Siemens 200 P118 Relay Output Logic, Value Logic Alarm, Power Failure, Relay States, 4,5

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.

Actual ON or OFF setpoint

P116

Setpoint set in P112 or P113 P116

Actual OFF or ON setpoint

Parameters

P118 Relay Output Logic

The logic applied to relays to determine the contact open or closed state.

Primary Index Relay

	Value		Logic	Alarm	Pump or Control
				Contact	Contact
Values
	2	*	Positive	Normally Closed	Normally Open
	3		Negative	Normally Open	Normally Closed
Related	•	P111 Relay Control Function

The relay contact operation is NORMALLY CLOSED for alarms and NORMALLY OPEN for controls. See P111 Relay Control Function for more information.

Note: P118 is not reset by a master reset (P999).

Power Failure

When power is cut to the MultiRanger, its relays fail to the following states:

	Relay States
Relay		Fail State
1,2,4,5		Open
3,6		Open or Closed1

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 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.

Page 138 MultiRanger 100/200 – INSTRUCTION MANUAL 7ML19981FB06