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LNS Programmer's Guide

202

3. When a monitor set is opened, each network variable monitor point in the

set will use the default options established in either step 1 or step 2. If

you want a network variable monitor point to use different options during

a given monitoring session, you can do so by writing to the

NvMonitorPoint object’s CurrentOptions property after the monitor

session has started (i.e. the monitor set has been opened). Remember that

these changes take effect for the current session only.

The following code sample sets the current values for a network variable

monitor point’s PollInterval property.

Set NvMonitorPointOptions = NvMonPoint.CurrentOptions

NvMonitorPointOptions.PollInterval = 1500

Set MonitorPoint.CurrentOptions = NvMonitorPointOptions

NOTE: When performing these steps, remember that the NvOptions,

DefaultOptions and CurrentOptions properties are not passed by

reference. When you modify an NvMonitorOptions object returned by any of

these properties, the changes will not take effect until the modified object is

passed back to the NvOptions, DefaultOptions or CurrentOptions

property of the applicable monitor set or monitor point.

NvMonitorOptions Object

The three properties mentioned in this section (NvOptions, DefaultOptions,

CurrentOptions) that apply to network variable monitor points all provide access to an

NvMonitorOptions object. The NvMonitorOptions object contains a set of properties

that define the behavior of network variable monitor points when they are enabled.

Table 9.2 lists and describes these properties. The default values listed in Table 9.2 are

the defaults that are initially applied to the NvMonitorOptions object accessed through

a monitor set’s NvOptions property.

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