EFLOW EF-Series - Communications Ports; Liquid Crystal Display

Using the EF-Series Unit
2-10 Rev 2/01
2.4.3 Liquid Crystal Display
A two-line Liquid Crystal Display (LCD) panel is mounted on the Main Electronics Board. The panel
has automatic contrast adjustment due to temperature sensing and bias adjustment circuitry on the
Main Electronics Board.
The LCD panel remains on at all times when the power applied is in the valid operating range. The
panel cycles its display through a configured list of up to 16 parameter values. The first two displays,
which cannot be configured by the user, show values for time and date, operating voltages, and battery
condition. The next five displays are configured by the factory to show certain flow parameters, but
you may change their configuration. Refer to the ROCLINK User Manual for details on how to
configure the list of values for the LCD panel.
2.4.4 Communications Ports
The EF-Series unit provides two communication ports:
♦ Local Operator Interface port – LOI.
♦ Host port for communication to eFlow host – COM1.
2.4.4.1 Operator Interface Port – LOI
The Operator Interface port, also called the Local Operator Interface (LOI) port, provides direct
communications between the EF-Series unit and the serial port of an operator interface device
(normally an IBM-compatible PC). The interface allows you to access the EF-Series unit (using the
ROCLINK Configuration Software) for configuration and transfer of stored data. The LOI terminal
plus the RTS terminal on the Main Electronics Board provide wiring access to a built-in EIA-232 serial
interface, which is capable of 19.2k baud operation. The operator interface port supports only ROC
protocol communications. The LOI also supports the log-on security feature of the EF-Series unit if
the Security on LOI is Enabled in ROCLINK.
A cannon-type waterproof connector on the bottom of the enclosure provides connection through a
prefabricated cable (available from Fisher) for an operator interface device, typically an IBM-
compatible personal computer (PC) running the ROCLINK Configuration Software. Inside the EF-
Series unit enclosure, the cannon-type connector is wired to three terminals (LOI) on the Main
Electronics Board.
2.4.4.2 Host Port – COM1
The host port (also called the COM1 port) is activated by the installation of a communications card,
normally an RS-232 serial card. The host port is used to monitor or alter the EF-Series unit from a
remote site using a host or the ROCLINK Configuration Software. The host port automatically
configures itself based upon the specific communications card installed. The host port supports baud
rates up to 19.2K. The COM1 also supports the log-on security feature of the EF-Series unit if the
Security on COM1 is Enabled in ROCLINK.