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Last modified by Alexander Mott on 2024/01/05 18:55
From version 31.2
edited by Alexander Mott
on 2022/09/19 18:46
Change comment: Update document after refactoring.
To version 33.1
edited by Scott Kohlmann
on 2023/04/21 14:20
Change comment: There is no comment for this version

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1 -XWiki.alexander\.mott@chiefintegrations\.com
1 +XWiki.scott\.kohlmann@chiefintegrations\.com
Content
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4 4  (((
5 5  Phase dimming is one of the most common dimming methods for LED fixtures. The term "phase dimming" actually encompasses several dimming technologies which all operate on the same basic principal of chopping up the AC voltage being delivered to the fixtures or drivers.
6 6  
7 -Phase dimming can be broadly divided into two categories: forward phase dimming and reverse phase dimming. Forward phase dimming operates by cutting off the front (leading edge) of the AC sine wave, while reverse phase dimming cuts off the back (trailing edge) of the AC sine wave. See the [[real world data>>SHOWRUNNER™ Setup Guide.Troubleshooting Guide.Wiring and Hardware.Phase Dimming Troubleshooting.WebHome||anchor="HRealWorldPhaseDimmingData"]] below for an illustration.
7 +Phase dimming can be broadly divided into two categories: forward phase dimming and reverse phase dimming. Forward phase dimming operates by cutting off the front (leading edge) of the AC sine wave, while reverse phase dimming cuts off the back (trailing edge) of the AC sine wave. See the [[real world data>>WebHome||anchor="HRealWorldPhaseDimmingData"]] below for an illustration.
8 8  
9 9  In the event that phase dimming fixtures are exhibiting unexpected dimming behavior, an easy place to begin troubleshooting is at the lighting control module.
10 10  
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16 16  1. Disconnect the switch leg to the fixture
17 17  1. Connect a multimeter to the switch leg output of the module
18 18  1. Measure the V AC output at various brightness levels
19 -1*. If the system has been partially or fully commissioned, it may be possible to use the showrunner™ UI to adjust the brightness
19 +1*. If the system has been partially or fully commissioned, it may be possible to use the ShowRunnerCLC™ UI to adjust the brightness
20 20  1*. Alternatively, some modules have physical buttons that can be used to adjust their brightness:
21 21  1**. Press the button to toggle the output on or off. A small LED light on the module will indicate current output on/off status.
22 22  1**. Once the output is on, press and hold the button to cycle dim the output (first press and hold will lower the output, subsequent press and holds will toggle between raising and lowering the output)
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58 58  
59 59  On the front of 0-10V CLX modules are eight LEDs corresponding to each of the eight outputs. Above these LEDs are two buttons which can be used to toggle each output individually, view the current dimming mode, and switch the dimming mode for each output. There is no way to dim individual outputs from the module; the system must be at least partially commissioned with a functioning processor in order to verify dimming functionality.
60 60  
61 -See //[[Figure 1>>SHOWRUNNER™ Setup Guide.Troubleshooting Guide.Wiring and Hardware.Phase Dimming Troubleshooting.WebHome||anchor="HFigure1"]]// for details.
61 +See //[[Figure 1>>WebHome||anchor="HFigure1"]]// for details.
62 62  
63 63  == GL-EXP-DIMU-CN ==
64 64  
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72 72  
73 73  The ON/OFF button sits proud of the module cover, so care must be taken when replacing the cover to avoid damaging the button.
74 74  
75 -See //[[Figure 2>>SHOWRUNNER™ Setup Guide.Troubleshooting Guide.Wiring and Hardware.Phase Dimming Troubleshooting.WebHome||anchor="HFigure2"]]// for details.
75 +See //[[Figure 2>>WebHome||anchor="HFigure2"]]// for details.
76 76  
77 77  == DIN-1DIMU4 ==
78 78  
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80 80  
81 81  Each DIN-1DIMU4 module has four dimming outputs which all share a common line input. Each output has an LED to indicate current output status (on or off) and a button that can be used to toggle the output. Press this button once to turn the load on or off, and then press and hold this button to raise or lower the output. While dimming, the output percentage is indicated on the LCD screen on the module. Above the toggle button and load indicator LED, each output also has LEDs to indicate current phase dimming mode. Available phase dimming modes are: forced forward, forced reverse, auto-detect, and non-dim (switched). When in auto-detect mode, the "Auto" LED will be lit alongside either the "FWD" or "REV" LED to indicate which type of dimming has been detected. Below the phase mode LEDs is a recessed button which can be pressed to cycle between available phase dimming modes.
82 82  
83 -See //[[Figure 3>>SHOWRUNNER™ Setup Guide.Troubleshooting Guide.Wiring and Hardware.Phase Dimming Troubleshooting.WebHome||anchor="HFigure3"]]// for details.
83 +See //[[Figure 3>>WebHome||anchor="HFigure3"]]// for details.
84 84  
85 85  = Real World Phase Dimming Data =
86 86