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Temperature Setpoint

Warning!

This section applies to all Control Point series: the Control Point and Control Point VAV.

The Control Point panel has a feature of setting a temperature setpoint and sending it through communication protocols to any temperature control device. The temperature setpoint value is configurable through the following parameters or in the iSMA Configurator:

SETPOINT: allows to set an actual temperature setpoint value. After reset, the DEFAULT_SETPOINT register's value is set to the SETPOINT register. The register contains a value multiplied by 10. The value range is 0-2120 (0-212oC), the default setpoint is 21oC;

  • Modbus register: 41501;

  • BACnet object: AV56, property: Present Value;

EFFECTIVE_SETPOINT: indicates a sum of the temperature actual setpoint value and offset. The register contains a value multiplied by 10;

  • Modbus register: 41502;

  • BACnet object: AI3, property: Present Value;

DEFAULT_SETPOINT: contains a temperature default setpoint value. The default setpoint is set as a setpoint value after the panel's restart or power supply reconnection (the value of the DEFAULT_SETPOINT register is written to the SETPOINT register). The register contains a value multiplied by 10. The value range is 0-2120 (0-212oC), the default value is 210 (21oC);

  • Modbus register: 41503;

  • BACnet object: AV57, property: Present Value;

OFFSET_SETPOINT: allows to set an offset value to the temperature setpoint (correction to the setpoint's value). The register contains a value multiplied by 10. The value range is -2120-2120 (-212-212oC), the default value is 0 (0oC);

  • Modbus register: 41504;

  • BACnet object: AV58, property: Present Value.

Above parameters can be limited to certain values stored in the following parameters:

SETPOINT_LOW_LIMIT: allows to set a minimum temperature setpoint value, which can be set by user. The register contains a value multiplied by 10. The value range is 0-2120 (0-212oC), the default value is 180 (18oC);

  • Modbus register: 41505;

  • BACnet object: AV56, property: Low Limit;

SETPOINT_HIGH_LIMIT: allows to set a maximum temperature setpoint value, which can be set by user. The register contains a value multiplied by 10. The value range is 0-2120 (0-212oC), the default value is 240 (24oC);

  • Modbus register: 41506;

  • BACnet object: AV56, property: High Limit;

OFFSET_RANGE: allows to set a limit for temperature offset value. The register contains a value multiplied by 10. The value range is 0-2120 (0-212oC), the default value is 30 (3oC);

  • Modbus register: 41507;

  • BACnet object: AV59, property: Present Value.

Configuration of Temperature Setpoint

SETPOINT_CONFIGURATION: allows to configure the temperature setpoint with in six aspects:

  • SETPOINT_VISIBILITY: enables or disables the temperature setpoint to be visible on the panel's display in the main menu;

    • Modbus register: 41513, bit 0;

    • BACnet object: AV56, property: Out Of Service;

  • SETPOINT_EDITION: enables or disables editing of the temperature setpoint locally from the panel in the main menu;

    • Modbus register: 41513, bit 1;

    • BACnet object: AV56, property: 4200;

  • OPERATING_MODE: allows to set the operating mode of the temperature setpoint configuration;

    • Modbus register: 41513, bit 2;

    • BACnet object: BO55, property: Out Of Service;

  • SETPOINT_DISPLAY: allows to configure the temperature setpoint display;

    • Modbus register: 41513, bit 3;

    • BACnet object: BO56, property: Out Of Service;

  • THIRD_POINT_ACTIVE: enables or disables decimal values in the temperature setpoint;

    • Modbus register: 41513, bit 4;

    • BACnet object: AV56, property: 4202;

  • FAST_EDIT_MODE: allows to select between a setpoint normal edit mode and fast edit mode;

    • Modbus register: 41513, bit 5;

    • BACnet object: BO57.4

Normal edit mode

If the bit 5 is false, the normal edit mode is active. The setpoint can be changed by the arrow buttons. The newly chosen setpoint has to be confirmed by pressing the occupancy/OK button. Confirmation of entering the new setpoint is signalized by double blink of the new setpoint and double buzzer signal (if enabled in the DEVICE_CONFIGURATION register, bit 0).

If the setpoint change is complete, the main menu is displayed. Pressing the fan/menu button, before confirming the new setpoint, cancels the new setpoint setting procedure, and the user returns to the main menu. If the new setpoint is not confirmed during time value stored in the EXIT_EDIT_TIME register, setting this new setpoint has failed, and the main menu is displayed.

Fast edit mode

If the bit 5 is true, the fast edit mode is active, and setting the new setpoint does not need a confirmation. The new setpoint is selected by pressing the occupancy/OK button. Pressing any other button confirms the setpoint choice. The same situation is when time value in the EXIT_EDIT_TIME register elapses. The newly chosen setpoint is confirmed. Confirmation of the new setpoint is signalized by double blink of the new setpoint name and double buzzer signal (if enabled in the DEVICE_CONFIGURATION register, bit 0). Once the setpoint selection procedure is complete, the main menu is displayed.

Bit

Name

0

1

0

Visible

Not visible

Visible (default)

1

Editable

Not editable

Editable (default)

2

Operating mode

Changing offset

Changing setpoint (default)

3

Setpoint display

Show/change offset (OFFSET_SETPOINT value)

Show/change effective setpoint (EFFECTIVE_SETPOINT value)

4

ThirdPointActive

No decimal

Decimal (default)

5

Fast edit mode

Normal edit mode

Fast edit mode

Temperature setpoint configuration

SETPOINT_NAME: allows to set a unique 4-letter name for a temperature setpoint;

  • Modbus registers: 41511, 41512 (each for two letters of the name);

  • BACnet object: AV56, property: Description Property;

OFFSET_NAME: allows to set a unique 4-letter name for a temperature setpoint offset;

  • Modbus registers: 41509, 41510 (each for two letters of the name);

  • BACnet object: AV58, property: Description Property;

SETPOINT_STEP: allows to set a temperature's setpoint step value. If the setpoint is changed locally from the panel (using -/+ buttons), a single press of a button causes a setpoint change with the step value stored in this register. The setpoint can be changed in the range determined by setpoint limits stored in the SETPOINT_LOW_LIMIT and SETPOINT_HIGH_LIMIT parameters.

The setpoint's step value is also automatically adjusted to the setpoint display precision. If the bit 4 of the SETPOINT_CONFIGURATION register is true, the setpoint value is displayed with one decimal place. In such case, the setpoint's step value is also adjusted to one decimal place. The register contains a value multiplied by 10. The default value is 10 (1oC);

  • Modbus register: 41508

  • BACnet object: AV56, property: 4206;

EXIT_EDIT_TIME: allows to set the time after which edition of any editable parameter is finished. The parameter is set in seconds. The default value is set to 5 seconds;

  • Modbus register: 40224

  • BACnet object: AO17, property: Present Value.

How to Change the Temperature Setpoint on the Front Panel?

  • Press a + or - button to enter an edit mode (display should start blinking with a current value);

  • Change the temperature setpoint value by steps set in the SETPOINT_STEP:

    • - button decreases the value;

    • + button increases the value.

  • Increasing or decreasing the value will be impossible after reaching limits set in the SETPOINT_LOW_LIMIT and SETPOINT_HIGH_LIMIT parameters.

  • To save a new value, press the occupancy/confirmation button.

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