Installation manual
Series C Controller Configuration and Operation Manual
2-8 Athena Controls, Inc. 900M050U00
2.4 Using the Keypad
2.4.1 Key Functions
The 16C, 18C, and 25C controllers have four keys. The functions of the keys are
described below. The rest of this subsection contains instructions for changing the
setpoint, viewing and changing the controller’s mode, changing values in the controller’s
database, etc. using these keys.
Key Name Function
menu access
Accessing the configuration menus and security access
code – Pressing and holding this key for approximately three
seconds accesses the configuration menus. Once a menu
name is on display, this key is used to step through the
available menus.
When the controller is in manual mode, this key is used to
toggle between the display of the output 1 percent and the
output 2 percent.
When the normal operating display (PV and SV) is on display,
pressing and holding this key for approximately ten seconds
shows the current security access level. The level can then be
changed.
up Increasing the value on display or cycling up through a
list of choices – Pressing and releasing this key increases the
numerical value on the operator display or configuration
display one unit. Pressing and holding it increases the value
more rapidly.
When a string of characters representing a configuration
parameter choice or a mode choice is on display, pressing this
key displays the previous choice on the list.
down Decreasing the value on display or cycling down through
a list of choices – Pressing and releasing this key decreases
the numerical value on the operator display or configuration
display one unit. Pressing and holding it decreases the value
more rapidly.
When a string of characters representing a configuration
parameter choice or a mode choice is on display, pressing this
key displays the next choice on the list.
mode/enter Viewing the mode or selecting the currently displayed
configuration choice or value – While the controller is in use
(controlling a process loop), this key is used to view the current
operational mode. (See 1.3.1 for available control modes.)
When a configuration menu has been accessed, this key is
used to step through the parameters within a menu, and to
write the currently displayed choice or value to the controller’s
database.