Temperature Setpoint

The Touch Point 2.0 panels have 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:

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;

SETPOINT_VALUE: allows to set an actual temperature setpoint value. After reset, the DEFAULT_SETPOINT register's value is set to the SETPOINT_VALUE register. The register contains a value multiplied by 10. The value range is 0-500 (0-50^oC);

• Modbus register: 41501;

• BACnet object: AV56, 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_VALUE register). The register contains a value multiplied by 10. In the range of 0-500 (0-50^oC), the default value is 210 (21^oC);

• 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 range of the OFFSET_SETPOINT variable is set against the OFFSET_RANGE value: if the OFFSET_RANGE value is set to X, the OFFSET_SETPOINT range is -X to X. The default value is 0 (0^oC);

• Modbus register: 41504;

• BACnet object: AV58, property: Present Value.

Above parameters are 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 default value is 180 (18^oC);

• 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 default value is 240 (24^oC);

• 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. In the range of 0-100 (0-10^oC), the default value is 30 (3^oC);

• Modbus register: 41507;

• BACnet object: AV59, property: Present Value.

User Interface Parameters for Temperature Setpoint

In Touch Point 2.0 panels, the temperature setpoint can also be configured using a touch panel (see User Interface Guide). This way, it is possible to change either the SETPOINT_VALUE or OFFSET_SETPOINT depending on the configuration of bits 1 and 2 of the SETPOINT_CONFIGURATION and the SETPOINT_STEP and EXIT_EDIT_TIME parameters:

SETPOINT_CONFIGURATION, bit 1: EDITABLE: enables or disables editing of the temperature setpoint locally from the panel;

• Modbus register: 41513;

• BACnet object: AV56, property: 4200;

SETPOINT_CONFIGURATION, bit 2: OPERATING_MODE: allows to set the operating mode of the temperature setpoint configuration;

• Modbus register: 41513;

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

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 a 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 (1^oC);

• Modbus register: 41508;

• BACnet object: AV56, property: 1507;

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.

LED Bar

The Touch Point 2.0 LED bar is comprised of three blue diodes and three red diodes. For every 0.5°C change of a selected value (depending on the LED bar mode), LED bar brightness changes by 50% of single LED point. Number and brightness of LEDs indicate exact difference of the values:

• every 0.5 degree of difference lights up a next LED half way up;

• every 1 degree of difference lights up a next LED to maximum;

• a difference greater than 3 degrees lights up all 3 LEDs and does not change further;

• changes are controlled with 0.2 degrees hysteresis to prevent LEDs flashing.

The value, which change will be illustrated on the LED bar display, is defined in the SETPOINT_LED_BAR_MODE and SETPOINT_LED_BAR_USER_VALUE variables.

SETPOINT_LED_BAR_MODE: allows to select a LED bar operation mode:

• Modbus register: 41509;

• BACnet object: MSV32, property: Present Value.

SETPOINT_LED_BAR_USER_VALUE: allows to set a value represented on the LED bar (in the range -500 to 500) if the LED bar mode is set to BMS. The register contains a value multiplied by 10;

• Modbus register: 41510;

• BACnet object: AV67, property: Present Value.