Cattron EliteIQ, Руководство пользователя

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EliteIQ
TM
User Manual
54
9M02-7100-A001-EN
Version B
Item Description
Alarm State
When a sensor’s value exceeds a Low or High Limit, the channel goes into an
Alarm State. When these transitions occur, Relay Lists can be controlled. Specify
what condition you want the relay to assume when these transitions occur, as
follows:
0 – De-energized
1 – Energized
2 – No change (disabled)
Alarm Types Input alarms are generated from either Digital Inputs or Analog Inputs.
The Digital Inputs have three types of alarms:
•
Contact closure (or open)
•
Totalizer (counting pulses)
•
Duration (total time in a condition)
The Analog Inputs have four types of alarms:
•
High Limit
•
Low limit
•
Positive rate of change
•
Negative rate of change
Each of these alarms is independent of the other.
Amber LED Channels LEDs can be amber, which indicates that the input is in the Low Alarm
region.
Blinking indicates in alarm and not acknowledged. Solid indicates in alarm and
acknowledged.
(Available on EliteIQ controllers only).
Analog Input Analog inputs are voltage or current inputs that vary over a predefined range,
typically 4-20 mA or 1-5 V. These signals are connected to Analog Input cards
and programmed to provide values in engineering units.
EliteIQ operates on analog inputs in engineering units, not counts. Since you are
measuring in engineering units, this makes it easier to specify the alarm limits that
you use. You specify the conversion from current (mA) or voltage (V) to
engineering units using the Decimal Position, Zero Scale, Full Scale and
Engineering Units under the Channel Conversion.
Use the Zero to specify the Engineering Unit value at the lowest input signal being
monitored. The Full Scale is the range of the input signal in Engineering Unit
value. The Digits to the right of the decimal is used to specify the precision of all
the limits, zero and span. The Zero Sign specifies whether the zero value is
negative or positive.
If the Engineering Unit is set to gpm (gallons per minute) or gph (gallons per hour),
the EliteIQ automatically computes a totalized flow. The totalized flow is displayed
on the View channel screen and on Status reports. The totalized flow will continue
to increase until the counter is reset using the Reset Counter function.