ero electronic LDS Manuel De Service page 18

is configured only.
Ranges:
- From P2 to P3 for process alarm.
- From 0 to 500 units for band alarm.
- From -199 to 500 units for deviation
alarm.
HSA Alarm hysteresis (in % of P3 - P2 span)
This parameters is present if the alarm
is configured only.
Range:From 0.1% to 10.0% of the input
span or 1 LSD.
Note: If the hysteresis of a band alarm is Note Note Note Note
larger than the alarm band, the
instrument will use an hysteresis value
equal to the alarm band minus 1 digit.
Pb Proportional band (in % of P3 - P2 span)
Range: : : : : from 1.0 % to 99.9 % of span for
heating output.
From 1.5 % to 99.9 % of span for
heating/cooling output (LHS).
When PB parameter is set to 0, the
instrument performs an ON-OFF control;
the ti, td, C, C2, rC, OLP, OLH and tOL
parameters are skipped and SMART
function is disabled.
HS Hysteresis for ON/OFF control action (in
% of P3 - P2 span)
This paameter is available only when
Pb=0.
Range: from 0.1% to 10.0% of the input
span.
ti Integral time (in minutes and seconds
[mm.ss]). This parameter is skipped if
Pb=0 (ON/OFF action).
Range: from 00.1 to 20.0 [mm.ss].
Above this value the display blanks and
integral action is excluded
td Derivative time (in minutes and seconds
[mm.ss]). This parameter is skipped if
lxs-1-0f.pmd 14
Pb=0 (ON/OFF action).
Range: from 1 s to 9 min. and 59 s; if 0 is
set, the derivative action is excluded.
I P Integral pre-loadThis parameter is
skipped when PB = 0.
Range:
- from 0 to 100% for one control output
- from -100 to 100% for two control
outputs (LHS only).
C Output 1 (heating) cycle time (in
seconds)
This parameter is present if PB
parameter is different from 0 only.
Range:From 1 to 200 s.
C2 Output 2 (cooling cycle time (LHS only)
This parameter is available only if P5=5.
Range:From 1 to 200 s.
rC Relative Cooling gain (LHS only).
This parameter is present if P5 = 5 and
PB parameter is different from 0 only.
Range: from 0.20 to 1.00
OLP Dead band/Overlap between H/C outputs
(LHS only).
This parameter is present if P5 = 5 and PB
parameter is different from 0 only.
Range: from -20 to 50 % of the
proportional band.
A negative OLAP value shows a dead
band while a positive value shows an
overlap.
rL Set point low limit (in eng. units).
Range: from min. range value (P2) to rH.
Note: When P2 has been modified, rL Note Note Note Note
will be realigned to it.
rH Set point high limit (in eng. units).
Range:from rL to full scale value (P3).
Note: When P3 has been modified, rH Note Note Note Note
will be realigned to it
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16/01/2004, 9.29