Installation manual
User Interface
900M050U00 Athena Controls, Inc. 2-13
2.4.6 Starting, Pausing, and Terminating Recipe Execution
To start execution of the single-setpoint ramp
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or a multi-step recipe:
1. Press the key until CtrLCtrL is displayed on the top line and the current mode on the
lower line. (All modes are described in 1.3.1.) For example, if the controller is in
normal (automatic) mode, pressing the key for approximately three seconds will
display:
CtrLCtrL
nornor
2. Press the or key to cycle through the modes. If a single-setpoint ramp or
multi-step recipe has been configured as described in Section 11, r.Sr.S (ramp/soak)
will be one of the mode choices on the lower line. The display will show:
CtrLCtrL
r.S r.S
3. Press the key again (briefly).
• If the controller is configured to execute a single-setpoint ramp, the display will
show rSrS on the top line, alternating with the process variable.
• If the controller is configured to execute a multi-step ramp, the display will show
rS.r1 rS.r1 (ramp/soak ramp 1) on the top line, alternating with the process value.
In either case, the lower line will display the setpoint, which has been changed by the
controller to match the process value. For example, if the PV is 105, you would see:
rS.s1rS.s1 alternating 105105
105105 with 105105
As the single-setpoint ramp or multi-step segment 1 ramp time passes, the setpoint will
be ramped toward the target value.
• In the case of a single-setpoint ramp, this is the normal setpoint.
• In the case of a multi-step recipe, this will be soak level 1 value.
What happens when the target setpoint is reached depends on several factors.
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• In the case of a single-setpoint ramp, the display will change to the normal
operating display with the PV on the top line and the SV on the lower line, unless
the termination state parameter was used to specify that the controller should be
placed in standby when the ramp up to setpoint has been completed.
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If single-setpoint ramp is enabled, then the ramp will be executed automatically at startup; see 11.1.
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Whether the process value actually matches the setpoint when the ramp time has elapsed depends on
how you have configured your recipe. If you have not used the holdback feature and have not configured
the ramp time realistically for your process, the PV may not match the SV when the ramp time has
elapsed. Read Section 11, then enable holdback or fix your ramp time so that the PV has time to catch
up to the SV.
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This is also what happens if a single-setpoint ramp is executed automatically at startup.