Switching Characteristic Graphs
Signal “on” with
rising
pressure
Setting SP* > RP**
Explanation:
When the switching point (SP) is adjusted
HIGHER
than the reset point (RP), then the switching output will be “normally off”.
When the switching point (SP) is adjusted
LOWER
than the reset point (RP), then the switching output will be “normally on”.
p
SP
RP
t
t
U
Signal “on” with
falling
pressure
Setting SP < RP
Signal “off” with
rising
pressure
Setting RP > SP
p
RP
SP
t
t
U
p
RP
SP
U
A
t
t
Signal “off” with
falling
pressure
Setting RP < SP
p
SP
RP
U
A
t
t
* SP = Switching point
**RP = Reset point
Pressure display
Switching
function graph
Switching output LED
Raise switching
or reset point button
Lower switching
or reset point button
Reset point button
Switching point button
Position of operating elements
Cod
Meaning
Requested code or code programming
CLC
Clear code
Deletion of current code
txx
Delay time
Setting of filter time constant
(Buffering time)
xx = Switching output delay
xx {03, 06, 12, 24, 50} in ms and
xx {O.1, 0.2, O.4} in s.
OFS
Offset
Request for offset adjustment using
▼
and
▲
buttons
SC.H
Shor t-circuit high
Shor t-circuit monitoring activated
U. LO
Voltage low
Voltage monitoring activated
OFF
Off
Shor t-circuit or voltage monitoring deactivated
Std
Standard mode
Standard mode activated
HYS
Hysteresis mode
Hysteresis mode activated
FEn
Window mode
Window mode activated
U-C
Voltage calibration
Voltage output selected
I-C
Current calibration
Current output selected
Display
Meaning
Cause / Remedy
SC.H
Shor t-circuit high Shor t-circuit between output and power supply. Check wiring.
If the switching line from the load (e.g. electrical control
device, PLC or similar) is being held at an open-circuit
potential of > 3V, or if several pressure switches are being
operated in parallel, this function should be switched off.
Disconnection:
▼
during display test, then adjust with
▼
or
▲
.
U.Lo
Voltage low
Power supply voltage too low (<17V).
Check power supply: Load may be too large.
Disconnection:
▲
during display test, then adjust with
▼
or
▲
.
E
R R O R
M
E S S A G E S
Display of hardware errors or malfunctions
Display of hardware errors or malfunctions (can be switched off)
Messages generated by calling SETUP functions
Display
Meaning
Cause / Remedy
O.Er
Output error
Error at switching output: Circuit-breaker defective, feedback loop
to processor open circuit. Repair necessary.
E.Er
E2PROM error
E2PROM module defective or connection to processor faulty.
Repair necessary.
I.Er
Initialization error
Checksum of initialization data incorrect. Remedy: Call up any
SETUP function and acknowledge the setting with SP.
This error message is caused by a data error. All setup values
should therefore be checked and corrected if necessary.
C.Er
Calibration error
Checksum of calibration data incorrect. Recalibration necessary.
SC.L
Short-circuit low
Short-circuit between output and ground. Check wiring:
Power supply may be too weak for connected load (leading
to collapse of voltage, particularly with loads with a high switch-on
current such as incandescent lamps or capacitances).
UFL
Underflow
The applied pressure is below the measuring range:
Increase pressure until it is within the measuring range.
OFL
Overflow
The applied pressure is above the measuring range:
Decrease pressure until it is within the measuring range.
