Siemens SITRANS LUT400 - Page 77

Commissioning
6.3 Quick Start Wizards
SITRANS LUT400
Operating Instructions, 07/2019, A5E33329501-AC
75
Number of Pumps
Select the number of pumps to be used with pump control.
Options
NONE, 2
Default: NONE
If set to NONE, pump control is disabled.
Options
NONE, 2
Default: NONE
If set to NONE, pump control is disabled.
Relay Pump 1
Selects the relay assigned to Pump 1.
Options
RELAY 2, RELAY 3
Default: RELAY 2
Relay Pump 2 View only.
Automatically sets the relay assigned to Pump 2 based on relay selected for Pump 1 in
previous step.
Options
(View Only)
If Relay Pump 1 = RELAY 2, then Relay Pump 2 = RELAY 3
If Relay Pump 1 = RELAY 3, then Relay Pump 2 = RELAY 2
Pump Control Mode
Sets the control algorithm used to trip the relay.
Options sup-
ported per
model
LUT420 Level Controller:
ALTERNATE DUTY ASSIST, ALTERNATE DUTY BACKUP
LUT430 Pump and Flow Controller:
ALTERNATE DUTY ASSIST, ALTERNATE DUTY BACKUP, SERVICE RATIO
DUTY ASSIST, SERVICE RATIO DUTY BACKUP, FIXED DUTY ASSIST, FIXED
DUTY BACKUP
LUT440 High Accuracy OCM:
ALTERNATE DUTY ASSIST, ALTERNATE DUTY BACKUP, SERVICE RATIO
DUTY ASSIST, SERVICE RATIO DUTY BACKUP, FIXED DUTY ASSIST, FIXED
DUTY BACKUP
Default (all models): ALTERNATE DUTY ASSIST
See Pump Control Mode (Page 185) 2.7.1.4. for descriptions of each.
Service Ratio Pump 1
Selects pump usage based on the RUN time ratio rather than last used.
Value
Range: 0 to 255
Default: 1