Fixed Duty Assist; Fixed Duty Backup - Siemens HydroRanger 200 HMI Operating Instructions Manual

Pump control reference
B.5 Fixed Duty Assist
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) =
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.
B.6

Fixed Duty Backup

Relay function (2.8.1.4.) (Page 195) =
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.
314
Index
ON 3
Setpoints
ON 2
ON 1
OFF
Fixed Duty Assist ties the indexed pump relay directly
1
ON
ON
ON
OFF
Fixed Duty Backup ties the indexed pump relay
.
Operating Instructions, 06/2018, A5E36281317-AC
Relays
2 3
ON ON
ON OFF
OFF OFF
OFF OFF
HydroRanger 200 HMI