Plant_4_Program_Requirements_and_Functional_Review_40_95_00_A....pdf

ARCF Natomas Basin Reach D Windows 40 95 00-1 March 2018

Pumping Plant 4 Reconstruction Attachment No. 1

Attachment No. 1

Section 40 95 00

RD1000 Pumping Plant 4

Programming Requirements & Functional Overview

PLC and OIT

OVERVIEW

The Pumping Plant 4 Control System includes a Programmable Logic Controller (PLC), Operator

Interface Terminal (OIT)) and miscellaneous control devices. The function is to monitor and control the operation of the RD1000 pump station.

PLANT 4 CONTROL SYSTEM

The primary function of Plant 4 is to pump water from the North Drainage Canal to the Natomas Cross

Canal as part of the area flood control. There are three pumps, Pump No. 1 and Pump No. 3 are 600HP and Pump No. 2 is 450HP. The pump motors are 2300 volt and are started using reduced-voltage non-reversing starters. The vertical pumps are in a pump sump connected to the North Drainage Canal through trash racks. The trash racks include level sensors on both sides of the trash racks and are called to run when any pump is running. The pumps are controlled from the PLC based on sump level. The level sensors are reactive air pressure transmitters (bubbler type) as manufactured by TESCO.

Automatic Operation:

The pump bay level sensor will connect to an Allen-Bradley CompactLogix 1769-L18ER-BB1B programmable logic controller (PLC) with additional I/O modules as follows to monitor and control station:

Discrete Input (DI) – 1734-IB8 – 24V DC, 8 Channel Sink Input Module

Discrete Output (DO) – 1734-OB8E – 24V DC 8 Channel Source Output Module, Electronically Protected

Analog Input-(AI) – 1734-IE4C – 24V DC 4 Channel High Density Analog Current Input

Module

Analog Output-(AO) – 1734-OE4C – 24V DC 4 Channel Analog Current Output Module

. The pressure from the reactive air bell is converted to a 4-20mADC signal which is set for water level. The PLC will control the start/stop operation of the pump and alarm generation. The North

Drainage Canal reactive air level sensor will have a 4-20mADC signal which shall be routed to the PLC for monitoring purpose. The start/stop of each pump is individually controlled by the PLC

Start/Stop level setpoints (adjustable via the OIT). If the pump bay water level is at a low level, all pumping will stop. If the pump bay water level is at high level, then an alarm shall be generated.

If a pump motor fails to start within a preset time (adjustable via the OIT), the PLC shall generate a Pump Failed Alarm and lock out the automatic operation until reset by the operator (via the

OIT).

21 March 2018

When a pump is started the trash rakes (if in automatic mode) shall be called to operate by the

PLC on a repeat cycle basis. The on time and off time shall be adjustable via the OIT.

DEVICE LOGIC

The following programming functions shall be included:

Level Transmitters:

The level transmitters shall be programmed such that the final water level data is in elevation

(NGVD 88 datum). In the case of pressure transducers, adjustable parameters shall include transducer range in feet (4mA = 0, 20mA = full range) and elevation in feet of transducer setting.

Thus, the water elevation will be the setting plus the value. The decimal value of the data shall be at least the resolution of the transducer. The range, and elevation setpoint shall be adjustable via the OIT.

The transducer shall be monitored for failure and alarmed accordingly. Equivalent values less than 3.8mA or greater than 20.2mA shall be cause for device failure alarm. Failure reset shall be from the OIT.

The Pump Bay Level Data and the North Drainage Canal Level Data shall be compared, and an alarm generated if the differential is above a preset value.

High and Low-Level Alarms shall be able to be set (adjustable via OIT) from the Level Data.

Alarm conditions shall be filtered using a time delay (adjustable via OIT). Alarm conditions shall be automatically reset using differential (adjustable via OIT).

Pump Motors

When a pump is called to operate, a startup timer will be initiated. If the pump status is not “ON” before the startup timer has timed out the pump shall be considered “FAILED”, shall be alarmed and made unavailable for service. Failure reset shall be from the OIT. The startup timer should consider the pump controllers back spin timer function before failure is initiated. Pump run time shall be accumulated based upon pump run status (not dependent upon mode).

Intrusion

When the door switch is initiated it shall be treated as an alarm and time tagged. The operator shall use the OIT to input a preset code to disarm and reset the alarm within a preset time. When the operator logs-out, the door alarm will be rearmed after a preset time. If the operator fails to log-out, the alarm will be automatically rearmed after a preset time (adjustable via OIT).

Input/output

The following tables list the Input/Outputs and functions

PUMPING PLANT 4 – PLC

I/O Type Description Function

Digital Input Unit 1 857 Relay Fault Alarm

Digital Input Unit 1 Running Status

Digital Input Unit 1 HOA Sw in Auto Allow PLC Control

Digital Input Unit 1 HOA Sw in Hand Status

Digital Input Unit 1 Motor High Temp Alarm

Digital Input Unit 2 857 Relay Fault Alarm

Digital Input Unit 2 Running Status

Digital Input Unit 2 HOA Sw in Auto Allow PLC Control

Digital Input Unit 2 HOA Sw in Hand Status

Digital Input Unit 2 Motor High Temp Alarm

Digital Input Unit 3 857 Relay Fault Alarm

Digital Input Unit 3 Running Status

Digital Input Unit 3 HOA Sw in Auto Allow PLC Control

Digital Input Unit 3 HOA Sw in Hand Status

Digital Input Unit 3 Motor High Temp Alarm

Digital Input Trash Rake #1 Auto Allow PLC Control

Digital Input Trash Rake #1 Local Allow PLC Control

Digital Input Trash Rake #1 Pwr On Status

Digital Input Trash Rake #1 Running Status

Digital Input Trash Rake #1 Overtorque Alarm

Digital Input Trash Rake #1 Overtorque S/D Alarm

Digital Input Trash Rake #2 Auto Allow PLC Control

Digital Input Trash Rake #2 Local Allow PLC Control

Digital Input Trash Rake #2 Pwr On Status

Digital Input Trash Rake #2 Running Status

Digital Input Trash Rake #2 Overtorque Alarm

Digital Input Trash Rake #1 Overtorque S/D Alarm

Digital Input Bldg Smoke Alarm Alarm

Digital Input Building Door Switch Status / Alarm

Digital Input Pump Bay Hi Level Alarm

Digital Input UPS Power Fail Alarm

Digital Input UPS Battery Low Alarm

Digital Input UPS Fail Alarm

Digital Input 24VDC Power Supply Fail Alarm

Digital Input PLC Power Supply Fail Alarm

Digital Input Unit #1 Monitor Cable Alarm

Digital Input Unit #2 Monitor Cable Alarm

Digital Input Unit #3 Monitor Cable Alarm

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Input [spare]

Digital Output Unit 1 Start/Stop Control

Digital Output Unit 2 Start/Stop Control

Digital Output Unit 3 Start/Stop Control

Digital Output Pump Bay Reactive Air Call Control

Digital Output North Canal Reactive Air Call Control

Digital Output Trash Rake #1 Start/Stop Control

Digital Output Trash Rake #2 Start/Stop Control

Digital Output [spare]

Digital Output [spare]

Analog Input Pump Bay Level Display & Alarm

Analog Input N. Drainage Canal Level Display & Alarm

Analog Input [spare]

Analog Input [spare]

OIT Functions:

Display screens shall be developed to graphically illustrate the pumping station.

An alarm displays shall include current condition in alarm as well as historical alarms. Alarm conditions shall be time-stamped when they occur and when they are reset. Alarm conditions shall include acknowledge and reset functions. Unacknowledged alarms shall flash, Acknowledged alarms shall be color coded. Alarm conditions that are reset, but still in alarm, shall reappear as unacknowledged alarms.

The OIT shall include level trending capability.

The PLC shall gather power data from the Power Monitor and 857 Relays via Ethernet for display on the OIT.

The OIT shall include provisions for operator log-in/log-out. The displays shall include operator password controls such that modification displays are unavailable without password.

The OIT shall be set to off/standby/blank screen after preset non-use time. The OIT shall wakeup from sleep mode if touched.

The OIT shall be used to disarm the door alarm and log-in and log-out.

Sample OIT Displays

The follow are sample displays which illustrate the type of displays to be developed.

ARCF Natomas Basin Reach D Windows 16911-1 March 2018