PR Elecronics 9116 Handbuch Seite 55

signal and sensor error information via display front 4501
Sensor error (see limits in the table) is displayed as SE.BR (sensor break) or
SE.SH (sensor short). Signals outside the selected range (not sensor error,
see table for limits) are displayed as IN.LO indicating low input signal or IN.HI
indicating high input signal. The error indication is displayed as text in line 1
and at the same time the backlight flashes. Line 4 of the display is a status
line which shows whether the device is SIL-locked (static dot = SIL-locked
and flashing dot = not SIL-locked) as well as relay status and COM (running
circle) indicating correct functioning of 4501.
signal and sensor error indication without display front
Status of the unit can also be read from the 3 LEDs in the front of the device.
Green flashing LED indicates normal operation.
No light in the green LED indicates lack of supply voltage or error in the device.
Steady red LED indicates fatal error.
Flashing red LED indicates sensor error.
Relay functions
5 different settings of relay function can be selected.
setpoint:
Window:
Error function: The relay is activated by sensor error.
Power:
off:
increasing/decreasing: The relay can be set to activate at increasing or
decreasing input signal.
Delay: An ON and an OFF delay can be set in the range 0...3600 s.
hysteresis: A hysteresis can be set at 0.1...25% of the span or between 1 and
25% of display range.
Window: The window function is selected by choosing "window" in the menu
and defining a high and a low setpoint.
See the graphic depiction of the window functions on page 62.
setpoint: The setpoint function is selected by choosing "setpoint" in the menu
and entering the desired limit. The device then works as a single limit switch.
See the graphic depiction of the window functions on page 63.
The unit works as a single trip amplifier
The relay has a window that is defined by a low and a high set -
point. On both sides of the window the relay has the same status.
The relay is activated as long as the power is on.
The relay is deactivated.
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