientific

YCWA_OrPk_Network_Diagram

1

Lohman Ridge TunnelRepeater (TNRU)

Secondary Repeater TowerRepeater RF450 Radio

4