Installation manual

Introduction
900M050U00  Athena Controls, Inc. 1-3
menu access – used to access the menu system; within the menu system it
is used to move from menu to menu
up and down – used to change numeric values and to scroll through
lists of configuration choices
The front panel of the 16C, 18C, and 25C controllers includes LEDs that are used for
alarm annunciation, as well as to signal which controller functions are active. See
Section 2 for more information about the user interface.
1.2.3 Alarm Annunciation
In addition to the front panel LEDs for alarm annunciation on the 16C, 18C, and 25C
controllers, all the models (including the 1ZC) can be configured to use one or more
outputs for annunciation of high or low process alarms, deviation alarms, inverse band
alarms, and normal band alarms. See 1.7 for more details about alarm capabilities.
1.2.4 Ease of Configuration
The 1ZC, 16C, 18C, and 25C controllers all use the same configuration parameters, so if
you know how to configure one of the controllers, you know how to configure all of them.
The 16C, 18C, and 25C can all be configured using the front panel display and keypad to
access the hierarchy of menus as described in Section 4. Parameters that do not apply
to your control strategy will not be displayed. For example, if you choose on/off control
as the function for an output, then only parameters relating to on/off control will be
displayed for that output.
All the controllers can be configured using a personal computer. See 1.2.6 below for the
communication protocols supported.
1.2.5 Ramp/Soak Recipes
The 1ZC, 16C, 18C, and 25C can all be configured to execute ramp/soak recipes on
demand. A recipe consists of up to eight segments. For each segment you can
configure a unique ramp time, soak level (setpoint), and soak time.
If your process is not responsive enough to achieve the setpoint within the ramp time (or
maintain the soak level for the entire soak time), you can use the recipe “holdback”
parameter to “stop the clock” on the ramp time (and soak time) if the setpoint differs too
much from the process value.
Execution of a recipe can be started, paused, resumed, and terminated using the front
panel (or an optional contact/digital input) on the 16C, 18C, and 25C, or using a serial
communications interface on any of the controllers (including the 1ZC model).
Alternatively, all these controllers can be configured to execute a single gradual ramp to
setpoint at startup or on demand. Holdback can also be applied to this operation.
See Section 11 for more information about ramp/soak capabilities.