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8315 L&J Tankway Software Description TankGate Interface
62 Installation and Operations Manual
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.
4.20.1 Parameters
The database parameters used by the LJSCAN point are listed and described below:
Configuration
Parameters
Function
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.