Programming Set And Reset Points; Setting Fail-Safe Operation; Programming Time Delay; Relay Action For Loss Of 4-20 Ma Input (Loop Break) - FlowLine DataView LI55 Instruction Manual

DataView™ LI55 Level Controller

Programming Set and Reset Points

High alarm indication: program set point above reset point.
Low alarm indication: program set point below reset point.
The deadband is determined by the difference between set and reset points.
Minimum deadband is one display count. If the set and reset points are
programmed with the same value, the relay will reset one count below the set
point.
Note: Changes are not saved until the reset point has been accepted.

Setting Fail-Safe Operation

In fail-safe mode of operation, the relay coil is energized when the process
variable is within safe limits and the relay coil is de-energized when the alarm
condition exists. The fail-safe operation is set independently for each relay.
Select on to enable or select off to disable fail-safe operation.

Programming Time Delay

The On and Off time delays may be programmed for each relay between 0 and
999.9 seconds. The relays will transfer only after the condition has been
maintained for the corresponding time delay.
The On time delay is associated with the set point.
The Off time delay is associated with the reset point.

Relay Action for Loss of 4-20 mA Input (Loop Break)

The loop break feature is associated with the 4-20 mA input. Each relay may be
programmed to go to one of the following conditions when the meter detects the
loss of the input signal (i.e. < 0.005 mA):
1. Turn On (Go to alarm condition)
2. Turn Off (Go to non-alarm condition)
3. Ignore (Processed as a low signal condition)
Note: This is not a true loop break condition; if the signal drops below 0.005 mA,
it is interpreted as a "loop break" condition.
54
ENTER
UP
ENTER
Instruction Manual
MN301033 Rev B1