Siemens HydroRanger 200 HMI - Fixed Duty Assist

Pump control reference
B.5 Fixed Duty Assist
HydroRanger 200 HMI
314 Operating Instructions, 06/2018, A5E36281317-AC
Service Ratio
Starts pumps based on user-defined ratio of running time.
B.5
Fixed Duty Assist
Relay function (2.8.1.4.) (Page 195) = Fixed Duty Assist ties the indexed pump relay directly
to the indexed setpoint.
Relay operation
(for
Relay logic (2.8.1.11.) (Page 199)
= Positive)
The relay contact closes at the ON setpoint and opens at the OFF setpoint. Multiple relay
contacts in the pump group can be closed at the same time.
Relay table
The following table shows relay status when each setpoint is reached.
Relays
Setpoints
Index
1
2
3
ON 3 ON ON ON
ON 2
ON
ON
OFF
ON 1
ON
OFF
OFF
OFF
OFF
OFF
OFF
B.6
Fixed Duty Backup
Relay function (2.8.1.4.) (Page 195) = Fixed Duty Backup ties the indexed pump relay
directly to the indexed setpoint
.
Relay operation
(for
Relay logic (2.8.1.11.) (Page 199)
= Positive)
The relay contact closes at the ON setpoint and opens at the OFF setpoint. When a new
relay trips the previously closed relay contact opens to shut down the running pump.
Only one relay contact in the pump group can be closed at any one time.