Omron E5CN User Manual page 83

Alarm Outputs
Note
58
Set value Alarm type
3 Lower-limit
4 (See note Upper- and lower-limit
1.) range
5 (See note Upper- and lower-limit
1.) with standby sequence
6 Upper-limit with standby
sequence
7 Lower-limit with standby
sequence
8 Absolute-value upper-
limit
9 Absolute-value lower-limit
10 Absolute-value upper-
limit with standby
sequence
11 Absolute-value lower-limit
with standby sequence
12 LBA (alarm 1 type only)
13 PV change rate alarm
(1) With set values 1, 4, and 5, the upper- and lower-limit values can be set
independently for each alarm type, and are expressed as "L" and "H."
(2) Set value: 1 (Upper- and lower-limit alarm)
Case 1 Case 2
SP L H
L H SP
H < 0, L > 0 H > 0, L < 0
|H| < |L| |H| > |L|
(3) Set value: 4 (Lower limit range)
Case 1 Case 2
L H SP SP L H
H < 0, L > 0 H > 0, L < 0
|H| < |L|
|H| > |L|
(4) Set value: 5 (Upper- and lower-limit with standby sequence)
• For the lower-limit alarms in cases 1 and 2 above, the alarm is always
OFF if upper- and lower-limit hysteresis overlaps.
• In case 3, the alarm is always OFF.
(5) Set value: 5 (Upper- and lower-limit with standby sequence)
• The alarm is always OFF if upper- and lower-limit hysteresis overlaps.
Alarm output operation
When alarm value X
is positive
X
ON
OFF
SP
L H
ON
OFF
SP
L H
ON
OFF
SP
See note 5.
X
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
H < 0, L > 0
|H| ≥ |L|
H L SP
H > 0, L < 0
|H| ≤ |L|
SP H L
Case 3 (Always OFF)
H < 0, L < 0
H SP L
H < 0, L > 0
|H| ≥ |L|
H L SP
H > 0, L < 0
|H| ≤ |L|
SP H L
Section 3-9
When alarm value X
is negative
X
ON
OFF
SP
See note 3.
See note 4.
X
ON
OFF
SP
X
ON
OFF
SP
X
ON
OFF
0
X
ON
OFF
0
X
ON
OFF
0
X
ON
OFF
0