Instruction Manual

i.LON 100 Internet Server Programmer’s Reference

Property Description

Specifies the time period to wait after the condition that caused an alarm

has returned to normal status before the alarm will be cleared. You must

use the following format for this property:

DAYS HOURS:MINUTES:SECONDS.MILLISECONDS

For example, 0 6:22:12.333 indicates a time period of 6 hours, 22 minutes

and 12.333 seconds. The maximum value you can enter is:

0 1:59:59.999

The default value is:

0 00:00:00.000

Enter a scalar value for each of these properties. These values will be used

as the offset limits for the Alarm Generator when the

<UCPTcompFunction> property is set to FN_LIMIT. In this case, alarms

will be generated when any of the following conditions are true:

• Value of Input Data Point> Value of Compare Data Point +highLimit1Offset

• Value of Input Data Point > Value of Compare Data Point +highLimit2Offset

• Value of Input Data Point < Value of Compare Data Point – lowLimit1Offset

• Value of Input Data Point < Value of Compare Data Point – lowLimit2Offset

The value entered for <UCPThighLimit2Offset> must be greater than that

entered for <UCPThighLimit1Offset>, and the value entered for

<UCPTlowLimit2Offset> must be less than that entered for

<UCPTlowLimit1Offset>. The default value for each property is 0. If any of

these properties are left empty, they will not be used to check for alarm

conditions. When you set these properties, you must also set the

corresponding hysteresis properties, which are described later in the table.

Each alarm condition caused by the offset properties will cause the

<UCPTpointStatus> of the input data and alarm data points to be set to a

different status. For more information on this, see see Hysteresis Levels

and Offset Limits on page 7-13.

NOTE: If you use the AlarmGeneratorGet function to return the

configuration of an Alarm Generator whose input or compare data points

use the format type SNVT_temp_p#US or SNVT_temp#US, then the

values of these properties will be displayed using the SNVT_temp_f#US

format. This rule applies to all formats that use the #US specifier.

7-10