Alarms/Alarm Outputs; Alarm 1/Output 1; Alarm 1 Off/On - Phoenix Contact MCR-FL-D-U-I-2SP-24 Bedienungsanleitung

5.5 Alarms/Alarm outputs

One, two or no alarms can be active.
When exceeding Signal on
Alarm 1 Output 1
Alarm 2 Outout 2
5.5.1 Alarm 1/Alarm output 1

5.5.1.1 Alarm 1 off/on

Menu <–> Selection
Example: on
Alarm 1 not active
Alarm 1 active
press the key to accept the selection
5.5.1.2 Assign Alarm 1
Menu <–> Selection
Assignment
Totalizer
instantaneous value
press the key to accept the selection
5.5.1.3 Mode for Alarm output 1
Menu <–> Selection
Latch mode, Latch signal reset at output 1
➱
Chapter 5.5.1.5
Auto mode
press the key to accept the selection
Alarm a: threshold exceeded
b: below threshold
Output mode "Auto": automatic resetting of output when the
signal falls below threshold, signal set to 0, LED extinguished.
Output mode "Latch": Manual and/or electrical resetting
of signal and LED
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LED display
on
on
➱
Chapter 5.5.2 23
The limit value can be assigned either to
the totalizer value or the current
measured value.
22
5.5.1.4 Alarm 1 Hysteresis
Here hysteresis means: The difference in
thresholds between switching on and
switching off. This difference should be
selected large enough to avoid undesired
switching actions at the output due to the
variations of the current instantaneous
For positive alarm value:
Switching on hysteresis
Current
Positive
value
alarm
Output
Switching on value = alarm + switching on hysteresis ∆a
Switching off value = alarm – switching off hysteresis ∆b
The switching on value must be greater than the switching off value.
For negative alarm value:
Negative
Current
alarm
value
Switching on
hysteresis
Output
Switching on value = alarm – switching on hysteresis ∆a
Switching off value = alarm + switching off hysteresis ∆b
The switching on absolute value (numerical value without sign)
must be greater than the absolute value for switching off.
value.
Note:
Alarm value and hysteresis are always
based on the displayed current value and
not on the input signal value.
Switching off hysteresis
Switching off
hysteresis
Page 21