Endress+Hauser RMA 421 - Page 63

Dependence between the switch threshold and
hysteresis on
MIN (minimum safety) and MAX (maximum
safety):
On minimum safety a set point infringement remains active as
long as the measured signal is smaller than the switch
threshold plus hysteresis (
SETP + HYST ), on maximum safety
the value of the switch threshold minus hysteresis (
SETP -
HYST ).
Parameter Setting up selections
Default
settings
Actual
setting
* Set point
SETP1 / SETP2
Enter the set point. Value:
-19999 to 99999
00
* Hysteresis
HYST1 / HYST2
Enter the set point
hysteresis on
min.-/maximum safety.
Value:
-19999 to 99999
00
* Reset threshold
RESP1 / RESP2
Enter the reset threshold
on trend monitoring.
Value:
-19999 to 99999
00
* Time delay
DELY1 / DELY2
Setting the limit event
time delay after reaching
the set point.
Value:
0 to 99s
The time delay can be set
up in 1s steps.
00
On alarm message the time delay is 0" !
À Relay deactivated (no power), yellow LED off
Measurement value
Measurement value
SETP
HYST
MIN
SETP
MAX
HYST
Process transmitter
61