Varec 8300 series, Installation And Operation Manual, Page: 106 / 150

Tank Gate Interface
96 Installation and Operations Manual
5.15.2 Application
The X76CTM point provides an interface to Ronan X76CTM Continuous Tank Monitor. The
Ronan system is connected directly to a 8303 Dual RS-485 Communications Interface Module.
The ID must match the unit address of the X76CTM.
The Baud Rate must match the Baud Rate of the interface. The individual tank data address is
entered in the cTankValue field. Conversion from Metric to English (or vice-versa) can be
performed be setting the LevelConvert and the TempConvert parameters.
Report Causes automatic notification to the Host (in response to a Change of
State Request) when the Level, Temp, Position changes. Parameter value
can be High, Low or No. Report=No disables automatic notification.
Points with Report = High will be sent before points with Report = Low.
The default is High.
Maxtime Specifies the maximum time (in secs) between automatic Change of
State responses being sent to the Host. Report must be set to either Low
or High for the Value parameter to be sent in response to a Change of
State Request. A value of 0 disables this option. Non-zero values cause
responses to be sent even if the value has not changed since the last
message. The maximum is 65535 seconds. The default is 240.
Watchdog Enables the watchdog task on the Motherboard. The watchdog task
monitors the X76CTM point on the 8203 Dual RS-485 Communications
Interface Module and verifies it is scanning for gauges. If the 8203 Dual
RS-485 Communications Interface Module fails, the 0x0010 and the
0x0001 bits of the PntStatus will be set to indicate the failure.
Dynamic Parameters Function
Level IEEE Floating point value representing the tank level. The data is
returned in inches during the configuration of the gauge.
WaterLevel Floating point value representing the product water interface level. Level
is returned in inches.
GrossVolume Floating point value representing the Product Volume. Units are gallons.
TotalGVolume Units are gallons.
Temp Floating point value representing the product temperature. The data is
returned in the format specified during the configuration of the gauge.
NetVolume Floating point value representing the Standard Product Volume. Units
are gallons.
LeakRate Units are gallons per hour (gph).
Value Last Leak test rate in gallons per hour (gph).
Last_Stop Time of last test.
StatusFlag Tank Status. A field with different flags that correspond to tank alarms.
Consult X76CTM manual for data.
PntStatus Byte value indicating status of point. Values are:
0x0000: No Error
0x0001: Gauge is offline
0x0002: Data is invalid
0x0004: Command Timeout
0x8000: Gauge did not response to last request (pre-fail)
Elapse Time of the last scan
PntCheckSum CRC-16 Checksum for point’s static Configuration Parameters.
Config Parameters Function