| ** The unit has an inbuilt time limit for the on time of the actuator fixed at approximately 2.5 minutes.This is to ensure that if the actuator fails to move the panel to the required target angle for more than2.5 minutes, the unit turns off the actuator load to preserve battery life and indicates mech failure for3 seconds on the LCD display before skipping to the next target angle. | Tracker: | | The single axis tracker is based on an internal dynamic calculation of the solar sunrise andsunset time using the current realtime and date from its inbuilt RTC. After this data is achieved, it calculates the target angle of the panel and controls the actuator load to achieve this angle.This control action is repeated for every specific time interval from sunrise to sunset. Note thatthis unit does not depend on the time the actuator is ON but instead tends to turn the panel tothe correct angle. This ensures that even if there is any deviation of the panel angle at any pointof time due to external intervention OR through the manual mode of the unit, the unit willrecover the panel automatically in the next control cycle. The LCD display shows the variousimportant parameters like Time, Date, Target angle/Target time, etc.( discussed in the nextsection). The unit also provides setting of various parameters to the user through four keys onthe front panel thus making the unit extremely flexible and can be adapted by theuser for different environments much easily. | | | Charger : | | The inbuilt charger in the tracker unit is based on a three stage charging protocol whichinvolves a boost stage, a equilisation stage and finally after the battery is completely charged, atrickle charge stage. If the battery is detected to fall below a low battery threshold, the outputto the tracker load (actuator) is automatically disconnected and if sufficient PV voltage ispresent the boost charge stage is initiated. This quickly replenishes the energy to the batterywithout overcharging it by continuously monitoring the charging voltage and current to thebattery. The equalization stage is introduced to give the battery sufficient energy after thepeak voltage is achieved. Here the charging current is monitored until it drops to 0.01C of thebattery. Now the battery is fully charged and the trickle stage is initiated. This ensures that thebattery is continuously kept in a charged state and internal losses are compensated. | | | Programming modes of the unit : | | 1. Normal Mode: (Read only) : | | This is the default display mode of the unit on power ON. It scrolls the following sets ofimportant data to the user to confirm the proper functioning of the unit.a. Real time and present angle for 22 seconds.b. Sunrise and sunset time for 5 seconds.c. Next target angle and time for 5 secondsd. Load current and current date for 5 seconds.e. Back to a. | | | 2. Manual mode: | | To enter this mode, press and hold SHIFT key for 8 9 seconds. The display will initially showManual mode entering for 2 seconds and then continuously show the actual angle of thepanel in the bottom row. Now the user can manually inch the panel in the forward OR reversedirection by pressing the INC and DEC key respectively. To exit this mode, just press and holdSHF key again for 34 seconds until the message manual mode exiting pops on the display.This mode is recommended only during installation or general troubleshooting of themechanical structure of the panel and unit should be exited to the normal mode once work isover. | | | 3. Program mode: | | This mode is used for setting the various system parameters of the unit like time, date, timeinterval, etc.To enter this mode, press and hold SET key for 34 seconds. To change the parameters, use theSHF key to move highlight (blinking)within the parameter and then to increment /decrementthe value of the blinking value, press INC and DEC key . To save the present parameter andmove to the next parameter just press momentarily the SET key again. The various parametersand their functions are as below:a. set the date: This is the current date of the unit in ddmmyyyy formatb. set PV threshold : This parameter determines the minimum PV voltage input required toTurn on the panel control action during daytime **.c. current limit: This determines the maximum current limit that can be sourced to theActuator during movement of the panel. If this limit is exceeded, thenthe unit will automatically turn off the output to the load.d. time interval: This determines the periodic time interval in minutes during daytimewhen the unit recalculates the next target angle/ target time and tendsPage 3 of 3to bring the panel to the present required angle. This parameterincrements in steps of 5 minutes from 15 minutes to 90 minutes max.e. set the time: set the real time in hh:mm:ss format.To come out of the Program mode, press and hold SET key again for 34 seconds. The unitwill revert back to the normal mode. | | | 4. Installation mode: | | This mode is required for calibrating the start position and end position of the panel in syncwith the unit. This ensures that the target angle to be achieved will not cross this limits whilecontrolling the panel. To enter this mode, follow the following procedure:Press and hold INC key for more than 10 secondsThe display will show calibration mode on the display for 23seconds and then show set start angle and actual angle on the display. Now inch thepanel to the start position (stow position)using the INC and DEC key and press SHF keyto accept the start angle. A confirmation will be momentarily displayed start angleaccepted! on the display and the display will now show set end angle. Again movethe panel to the required end angle using INC and DEC keys and press SET key to acceptthe end angle. A confirmation end angle accepted! will be displayed momentarilybefore the unit reverts back to the normal mode.Note that this mode is required only once during installation of the panel on site andneed not be set again. The start /end angle setting ensures that the actuator is notpushed to its extreme ends. | |
Vasai, Mumbai, Maharashtra 