Eurotherm 216, Руководство пользователя

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5 . 2 5 . 2
5 . 2 5 . 2 5 . 2 SMART ALGORITHM
SMART ALGORITHM
SMART ALGORITHM SMART ALGORITHM SMART ALGORITHM
This function gives best process control.
To enable the SMART function, press the
pushbutton for more than 1.5 s, when the
instrument is in normal display mode. The SMT
LED will be lit continuously or flash according to
the algorithm automatically selected.
When the SMART function is enabled, the control
parameters (
PB , , , , , TI , , , , , TD and rC ) can be displayed
but not modified.
When it is dasired to disable the SMART function,
press the pushbutton again (for more than
1.5 s) to turn the "SMART" OFF. The instrument
maintains the actual control parameters setting
and allows parameter modification.
NOTES NOTES NOTES NOTES NOTES:
1) During operation of the SMART function, the
relative cooling gain (if controlled by SMART) is
limited within the following ranges:
Cooling medium Span
Air 0.85 to 1.00
OIL 0.80 to 0.90
H
2
O 0.30 to 0.60
2) The SMART function uses a derivative time equal
to 1/4 of the integral time.
3) The limits of the proportional band settable by
the SMART function are programmed by
parameters P16, P17 and P18 .
4) The lower limit of the integral time settable by
the SMART function is programmed by
parameter P20 .
5) When ON/OFF control is programmed (Pb=0),
the SMART function is disabled.
6) SMART enabling/disabling can be protected by
the safety lock (see parameter P15).
5 . 3 5 . 3
5 . 3 5 . 3 5 . 3 INHIBITION OF THE OUT SIGNAL
INHIBITION OF THE OUT SIGNAL
INHIBITION OF THE OUT SIGNAL INHIBITION OF THE OUT SIGNAL INHIBITION OF THE OUT SIGNAL
(Power OFF mode)
(Power OFF mode) (Power OFF mode) (Power OFF mode) (Power OFF mode)
Keeping depress for more than 3 s the +
pushbuttons with device in normal display mode
it is possible to enable/disable the control output
(this function is not subject to lock/unlock rule)
When control output is disabled:
•
The device will function as an indicator
and the “OFF” indication appears on the
display (with device in Normal display
mode).
• The Out 1 goes OFF.
•
The Out 2 goes OFF if it is configured as
cooling output (P5 = 5), while it is forced
in no alarm condition if it is configured as
process, band or deviation alarm (P5 = 1
or 2 or 3).
It works normally if configured as measure
malfunctioning annunciator (P5 = 4) or
event
annunciator (P27 = 3, 4, 6, 7)
•
The Out 3 it is forced in no alarm condition
if it is configured as process, band or
deviation alarm ( P22 = 1 or 2 or 3)
• The self tuning algorithm cannot be turn
on/turn off. If Adaptive is in act the
algorithm is frozen and restarts
automatically when control output is
restored.
When control is restored the functions alarms
standby, soft start and control output rate of
rise will be activated as per power up.
The enable/disable control status is stored in
EEprom.
02-0316-1-DER.pmd 22/04/2004, 16.19 15