User`s manual

Watlow Series SD ■ 47 ■ Chapter 8 Profiling
* The Lockout parameter in the Setup Page determines your level of access to the other pages and menus, including the Pre-Run
and Run menus.
menu. Selecting [~Off] in the upper display will stop the profile and move the set point to [~Off].
To resume a profile on hold:
1. You must start from the Home Page. Press the Infinity ˆ key to exit a menu and return to the Home
Page. Press the Infinity ˆ key to enter the Pre-Run menu. [SelC] will appear in the lower display.
2. Use the Up ¿ or Down ¯ key to select [resU] in the upper display. The profile will continue starting
with the step it was running when it was placed on hold.
Editing a Profile on Hold
The profile can be edited* while in the hold mode. If you edit a step that has not yet been executed, the con-
troller will execute that step using the new settings once the profile is resumed. When editing a step that is already
in progress, the controller will adjust the current step utilizing the changed settings once the profile is resumed.
The step will run as if it was the beginning of the step, including the jump count for a jump step. For example, if
you are 3 minutes into a 20 minute step and you change the time, the step starts over at the beginning of the step
when the profile is resumed. The new settings will be retained and used in future runs of that profile.
Step Types
Set Point Step
The set point step is used to establish a controller setting within a profile. Set points can be established instan-
taneously or over some period of time. Establishing a set point over time is also referred to as ramping. The Series
SD allows for two methods of expressing a set point ramp, time-based or rate-based. Use the Profile Type [Ptyp]
parameter on the Setup Page to select the ramp type
When expressed as time [~~ti], the user enters the target set point and the amount of time desired to incre-
ment the current set point towards the target set point. Setting a time of 0 hours, 0 minutes, and 0 seconds causes
the set point to be established instantaneously.
When expressed as rate [rate], the user enters the target set point and the rate in degrees per minute to incre-
ment the current set point towards the target set point. Setting a ramp rate of 0 degrees per minute causes the set
point to be established instantaneously. In either time or rate based programming, it is only a manipulation (incre-
ment or decrement) of the controller's setting, not the actual process value. To limit set point movement or timing
based on the actual process value, use the Guaranteed Soak function and/or the Wait-for Process function of a Soak
step.
Soak Step
A Soak step maintains the set point from the previous step for the time in hours, minutes and seconds entered
into the step. It is not necessary to enter a set point for this step, only the time duration, the event output states
and the Wait-for Process function. The Wait-for function can be enabled or disabled from the Wait-for Process En-
able [WF;P] for each individual Soak step. The Wait-for Process function causes the controller to pause the timer
until the process value passes through the Wait-for Process value [WPr]. Once the Wait-for Process value is satis-
fied, the Wait-for function is not active until the step runs again.
Note: If you have Guaranteed Soak Deviation enabled, the Wait-for Process function is satisfied once the process enters the Guaranteed
Soak Deviation window.