ero electronic LFS - Operative Parameters: Control Actions; Proportional Band, Integral, and Derivative Times

25
GB
AL3 Alarm 3 threshold
This parameter is available only if P 11 is
equal to "AL3.P", "AL3.B" or "AL3.D" and
P13 = OPRT or SPEC.
For range details see AL1parameter.
When P13 = SPEC, it allows to select one
of the two values programmed by P14
and P15 parameters.
HSA3 Alarm 3 hysteresis
This parameter is available only if P 11 is
equal to "AL3.P", "AL3.B" or "AL3.D" and
P13 = OPRT.
For other details see HSA1parameter.
Note: the alarm 2 and 3 are in OR
condition on the OUT 4.
PB Proportional band
Range: from 1.0% to 200.0% of the input
span. When Pb parameter is set to zero,
the control action becomes ON-OFF.
Note: When device is working with
SMART algorithm the Pb value will be
limited by P34 and P35 parameters.
HYS Hysteresis for ON/OFF control action
This paameter is available only when
Pb=0.
Range: from 0.1% to 10.0% of the input
span.
TI Integral time
This parameter is skipped if Pb=0 (ON/
OFF action).
Range: from 0.0 to 10.0 [mm.ss]. Above
this value the display blanks and integral
action is excluded
Note: When the device is working with
SMART algorithm, the minimum value of
the integral time will be limited by P36
parameter.
TD Derivative time
This parameter is skipped if Pb=0 (ON/
OFF action).
Range:From 00.00 to 10.00 mm.ss.
Notes:
1)When device is working with SMART
algorithm the td value will be equal to a
quarter of Ti value.
2)When P44 is equal to "PI", the
derivative action is always excluded.
IP Integral pre-load
This parameter is skipped if Pb=0 (ON/
OFF action).
Ranges:
- From 0.0 to 100.0 % of the output if
device is configured with one control
output.
- From -100.0% to 100.0% of the output if
device is configured with two control
outputs.
SM.TT Servomotor travel time
This parameter is available only when
P5 = Sm.OL.
Range: from 0.25 to 3.00 [mm.ss].
SM.DB Servomotor dead band .
This parameter is available only when
P5 = Sm.CL or Sm.OL and Pb is different from
0.
Range: from 1% to 50 % of the travel
timo or of the feedback potentiometer
span
SM.LL Servomotor low limit.
This parameter is available only when
P5 = Sm.CL
Range: from 0 (in % of the feedback
potentiometer span) to Sm.HL.
LFS-servo-1-02.p65 1/14/02, 3:44 PM25