Super Systems 7EK 31081 - Manual (Page 28)

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rL Set point low limit (in eng. units).
Range: from min. range value (P3) to rH.
Note: When P3 has been modified, rL will be
realigned to it
rH Set point high limit (in eng. units).
Range:from rL to full scale value (P4)
Note: When P4 has been modified, rH will be
realigned to it
Grd1 Ramp applied to an increasing set point
changes
Range:
From 1 to 100 digits per minute.
Above this value the display shows “Inf”
meaning that the transfer will be done as a step
change.
Grd2 Ramp applied to a decreasing set point
changes
For other details see Grd1 parameter.
OLH Output high limit
Range:
- From 0.0 to 100.0% of the output when device
is configured with one control output.
- From -100.0 to 100.0% of the output when
device is configured with two control outputs.
tOL Time duration of the output power limiter
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.
rñP Control output max. rate of rise (in percent
per second).
This parameter is available when Pb is different
from zero or one control output is linear.
Range: from 0.1%/s to 25.0 %/s.Above 25.0 %/
s the display shows “InF” meaning that no ramp
limitation is imposed.
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 show
in the following figure:
An UNDERRANGE condition will be shown on display as
shown in the following figure:
When P42 is equal to 0, the following conditions may
occur:
- The instrument is set for one output only and an
OVERRANGE is detected, the OUT turns OFF (if
reverse action) or ON (if direct action).
- The instrument is set for heating/cooling action and an
OVERRANGE is detected, OUT "rEV" turns OFF and
OUT "dir" turns ON.
- The instrument is set for one output only and an
UNDERRANGE is detected, the OUT turns ON (if
reverse action) or OFF (if direct action).
- The instrument is set for heating/cooling action and an
UNDERRANGE is detected, OUT "rEV" turns ON and
OUT "dir" turns OFF.
When P42 is different from zero and an out of range
condition is detected, the instrument operates in
accordance with P42 and P43 parameters.
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