Alarm Outputs - Omron E5GN 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 value Alarm type
0 Alarm function OFF
*1
1 Upper- and lower-limit
2 Upper-limit
3 Lower-limit
*1
4 Upper- and lower-limit range
Upper- and lower-limit with
*1
5
standby sequence
6 Upper-limit with standby sequence
7 Lower-limit with standby sequence
8 Absolute-value upper-limit
9 Absolute-value lower-limit
Absolute-value upper-limit with
10
standby sequence
Absolute-value lower-limit with
11
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 2
Case 1
SP L H
L H SP
H < 0, L > 0 H > 0, L < 0
⏐H⏐ < ⏐L⏐ ⏐H⏐ > ⏐L⏐
*3.
Set value: 4, Upper- and 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 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
8
Basic type digital temperature controller
Alarm output operation
When alarm value
X is positive
Output OFF
L H
ON
OFF
SP
X
ON
OFF
SP
X
ON
OFF
SP
L H
ON
OFF
SP
L H
ON
OFF
SP
*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⏐
L
SP H
E5GN
When alarm value
X is negative
No alarm
Set the deviation in the set point by setting the alarm
*2
upper limit (H) and alarm lower limit (L).
X Set the upward deviation in the set point by setting
ON
the alarm value (X).
OFF
SP
X
Set the downward deviation in the set point by setting
ON
OFF the alarm value (X).
SP
Set the deviation in the set point by setting the alarm
*3
upper limit (H) and alarm lower limit (L).
A standby sequence is added to the upper- and
*4
lower-limit alarm (1).
X
A standby sequence is added to the upper-limit alarm
ON
*6
OFF (2).
SP
X
A standby sequence is added to the lower-limit alarm
ON
OFF *6
(3).
SP
X
The alarm will turn ON if the process value is larger
ON
OFF than the alarm value (X) regardless of the set point.
0
X
The alarm will turn ON if the process value is smaller
ON
OFF
than the alarm value (X) regardless of the set point.
0
X
A standby sequence is added to the absolute-value
ON
upper-limit alarm (8).
OFF
0
X
A standby sequence is added to the absolute-value
ON
OFF lower-limit alarm (9).
0
*7
---
*8
--- *
*5.
Set value: 5, Upper- and lower-limit with standby sequence
Always OFF when the upper-limit and lower-limit hysteresis overlaps.
*6.
Refer to the E5CN/E5AN/E5EN/E5GN Digital Temperature Controllers
User's Manual Basic Type (Cat. No. H156) for information on the operation
of the standby sequence.
*7.
Refer to the E5CN/E5AN/E5EN/E5GN Digital Temperature Controllers
User's Manual Basic Type (Cat. No. H156) for information on the loop
burnout alarm (LBA).
*8. Refer to the E5CN/E5AN/E5EN/E5GN Digital Temperature Controllers
User's Manual Basic Type (Cat. No. H156) for information on the PV change
rate alarm.
Description of function
*6
*6
*6