Instruction Manual
Tek-LCD 7801C
www.tek-trol.com
Technology Solutions
97
9
Operation
9.1
Viewing Screens
The controller displays various screens with bar graphs, numerical values, and relay status
throughout operation, according to the user-selected setup. There are two basic modes of
operation: Automatic scan or manual scan. The controller initializes in automatic scan mode. Press
Stop key to stop the automatic scan and use the Left or Right Arrow keys (Previous or Next) to
navigate through the various screens. Press the Scan key to resume automatic scanning.
The bar graphs are optional, they are enabled or disabled during Screens setup. The scaling of the
bar graph is done during the setup of each channel, and it can be different than the channel scaling
values.
9.1.1
Individual Channel View
To view the details of any channel, press the Menu key and then press Right Arrow key to view
the channels. Select the channel of interest. Navigate through the different items using the
navigation keys. A green bar indicates the selected item, press the Right Arrow key to step into
and see more details about the inputs and outputs related to the channel in view.
If applicable, alarms can be acknowledged, and totals can be reset from these screens. Simulation
and manual control are also available on the View screens.
9.1.1.1
Low & High Alarm Indication
•
The alarm set points are indicated by a line at the corresponding value on the bar graph.
Color selection is done in the Setup – Alarm menu or in the System – Display menu.
•
Active High Alarm:
Indicated by horizontal and vertical lines. The bottom of the vertical
line is the reset point of the high alarm. The high alarm is indicated on the left side of the
bar graph.
•
Active Low Alarm:
Indicated by horizontal and vertical lines. The top of the vertical line is
the reset point of the low alarm. The low alarm is indicated on the right side of the bar
graph.
•
Alarm set points are indicated by horizontal lines.
