Instruction manual

8310 TGI
Varec, Inc. 57
5.4 Varec Mark Space Level Transmitter (MSTX)
The Varec Mark Space Level Transmitter (MSTX) point provides an interface to
various Mark Space transmitters such as the Varec 1800 and 1900, as well as
instruments that emulate Mark Space communications such as the 2900 FTT, 4000
ATT, 4100/4200 MFT and 4590 TSM. This point provides both level and temperature
data. Point and gauge status information is also available in this point block. This
point used to be designated VW1900.
5.4.1 Parameters
The database parameters used by the MSTX point are listed and described below:
Configuration Parameters Function
Tag A Tag can contain 15 bytes of data and can include any printable ASCII
character. Tags can be used to identify points indicating the use of the
point such as, Modbus Slave or Register Value1. The default tag is set
to MSTX.00.
Description The point description can contain 30 bytes of data and can include any
printable ASCII character. Descriptions can be used as information
relevant to any aspect of the point, such as its use, location, operating
information, etc. The default description is set to “MSTX.00”.
FastScanMode Places the MSTX point in the Fast Scan mode. Values are Enable or
Disable.
ID Physical Address of the tank gauge transmitter (0-999).
Module Not used.
SpeedMode Allows you to set the speed mode. Selections include High, Low or
Undefined.
DataMode Data format of the transmitter encoder. Values are:
0: Fractional
1: Decimal
2: Metric 0-20 meter
3: Metric 0-30 meter
LevelDeadband Specifies the amount of change in the Level that must occur for the
Value to be updated each Change of State period. The default is 0.
LevelOffset Specifies the amount of offset to add to the Level. The default is 0.
TempMode Allows the user to enable or disable the temperature mode or specify
the temperature format. Values are:
F: Fahrenheit (Model 1900 Type)
C: Celsius (Model 1900 Type)
3: Fahrenheit (Model 1800 Type)
4: Celsius (Model 1800 Type)
5: Fahrenheit (Model 1800 Type)
6: Celsius (Model 1800 Type)
U: Undefined - Assumes the transmitter does not support
temperature.
Any other value will assume the transmitter does not support
temperature (40 bit Mark/Space message).