Omega Engineering PSW32 SERIES User Manual page 6

Switching Characteristic Graphs
Signal "on" with rising pressure
Setting SP* > RP**
p
SP
RP
t
U
t
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".
Position of operating elements
Switching point button
Reset point button
Signal "on" with falling pressure
Setting SP < RP
p
RP
SP
t
U
A
t
E
R R O R
Display of hardware errors or malfunctions
Display
O.Er
Pressure display
E.Er
Switching
I.Er
function graph
Switching output LED
C.Er
Raise switching
or reset point button
SC.L
Lower switching
or reset point button
UFL
OFL
Display of hardware errors or malfunctions (can be switched off)
Display
SC.H
U.Lo
Messages generated by calling SETUP functions
Cod
CLC
txx
OFS
SC.H
U. LO
OFF
Std
HYS
FEn
U-C
I-C
Signal "off" with rising pressure
Setting RP > SP
p
RP
SP
U
M
E S S A G E S
Meaning Cause / Remedy
Output error Error at switching output: Circuit-breaker defective, feedback loop
to processor open circuit. Repair necessary.
E 2 PROM error E 2 PROM module defective or connection to processor faulty.
Repair necessary.
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.
Calibration error Checksum of calibration data incorrect. Recalibration necessary.
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).
Underflow The applied pressure is below the measuring range:
Increase pressure until it is within the measuring range.
Overflow The applied pressure is above the measuring range:
Decrease pressure until it is within the measuring range.
Meaning Cause / Remedy
Short-circuit high Short-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:
Voltage low Power supply voltage too low (<17V).
Check power supply: Load may be too large.
Disconnection:
Meaning Requested code or code programming
Clear code Deletion of current code
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.
Offset Request for offset adjustment using
Short-circuit high Short-circuit monitoring activated
Voltage low Voltage monitoring activated
Off Short-circuit or voltage monitoring deactivated
Standard mode Standard mode activated
Hysteresis mode Hysteresis mode activated
Window mode Window mode activated
Voltage calibration Voltage output selected
Current calibration Current output selected
Signal "off" with falling pressure
Setting RP < SP
p
SP
RP
t
U
A
t
during display test, then adjust with
during display test, then adjust with
and buttons
t
* SP = Switching point
t
**RP = Reset point
or .
or .