JUMO 902931 Wtrans Receiver with Wireless Data Transmission Operating Manual - Manual (Page 75)

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9 Term definition
Alarm type 1/2 (xx.A1m/xx.A2m)
Figure 32: Setting the alarm functions
High alarm (HiAL)
An alarm is issued when the positive limit value is exceeded (after the alarm delay time has
elapsed), not taking the hysteresis into account (see Figure 32, item 1).
Reset conditions: return to a value below the positive limit value minus hysteresis.
Low alarm (LoAL)
An alarm is issued when the negative limit value is not met (after the alarm delay time has
elapsed), not taking the hysteresis into account (see Figure 32, item 3).
Reset conditions: return to a value above the negative limit value plus hysteresis.
Limit value alarm 1/2 (xx.A1L/xx.A2L)
The limit value for the selected alarm type 1 and 2 is set here (see Figure 32, item 4 and item 6).
Hysteresis (xx.HYS)
The hysteresis is the difference between the set limit value alarms. 1 or 2 is always set as a
positive value for the Max. alarm and Min. alarm (see Figure 32, item 5).
Alarm delay (xx.ALd)
This parameter is used to suppress short-term faults (see Figure 32, item 2). The alarm signal
is activated only after the set time has elapsed if there is still a limit value overrange or under-
range.
TIP!
The alarms can be configured as a window function (min/max) or as pre-alarm or main alarm
(min/min or max/max).