8315 L&J Tankway Software Description

TankGate Interface

 

 

4.20 L&J Scanner (LJSCAN)

The L&J Scanner point is used in conjunction with L&J Tank (LJ1000, LJ1500 and LJ2000) gauge points. This point provides dynamic and statistical data for the Model 8315 tank gauge interface module and L&J tank transmitters.

4.20.1Parameters

The database parameters used by the LJSCAN point are listed and described below:

Configuration

Function

Parameters

 

 

 

Module

Model 8215 module address

 

 

MaxRetry

Value between 1-10 indicating the number of times the scanner will

 

attempt to poll a tank transmitter that has not responded. Default is 2.

 

 

Timeout

Value between 0-30000 indicating the number of milliseconds the

 

scanner will wait for a response from a tank transmitter. Default is

 

2000.

 

 

ScanDelay

Value between 0-30000 indicating the number of milliseconds the

 

scanner will delay between each poll. Default is 500.

 

 

LevelConvert

Determines the units in which the level data will be displayed. F: feet, M:

 

Meters m: Millimeters.

 

 

TempConvert

Determines the units in which the temperature data will be displayed. F:

 

Fahrenheit, C: Celsius.

 

 

LevelFilter

Value used by LJ1000, LJ1500 and L2000 points for filtering level

 

changes

 

 

TempFilter

Value used by LJ1000, LJ1500 and LJ2000 points for filtering

 

temperature changes

 

 

HoldOff

Gauge down holdoff count. The HoldOff is used to reduce the number

 

of scan requests issued to a gauge that is not responding.

 

 

ScanTimeout

Time value used to set an alarm bit in the PntStatus parameter of

 

LJ1000, LJ1500 and LJ2000 points for gauges that are not responding or

 

responding with errors.

 

 

Dynamic Parameters

Function

 

 

ID

Address of gauge currently being scanned

 

 

Cmd

Command currently being sent to the gauge

 

 

Pnt

Point currently being executed

 

 

NumRequests

Number of gauge polls since last reset

 

 

NumComErrors

Number of gauge polls which resulted in an error.

 

 

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Installation and Operations Manual

Page 72
Image 72
Varec 8315 Series manual 20 L&J Scanner Ljscan, Command currently being sent to the gauge, Point currently being executed