To reset the Relay Function to use Standard Alarms, enter the desired Relay Set Up (P100).
values: 0 = off (relay always de-energized)
1 = level alarm (preset)
2 = in bounds alarm (not applicable to Point 3 differential level)
3 = out of bounds alarm (not applicable to Point 3 differential level)
4 = rate of change alarm (not applicable to Point 3 differential level)
5 = temperature alarm (Point Numbers 1 and 2 only)
6 = LOE alarm (Point Numbers 1 and 2 only, Relay A/B Setpoints are not applicable)
7 = transducer cable fault alarm
50 = pump control (non-sequenced)
Independent Relay Setpoints
Relay A and B Setpoint values set the critical points (based on the Relay Function) where, in the Run mode ...
1. Relay status indicators are switched "ON" and "OFF"
2. Alarm Indicators (if programmed) are switched "ON" or "OFF"
3. Relays are "energized" and "de-energized"
For most Relay Functions, setpoint values represent material levels, entered in Units (P005) or percent of
Span (P007) as referenced to Empty (P-006). Temperature alarm values are entered in degrees Celsius (°C).
Rate alarms are entered in Units / minute or percent of Span per minute. A positive value is entered for a
filling rate alarm; negative for emptying.
RELAY FUNCTION SETPOINTS
*
ACTION WHEN
A B Status Alarm Relay
Level H or HH 85% 70% On On de-energizes level rises to 85%
Off Off energizes level falls to 70%
Level L or LL 15% 30% On On de-energizes level falls to 15%
Off Off energizes level rises to 30%
In Bounds
▲
80% 50% On On de-energizes level falls to 78%
Off Off energizes level rises to 82%
On On de-energizes level rises to 52%
Off Off energizes level falls to 48%
Out of Bounds
▲
80% 50% Off Off energizes level falls to 78%
On On de-energizes level rises to 82%
Off Off energizes level rises to 52%
On On de-energizes level falls to 48%
Rate of Change +10% +5% Off Off de-energizes fill rate increases to 10%/min
On On energizes fill rate decreases to 5%/min
-10% -5% Off Off de-energizes empty rate increases to 10%/min
On On energizes empty rate decreases to 5%/min
Temperature 60 55 On On de-energizes temperature rises to 60 °C
Off Off energizes temperature falls to 55 °C
-30 -25 On On de-energizes temperature falls to -30 °C
Off Off energizes temperature rises to -25 °C
Pump 80% 20% On On energizes start pump down on level at 80%
Off Off de-energizes stop pump down on level at 20%
20% 80% On On energizes start pump up on level at 20%
Off Off de-energizes stop pump up on level at 80%
*
Values shown are for illustration purposes only. Enter values which apply to your particular installation.
▲
2% factory set hysterisis, adjustable via P116
PL-508 40
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