27
GB
ERROR MESSAGES
OVERRANGE, UNDERRANGE AND
SENSOR LEADS BREAK INDICATIONS
The device is capable to detect a fault on the
process variable (OVERRANGE or
UNDERRANGE or SENSOR LEADS BREAK).
When the process variable exceeds the span
limits established by configuration parameter P 1
an OVERRANGE condition will be shown on
display as shown in the following figure:
An UNDERRANGE condition will be shown on
display as shown in the following figure:
When P41 is different from zero and an out of
range condition is detected, the instrument
operates in accordance with P41 and P42
parameters.
When P41 is equal to 0 (standard effect) and time
proportional outputs are configured, the following
conditions may occur:
- The instrument is set for one output only and an
OVERRANGE is detected, the OUT 1 turns OFF
(if reverse action) or ON (if direct action).
- The instrument is set for heating/cooling action
and an OVERRANGE is detected, OUT 1 turns
OFF and OUT 3 turns ON.
- From -100% to 100% when the device
is configured with two control outputs.
TOL
Time duration of the output power
limiter
This parameter is not available when
P5 =
SM.CL
or
SM.OL
Range: from 1 to 540 min.Above this
value the display shows “
INF
” meaning
that the limiting action is always on
Note: The
TOL
can be modified but the
new value will become operative only at
the next instrument start up.
RMP
Control output max. rate of rise
This parameter is available when Pb is
different from zero.
Range: from 0.1 to 25.0 %/s.Above this
value the display shows “
INF
” meaning
that no ramp limitation is imposed.
F.CAL
see "Feedback potentiometer calibration".
POS.L
see "Feedback potentiometer calibration"
FB.LC
see "Feedback potentiometer calibration"
POS.H
see "Feedback potentiometer calibra-
tion"
FB.HC
see "Feedback potentiometer calibration"
LFS-servo-1-02.p65
1/14/02, 3:44 PM
27
