Download 4 - Varec, Inc.

Dynamic Parameters
Function
Level
IEEE Floating point value representing the corrected tank level. The data
is returned in the format specified during the configuration of the gauge.
Status
Hart Command 48 Status. Refer to manufacturer for additional
information.
Level1
Floating point value representing the uncorrected tank level.
Ullage
Measured Distance. Distance from radar to product.
CustodyMode
Weights & Measures Status
MediaType
Dielectric constant (DC) of the product.
Device Status
TM4590 Internal Status
Elapse
Time of last scan.
Interval
Amount of time (in HR:MIN:SEC) between scans of the gauge
PntStatus
Byte value indicating status of point. Values are:
0x0000: No Error
0x0001: No Response from Device
0x1000: W&M Seal is enabled
0x4000: Failure of the Model 8203. This bit is set if the Watchdog task
on the Motherboard determines that the Model 8203 has stopped
updating.
PntCheckSum
CRC-16 Checksum for point’s static Configuration Parameters.
WMChecksum
Weights & Measures Checksum. This parameter is calculated when the
WMSeal parameter is set to Enable.
Application
The Micropilot Radar (RG7000) point must communicate via a Tank Side Monitor (TM4590). All
communication parameters such as ID, Module, Chan, BaudRate, etc., must be set to
communicate to the TM4590. Once communication is established through the TM4590, the
RG7000 point then automatically retrieves all data.
Modbus Protocol
Using the Modbus Protocol, RG7000s are connected to a Model 8203 Dual RS-485 Module
configured with Modbus firmware (MODx_xx). The Model 8203 is automatically detected at
startup, and a MSCAN point is automatically created to manage the scanning task. The Module
and Chan parameters determine which Model 8203 will be used, and to which channel on the
8203 the tank gauge is connected. The ID must match the Device ID of the Tank Side Monitor
(TM4590) connected to the RG7000. Scanning begins when the Module is assigned.
Weights & Measures Protection
The RG7000 point can be sealed when used in a Weights & Measures application. Only certain
parameters can be sealed. These parameters will be shown in blue (CONSTANT parameters)
when unlocked and will be greyed out when locked. To seal the point, set the WMSeal to Enable.
Note that FuelsManager must be active in order to seal or unseal a point.
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Installation and Operations Manual