
8303
Varec, Inc.
83
5.12.2 Application
The RTG point provides an interface to Saab Radar Tank Gauges (RTG) using two methods:
•
Directly to the TRL/2 bus using a 8312 Saab (TRL/2) Interface Module
•
Via an FCU, using a 8303 Dual RS-485 Communications Interface Module (MDTGx_xx
firmware)
8312 Saab (TRL/2) Interface Module
The 8312 Saab (TRL/2) Interface Module provides the means to connect directly to the TRL/2
bus. The 8212 Saab (TRL/2) Interface Module is automatically detected at startup, and an
MSCAN point is automatically created to manage the scanning task. Chan determines which
Channel is used for communications to the slave device. The Chan parameter must match the
channel used to communicate with the Saab RTG.
GaugeStatus
Integer value indicating status of the gauge (Integer Register 6). Values
are:
0x0001: Bad Level
0x0002: Bad Temp
0x0004: Bad EE
0x0008: Bad EE Checksum
0x0010: Bad RAM
0x0020: Bad EEPROM
0x0040: Local Modifications
0x0080: No Calculation
0x0100: CFG Error
0x0200: Calc Error
0x0400: Bad CPU Board
0x0800: Bad Comm Board
0x1000: Low Encoder Battery
Rate
Level Rate
TankLevel
Tank Level
Ullage
Ullage
Analog1
Analog Current 1
Analog2
Analog Current 2
Analog3
Analog Current 3
PntStatus
Byte value indicating status of point. Values are:
0x0000: No error
0x0001: Gauge Not Responding
0x0010: FCU is offline (if Mode =0x02)
0x1000: Weights & Measure Seal is Enabled
0x4000: Failure of the 8312 Saab (TRL/2) Interface Module . This bit is
set if the Watchdog task on the Motherboard determines that the 8312
Saab (TRL/2) Interface Module has stopped updating.
Elapse
Time of the last scan
WMCheckSum
Weights and Measures Checksum. This parameter is calculated when the
WMSeal parameter is set to enable.
PntCheckSum
CRC-16 Checksum for point's static Configuration Parameters
Dynamic Parameters
Function
Содержание 8300 series
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