Alarm Types - Omron E5AR-T User Manual

Section 4 Settings Required for Basic Control

■ Alarm Types

4-38
Set value
Alarm type
0
Alarm function OFF
∗1
1 Upper-and lower-limit alarm
2
Upper-limit alarm
3
Lower-limit alarm
Upper-and lower-limit
∗1
4
range alarm
Upper-and lower-limit alarm
∗1, ∗6
5
with standby sequence
Upper-limit alarm
∗6
6
with standby sequence
Lower-limit alarm
7
with standby sequence
8
Absolute-value upper-limit alarm
9
Absolute-value lower-limit alarm
Absolute-value upper-limit alarm
∗6
10
with standby sequence
Absolute-value lower-limit alarm
∗6
11
with standby sequence
∗1: Set values 1, 4, and 5: Allow upper and lower limits of alarm to
be separately set. The upper and lower limits are indicated by L and H.
∗2: Set value 1: Upper-and lower-limit alarm
Case 1 Case 2
SP
L H SP
H < 0, L > 0 H > 0, L < 0
l H l < l L l l H l > l L l
∗3: Set value 4: Upper-and lower-limit range
Case 1 Case 2
L H SP SP
H < 0, L > 0 H > 0, L < 0
∗4: Set value 5: Alarm with upper-limit and lower-limit with standby sequence
∗With the above upper-and lower-limit alarms
• Cases 1 and 2:
If hysteresis overlaps the upper
and lower limits, always OFF.
∗5: Set value 5: Alarm with upper-and lower-limit standby sequence
If hysteresis overlaps the upper and lower limits, always OFF.
∗6: For information on standby sequences, refer to 5.6 Alarm Adjustment
Functions .
Under the following conditions, the SP of segment 1 is used as the SP
for deviation alarms.
• If the Operation at Reset parameter is set to stop control and the
program is reset in Program SP Mode
Alarm output function
Alarm value (X) is positive
L H
ON
OFF
SP
ON
OFF
SP
X
ON
OFF
SP
L H
ON
OFF
SP
L H
ON
∗5 OFF
SP
ON
OFF
SP
X
ON
OFF
SP
X
ON
OFF
0
X
ON
OFF
0
X
ON
OFF
0
X
ON
OFF
0
Case 3 (always ON)
H < 0, L < 0
H SP L
L H
H < 0, L > 0
l H l > l L l
H L SP
H > 0, L < 0
l H l < l L l
SP H L
Case 3 (always OFF)
H SP L
L H
H < 0, L > 0
H L SP
H > 0, L < 0
SP H L
• Case 3: Always OFF.
SP = Set point
Alarm value (X) is negative
Output OFF
∗2
X
X
ON
OFF
SP
X
ON
OFF
SP
∗3
∗4
X
X
ON
OFF
SP
X
ON
OFF
SP
X
ON
OFF
0
X
ON
OFF
0
X
ON
OFF
0
X
ON
OFF
0
=
=
H < 0, L < 0
l H l > l L l
=
l H l < l L l
=