Micromod MOD: Modcell 2050R Users Guide - Manual (Page 173)

IB-23C650
TUNING
Cancellation During Execution
Press the manual key to cancel the autotune cycle during execution by the
controller. This will prevent completion and will place the controller in the
manual mode. The controller output will be changed to the starting output
value prior to the execution of autotune.
If the controller is in automatic mode when the cancellation is executed, the
controller will cancel the autotune cycle and will change to manual mode. The
controller output value will be at the last automatic calculated value prior to the
cancel execution. The controller output can be manipulated with the UP/DN
keys, or pressing the auto/manual key again will bumplessly transfer back to
automatic mode and the controller will be using the tuning constants that
existed prior to autotune activation.
Autotune Restart
Autotune can be reactivated at anytime after a cancellation. Repeat the setup
procedure in Table 13.
Automatic Cancellation and Diagnostics
The controller may cancel the completion of an autotune execution or may
allow successful completion while providing a caution prompt to the operator.
There will be a series of two display prompts on the digital displays. The first
prompt informs the operator that either an autotune cancellation (failure) or a
caution has occurred. Pressing the scroll key when this first prompt occurs
provides a second prompt that allows the operator to determine what should
be done to obtain a completely successful autotune.
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