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SX25 Series Process Controller - Spirax Sarco

SX25 Series Process Controller - Spirax Sarco

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Second group parameters<br />

The display will show<br />

Stop<br />

tvn£<br />

This is used to start the automatic<br />

tuning. Using this table enter the<br />

following values into these<br />

parameters.<br />

Press the enter key to save<br />

the value entered and to move to<br />

the next parameter.<br />

When the last parameter has been<br />

entered, press the enter key<br />

to save this value.<br />

To exit press the scroll key .<br />

The display will show: PASS pass<br />

Press the scroll key again<br />

and the display will return to the<br />

normal operating mode.<br />

The controller is ready to operate.<br />

Now enter the required set point of<br />

20.0 bar by using the and<br />

keys.<br />

Parameter Description Default Customer<br />

Value set Values<br />

tune Tuning PID Stop Stop<br />

AdPt Adaptive tuning PID Stop Stop<br />

SL. u Set point ramp up Off Off<br />

SL. d Set point ramp down Off Off<br />

S.P. L Set point low limit 0.0 0.0<br />

S.P. H Set point high limit 50.0 25.0<br />

A2hy Alarm 2 hysteresis 0.5 0.5<br />

A2L.b Alarm 2 latching and blocking none Ltch<br />

A3hy Alarm 3 hysteresis 0.5 0.5<br />

A3L.b Alarm 3 latching and blocking none none<br />

t.F iL Time constant input filter Off Off<br />

In.Sh Input shift Off Off<br />

d.Err Error dead band Off Off<br />

St.OP Soft start output value Off Off<br />

Sa.OP Control output high limit 0.0 0.0<br />

To improve control of the application,<br />

adjust the proportional band and<br />

integral time accordingly.<br />

42<br />

IM-P323-25 CH Issue 3

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