
8303
Varec, Inc.
101
6.2
Gauging Systems Inc. ASCII Scanner (GSISCN)
The GSISCN point provides an interface to GSI 2000 ASCII Tank Gauge transmitters.
This point provides both level and temperature data. Point and gauge status
information is also available in this point block. This Software Block executes on the
8303 Tank Gate Interface.
6.2.1
Parameters
The database parameters used by the GSISCN point are listed and described below:
6.2.2
Application
The GSISCN point provides a method for monitoring the communications between the
8303 Dual
RS-485 Communications Interface Module
and the GSI Transmitter. This point provides statistical
data describing the performance of the communications bus. This point also displays the point
being scanned as well as the response data from the transmitter.
This point is also used to set the level and the temperature units transmitted by the Tank Gate
Interface.
Configuration
Parameters
Function
Chan
Communications channel to which the gauge is connected. For a 8203 Dual RS-485
Communications Interface Module Chan is either 1 or 2.
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 1000.
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: Millimeters. If
no value is specified, no conversion will be performed.
TempConvert
Determines the units in which the temperature data will be displayed. F: Fahrenheit, C:
Celsius. If no value is specified, no conversion will be performed.
Dynamic Param-
eters
Function
ScanCmd
Allows you to Enable scanning, Disable scanning, or Reset statistical values (Num
Trans, Num Comm Error, etc.).
ID
Physical Address of the tank gauge transmitter (0-999).
Pnt
Point currently being executed.
ReplyData
The reply data from the gauge.
NumRequest
Number of gauge polls since last reset.
NumTrans
Number of transactions.
NumComErrors
Number of gauge polls which resulted in an error.
NumTimeouts
Number of scan time-outs.
NumScanList
Number of points in the scan list.
PntCheckSum
CRC-16 Checksum for point’s static Configuration Parameters.
Содержание 8300 series
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