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Circadian curves are 24-hour cycles that a human’s body follows as part of its regular daily operation. In terms of lighting, this can mean gradually changing the colour temperature of a luminaire between warmer and cooler outputs throughout the day.
Circadian curves via the Response Portal aim to better align the lighting conditions with a human’s internal body clock. Done by enabling users to create 24-hour schedules of colour temperature and light intensity. Thereby creating a more natural environment indoors which enables alertness during the daytime and helps calm closer to sunset.
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DT8 drivers
Compatible PIC firmware version (v184 or higher)
Response Portal connected installation
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The way circadian curve works in Organic Response System is through simultaneous changes in colour temperature and light output of tunable white luminaires. When a user applies a desired curve through the portal the sensor nodes Response Portal the Response Nodes for the whole building or floor will adjust its current colour temperature & light output based upon current time of the portal Response Portal and its timezone. See some keys steps and considerations before we delve into the how we use the curve,
The curves are sent through the portal Response Portal to the nodes Response Nodes either to
the whole building or
to a whole floor or
Selected tags including tenant tags and standard tags.
When a curve is sent through the portal Response Portal it is sent to all the nodesResponse Nodes, however, it will only be implemented by the nodes Response Nodes that have the required firmware version.
The nodes Response Nodes check every minute and make adjustments according to the values on the curve.
A curve is only sent as a whole to the nodeResponse Node. The node Response Node will, based upon the time it is sent from the portalResponse Portal, calculate where it needs to be in the curve over the period of 24 hours.
Upon storing the curve received from the portal Response Portal the nodes Response Nodes will continue to follow that unless someone disables the curve or sends another curve to override the currently saved curve.
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Operational Example: As an example shown above “Standard Curve” (curve 1) will take precedence over “Floor Curve“ (curve 2). The way it will operate is as below,
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The above example can give you an insight at use cases where multiple curves are created for the same floors and building or some common areas. If there are multiple curves specified for same tags and floors the portal Response Portal will ignore all lower curves and will only apply the first curve if they are conflicting curve for same set of nodesResponse Nodes.
Please note since the higher the schedule the higher the priority if you set up a building wide schedule at the top all the lower schedule will be ignored. See the steps explained below in heading 9.10.4.5 on how to adjust the priority of a curve.
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In order to understand the process of how you can use Circardian Curves let's go through a process detailed below along with the key concepts and logics explained throughout. In order to access the circadian curve menu, first navigate to the portal Response Portal (click here to access the portalResponse Portal). If Circadian Curves have been enabled for your building and account, you will notice that a new icon is appearing in the portal Response Portal as highlighted below,
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The circadian curves are only deployed through portal Response Portal and therefore require all tunable white nodes Response Nodes to be mapped in the portal Response Portal prior to setting up curves. |
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Let's now have a look at both setting the colour temperature and max light level curves for the nodes Response Nodes separately below. Although it would be important to note that at each given hour the nodes Response Nodes will take both colour temperature and light output levels simultaneously.
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It’s important to remember that light levels from a curve can change the maximum light level that a luminaire can reach. Upon presence detection the light level that luminaire will produce will take the value which is lower out of maxlight or the light level set by curve at any particular time. A couple of example to help explain this better,
If no presence is detected under the Sensor Response Node then it will either be at minlight, or in a state of waiting to go to minlight. At any particular time upon presence detection the dim levels set by the curve is limited between the maxlight and minlight value. |
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A curve is only sent at the time of playing the curve while the nodes that have received the curve will continue to make adjustments automatically throughout the day
If you edit an active curve you will need to save it again, however, you do not need to pause and play the curve again.
Please note that when you edit an active curve and save it a pop up will appear as shown below
It is important to understand that granular schedules such as those on a floor take precedence over the building wide schedule so always remember to check the correct schedule when trying to establish the correct colour and light values.
If you wish for the nodes to stop following a curve press on the pause icon that appears as you take your mouse over the play button.
As soon as you click on pause the nodes will go back to the default operation mode based upon their configured parameters.
The nodes can stay in the last received curve for 2 hours after a disable curve command is issued from the portalResponse Portal
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It is important to note that you can’t delete a curve without pausing it first. This is so that you don’t lose the current curve sent to the nodes without first clearing it for the nodes to stop following. |
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The occupancy information sensed by the sensor nodes Response Nodes will work as it does in “auto” operation. A circadian curve based control is checked by the sensor nodes Response Nodes periodically, however, in order for the nodes to implement the nodes have to be triggered by occupancy. This is so that the sensor nodes Response Nodes can stay off or at their configured min-light output in the absence of any occupants in the space. As soon as the sensors detect occupancy they will start exhibiting the colour temperature and light output based on the current time of the day in the curve.
9.10.5.5 Manual override
If the sensor nodes Response Nodes are overridden by a manual control the sensor nodes Response Nodes will implement the control as they would in normal operating condition i.e. the newly implemented temporary control will take precedence.
As an example, if someone implements a scene on the sensor node Response Node that is supposed to follow a curve through a switch or app. The scene will be implemented immediately to the sensor nodes Response Nodes until it naturally exits a scene e.g. if in default configuration the nodes will exit the scene on absence.
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Once a curve is sent to the sensor nodes Response Nodes through the portal Response Portal the curves are actually stored on the sensor nodesResponse Nodes. However, the sensor nodes Response Nodes sends a query message every hour to the gateway to get details of the curve and the current time. Since the sensor nodes Response Nodes are not equipped with any time clock they will need to attain the time information from the gateway through this curve query. The frequency of curve is different depending upon the current state of the sensor nodesResponse Nodes,
On sensor node Response Node startup, if circadian curve is enabled the curve would be queried once every 15 minutes for an hour or until a curve is received.
If no curve is received after the first hour a query from the node would be sent every hour.
When a curve is received the node should wait 1.5 hour to query the curve and then query every hour until a curve is received. And when the curve is received it will repeat this
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Circadian Curves will only be applied to mapped Sensor Response Nodes, therefore please make sure that all mapping is completed before activating a curve. |
If a Sensor Response Node needs to be mapped to a building after a Circadian Curve has been applied, then that Node or Nodes will not receive and begin to use the intended curve. To make sure that the active curve is applied to newly mapped or re-mapped nodes, please deactivate and then activate the curve again after all mapping is completed.
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When a curve is disabled the current firmware will take up to 2 hours before the sensor node Response Node will stop following the previously configured curve changes. Which means that it will continue to follow the changes as preset by curve for up to 2 hours after the curve has been disabled before it can revert to its auto operation mode.