Yokogawa PC-Based MX100 Bedienungsanleitung PDF herunterladen (Seite 70)

2-56

IM MX180-01E

Alarm Hysteresis

You can set a width (hysteresis) to the values used to activate and release alarms.

Alarm hysteresis prevents frequent activation and release of alarms when the measured/

computed value is unstable around the alarm value.

Alarm value

Alarm reset

Alarm occurrence

Upper limit alarm

Lower limit alarm

Measured value

or computed value

Alarm reset

Hysteresis

Alarm value

Alarm occurrence

Measured value

or computed value

Alarm Indication on the Numerical Display

Four alarm signals are displayed above the value (see the figure below). The changes in

the color of these alarm signals indicate the alarm status.

Alarm 1 status

Alarm 2 status

Alarm 3 status

Alarm 4 status

Black: Alarm not set

Green: Alarm OFF

Red: Alarm occurrence

Note

When using computation channel alarms, do not disconnect the MX100 and the PC software.

Computation channel alarms will not occur because the computation function does not work

when using only the MX100.

2.9 Setting Alarms and Alarm Indications

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Yokogawa PC-Based MX100 Bedienungsanleitung Seite 70