Alarm Outputs - Omron E5CN Datasheet

Alarm Outputs

Each alarm can be independently set to one of the following 13 alarm types. The default is 2: Upper limit.
Auxiliary outputs are allocated for alarms. ON delays and OFF delays (0 to 999 s) can also be specified.
Note: For models with heater burnout, SSR failure, and heater overcurrent detection, alarm 1 will be an OR output of the alarm selected from the
following alarm types and the alarms for heater burnout, SSR failure, and heater overcurrent. To output only a heater burnout alarm, SSR
failure alarm, and heater overcurrent alarm for alarm 1, set the alarm type to 0 (i.e., no alarm function).
Set
Alarm type
value
Alarm function
0 Output OFF
OFF
1 Upper- and lower-
ON
✽1
limit OFF
ON
2 Upper limit
OFF
ON
3 Lower limit
OFF
Upper- and lower-
4
ON
✽1
limit range OFF
Upper- and lower-
ON
5
limit with standby
OFF
✽1
✽5
sequence
Upper-limit with
ON
6
standby sequence OFF
Lower-limit with
ON
7
standby sequence OFF
Absolute-value
ON
8
OFF
upper-limit
Absolute-value
ON
9
lower-limit OFF
Absolute-value
ON
10 upper-limit with
OFF
standby sequence
Absolute-value
ON
11 lower-limit with
OFF
standby sequence
LBA
12 ---
(for alarm 1 only)
PV change rate
13 ---
alarm
8
Basic-type Digital Temperature Controller
Alarm output operation
When X is When X is
positive negative
L H
✽2
SP
X X
ON
OFF
SP SP
X X
ON
OFF
SP SP
L H
✽3
SP
L H
✽4
SP
X X
ON
OFF
SP SP
X X
ON
OFF
SP SP
X X
ON
OFF
0 0
X X
ON
OFF
0 0
X X
ON
OFF
0 0
X X
ON
OFF
0 0
✽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
L H SP
H < 0, L > 0
H < L
✽3. Set value: 4, Upper- and lower-limit range
Case 1
L H SP
H < 0, L > 0
H < L
✽4. Set value: 5, Upper- and lower-limit with standby sequence
For Upper- and Lower-Limit Alarm Described Above
• Case 1 and 2
Always OFF when the upper-limit and lower-limit hysteresis
overlaps.
• Case 3: Always OFF
✽5. Set value: 5, Upper- and lower-limit with standby sequence
Always OFF when the upper-limit and lower-limit hysteresis
overlaps.
E5CN/E5CN-U
Case 2
Case 3 (Always ON)
H SP L
SP L H
H > 0, L < 0
H L SP
H > L
SP H L
Case 3 (Always OFF)
Case 2
H SP L
SP L H
H > 0, L < 0
H L SP
H > L
SP H L
H < 0, L < 0
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