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4Ć179Target Data Configuration

Original Ć June 1990 CE4.2:CL6211

4.7.1.3 Trend Target Data Configuration Items

The TREND TARGET DATA form is used to define items related to

targeting a point to a DC6971 Trend Unit. For additional Trend Unit

configuration information, refer to Configuring Type DC6971 Trend Units.

Current? Ċ This field is set to YES if the device specified by the

configuration Device on the same row is in the current target device

group. A target device group is made up of all the PROVUEs,

controllers, and CHIPs that have the same Reporting Mode, Sample

Interval and Dead zone, and within the device type have the same field

values (other than DBI or index values). A target device group may

consist of up to 32 devices.

Device Ċ The name of the device to which the point is to be targeted.

This is a scrolled list of all the devices that the point is being targeted to.

This is a readĆonly field, which was defined on the TARGET DATA form.

Historic Enabled Ċ If the selected point variable is to be historically

trended (its values are to be stored on the Trend Unit's diskette), select

YES. Otherwise, select NO.

Historic Rate Ċ This field specifies the sample rate at which the

reported point variable is accessed by the Trend Unit. The sample rate

may be 5, 15, or 30 seconds, or 1, 4, 8, 24, or 72 minutes.

Variable Ċ This field is used to select the point variable that will be

trended. Valid entries are PV, SP, VO, BIAS, and RATIO, depending upon

the source point type.

Volatile Blocks Ċ If volatile trending has been enabled for the selected

point variable, the number of Trend Unit memory blocks to be allocated

for that variable must be entered. The valid range is any number

between 1 and 255, where 1 block equals 60 sample values.

Volatile Enabled Ċ If the selected point variable is to be trended (its

values are to be stored in the Trend Unit's RAM), select YES. Otherwise,

select NO.

Volatile Rate Ċ This field specifies the sample rate at which the reported

point variable is accessed by the Trend Unit. The sample rate may be 5,

15, or 30 seconds, or 1, 4, 8, 24, or 72 minutes.

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Response Electronics CL6011B Dokumentacja Strona 261