04-14-26 Agenda Packet - Laserfiche WebLink

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City of Arden Hills, MN – 25X.137753 LIFT STATION CONTROL SYSTEM January 2026 PAGE 26 90 04-24 ©2026 Design Tree Engineering, Inc All Rights Reserved 5. Signal types and levels. 6. Interface devices where required. 7. Operating environment conditions. 8. All other aspects of field devices impacting on the design of the system. H. All spare and unused I/O shall be wired to terminal strips. This wiring shall include all auxiliary devices and components to complete the installation (e.g., interposing relays, wireways). I. It shall be the responsibility of Contractor to include all the inputs and outputs required to maintain existing functionality and to meet all aspects of this specification, regardless of whether they are specifically included in the I/O listing in this specification. SCADA SYSTEM PROGRAMMING A. Provide all programming, wiring, and hardware modifications to transmit, receive, display, trend, report, alarm, and handle the data. B. Programming shall include but not be limited to 1. Local PLC 2. Local OIT 3. All other sites which may need programming modifications to integrate new lift station. C. A copy of the complete PLC program shall be saved on the respective PLC memory card. D. The PLC’s shall be programmed to retain setpoint and other critical data so that the PLC will automatically resume the process controls when power is restored to the panel after a power failure. E. SCADA system shall be designed and programmed to operate without the use of either the SCADA PC or HMI. Meaning, programming, data processing, control loops, algorithms and other programming features shall reside on the PLC. If the SCADA PC or HMI is off or not operating, the control system shall still operate as specified. F. Screens shall be programmed to display each process, monitoring point, and setpoint for the Lift Station. Graphics shall be designed in such a manner to symbolize in 2D of the actual process and equipment being controlled. Screens with text buttons and text indicators only will not be allowed. G. Screen background shall be a solid color, other graphics in the background will not be accepted. H. Display the call, run, fail, position and other status points of each piece of equipment and alarms for the associated equipment. I. Screen(s) shall allow the operator to adjust all variables and view real-time data associated with the process control and equipment. J. Screens(s) shall display alarms and allow the operator to acknowledge the alarms at any location. K. Provide screens required for the system operations as specified in Contract Documents. L. Systems integrator shall expect approximately 8 additional hours of coordinating screen layouts and display options with the Owner. Systems integrator shall make programming changes to the screens as requested by the Owner/Engineer, at no additional cost to the Owner. 1. Contractor to schedule this meeting with the Owner Representative no less than one week prior to the meeting. 2. A copy of all screen shall be provided to the owner no less than one week prior to the meeting to allow adequate time to review.