Siemens SITRANS L 7ML5400 Operating Instructions Manual page 191

OFF Setpoint Pump 2 (2.7.1.9.)
The level at which Pump 2 turns OFF, defined in Units (2.1.1.) (Page 172).
Values
This parameter is set according to level even when another reading, such as volume, is
shown on the LCD.
Service Ratio Pump 1 (2.7.1.10.)
Selects pump usage based on the RUN time ratio rather than last used. (See Run Time Relay 2
(3.2.7.1.) (Page 248).)
Values
This parameter only relates to relays with Pump Control Mode (2.7.1.4.) (Page 189) set to
Service Ratio Duty Assist or Service Ratio Duty Backup.
The number assigned to each pump relay represents the ratio applied to decide the next
pump to start or stop.
Note
• The SITRANS LUT400 will not sacrifice other pumping strategies to ensure that the ratio is
held true.
• If the pump relays are set to the same value then the ratio equals 1:1 and all pumps are
used equally (default).
Service Ratio Pump 2 (2.7.1.11.)
Selects pump usage based on the RUN time ratio rather than last used. (See Run Time Relay 3
(3.2.7.2.) (Page 248).)
Values
This parameter only relates to relays with Pump Control Mode (2.7.1.4.) (Page 189) set to
Service Ratio Duty Assist or Service Ratio Duty Backup.
The number assigned to each pump relay represents the ratio applied to decide the next
pump to start or stop.
Note
• The SITRANS LUT400 will not sacrifice other pumping strategies to ensure that the ratio is
held true.
• If the pump relays are set to the same value then the ratio equals 1:1 and all pumps are
used equally (default).
SITRANS LUT400
Operating Instructions, 04/2021, A5E33329501-AG
Parameter reference (LUI)
Range: 0.000 to 99999.000
Default: 0.000
Range: 0 to 255
Default: 1
Range: 0 to 255
Default: 1
9.2 Setup (2.)
191