Siemens 125-699 Applications, Control Temperature Setpoints, Day/Night Mode, Control Loops

Page 15

2

Applications

Basic Operation

The Siemens BACnet Heat Pump Controller—Multi-Stage provides Direct Digital Control (DDC) technology for multiple compressor heat pump applications. Temperature control varies with the application. If present, mixed air temperature control and up to three stages of electric heat or staged heating and cooling can be provided.

Control Temperature Setpoints

The controller maintains a specified temperature setpoint based on Day/Night mode, the heating/cooling mode, and the setpoint dial (if used).

Day/Night Mode

The controller maintains the specified day setpoint temperature during daytime hours and the specified night setpoint at night.

Night Mode Override Switch

If the RTS has an override switch, it can be used to command the controller into day mode for an adjustable period of time. This only affects a controller in night mode.

Control Loops

Heating Loop – maintains room temperature setpoint by turning compressors and electric heat stages on and off.

Cooling Loop – maintains room temperature setpoint by turning compressors on and off and using free cooling (mixed air control) when available.

Mixed Air Control Loop

The heat pump is controlled by three Proportional, Integral, and Derivative (PID) control loops; a cooling loop and a heating loop. This section describes the mixed air control loop.

Siemens Building Technologies, Inc.

7

Page 14 Page 16
Image 15
Page 14 Page 16
Contents 125-699 Rev. BA, July Siemens BACnet Heat Pump Controller MultiPage Service Statement To the ReaderCredits Page Table of Contents Reversing Valve Operation Convention Example How to Use This ManualManual Organization Manual ConventionsManual Symbols Notation Symbol MeaningGetting Help Product Overview Ordering NotesApplication Application Description Number Hardware Outputs Hardware InputsReference Controller LED Indicators Temperature SensorsActuators Related Equipment Siemens Building Technologies, Inc Applications Control Temperature SetpointsDay/Night Mode Night Mode Override SwitchCalibration Fan Operation Heating and Cooling SwitchoverElectric Reheat Compressor OperationFail-safe Operation Power Failure RecoveryCentralized Alarm Monitoring Overriding DOsUsing Auxiliary Points Compressor Staging Reversing Valve OperationApplication Notes Application 2583 Control Drawing Compressor/Electric Heat Staging AppIication 2584 Control Drawing Using the Controller as a Point Extension Device Application 2590 BACnet Heat Pump Slave ModeApplications Description Address Application Point DatabaseStpt Dial Wall SwitchRM Stpt MAX RM Stpt DialRmtmp Offset + Room Temp = CTL Temp Ovrd TimeNGT Ovrd Rmtmp OffsetCLG CMP2 on DAY.NGTCLG CMP1 on CLG CMP1 OFFCompressor Elec HeatHTG CMP REV ValveFAN MTR SetupDmpr POS MTR1 POSCLG P Gain Cycle FANFree CLG on Free CLG OFFHTG Loopout Rval SwitchSwitch Limit Switch TimeNGT MA CTL Switch DbandCAL Timer Error StatusPoint Database Troubleshooting Basic Service InformationPreventive Maintenance Controller LEDs Safety FeaturesGlossary Field panel Control loopEnglish units Equipment controllerLoopout Override switchSlave mode LpsUnbundle Stand-alone controlIndex BST LEDFLN PID RTS RX LEDTX LED

125-699 specifications

The Siemens 125-699 is a state-of-the-art industrial control product that showcases Siemens’ commitment to innovation and quality in automation technology. This device is specifically designed for various industrial applications, providing exceptional performance and reliability.

One of the main features of the Siemens 125-699 is its robust processing capabilities. Equipped with a high-speed processor, it can handle complex control tasks efficiently, ensuring smooth operation even under demanding conditions. This makes it suitable for a wide range of applications, from manufacturing to process automation.

The device supports multiple communication protocols, which enhances its versatility. It is compatible with popular industrial communication standards such as Profinet, Profibus, and Ethernet/IP. This flexibility allows for seamless integration into existing systems and facilitates communication between various devices on the network, making it an ideal solution for modern interconnected factories.

In terms of user interface, the Siemens 125-699 offers an intuitive design with a user-friendly programming environment. The platform supports advanced programming languages, including Ladder Logic and Structured Text, enabling engineers to develop and modify control algorithms with ease. This capability not only improves efficiency but also reduces the time needed for troubleshooting and maintenance.

Another characteristic that sets the Siemens 125-699 apart is its rugged construction. Designed for harsh industrial environments, it features a durable housing that protects against dust, moisture, and extreme temperatures. This robustness ensures longevity and reliability, even in challenging conditions, which is crucial for minimizing downtime and promoting continuous operation.

Additionally, the Siemens 125-699 incorporates advanced diagnostic tools. These tools enable real-time monitoring of the system's performance, allowing operators to detect and address potential issues before they escalate. This proactive approach to maintenance is vital in enhancing productivity and ensuring the smooth operation of industrial processes.

In conclusion, the Siemens 125-699 is a comprehensive solution for industrial automation needs. Its combination of high processing power, versatile communication options, user-friendly interface, rugged design, and advanced diagnostic capabilities makes it a leading choice for companies looking to enhance their automation systems and improve operational efficiency. With Siemens' reputation for quality and innovation, the 125-699 stands as a testament to the company's dedication to advancing industrial technology.
Top Page Image Contents