Control Techniques Epsilon EP-P, Reference Manual

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Epsilon EP-P Drive Reference Manual
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Revision A4 www.controltechniques.com
The number of Timers in the configuration can only be modified while offline.
Timer Name
The user can assign a descriptive name to each Timer, making the configuration easier to follow. The length of the text string
is limited by the column width, with a maximum of 12 characters. Spaces are not allowed in the name, but underscores are.
Simply click on the name field to modify the individual Timer Name.
Timer Type
There are several types of Timers available that help you to achieve different tasks. Use the combobox in the Type column to
change the individual Timer Type. The Enable is not shown in the diagrams below. Assume in all cases the TimerEnable is
ON. Select from these Types:
Edge ON Timer
With this type of timer, when the input of the timer activates, the internal clock begins to count. When the Preset time is
reached, the Output of the timer turns ON.
In the case of the Edge type timer, once the rising-edge occurs on the Input, it doesn't matter what happens to the state of the
Input after that. The Output will always turn ON when the Preset Time is reached (unless the Reset activates before the Preset
Time is reached). The Timer Output will remain ON until the Reset is activated or the TimerEnable is deactivated.
Figure 67: Edge On Timer - Timing Diagram
Level ON Timer
With this type of timer, when the Input of the timer activates, the internal clock begins to count. When the Preset time is
reached, the output of the timer turns ON. If the Input of the timer turns OFF before the output turns ON, then the internal clock
stops counting and the output will not turn ON. The whole sequence begins again the next time the Input turns ON. This
means that the Input must remain ON for the duration of the Preset Time in order for the Output to turn ON.
The Level On Timer does not use the Reset, but rather, the Output will remain ON as long as the Input remains ON. When the
Input turns OFF, the Output will automatically turn OFF.
Figure 68: Level On Timer - Timing Diagram
Edge OFF Timer
With this type of timer, when the Input of the timer activates, the Output turns ON automatically. When the Input turns OFF, the
internal clock begins to count. Once the Preset time is reached, the Output of the timer turns OFF. As soon as the Input turns
OFF, it does not matter what happens to the state of the Input, the Output will turn OFF when the Preset time is reached. The