Technical data

TR440 12310-0702-04 Seite
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8.13 Configure the alarms
The following parameters are significant:
Alarm value
8FAN.8
8ALR.8
8tRP.8
8Cor.8
Limits for the alarms.
Dependent on the selected program, various alarm settings are
possible(see short operating diagrams)
Hysteresis
8H .8
Reset value is calculated from the alarm value + hysteresis, e.g.:
90°C (limit) + -5°C (hysteresis) = 85°C (reset value)
Alarm delay
on
8dal.8
An alarm is suppressed for the set time (seconds)
Alarm delay
off
8dof.8
An alarm is only switched off after the limit is fallen below (alarm value +
hysteresis) and this time (seconds) has expired.
Relay
8rel.8
Closed-circuit current 8 r.8: Relay is operating (attracted) in GOOD
state (= alarm value has not been reached) and releases when the alarm
value is reached.
Advantage: Errors and malfunctions generally lead to an alarm
Disadvantage: Alarm also when the control voltage is switched off.
Unfavourable, e.g., in transformers, especially when the TR440 control
voltage comes from the monitored transformer
Operating current 8 a.8: Relay has released in GOOD state and
operates (attracts) when the alarm value has been reached. No alarm
when the control voltage is switched off and during faults.
Closed-circuit current locked 8 Lr.8: Behaves as with zero signal
current, but an alarm remains active until it is reset with the Set/Reset
key (press ≥ 2s).
Operating current locked 8 LA.8: Behaves as with operating current,
but an alarm remains active until it is reset with the Set/Reset key (press
≥ 2s).
Error /
Malfunction
8Err.8
8rel.8 - 8 r.8 - 8 A.8 - 8 Lr.8 - 8 LA.8
Behaviour of the device during faults (sensor fault / device fault)
Involves Relay K4 (not in program 3)
Note: A locked alarm is not saved in the device zero-voltage maintained time.
That means that if the supply voltage is interrupted, a locked alarm can be reset.
Adjustment procedure (procedure as an example based on Alarm 8FAN.8]):
Select the menu item with the Up/Down key until …
Display 8FAN.8
Press the Set key
Display 8FAN.8 / 8100.8 flashes alternately (actual limit, value can be different)
Set the desired limit using the Up and Down keys
Press the Set key
Display 8H .8 / 8-20.8 (hysteresis / value) flash alternately
Set the desired hysteresis using the Up and Down keys
Press the Set key
Display 8dal.8 / 8 0.8 (delay alarm / value) flash alternately
Set the desired value with the Up and Down keys
Press the Set key
Display 8dof.8 / 8999.8 (delay alarm off / value) flash alternately