Alternate Duty Assist - Siemens HydroRanger 200 HMI Operating Instructions Manual

Alternate Duty Assist

2.8.1.4. Relay Function = Alternate Duty Assist alternates the lead pump each time the
material level cycles and runs all pumps together.
Relay operation
2.8. 1 .11. Relay Logic
(for
The setpoints associated with the relays are grouped so that they can be rotated.
Setpoint 1 does not relate directly to Relay 1. The pumping algorithm manages the
mapping of setpoints to relays.
When pumps are run, they RUN in parallel.
Relay table
Cycle 1 Relays
ON 3
ON 2
ON 1
OFF
Cycle 2 Relays
ON 3
ON 2
ON 1
OFF
Cycle 3 Relays
ON 3
ON 2
ON 1
OFF
Alternate Duty Backup
2.8.1.4. Relay Function = Alternate Duty Backup alternates the lead pump each time the
material level cycles.
Relay operation
2.8. 1 .11. Relay Logic
(for
The setpoints associated with the relays are grouped so that they can be rotated.
Setpoint 1 does not relate directly to Relay 1. The pumping algorithm manages the
mapping of setpoints to relays. When pumps are run, they can RUN only one at a time.
Page 250 HydroRanger 200 HMI – OPERATING INSTRUCTIONS
= Positive)
1 2
ON ON ON
ON ON OFF
ON OFF OFF
OFF OFF OFF
1 2
ON ON ON
OFF ON ON
OFF ON OFF
OFF OFF OFF
1 2
ON ON ON
ON OFF ON
OFF OFF ON
OFF OFF OFF
= Positive)
3
3
3
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