Super Systems 7EK 31082 - Manual (Page 24)

19 GB
SMART function
It is used to optimize automatically the control action.
At instrument power up, if the SMART is ON, the second
algorithm will be enabled.
To enable the SMART function, push the FUNC
pushbutton until "Snrt" parameter is shown.
Pushing
s or t set the display "On" and push the
FUNC pushbutton.
The SMRT LED will turn on or flashing according to the
selected algorithm.
When the smart function is enabled, it is possible to
display but not to modify the control parameters (Pb, ti, td,
and rC).
To disable the SMART function, push the FUNC
pushbutton again until "Snrt" parameter is shown.
Pushing
s or t set the display "OFF" and push the
FUNC pushbutton. The SMRT LED will turn off.
The instrument will maintain the actual set of control
parameter and will enabled parameter modification.
NOTES:
1) When ON/OFF control is programmed
(Pb=0), the SMART function is disabled.
2) The SMART enabling/disabling can be
protected by safety key (see P33).
LAMP TEST
When it is desired to verify the display efficiency, push
FUNC pushbutton for more than 10 s. The instrument will
turn ON, with a 50 % duty cycle, all the LEDs of the
display (we define this function "LAMP TEST").
No time out is applied to the LAMP TEST.
When it is desired to come back to the normal display
mode, push FUNC pushbutton again.
During the LAMP TEST the instrument continues to
control the process but no keyboard functions are
available (exception made for the FUNC pushbutton).
"LOOP BREAK ALARM" FUNCTION
The functioning principle of this alarm is based on the
concept that, with a steady load and steady power output,
the process rate of rise [deviation (P52)/time (P53)] is
steady as well.
Thus, analyzing the process rate of rise of the limit
conditions it is possible to estimate the two rates of rise
which define the correct process behaviour.
The limit conditions are:
3 for one control output: 0% and the value of the "OLH"
parameter or
3 for two control outputs: -100% and the value of the
"OLH" parameter,
The LBA function is automatically activated when the
control algorithm requires the maximum or the minimum
power and, if the process response is slower than the
estimated rate of rise, the instrument generates an alarm
indication in order to show that one or more element of the
control loop is in fault condition.
Deviation: from 0 to 500 units.
Timer: from 1 sec. to 40 min.
Hysteresis: from 1% to 50 % of the output span.
NOTES:
1) The LBA does not operate during the soft start.
2) For this special function the hysteresis is related with
the power output value and not with its rate of rise.
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