Omega Speaker Systems RD8300 manual Conditional Input, Gated Timer

Section 5 – Recorder Setup

5.1.3.6Conditional Input

Any of the eighteen channels can be a conditional channel. A conditional channel gets its value from a true or false test of conditions which may be based on a live channel. Setting a live input channel to be a conditional channel will disable the live input. It is recommended that the virtual channels (Channel 7 to 18 in a 6 input unit or Channels 13 to 18 in a 12 channel unit) be assigned as conditional channels.

Basically the user sets up a condition which can have two possible outcomes, one if the condition is true and another if the condition is false.

The Conditional Channel Setup dialog window
requires three inputs: the condition to be	Figure 5-8 Conditional Channel Setup
tested, the result if true, and the result if false.
See Figure 5-8.

C01 through C18 represent channels 1 to 18, some of which may be live channels. The Conditional Channel Setup window also allows up to six constants to be set and used. See constants above.

Once data has been entered, the expression needs to be tested as shown above before exiting by pressing the Exit button. In the example of Figure 5-8, Channel 13 is being programmed to indicate zero to 100 for a 4 – 20 milliamp input on Channel 1 with any input less than 4 milliamps showing zero.

5.1.3.7Gated Timer

The Gated timer Calculated point type allows a timer (measuring in seconds) to be controlled by a „gate‟ from a logic point. For example, if a point is measuring temperature and you wanted to know the total amount of time the temperature measured by this point is above or below a certain level, a Conditional point can be programmed to be TRUE only when the temperature is above or below a set level. A Gated timer point can then be programmed to be turned ON only when the Conditional point is in the TRUE state. The Gated timer point will then only be timing when the temperature is above or below a set level. The timer will continue to accumulate time (in seconds) each time it is turned on. The Gated timer point can be reset at

programmable time intervals and alarms can be

set to alarm if the timer total goes above aFigure 5-9 Gated Timer Setup programmed time interval in seconds.

The Gated Timer Setup dialog window is shown in above right. There are several options:

Auto Reset: If this box is unchecked the Timer will run continuously unless External Reset is enabled. If the Auto Reset box is checked then the timer will reset at the reset interval.

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