Filter
Top Products
59
8300 8315 L&J Tankway Software Description
4.19 L&J MCG2000 Tank Gauge (LJ2000)
The LJ2000 point provides an interface to L & J MCG2000 Tank Gauge
transmitters. This point provides both level and temperature data. Point and
gauge status information is also available in this point block. This point
executes on the Model 8315 Tank Gauge Interface module.
4.19.1 Parameters
The database parameters used by the LJ2000 point are listed and described below:
Configuration Parameters Function
Tag
A Tag can contain 15 bytes of data and can include any printable
ASCII character. Tags can be used to identify the name of the tank
being monitored The default tag is set to “LJ2000.00”.
Description
A description can contain 30 bytes of data and can include any
printable ASCII character.
ID
Physical Address (0-127). The default is 0
DevType
Tank Gauge Type.
DevType = 1 Uses a gray code table for CCW Varec gauges
DevType = 2 Uses a gray code table for CCW S&J gauges
DevType = 3 reports data in feet and hundredths of a foot
DevType = 4 reports data in 32nds of inches
Module
Physical address (1-4) of the Model 8315 used to interface to the
tank gauge transmitter. A value of 255 is undefined.
Filter
Gauge data filter constant. The Filter is used when scanning data
from an L&J gauge. A buffer is maintained for the last 8 readings.
The Filter determines how many of the reading in the buffer are
used when calculating the Level and Temp parameters. If all of
the level readings are within a deadband determined by the
LJSCAN LevelDeadband parameter, then the Level reading is
updated with the latest data. If a large change is detected (data
changed more than the LevelDeadband), then the Level is not
updated until the change between readings is less than the
LevelDeadband. The default is 3.
TempDeadband
Change of State temperature deadband value. This parameter is
used when the Report is High or Low to determine if a change of
state has occurred. This parameter does not affect the Temp
parameter value, only if it is automatically sent to the Host
system.
LevelDeadband
Change of State level deadband value. This parameter is used
when the Report is High or Low to determine if a change of state
has occurred. This parameter does not affect the Level parameter
value, only if it is automatically sent to the Host system.
Report
Causes automatic notification to the Host (in response to a
Change of State Request) when the Value Changes State.
Parameter value can be High, Low or No. Report=No disables
notification. Points with Report = High will be sent before points
with Report = Low. The default is High.