Independent Relay Failsafe (P129) - Siemens HydroRanger 200 Instruction Manual

Use this function when multiple pumps are to be controlled by rate of level change rather
than by setpoints.
The delay between pump starts is set by P132 Pump Start Delay.
This only applies to any relays set to pump control (P111 = 50 to 56).
Notes:
• All pump control relay ON and OFF setpoints must be the same value
• If the level is within 5% of Span (P007) of the OFF setpoint, the next pump is not
started
P122 Pump Service Ratio [6 relay model]
Selects pump usage based on the RUN time ratio rather than last used.
Primary Index
Values
Related
This parameter only relates to relays with P111 = 54 or 55.
To make this parameter useful, assign it to all of the pump relays. The number assigned to
each pump relay represents the ratio applied to decide the next pump to start or stop.
Notes:
• The HydroRanger 200 will not sacrifice other pumping strategies to ensure that the
ratio is held true
• If the pump relays are set to the same value then the ratio equals 1:1 and all pumps
are used equally (preset)

Independent Relay Failsafe (P129)

P129 Relay Failsafe
Sets how individual relays react to a failsafe condition, to allow for more flexible
programming.
Primary Index
Values
Altered by
Use this for operations independent of the Failsafe Material Level (P071).
7ML19985FC03
Relay
Range: 0.000 to 9999
Preset: 20.00
• P111 Relay Control Function
Relay
OFF * Response governed by P071 Failsafe Material Level
HOLd For LAST KNOWN relay state retention
dE To have the relay de-energize immediately on failsafe
En To have the relay energize immediately on failsafe
• P071 Failsafe Material Level
• P070 Failsafe Timer
• P111 Relay Control Function
HydroRanger 200 – INSTRUCTION MANUAL Page 139