Varec 4000 - Manual (Page 21)

11
4000 Configuration
3 Configuration
The Varec Model 4000 Advanced Technology Transmitter (ATT) must be configured for the specific tank, attached
sensors, and host interface. This section provides detailed information on ATT configuration.
The ATT can be configured with a 1200 Hand Held Terminal or from a host program such as Varec TankView.
3.1 Configuration Parameters
Configuration parameters associated with ATT operation are entered and modified using the Model 1200 and can be
divided into the following areas:
•
General Configuration - includes units of measure, level calibration, temperature type selection, and alarm
setpoints.
•
Host Configuration - includes the type of host interface used, baud rate selection, and emulation modes for other
level transmitters.
3.2 1200 Hand Held Terminal
The ATT can be used with a 1200 Hand Held Terminal, see Figure 3-3 on page 13. The Model 1200 provides a local
terminal interface to configure the ATT and encoder at tankside. It is connected to the ATTI bus. It can be physically
attached via two banana plugs located inside the terminal block housing.
The ATT uses the Model 1200 in a different mode of operation. Normally, the Model 1200 polls the ATTI BUS device,
recognizes it, and goes into an internal menu system that is specifically tailored to that ATTI Bus device. The ATT
however, uses the Model 1200 in what is called ASCII Terminal mode. In this mode, the Model 1200 sends keyboard
activity to the ATT and displays screen information from the ATT. The ATT can not be configured with the Rosemount
Model 275 Terminal.
Because of the way the ASCII Terminal mode works on the Model 1200, the ATT is unable to poll any ATTI BUS device
while communicating to it. The ATT goes from an operational mode to an off-line mode. The operational mode is
automatically switched to when the Model 1200 is removed from the ATTI BUS bus.
Warning! The 1200 Hand Held Terminal on the ATT is not Intrinsically Safe. Care must be taken to only use in a non-hazardous
environment.
Function keys F1 through F4, defined in Figure 3-1 on page 11, are used for basic scrolling of the ATT menus and
selection of configuration parameters.
Table 3-1: Model 1200 Function Keys
Alpha and numeric information is entered from the keypad directly. Numeric data is entered using a single keystroke,
while alpha information is entered with a two-key combination. The two-key combination for alpha data consists of a
shift key followed by a numeric key to select the desired alpha character.
Function Key Description
HELP Help Message
F1 Scroll Up
F2 Scroll Down
F3 Alter/Backspace
F4 Enter
Previous Function [Ü] Return to previous menu or abort data entry