D521-Manual_EN_Rev07 2017_05_26
Page 20 of 31
LED off
Relay de-energized
Legend
:
LED on
Relay energized
Alarm SP1
variable < SP
variable > SP
variable < SP
State of relay and LED,
if parameter
"Relay state at n > SP " = 0
State of relay and LED,
if parameter
"Relay state at n > SP " = 1
Example: Alarm SP1 as Setpoint with hysteresis "below"
alarm on
Variable
alarm off
time
setpoint SP1
setpoint - hysteresis
