Omron E5CC User Manual page 245

Set
value
17
18
19
*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 < 0, L > 0
|H| < |L|
*3 Set value: 4 (Upper- and lower-limit range)
Case 1
L
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 6-62 for information on the operation of the standby
sequence.
*7 Refer to 5-11-1 Loop Burnout Alarm (LBA).
*8 Refer to PV Change Rate Alarm on page 4-35.
E5@C Digital Temperature Controllers User's Manual (H174)
Alarm type
When alarm value
X is positive
MV absolute-value Standard Control
*9
lower-limit alarm
ON
OFF
Heating/Cooling
Control (Cooling
MV)
ON
OFF
RSP absolute-value
ON
*10
upper-limit alarm
OFF
000
RSP absolute-value
ON
*10
lower-limit alarm
OFF
000
Case 2
H SP SP L H
H > 0, L < 0
|H| > |L|
Case 2
H SP 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 (Cooling
MV)
Always ON
X
MV
0
X X
ON
RSP OFF
0 0
X X
ON
RSP OFF
0 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
6 Parameters
Description of function
This alarm type turns ON
the alarm when the
manipulated variable (MV)
MV
is lower than the alarm
value (X).
This alarm type turns ON
the alarm when the remote
RSP
SP (RSP) is higher than the
alarm value (X).
This alarm type turns ON
the alarm when the remote
RSP
SP (RSP) is lower than the
alarm value (X).
|H| ≤ |L|
6
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