Daylight Lighting Control
The Daylight Lighting Control is a linear open-loop controller mainly consisting of an analog sensor (group) measuring the daylight, a main lamp (group) and two sub lamps/lamp groups. The linear equation for the main lamp (group) has to be entered in 2-point form: the Actual Value for a Control Value of 0% and the Actual Value for a Control Value of 100%. The sub lamp groups´ light level is calculated by the level of the main group, multiplied by amplification-factors. Because of these conditions, the three lines will always have the same zero-point. The linear equation however must be calculated. Wrong nodes and/or amplification-factors may cause the light values to run into its limits.
Here are some examples given by diagrams:
Settings
Parameters
- Latching time: Time distinguishing between short and long-click of a pushbutton.
- Switch-on delay / Switch-off delay: An additional delay switching the lamp on or off (0 ↔ min Value) can be defined by these parameters. This can be used to preserve the lamps from damage due to many switching-actions when the supposed control value moves around 0%.
- Control Value 100% when Actual Value is: First node of the linear equation.
- Control Value 0% when Actual Value is: Second node of the linear equation.
- Factor Control Value of Sub Lamp (Group) 1 / Factor Control Value of Sub Lamp (Group) 2: Amplification-factors of the sub lamps/lamp groups relating to the main lamp (group).
- Dimm Up Option: This describes what the assigned lamp (group) will do, if a short-click of Digital Signal (Group) - Dimm Up was detected.
- Dimm Down Option: This describes what the assigned lamp (group) will do, if a short-click of Digital Signal (Group) - Dimm Down was detected.
- Toggle Mode: If you use the Toggle Mode via "On / Off command of the functional unit", the lamp / lamp group toggles between the resetting value of the functional unit and "off". If you use the Toggle Mode via "On / Off command of the local value", the lamp / lamp group toggles between the resetting value(s) of the lamp(s) and "off".
Sensors / Actuators
In this menu you enter the lamp / lamp group and the digital signals for switching the correspondent lamp / lamp group.
In general there are two different procedures to control the lamp / lamp group: with two pushbuttons for dimming up and down or with one pushbutton which alternately dims up and down. A combination of both procedures is possible.
Additionally a motion detector can be used to activate the light control: a rising edge at Digital Signal (Group) - Motion Detection activates the light control, a falling edge deactivates the light control and switches it off.
Online
Commands
- Fade Up: This command will increase the light value of all assigned lamps by their entered fade-rate. The command will only work, when the lamp is already turned on. Increasing the value above the maximum level is not possible.
- Fade Down: This command decreases the light value by the entered fade-rate but will not let a lamp turn off completely.
- On: Turns the assigned lamps either to the maximum or the Resetting Value, which depends on the fact, if the Resetting Mode is activated or not. The Resetting Mode can be activated for each lamp separately.
- Off: Turns the assigned lamps off. When the Resetting Mode is activated the light value prior to the off state will be stored.
- Call Maximum Control Value: Each lamp will be turned to its maximum level.
- Call Minimum Control Value: Each lamp will be turned to its minimum level.
- Off ↔ Resetting Value: The switching direction depends on the average value of the lamp (group). If the value is greater than 0 all lamps will be turned off. When the value is equal to 0 all lamps will be either turned to their Resetting Value or to their maximum value, when the Resetting Mode is not activated at the lamp.
- Off ↔ Max Control Value: The same as Off ↔ Resetting Value but all lamps will be toggled between off and their maximum value.
- Set Control Value Direct: The entered value will be taken over to the lamps, when the Apply-button is pressed. If the entered value is greater than the maximum value of one of the lamps, the lamp will be set to its maximum level. If it is lower than its minimum level, but not 0, the lamp will be set to its minimum level. Entering and applying a 0 will turn the lamps off.
- Regulator Enable/Disable: Sets the twilight-switch in automatic/manual mode. When the PLC is started, the regulator is disabled.
All Input functions are only possible, when the regulator is disabled, except the control Enable/Disable-functions. In addition, it is possible to disable the active control and turn off the lamps with the Off-button. This functionality can be used for e.g., presentations, when a conference room must be dark. The next rising-edge of the motion detector, however, will reactivate the controller, so the delay off-time of the digital signal (group)(motion detection), has to be big enough to ensure secure presence detection over a long time.
State
- Control Value: Average value of the active (non-erroneous) lamp/lamps of of the main group.
- Control Value - Sub Lamp (Group) 1: Average control value of sub lamp (group) 1 in percentage.
- Control Value - Sub Lamp (Group) 2: Average control value of sub lamp (group) 2 in percentage.
- Actual Value: Measured light level.
- Resetting Value: When the functional unit is turned off, the previous light level will be stored in this variable. If you have selected the entry "Toggle via On/Off command of the Functional Unit" as "Toggle Mode", the lamps in the functional unit are set to this value, when they are switched on with the command Off ↔ Resetting Value.
State PLC Module
- Execution State: Shows if the module is running or stopped.
- Error: In case of an error, the error code and the error parameter are displayed in this box.
- Start/Stop: Starts/stops the module.