PR electronics 5111 Mode D'emploi page 25

DISMANTLING
When changing the DIP-switch settings, it is necessary to demount the printed
circuit board. The front cover is removed by inserting a small screwdriver in the
upper front hole and tipping the cover carefully off. The circuit board incl. con-
nectors can be pulled out of the enclosure by detaching the lock - the upper DIN
rail fastener - and carefully pulling out the circuit board.
CABLE COMPENSATION 2-WIRE RTD INPUT
When "external calibration" is enabled from PReset, it is possible to compensate
for cable resistance in 2-wire RTD input in the following way:
1. Short-circuit RTD.
2. Demount the front cover and activate sw. 1.
3. Remove short circuit on RTD.
PRetrans 5111 compensates for the actual cable resistance. The function may
be disabled from PReset.
PROCESS CALIBRATION 0% AND 100% OR ONLY 0%
(not for RTD and TC input).
When option "Front programming" is actively configured in PReset it is possible
to make the following process calibrations according to the actual selection in
PReset.
Please note: Input 0% and 100% should be chosen higher than the process-
calibrated span.
0% AND 100% PROCESS CALIBRATION:
1. Apply the actual 0% value.
2. Demount the front cover and activate sw. 1 and wait
until the LED turns off.
3. Apply the actual 100% value.
4. Activate sw. 1. The LED will flash on and off again.
PRetrans 5111's input is now scaled according to the actual process values.
0% PROCESS CALIBRATION:
1. Apply the actual 0% value.
2. Demount the front cover and activate sw. 1 twice
within 5 s. LED will flash on and off again.
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No power supply:
Power on
Please note: Power must
remain off for min. 5 s to get a
correct startup.
Warm start reset due to:
Power failure or watchdog
time-out.
EEprom data error:
Sensor error at input:
Lin R, Pt100, TC, and 4...20 mA.
Hardware error:
Constant reset because of
EEprom, A/D converter or
micropro ces sor error.
Hardware error:
Constant reset because of
short-circuited crystal.
ERROR FUNCTIONS:
Status indication
Green LED off.
Relays off.
Analogue output 0 mA / 0 V.
: Green LED flashes at 5...20 Hz.
Relays acc. to input value.
Analogue output acc. to input value.
Green LED is permanently on until new
power on.
Relays are off for 1 s, then acc. to input value.
Analogue output -23 mA / -1.2 V / -11.5 V
for max. 1 s, then acc. to input value.
Green LED off.
Relays off.
Analogue output 0 mA / 0 V.
Green LED flashes at 5...20 Hz.
Relays acc. to configuration at sensor error.
Analogue output acc. to configuration at
sensor error.
Green LED flashes at about 1 Hz.
Relays off.
Analogue output -23 mA / -1.2 V / -11.5 V.
Green LED flashes with about 1 Hz.
Relays change between off status for 1 s
and previous status.
Analogue output -23 mA / -1.2 V / -11.5 V.
Action
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