
8303
Varec, Inc.
47
5.2
Saab Data Acquisition Unit (DAU)
The Saab Data Acquisition Unit point provides an interface to Saab Model 2100 Data
Acquisition Units. The DAU point interfaces to Saab DAUs using Modbus through a
Saab FCU. The 8203 Dual RS-485 Interface Module is used to connect to the FCU.
The 8212 Saab (TRL/2) Communications Interface Module is used to directly connect
to the DAU over the TRL/2 bus.
5.2.1
Parameters
The database parameters used by the DAU 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 the name of the tank being
monitored. The default tag is set to “DAU.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 “DAU.00”
Chan
Physical channel number to which the DAU is connected. On the 8203
Dual RS-485 Communications Interface Module, the Chan can be set to
1 or 2.
ID
Physical Address of the Data Acquisition Unit (0-999).
Addr
FCU Address (if Mode = 0x02)
Mode
Operational Mode. Values are:
0x01: Swap Mode
0x02: Communication via FCU
0x04: Read REX Temperature
0x08: FCU - Read 0x8000 Data Addresses
0x10: SAAB Swap Mode
0x80: ASCII Mode
BaudRate
Baud Rate for communications to the DAU device. Valid values are:
1200, 2400, and 4800.
ComParams
Defines the number of data bits and the parity used by the com port.
Valid values include:
8N - 8 data bits, No parity
8O - 8 data bits, Odd parity
8E - 8 data bits, Even parity
7O - 7 data bits, Odd parity
7E - 7 data bits, Even parity
The default is 8N.
TempUnits
Specifies the engineering units for the temperature data read from the
DAU.
F: Fahrenheit
C: Celsius
The TempUnits needs to match the units specified during the DAU
setup. The default is C
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. The default is C
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