Xylem TB500 ONLINE TURBIDITY ANALYZERS User Manual

Page 29

TB500 (2/07)
Rev. 1.0

FLOW THROUGH

CUVETTE

ULTRASONIC

TRANSDUCER

SENSOR
(TOP VIEW)

ULTRASONIC

SPRING
CONNECTIONS

Figure 6: Operational parts of the Ultrasonic Cleaning System

8.3

RS-485 Outputs

The TB500 has the capability to operate in three different RS-485 modes for all models.
Included is a mode for interfacing into the Online Scada software package (section 8.3.1
below), and a simple communication mode. A third operating mode is the Modbus
communications. All modes will automatically configure and do not require any changes
or selections.

8.3.1 Online SCADA
The TB500 can operate as a small SCADA system with an optional PC software package.
This system allows for an interface with up to 255 TB500’s for the purpose of data
logging. This system will interface directly with common database and spreadsheet
software.

8.3.2 Simple Communication
The TB500 can provide basic communications over simple programs such as the
Hilgraeve HyperTerminal that is included with most Microsoft Windows packages. The
user could also use Visual Basic or other programs. The default communication
parameters are 8 bits, no parity and 1 stop bit. These can be changed in the Extended
CONFIG

menus 7.13 RS-485 Parameters.

The master computer will send out:

• Byte #1 the attention character “:” in ASCII or 3A Hex
• Byte #2 the address of the TB500 being queried
• Byte #3 & 4 CR LF or 0D 0A in hex