Siemens sitrans LU01 - Manual (Page 49)

7ML19985BE02 SITRANS LU01 – INSTRUCTION MANUAL Page 43
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To reset the Relay Function to use Standard Alarms, enter the desired Relay Set Up
(P100).
Independent Relay Setpoints
Relay ON and OFF Setpoint values set the critical points (based on the Relay Function)
where, in RUN mode:
• Relay status indicators are switched ON and OFF
• Alarm Indicators (if programmed) are switched ON or OFF
• 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 (P006). 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.
Values For P111
Control Type #
1
1. When reading and setting this parameter through Modbus or SmartLinx
communications the parameter values are mapped to different numbers.
See the relevant SmartLinx manual for Modbus information.
Relay Control
General
Off 0 Relay set off, no action (preset)
Level 1* Based on level setpoints ON and OFF
In Bounds 2
When level enters the range between ON and OFF
setpoints
Out of Bounds 3
When level exits the range between ON and OFF set-
points
Rate of Change 4 Based on rate setpoints ON and OFF
Temperature 5 Based on temperature setpoints ON and OFF
Loss of Echo (LOE) 6 When echo is lost
Cable Fault 7 When the circuit to a transducer is opened
Pump Fixed Duty Assist 50
At fixed ON and OFF setpoints and allows multiple
pumps to run or for rake control