0010456_A1
ABNOX Temperature Controller AXTR-xxxxxx-xxxxx
Page 57 of 84
5.3.2 Limit Monitoring
One alarm output for excess and one alarm output for insufficient temperature have been pre-configured. They
were set at
± 1 [°C]
from the currently set desired value (
SP1
). In order to prevent malfunctions from broken
cables, a permanent signal is transferred to the superordinate control unit. If the preset value at the Temperature
Controller is exceeded or fallen short by 1°C, the individual alarm output drops as a signal for the superordinate
control unit (Signal at LOW). The alarm signal is turned off (Signal at HIGH) once the set value range has been
reached again. If the currently measured, actual temperature is within the preset tolerance range of ± 1 [°C],
HIGH will be indicated for both alarm outputs.
The hysteresis (HySt) for error signal is factory-set at ±1 [°C] symmetrically to the limit value of the insufficient
temperature (UT) or excess temperature (OT). If the temperature rises or falls back into these limits, the respec-
tive signal will be given. Please refer to
Figure 5
for the signal curves of the two alarm outlets.
Signal at alarm output 1
Used for issuing an
error signal
for insufficient temperature
(deviation AL -1°C to set value
SP1)
Signal at alarm output 2
Used for issuing an
error signal
for excess temperature
(devia-
tion AL +1°C to set value SP1)
Figure 13:
Signal curves of the alarm outlets.
1
0
SP1
Temp.
AL
HySt
UT
1
0
SP1
Temp.
AL
HySt
OT
