Lamtec LT 2 Assembly And Commissioning Manual page 47

4 Technical Description
Reset mode (param. 935/945/955/965)
Automatic:
Manual:
Acknowledge:
Trigger delay (param. 936/946/956/966)
Deactivation of limit value (param. 967)
If the limit value was enabled by the reference value being undershot or exceeded,
this parameter describes the mode for resetting the limit value. There are three
possible ways of doing this:
If the monitored reference value changes so that it reaches the GOOD state once
more, the limit value output is automatically reset.
The limit value must be reset manually via the display, via one of the digital inputs or
via the remote software. In this Reset mode, limit values can only be reset when the
monitored reference value has returned to the GOOD state
The limit value output must be reset manually via the display, via one of the digital
inputs (Reset LVx) or via the remote software. If the monitored reference value is still
outside the Good range, it is only acknowledged at first, and disappears on reaching
the Good state.
Each individual limit value can now be deactivated with the "Deact. LVx" function via
the digital inputs ( x = { 1, 2, 3, 4 } ).
This parameter allows you to set a trigger delay in a time range from 0 to 600
seconds. In this case, the limit value output is only enabled if the monitored reference
value remains outside the Min. LV or Max. LV range for longer than the pre-defined
time interval. Once the reference value has returned within the limits of Min. LV and
Max. LV, the time counter is reset. When the value goes beyond the Min. LV or Max.
LV value, the trigger delay starts counting again from the time 0.
All limit values can be deactivated together depending on the operating mode.
Possible settings: Limit values are deactivated in the following states
• 0=Never
• 1=Cold start (default)
• 2=Coldstart+maintenance
• 3=No measurement.
Faults and warnings have no influence on the limit values!
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