PDS2-H Weather Compensator with Modbus Communications

Transcription

1 Product sheet CT2.40 Type PDS2-H PDS2-H Weather Compensator with odbus Communication The PDS2-H is a weather compensator designed to control accurately heating systems. The controller calculates the required flow temperature setpoint based on the outside air temperature. This allows the heating water temperature to be adjusted according to the weather conditions outside. Room temperature sensor option can shift the supply water temperature setpoint based on the internal heat gains or losses providing improved energy efficiency and comfort. Outside ECO feature will disable automatically the pump output when the outside air temperature exceeds the ECO setpoint. The controller has built-in LCD display that indicates the current status of the controller and can be used for the controller configuration. The controller is easy to use and and has DIN-rail mounting. The built-in RS485 odbus communication allows the controller to be connected to central supervisory system such as WebBiter embedded web-server or to a BS system. odel Types odel Description PDS2-H PDS2-H Weather Compensator with odbus Communications Technical Data Power supply 24Vac/dc (20 26V), NOTE: 3-point and thermic actuators require separate AC supply. Inputs 3 x Pt1000 (WATER, OUTSIDE, ) 1 x Analogue / Digital Outputs 4 x 0..10Vdc (Control Valve, Alarm, Night (ECO), and Time Switch Outputs 4 x 24Vac Triacs, 1A maximum (3-Point or Thermic Actuator, Pump and Alarm Output) Communications RS-485 odbus RTU, 9600/19200/38400 bps, 8 data bits, Parity None, 1 Stop Bit (Up to 128 devices per segment) Internal Clock Inaccuracy max +/- 1min/year Battery Backup 1 Week (for clock) Set Point Adjustment CURVE SHIFT +/-25 C (Adjustable in the user mode) PUP ECO SP C (Adjustable in the configuration mode) POINT C (Adjustable in the configuration mode); Display Buttons Wiring Terminals Operating Humidity Protection Class INTERNAL OR EXTERNAL CURVE SHIFT COPENSATI CURVE +/-25 C (Adjustable in the configuration mode) Provides Boost / Setback using Internal Time Clock or External Contacts Compensation curve (3 or 5 points) with minimum and maximum flow temperature settings LCD Display, Automatically Rotating Display for the User Access to all configuration parameters 4 Touch Buttons for the Programming and User Configuration 1.5 mm % rh IP20 Online store: Enquiries: T: F: Copyright All rights reserved - 06/2011 PS CT2.40-1/9

2 Technical Data Cont d.. CE Approval Directive 2004/108/EY EN : 2001 (Emissions) EN : 2001 (Immunity) ounting DIN-rail ounting Overall size 53W x 90H x 58D mm APPLICATI PROFILE PDS2 controllers have two application profiles for different applications: PDS2-V and PDS2-H. PDS 2-V application profile is selected as a default. To change the application profile to PDS2-H follow the following instructions. The application profile can be selected when the supply voltage is connected to the device. 1. Press the + and - buttons simultaneously for five seconds. The device version shows on the display for five seconds. 1.1 VER 2. Press the OK button when APPL is shown on the display. APPL text starts to flash. APPL =VENT WARNING: The device returns to user mode if the buttons are not pushed during 10 seconds. 3. Select the wanted application by pushing the "+" and "-" buttons. 4. Push the OK button. The confirmation question appears on the display. APPL SURE? 5. Press the OK button to accept the application selection. NOTE: You can return to previous display without accepting the selection by pressing the button. APPLICATI DIAGRA The PDS-H controller has been designed to operate stand-alone as a heating weather compensator. The diagram below illustrates the typical application. CLOCK ODBUS COS FLTA TE2 PDS2-H TE3 SENSOR AI4 OUTSIDE SENSOR 0..10Vdc or 3-POINT or Thermic *1 TE1 BURNER WIRELESS SENSOR *1 when TE2 > SPpump. Alternatively an external time clock, PDS2-O or odbus aster can switch to NIGHT (ECO) mode. PS CT2.40-2/9

3 The controller measures the outside air temperature and calculates the effective flow setpoint using a built-in compensation curve. When the outside air temperature is colder the supply water temperature is increased and when it is warm outside the required water temperature is lowered. PDS2 COPENSATI CURVE FLOW TEPERATURE P5 P4 P5 works also as max temperature limit P3 P2 P1 P1 works also as min temperature limit OUTSIDE TEPERATURE The optional room temperature sensor will automatically compared the room temperature to the required setpoint and adjust the compensation curve upwards and downwards as required. CNECTI DIAGRA WARNING:The electrical installation, device connection and commissioning can only be carried out by qualified professionals and according to the local wiring regulations! 24 Vac/dc 0 V 1 2 G Go 24 Vac/dc Supply PDS 2-H USER DISPLAY EXTERNAL CTACTS / CLOCK BOOST/ ABCK BACK/BOOST/NIGHT 24Vac Feed Thermal odbus 3-Point Control Valve out 0-10V / 10-0V 0V Pt 1000 WATER Pt 1000 OUT Pt 1000 Alarm (0V normal 10V fault ) NIGHT (ECO) ODE 0V OUT= Pump Alarm 0V A1 Open otor out B1 Fuse Close P 1,5A Pump Relay out AL Alarm Relay out Go B- odbus A+ TE1 TE2 sensors Pt 1000 TE3 AI4 Analog Input Go AO1 AO2 AO3 AO4 SWITCH =0V = 10V PDS2-H controller auto-rotates on its display the typical measurements and the plant 'PROGRA' Key status. This display is activated after a 43.3C effsp timeout of 30 seconds. '+' and '-' Keys The controller has four (4) touchsensitive OK buttons for the user interaction (see figure). OK Key During the display rotation the rotation can be paused by pressing the "OK" key. The rotation can be re-activated by pressing the "OK" key again. By repeatedly pressing the "OK" key the required parameter can be selected. After pausing the rotation, the controller returns to the auto-rotation mode automatically after 60 seconds. PS CT2.40-3/9

4 The display rotates between the following readings: Room 21.6C Pump Output Status (0/1) ixing Valve Output (%) PU PUP OUT% 14.8C 52.6C 47.3C TE OUT WATER effsp Outside Water Flow HI L75 C High Limit Active (at temperature) Calculated Flow Setpoint OPTIAL DISPLAYS (SPECIAL CDITIS AUTOATICALLY ADDED TO THE ROTATI): LI L22 C Low Limit Active (at temperature) ERR TE OUT Outside Sensor Error ERR Room Sensor Error ERR WATER Water Sensor Error Optional displays provide additional information in abnormal conditions e.g Flow High Limit is active or a sensor has been disconnected. USER TINGS By pressing the "PROGRA key the user can adjust the heating compensation curve upwards or downwards (+/-25 C). Press PROGRA key to display the current CURVE SHIFT setting. Press + and - keys to shift the compensation curve vertically upwards or downwards. Once the required setting is found press OK to accept the new setting. The controller returns to the normal user display. Curve Shift Setting (+ or -) 5.0C SP 43C Effective Calculated Flow Setpoint Note: The effective calculated setpoint is automatically updated as and when the curve shift setting is changed. PDS2 COPENSATI CURVE ax Flow 80 FLOW TEPERATURE 20 Curve Shift Parameter (+ or -) OUTSIDE TEPERATURE in Flow PROGRAING ODE To enter programming mode, press the following OK OK Cur CURVE OK The 'CURVE' menu selection is displayed on the screen. Press to enter to 'CURVE' (Compensation Curve) menu. The controller is operational without need for any programming. The controller expects to see flow and outside air temperature sensors. If a room temperature sensor is connected, this needs to be enabled in the input menu. The controller compensation curve, 3-point actuator running time, the room setpoint etc. can be adjusted to meet the site requirement by entering to the programming mode. To enter prgramming mode press the following keys +, OK, OK and. PS CT2.40-4/9

5 ENU STRUCTURE TOP LEVEL ENU CUR CURVE Press '' Compensation Curve enu Required (inimum) Flow Setpoint. Press '+' or '-' to adjust. Press to OK' enter 2 P1 20C Point P1 of the compensation curve. Point P2 35.0C P2 15C Outside Press '' and '+' or '-' to adjust, to accept. Press '+' or '-' to adjust. OK' Point P3 5 P3 10C OK' Point P4 65.0C P4 5C OK' Press to continue Required (aximum) Flow Setpoint. Point P5 8 P5 0C C CTR Control Parameters enu Press 50.0 XP C Proportional Band [1..200] =PI SEL Tint s Control ode [P/PI] Integral Action Time [ s] 3-P [1=Thermic Actuator, 2=3-Point Actuator] Press '' 180 Tmot s AO1=DIR Actuator Running AO1 Operation Time [ s] [DIR = direct, REV = reverse] On PUP Pump Output [ =Enabled, =Disabled] 2 PU_SP Outside Eco Setpoint for Pump (pump off when TE2 > PU-SP) 1 OD= odbus Address [1..247] 9.6 kbaud odbus Baud Rate [9.6/19.2/38.4] INP INPUT easurement Input enu A A1 2 WATER TE1 Settings FLT % AO1 Output in CAL Sensor Calibration OUT TE2 Settings Case of Sensor [-2..+2] Fault [0..100] CAL Sensor Calibration [-2..+2] Press '' A1 3 TE3 Settings 21.0C 4 SEL C RATIO Room Sensor [//AI4] Room Setpoint [17..30] Room Influence Ratio [-6..+6] 18.0C ECOSP CAL Night ECO mode Sensor Calibration Setpoint [0..50] [-2..+2] A1 4 INPUT AI4 INPUT mode Selection (no adjustment) ODE ODE If, PDS2 uses If, PDS2 uses AI4 (term 13) to override Internal Clock to override mode to ECO (Night) or mode to ECO (Night) or to a Curve Shift Setting to a Curve Shift Setting (Boost/Setback) (Boost/Setback) Curve Shift (+/-25 C) Activated when AI4 ode = and AI4 (term 13) is connected to 0V Press '' CL0 Set enu X Set Hours 12.XX Set inutes CL1 Time Hours Time inutes Time Hours Time inutes ECO/CUR ODE/SHIFT INTERNAL control selection. ECO (Night) or Curve Shift ode DEFAULT = CURVE Curve Shift (+/-25 C) If CUR selected and AI4 ODE = RE CTROL PDS2-H controller has room reset control feature (if AI3 room sensor input has been enabled). This function will automatically adjust the water flow temperature according to the space conditions. To activate this function connect TEHR-PT1000 sensor or wireless room sensor via FLTA receiver to the PDS2-controller input AI3 (terminal 12). PS CT2.40-5/9

6 WIRELESS SENSOR A1 3 TE3 Settings 21.0C 4 SEL C RATIO Enable Room Sensor [ = Enabled AI4 = Wireless Room Sensor via AI4] Room Setpoint [17..30] Room Influence Ratio [-6..+6]. E.g. with setting 4, one degree change in the room temperature equals four degrees change in the flow setpoint. If required, PDS2 controller can be connected to a wireless room sensor via FLTA receiver. The diagram below illustrates the configuration. The wireless room sensor is activated from the AI3 menu by selecting the AI4 option. The FLTA output is then connected to the AI4 input of the PDS2 controller (terminal 13). ODBUS COS FLTA TEFL PDS2-H AI4 AO1 [0..10V] WIRELESS SENSOR AI3 INPUT CFIGURATI A1 3 TE3 Settings =AI4 SEL Room Sensor [AI4 = use input AI4 for the room sensor) If the AI4 voltage drops below 2V, the controller will consider this as a sensor fault Vdc input signal equal to C room temperature. NOTE: If wireless room sensor is used with the PDS2-H, the external clock input (boost/setback) is disabled. ANALOGUE INPUT4 OVERRIDE CDITIS (BOOST / BACK / NIGHT [ECO] ) If the PDS2 controller AI4 external input mode is enabled (= internal clock disabled) the controller monitors the Analogue Input AI4 (Terminal 13) for override conditions. A1 4 INPUT AI4 INPUT mode Selection ODE If, PDS2 uses AI4 (term 13) to override mode to ECO (Night) or to a Curve Shift Setting (Boost/Setback) Curve Shift (+/-25 C) Activated when AI4 ode = and AI4 (term 13) is connected to 0V NORAL OPERATI AI4 OPEN = The controller is in normal Operation (valve modulating, pump output running if enabled, and the effective setpoint calculated based on the outside air temperature). BACK/BOOST AI4 connected to 0V = The controller is in CURVE shift mode (boost or setback, +/-25 C). When AI4 is connected to 0V the controller effective setpoint is shifted upwards (boost) or downwards (setback), otherwise the operation is as in the normal mode. NIGHT (ECO) ODE NOTE: This override is only active if the room sensor has been activated (AI3) and a room sensor has been installed. AI4 connected to AO3 Terminal = Night Energy Saving (ECO) mode. The controller is (valve closed and pump output off), unless the room temperature drops below night frost setpoint - see Night (ECO) ode paragraph for further details. NOTE: Night (ECO) ode override is only available if a room sensor has been connected to input AI3 and the input has been enabled. BOOST / BACK USING INTERNAL CLOCK (AI4 DISABLED) If AI4 input mode has been disabled, the controller can be switched to Boost or Setback (shifting the compensation curve) using the internal time schedule, or the controller can be overdriven to Night ECO ode by the internal time schedule. PS CT2.40-6/9

7 To activate the internal clock based mode selection, set AI4 to mode and set the system time, and the switching times (one on/off period available). NOTE: If AI4 has been set to follow internal clock, the external override input (terminal 13) is disabled. A1 4 INPUT AI4 INPUT mode Selection ODE If, PDS2 uses Internal Clock to override mode to ECO (Night) or to a Curve Shift Setting (Boost/Setback) Time Hours Time inutes Time Hours Time inutes ECO/CUR ODE/SHIFT INTERNAL control selection. ECO (Night) or Curve Shift ode DEFAULT = CURVE Curve Shift (+/-25 C) If CUR selected and AI4 ODE = PUP OUTPUT NIGHT (ECO) ODE The optional pump output is normally on. The pump output switches off when the outside air temperature exceeds the PU_SP Pump Economy setpoint. If the controller is overridden to Night (ECO) ode via input AI4, the pump output switches off unless the temperature falls below the Night (ECOSP) setpoint set in the AI3 menu. If the controller is overridden to Night (ECO) mode via an external contact or an internal time clock, the controller switches the pump output off and closes the heating valve outputs. If the room temperature drops below Night (ECO)SP Frost setpoint, the controller returns to the normal day mode until the room temperature exceeds ECOSP + 2 C. Room [ C] ECOSP ECO ECO Time Hysteresis [2 C] COISSIING CLOCK The PDS2 factory default application is a standard compensator with the outside and flow temperature sensors. Typical settings to modify during the installation are:- select the actuator type and set the actuator running time correctly in the control menu (not required for the 0..10Vdc control actuators) set the 5-point compensation curve (default curve is 20/80 C) in the curve menu if the room influence is required enable the room sensor in the input menu and set the room setpoint and room correction ratio If no overrides are present, the controller operates in a normal (24/7) mode. It is possible to configure the controller to use internal time clock or external AI(4) input to override the controller to Night ECO mode or to shift the compensation curve (boost or setback). The clock is set as follows CLO --: Hours flash. Set the hours by + and - buttons. inutes flash. Set the minutes by + and - buttons. Press OK to accept and return to menu. PS CT2.40-7/9

8 The clock is disbaled by removing the time and replacing it by "--:--". By disabling the clock the time display is removed from the user display (rotating display) and the menu to set the switching times is hidden. CLO 12:30 Hours is reset to zero first After resetting the hours, the lines are set by pressing - key. Once completed press OK. TING SWITCHING S NETWORK DIAGRAS Once the clock has been set, switching times menu is displayed on the controller configuration level. When the clock is activated (), the AO4 = 10V and when the clock is AO4 = 0V. CL1 Time Switch enu Time Hours Time inutes Time Hours Time inutes back to menu Up to 128 PDS2 controllers can be connected to a single network segment. The diagrams below illustrate the typical installation options. It possible to connect the controllers to an existing BS (e.g. to TREND BS) via a odbus gateway. Please contact SyxthSense for more information. Or the controllers can be connected to the WebBiter embedded web-server that provides BS front-end capability and access via a standard web-browser. Web-Browser WebBiter Ethernet (TCP/IP Network) odbus RTU (RS-485) PDS2-H Weather Compensator PDS2-V Ventilation Controller HLS34 Room Controller ODBUS REGISTERS (PDS2 Version 1.1) The controller supports the following odbus registers and function codes. The default communication speed is 9600 bps, 8 data bits, Parity None and 1 Stop Bit. Please note that odbus register space is specified from the odbus master perspective as in the odbus Application Protocol specification. The odbus registers for Function Codes 02, 03, 06 and 16 have presentation for both odbus "address blocks" and for actual odbus register offsets. For example, the 1 is read from odbus register 9 using Function Code 04. Some odbus masters will require Function Code 04, register 9 to be entered, whereas the others will require register and Function Code 04. The actual message string will always be sent as a stripped register value of 9 but the data entered to the odbus master depends on the implementation of the master. Register Parameter Description Data Type Raw Data Range FUNCTI CODE 01 - READ COILS 2 CurveShift Setting ode by odbus Bit 0 On - Off 3 Night (ECO) by odbus Bit 1 On - Off 4 Overdrive ode Enable Bit 2 On - Off 5 odbus Setpoint Enable Bit 3 On - Off PS CT2.40-8/9

9 Register Parameter Description Data Type Raw Data Range 6 Alarm Bit 4 On - Off FUNCTI CODE 02 - READ DISCRETE INPUTS CurveShift Setting ode Asked by PDS2 Bit 0 On - Off Night (ECO) by PDS2 Bit 1 On - Off CurveShift Setting ode Active Bit 2 On - Off ECO Active Bit 3 On - Off Pump Bit 4 On - Off FUNCTI CODE 03 - READ HOLDING REGISTERS Overdrive Value Signed % Set Point by odbus Signed C odbus CurveShiftSetting (Boost/Setback) Signed C in inutes Signed or in inutes Signed or (see Note 1) Timechannel hh:mm hh:mm (see note 1) FUNCTI CODE 04 - READ INPUT REGISTERS Overdrive Value Signed % Set Point by odbus Signed C odbus CurveShiftSetting (Boost/Setback) Signed C in inutes Signed or in inutes Signed or TE1 Signed C TE2 Signed C TE3 Signed C Analogue Input 4 Signed Volt Effective Setpoint Signed C Potentiometer Signed C Output Signed % FUNCTI CODE 05 - WRITE SINGLE COIL 2 CurveShift Setting ode by odbus Bit 0 On - Off 3 Night (ECO) by odbus Bit 1 On - Off 4 Overdrive ode Enable Bit 2 On - Off 5 odbus Setpoint Enable Bit 3 On - Off 6 Alarm Bit 4 On - Off FUNCTI CODE 06 - WRITE SINGLE REGISTER Overdrive Value Signed % Set Point by odbus Signed C odbus CurveShiftSetting (Boost/Setback) Signed C in inutes Signed or in inutes Signed or FUNCTI CODE 16 - WRITE ULTIPLE REGISTER Overdrive Value Signed % Set Point by odbus Signed C odbus CurveShiftSetting (Boost/Setback) Signed C (see Note 1) Timechannel hh:mm hh:mm (see note 1) Note 1. Register 1793 returns registers 6 and 7 as 4-byte value (Timechannel format). To remove the times write "--:-- : --:--" = (0xFFFF 0xFFFF) to register PS CT2.40-9/9