Alarm Type (E5Ec) - Omron E5CC Manual

Alarm type
Each alarm can be independently set to one of the following 19 alarm types. The default is 2: Upper limit. (see note.)
Auxiliary outputs are allocated for alarms. ON delays and OFF delays (0 to 999 s) can also be specified.
Note: In the default settings for models with HB or HS alarms, alarm 1 is set to a heater alarm (HA) and the Alarm Type 1 parameter is not displayed.
To use alarm 1, set the output assignment to alarm 1.
Set
Alarm type
value
0 Alarm function OFF
1 Upper- and lower-limit *1
2 Upper-limit
3 Lower-limit
Upper- and lower-limit
4
range *1
Upper- and lower-limit with
5
standby sequence *1
Upper-limit with standby
6
sequence
Lower-limit with standby
7
sequence
8 Absolute-value upper-limit
9 Absolute-value lower-limit
Absolute-value upper-limit
10
with standby sequence
Absolute-value lower-limit
11
with standby sequence
12 LBA (alarm 1 type only)
13 PV change rate alarm
SP absolute value
14
upper limit
SP absolute value
15
lower limit
MV absolute value
16
upper limit *9
MV absolute value
17
lower limit *9
RSP absolute value
18
upper limit *10
RSP absolute value
19
lower limit *10
*1 With set values 1, 4 and 5, the upper and lower limit values can be set
ndependently 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|
Alarm output operation
When alarm value When alarm value
X is positive X is negative
Output OFF
L H
ON
*2
OFF PV
SP
X
ON
ON
OFF
OFF PV
SP
X
ON ON
OFF PV OFF
SP
L H
ON
*3
OFF PV
SP
L H
ON
*4
OFF PV
*5
SP
X
ON
ON
OFF PV
OFF
SP
X
ON
ON
OFF
OFF PV
SP
X
ON
ON
OFF PV OFF
0
X
ON ON
OFF PV OFF
0
X
ON ON
OFF PV OFF
0
X
ON ON
OFF PV OFF
0
-
-
X
ON ON
OFF SP OFF
0
X
ON ON
OFF
OFF SP
0
X
ON
ON
OFF
OFF MV
0
X
ON ON
OFF MV OFF
0
X
ON
ON
OFF
OFF RSP
0
X
ON ON
OFF RSP 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
SP H L |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
Description of function
No alarm
Set the deviation in the set point by setting the alarm upper
limit (H) and alarm lower limit (L). The alarm is ON when the
PV is outside this deviation range.
Set the upward deviation in the set point by setting the alarm
X
value (X). The alarm is ON when the PV is higher than the SP
PV
SP
by the deviation or more.
Set the downward deviation in the set point by setting the
X
alarm value (X). The alarm is ON when the PV is lower than
PV
SP
the SP by the deviation or more.
Set the deviation in the set point by setting the alarm upper
limit (H) and alarm lower limit (L).
The alarm is ON when the PV is inside this deviation range.
A standby sequence is added to the upper- and lower-limit
alarm (1).*6
X
A standby sequence is added to the upper-limit alarm (2). *6
PV
SP
X
A standby sequence is added to the lower-limit alarm (3).*6
PV
SP
X
The alarm will turn ON if the process value is larger than the
PV alarm value (X) regardless of the set point.
0
X
The alarm will turn ON if the process value is smaller than the
PV alarm value (X) regardless of the set point.
0
X
A standby sequence is added to the absolute-value upper-
PV limit alarm (8). *6
0
X A standby sequence is added to the absolute-value lower-limit
PV
alarm (9). *6
0
*7
*8
X This alarm type turns ON the alarm when the set point (SP) is
SP
higher than the alarm value (X).
0
X This alarm type turns ON the alarm when the set point (SP) is
SP
smaller than the alarm value (X).
0
X
This alarm type turns ON the alarm when the manipulated
MV
variable (MV) is higher than the alarm value (X).
0
X
This alarm type turns ON the alarm when the manipulated
MV variable (MV) is smaller than the alarm value (X).
0
X
The alarm will turn ON when the remote SP (RSP) is larger
RSP
than the alarm value (X).
0
X The alarm will turn ON when the remote SP (RSP) is smaller
RSP than the alarm value (X).
0
*4. Set value: 5, Upper- and lower-limit with standby sequence
For Upper- and Lower-Limit Alarm Described Above *2
• 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.
*6. Refer to the E5CC/E5EC Digital Controllers User's Manual (Cat. No. H174)
for information on the operation of the standby sequence.
*7. Refer to the E5CC/E5EC Digital Controllers User's Manual (Cat. No. H174)
for information on the PV change rate alarm.
*8. Refer to the E5CC/E5EC Digital Controllers User's Manual (Cat. No. H174)
for information on the PV change rate alarm.
*9. When heating/cooling control is performed, the MV absolute upper limit
alarm functions only for the heating operation and the MV absolute lower
limit alarm functions only for the cooling operation.
*10. This value is displayed only when a remote SP input is used. It functions in
both Local SP Mode and Remote SP Mode.
E5EC
21