19
Operating Parameters
From the “normal operating mode,” press the FUNC key.
The lower display will show the code while the upper
display shows the setting or the status (ON or OFF) of
the selected parameter.
Press the s or t key to change the setting.
Press the FUNC key again and the instrument stores the
new setting and goes to the next parameter.
Some of the following parameters may not appear,
depending on the configuration.
Param Description
SP Main setpoint. Range rL to rH.
n.rS Manual reset of alarms. Available only when
one alarm with manual reset has been
programmed. Set ON, and push the FUNC
key to reset the alarms.
nnn Software key for parameter protection. This
parameter is skipped if P18 = 0 or 1. The
instrument shows the safety key status:
ON = instrument is in LOCK condition;
OFF = instrumet is in UNLOCK condition.
To switch from LOCK to UNLOCK condition,
set a value equal to P18 parameter. To switch
from UNLOCK to LOCK condition, set a value
different from P18 parameter.
A1 Alarm 1 setpoint value. This parameter is
present if alarm 1 is configured only. Ranges:
•P2 to P3 for process alarm
•0 to 500 units for band alarm
•-199 to 500 units for deviation alarm.
A2 Alarm 2 setpoint value. For other details see
A1 parameter.
H1 Alarm 1 hysteresis. This parameter is present
if alarm 1 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 larger
than the alarm band, the instrument will use
a hysteresis value equal to the programmed
band minus 1 digit.
H2 Alarm 2 hysteresis. For other details see H1
parameter.
Pb Proportional band. Ranges:
•1.0% to 99.9% of span for heating output
•1.5% to 99.9% of span for heating/cooling
output
When Pb parameter is set to 0, the instrument
performs an on-off control; the ti, td, IP, C,
C2, rC, OLP, OLH and tOL parameters are
skipped, and SMART AT function is disabled.
Note: when SMART AT is enabled, the Pb
parameter range is limited by P27, P28 and
P29 parameters.
HS Hysteresis for on-off control action. 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 00.1 to
20.0 (mm.s). Above this value the display
blanks and integral action is excluded. When
SMART AT is enabled, the minimum value of
the integral time is limited by P30 parameter.
td Derivative time. This parameter is skipped if
Pb = 0 (on-off action). Range from 0.01 to
9.59 (m.ss). Setting the 0 value the derivative
action is excluded. When SMART AT is
enabled, the derivative time value will be
equal to 1/4 of the integral time.
IP Integral pre-load. This parameter is skipped
if Pb = 0 (on-off action). Ranges:
• 0 to 100% when P4 = H
•-100 to 100% when P4 = HC
C Output 1 cycle time. Available if Pb
parameters is different from 0 only. Range
from 1 to 200 s.
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