Справочник Пользователя для Varec 8315 Series

8315 L&J Tankway Software Description

TankGate Interface

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Installation and Operations Manual

4.3

Database Organization

Points are the individual instances of software blocks. Examples include Whessoe Varec 

1900 (WV1900) and SCALER points. In both cases the user configures the Config 

parameters and is provided real time data through the Dynamic parameters.

Data parameters in the TankGate are addressed using a “Type.Number.Parameter” 

format. For example, “WV1900.02.Level” refers to WV1900 Tank Gauge #2’s IEEE 

floating point level. This format and corresponding fields are described below.

The TYPE field represents the Point Type. There are many different point Types in the 

TankGate, referred to generically as TankGate Software Blocks. Some of the point types 

include the COM (Communications), SYS (System), WV1900 (WV1900 Tank Gauge) point 

types. Each Type performs a different function.

The NUMBER field represents the instance of the point type. For example, the AI point 

may have up to 32 instances, which are addressed using the NUMBER field. Each instance 

shares the same data structure definition, yet each point has unique data values. In the 

case of the AI software block, each point manages a single input channel. 

The PARAMETER field represents the items in the data structure of the point type. 

Examples of parameters include Value, Status, PntRef and RawValue. This field is 

explained in greater detail in the following section.

Each parameter is defined by its Parameter Class and Data Type. The following 

subsections describe Parameter Classes, Parameter Data Formats and Common 

Parameters.

Each parameter, such as Value or Channel, is classified as one of the following classes:

The user-related parameters are the Config, Command and Dynamic parameters. These 

parameters are available in the Edit Point window of ViewRTU. The remaining parameters 

are internal to the Software Block.

Parameter 

Class

Description

Config

Configuration parameters such as channel numbers, tags, descriptions, 

ranges, operating modes, point references, constants for formulas and 

timing information.

Dynamic

Real-time data such as the value or the status. Dynamic data is calculated or 

measured during point execution scans, which occur every 250 msec.

Command

Output command data

Constant

Weights & Measures parameter

Scratch

Temporary data that is typically hidden from the user

System

System data (should not be changed by the user)