Omron E5ZN - Page 48

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Alarm Outputs Section 3-8
2. Operation for set value 1 (upper and lower limit alarms) would be as follows:
3. Operation for set value 4 (upper and lower limit ranges) would be as follows:
4. Set value 5 (upper and lower limit alarms with standby sequence):
For upper and lower limit alarm cases in the above diagram, hysteresis is always
OFF for cases 1 and 2 if the upper and lower limits overlap. Hysteresis is always
OFF for case 3.
5. Set value 5 (upper and lower limit alarms with standby sequence):
Hysteresis is always OFF
if the upper and lower limits overlap.
6. Refer to 4-2 Alarm Hysteresis for information on standby sequences.
Alarm 3
L
H
SP
L
H
SP
SP
L
H
SP
L
H
SP
L
H
Case 1 Case 2 Case 3
H < 0, L > 0
|H| < |L|
H > 0, L < 0
|H| > |L|
H < 0, L < 0
H < 0, L > 0
|H| > |L|
H > 0, L < 0
|H| < |L|
SPL H
SP L H
SP LH
SP
L
H
SP
L
H
Case 1 Case 2 Case 3
H < 0, L > 0 H > 0, L < 0
H < 0, L < 0
H < 0, L > 0
|H| > |L|
H > 0, L < 0
|H| < |L|
Set value Alarm type Alarm output operation
When alarm value
X is positive
When alarm value
X is negative
0 Alarm function OFF Output OFF
1 upper and lower limit (devia-
tion)
Always ON.
2 Upper limit (deviation)
3 Lower limit (deviation)
4 Upper and lower limit range
(deviation)
Always OFF.
5 Upper and lower limit alarm
with standby sequence (devi-
ation)
Always OFF.
6 Upper limit alarm with
standby sequence (deviation)
7 Lower limit alarm with
standby sequence (deviation)
ON
OFF
X
X
SP
X
SP
ON
OFF
SP
ON
OFF
X
X
SP
ON
OFF
SP
ON
OFF
X
X
X
SP
ON
OFF
ON
OFF
X
X
SP
X
SP
ON
OFF
SP
ON
OFF
X
X
SP
ON
OFF
SP
ON
OFF
X