JUMO 701550 di 308 - Digital Indicator Operating Manual - Manual (Page 49)

49
7 Configuration
Switching
action
Switching action means: limit comparator reaction to
a limit value or setpoint value change as well as to
Power ON.
„absolute“ switching action:
At the time of the change, the limit comparator reacts
according to its function.
„relative“ switching action:
Following Power ON, the limit comparator remains in
its „OFF“ switch position, even if the process value is
within the switch-on range.
If the setpoint value or the limit value is altered while
the limit comparator is in its „OFF“ position, which
leads to the actual value now being in the switch-on
range, the limit comparator still remains in the „OFF“
switch position.
The limit comparator will only resume operation
according to its function when the process value is
outside of the switch-on range. In other words: it
remains „OFF“ until the process value has again
reached the switch-on range.
See the following example: