gefran GFX4-IR Configuration And Programming Manual

3180415F_MSW_GFX4-IR_05-2019_ENG
LBA ALARM (Loop Break Alarm)
This alarm identifies incorrect functioning of the control loop due to a possible load break or to a short circuited or
reversed probe.
With the alarm enabled (parameter AL.n), the instrument checks that in condition of maximum power delivered for
a settable time (Lb.t) greater than zero, the value of the process variable increases in heating or decreases in cooling: if this
does not happen, the LBA alarm trips. In these conditions, power is limited to value (Lb.P).
The alarm condition resets if the temperature increases in heating or decreases in cooling.
Enable alarm
195
AL.n
R/W
Select number of enabled alarms
119
Lb.p
R/W
Limitation of power delivered in
presence of LBA alarm
-100.0 ..100.0 %
8
bit
STATE of LBA
ALARM
OFF = LBA alarm off
ON = LBA alarm on
R
Read state
44
Lb.t
R/W
Delay time for tripping of LBA alarm
0.0 ... 500.0 min
FUNCTIONAL DIAGRAM
Enable alarm
(AL.n)
Delay time for tripping
(Lb.t)
State of LBA variable
Break in control
loop
See outputs
Limitation of power Lb.P
See Alarms
SBR-Err
81
bit
Reset LBA alarm
OFF = -
ON = LBA alarm reset
R/W
3
see: Table of enabled alarms
25.0
30.0
If Lb.t = 0, the LBA alarm is disabled

gefran GFX4-IR Specifications

General

Brand	gefran
Model	GFX4-IR
Category	Controller
Language	English