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7.3 Auto/Manual control switching
Select Auto/Manual control function during [52] OUT/OFF key function selection in the Setup mode.
By pressing
key in the PV/SV display mode, Auto/Manual control function can be switched.
If control action is switched from automatic to manual or vice versa, balance/bumpless function works
to prevent a sudden change in manipulated variables.
When automatic control is switched to manual control, the MEMO display indicates [ ].
The output MV (manipulated variable) can be increased or decreased by pressing
or
key to perform
the control.
By pressing
key again, the unit reverts to the PV/SV display mode (automatic control).
Whenever the power to the KT4H is turned on, automatic control starts.
7.4 Indicating output MV (manipulated variable)
To indicate output MV (manipulated variable), press
key for approx. 3 seconds in the PV/SV display
mode. The MEMO display indicates [ ].
By pressing
key again, the unit reverts to the PV/SV display mode.
7.5 Auto-tuning/Auto-reset Perform/Cancel
Auto-tuning/Auto-reset Perform/Cancel can be conducted in “[5] Auto-tuning/Auto-reset selection” in the Sub
setting mode.
How to perform Auto-tuning/Auto-reset
(1) Press
key while pressing
key in the PV/SV display mode.
The unit proceeds to the Sub setting mode, and [5] Auto-tuning/Auto-reset selection item appears.
(2) Select Auto-tuning/Auto-reset “Perform:
/
” with
key, and press
key.
Auto-tuning/Auto-reset will initiate.
While performing Auto-tuning/Auto-reset, the AT indicator is flashing.
If Auto-tuning is not finished after 4 hours, it is automatically shut down.
Auto-reset is cancelled in approximately 4 minutes. It cannot be released while performing this function.
How to cancel Auto-tuning/Auto-reset
(1) Press
key while pressing
key in the PV/SV display mode.
The unit proceeds to Sub setting mode, and [5] Auto-tuning/Auto-reset selection item appears.
(2) Select Auto-tuning/Auto-reset “Cancel:
” with
key, and press
key.
Auto-tuning will stop.
If Auto-tuning is cancelled during this process, each value of P, I, D, ARW returns to the previous values
before the Auto-tuning was performed.
Auto-reset is cancelled in approximately 4 minutes. It cannot be released while performing this function.
