Omron E5 K-T -, Руководство пользователя, Страница: 31 / 44

E5
j
K-T E5
j
K-T
31
LBA
The LBA (loop break alarm) function is available when it is assigned
as an output. The LBA function is not available when a memory or
A/D converter error results.
LBA is a function for determining that an error has occurred some-
where on the control loop and outputting an alarm when the process
value does not change with the manipulated variable at a maximum
or minimum state. Accordingly, the LBA function can be used as a
means for detecting a malfunctioning control loop.
Alarm Mode Selectors
Alarm outputs are available if they are allocated as outputs. Factory setting is “2: Upper-limit alarm (deviation).”
Switch
setting
Alarm operation Alarm output
setting
When X is positive When X is negative
1 Upper- and lower-limit alarm (deviation)
X X
ON
OFF
SP
Always ON
2 Upper-limit alarm (deviation) X
SP
ON
OFF
X
SP
ON
OFF
3 Lower-limit alarm (deviation) X
SP
ON
OFF
X
SP
ON
OFF
4 Upper- and lower-limit range alarm (deviation) X X
SP
ON
OFF
Always OFF
5 Upper- and lower-limit alarm with standby
sequence (deviation) X X
SP
ON
OFF
Always OFF
6 Upper-limit alarm with standby sequence
(deviation)
X
SP
ON
OFF
X
SP
ON
OFF
7 Lower-limit alarm with standby sequence
(deviation)
X
SP
ON
OFF
X
SP
ON
OFF
8 Absolute-value upper-limit alarm
X
0
ON
OFF
0
X
ON
OFF
9 Absolute-value lower-limit alarm
X
0
ON
OFF
0
X
ON
OFF
10 Absolute-value upper-limit alarm with standby
sequence X
0
ON
OFF
0
X
ON
OFF
11 Absolute-value lower-limit alarm with standby
sequence
X
0
ON
OFF
0
X
ON
OFF
Deviation Alarm
If the alarm mode selector is set to a number between 1 to 7, alarm
values are set to the width deviated from the set point as shown in
the following illustration.
Set point (SP)
100
°
C/
°
F
Alarm value
10
°
C/
°
F
110
°
C/
°
F
Absolute Alarm
If the alarm mode selector is set to 8 or 9, alarm values are set to the
absolute value based on 0
°
C/
°
F as shown in the following illustra-
tion.
0
°
C/
°
F
Alarm value
110
°
C/
°
F
110
°
C/
°
F