Siemens HydroRanger 200 Instruction Manual page 147

For IN-BOUNDS and OUT-OF-BOUNDS Relay Functions (P111 = 2 and 3 respectively), a
dead band prevents relay chatter due to material level fluctuations at both the upper and
lower setpoints.
Enter the dead band in either percent
of span or units of measure (P005).
The dead band value is applied both
above and below the upper and lower
bound setpoints as shown in the fig-
ure.
P118 Relay Output Logic
The logic applied to relays to determine the contact open or closed state.
Primary Index
Values
Related
The relay contact operation is NORMALLY CLOSED for alarms and NORMALLY OPEN for
controls. See P111
Note: P118 is not reset by a master reset (P999).
Power Failure
When power is cut to the HydroRanger 200, its relays fail to the following states:
1,2,4,5
1.
Relays 3 and 6 are Form C types, so you can wire it either
NORMALLY OPEN or NORMALLY CLOSED. Check the wiring
before programming.
To use relays 1, 3 or 6 as general alarm indicators, set P118 to 3 – negative logic and wire
the alarm for normally open operation. When an alarm event occurs (see below) or when
power is cut, the circuit closes and the alarm activates.
7ML19985FC03
Relay
Value Logic
2 * Positive
3 Negative
• P111 Relay Control Function
Relay Control Function
Relay States
Relay
3,6
HydroRanger 200 – INSTRUCTION MANUAL
Actual ON or OFF setpoint
P116
Setpoint set in P112 or P113
P116
Actual OFF or ON setpoint
Alarm
Contact
Normally Closed
Normally Open
for more information.
Fail State
Open
1
Open or Closed
Pump or Control
Contact
Normally Open
Normally Closed
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