Omron E5*D series User Manual page 286

6 Parameters
Set
value
16
17
*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 alarm with standby sequence)
• For the upper- and 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 alarm with standby sequence)
• The alarm is always OFF if upper- and lower-limit hysteresis overlaps.
*6 Refer to Standby Sequence Reset on page 6-65 for information on the operation of the standby
sequence.
*7 Refer to 5-15-1 Loop Burnout Alarm (LBA).
*8 Refer to PV Change Rate Alarm on page 4-35.
6 - 52
Alarm type
When alarm value
X is positive
MV absolute-value Standard Control
*9
upper-limit alarm
ON
OFF
Heating/Cooling
Control (Heating
MV)
ON
OFF
MV absolute-value Standard Control
*9
lower-limit alarm
ON
OFF
Heating/Cooling
Control (Cooling
MV)
ON
OFF
Case 2
SP L H
H > 0, L < 0
|H| > |L|
Case 2
SP L H
H > 0, L < 0
|H| > |L|
Alarm output operation
When alarm value
X is negative
Standard Control
X X
ON
MV OFF
0 0
Heating/Cooling
Control (Heating
MV)
Always ON
X
MV
0
Standard Control
X X
ON
MV OFF
0 0
Heating/Cooling
Control (Cooling
MV)
Always ON
X
MV
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
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
E5@D Digital Temperature Controllers User's Manual (H224)
Description of function
This alarm type turns ON
the alarm when the
manipulated variable (MV)
MV
is higher than the alarm
value (X).
This alarm type turns ON
the alarm when the
manipulated variable (MV)
MV
is lower than the alarm
value (X).
|H| ≤ |L|