Siemens HydroRanger 200 - Pump Setpoint Modifiers (P121 and P122) [6 Relay Model]

Page 138 HydroRanger 200 – INSTRUCTION MANUAL 7ML19985FC03
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Parameters
Positive Logic
In software, all relays are programmed the same way, with ON setpoints indicating when
to change the relay contact state (open or closed). This parameter allows the reversal of
the operation so that relay contacts can be NORMALLY CLOSED or NORMALLY OPEN.
P118 is preset to 2 which is positive logic.
Negative Logic
When P118 = 3 (negative logic), the operation for the indexed relay is reversed from
normal.
P119 Relay Logic Test
Forces the relay control logic into an ACTIVATED or DE-ACTIVATED state.
This parameter tests site wiring and control logic programming. Forcing the relay to an
activated or de-activated state is similar to the HydroRanger 200 detecting an event and
responding to it. Helpful in testing new installations and diagnosing control problems.
Pump Setpoint Modifiers (P121 and P122)
[6 relay model]
Please note that these parameters apply to the HydroRanger 200 6 relay model only.
These parameters provide alternate ways of starting the pumps in the pump group. See
the
Pump Control section on page 56 for descriptions of the pump control algorithms.
P121 Pump by Rate [6 relay model]
Sets the pump relays to accept control by rate of level change once the first ON setpoint
is reached.
Primary Index Relay
Values
0 * OFF - Control from HydroRanger 200 algorithms
1 Activate relay control
2 De-activate relay control
Related
• P111 Relay Control Function
• P910 Toggle Relays
Primary Index
Single Point Model Dual Point Model
Transducer Level
Values
0 * OFF (pump by level)
1ON (pump by rate)
Related
•P007 Span
• P111 Relay Control Function
•P132 Pump Start Delay
• Rate (P700 to P708)