Installation manual

900M050U00  Athena Controls, Inc. 11-1

11. Ramp/Soak Recipe Parameters –

Optional

11.1 Introduction

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. As the controller

executes a segment, the controller gradually (over the period of the ramp time) changes

the currently used setpoint up or down until the setpoint reaches the soak level. During

the duration of the soak time, the controller maintains the setpoint at the specified soak

level. When the soak time has elapsed, the controller executes the next segment of the

recipe.

If at least one front panel alarm was configured for “events”, then you can activate and

deactivate an alarm based on the recipe reaching particular events in its execution, such

as the start of a numbered soak period.

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 on any of the

controllers (including the 1ZC) using the optional serial communications interface.

Alternatively, all these controllers can be configured to execute a single gradual ramp to

setpoint at startup or on demand.

If both outputs are configured for use with alarms or turned off (using the output type

parameters), then the ramp/soak menu will not be displayed. However, if at least one

output is available for control, then the r-Sr-S (ramp/soak) menu will be available if the

security access level is set to USErUSEr, (user), CnF9CnF9 (configuration) or FACtFACt (factory).

The access level in all new 16C, 18C, and 25C controllers is set to CnF9CnF9 at the factory. If you cannot

see the ramp/soak menu, the access level has been changed to a more restrictive level. Instructions for

changing the access level are in Section 17.