JUMO 705060 mTRON T - Multifunction Panel 840 Operating Manual - Manual (Page 152)

13 Configuration
152
Example of tolerance band being exceeded
The principle of the alarm corresponds to the alarm configuration of the individual analog chan-
nels.
Measured value (channel 1) = 21 °C
Measured value (channel 2) = 21 °C, tolerance band comparison is active.
Positive tolerance = 10 °C
Positive hysteresis = 2 °C
The alarm is generated if the current measured value (channel 2) is above 31 °C.
The alarm is deleted again if the current measured value (channel 2) falls below 29 °C.
Measured value (channel 1) = 21 °C
Measured value (channel 2) = 21 °C, tolerance band comparison is active.
Negative tolerance = -10 °C
Negative hysteresis = 2 °C
The alarm is generated if the current measured value (channel 2) is below 11 °C.
The alarm is deleted again if the current measured value (channel 2) rises above 13 °C.
NOTE!
The tolerance band comparison is only possible within the scaling limits. If there is a channel
that falls below or exceeds the range, this will result in both a min. and a max. alarm as with
all other functions (in this case, pos. tolerance and neg. tolerance).
(1) (2)
(3) (3)
1
0
(1) Negative alarm 1 Alarm on
(2) Positive alarm 0 Alarm off
(3) Hysteresis
NOTE!
In the example shown, channel 1 is constant and channel 2 changes its measured value. This
does not have to be the case. It can also be the case that channel 1 changes or even that
both channels change.