Omron E5CN-HT User Manual page 95

Alarm Outputs
Set value Alarm type
14 Remote SP absolute
value upper limit (See
note 6.)
15 Remote SP absolute
value lower limit (See
note 6.)
Note
Alarm output operation
When alarm value X When alarm value X
is positive
X
ON
ON
OFF
OFF
0
X
ON
ON
OFF
OFF
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 Case 2
SP L H
L H SP
H < 0, L > 0 H > 0, L < 0
|H| < |L| |H| > |L|
(3) Set value: 4 (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 the 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 with standby sequence)
• The alarm is always OFF if upper- and lower-limit hysteresis overlaps.
(6) Displayed when remote SP input is used.
(7) For information on how standby sequences operate, refer to 4-2-2 Stand-
by Sequence.
(8) Refer to 4-11-1 Loop Burnout Alarm (LBA).
(9) Refer to PV Change Rate Alarm on page 75.
• Set the alarm type independently for each alarm in the Alarm 1 to 3 Type
parameters in the initial setting level. The default is 2 (Upper-limit alarm).
• When the Reset Operation parameter is set to stop control and operation
being reset in Program SP Mode or operation is on standby, the applica-
ble SP for a deviation alarm (alarm type 1 to 7) is the SP for segment 0.
• With rate of rise programming, if the Reset Operation parameter is set to
stop control and the Segment Type parameter of segment 0 is set to
Soak, the applicable SP for a deviation alarm (alarm type 1 to 7) is the PV.
is negative
This alarm type turns ON the
X
alarm when the remote SP (RSP)
0
is higher than the alarm value (X).
It also functions in Program SP
Mode, Fixed SP Mode, and
Remote SP Mode.
This alarm type turns ON the
X
alarm when the remote SP (RSP)
0
is lower than the alarm value (X).
It also functions in Program SP
Mode, Fixed SP Mode, and
Remote SP Mode.
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|
SP H L
Section 3-9
Function
73