6 Parameters
6 - 68
E5@C-T Digital Temperature Controllers User’s Manual (H185)
*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)
*3 Set value: 4 (Upper- and lower-limit range)
*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 6-83 for information on the operation of the standby
sequence.
*7 Refer to 5-10-1 Loop Burnout Alarm (LBA).
*8 Refer to PV Change Rate Alarm on page 4-60.
*9 When heating/cooling control is performed, the MV absolute-value upper-limit alarm functions only for
the heating operation and the MV absolute-value lower-limit alarm functions only for the cooling
operation.
• If the Controller is equipped with HB/HS alarm detection, the Alarm 1 Type is not displayed for the
default settings. To use alarm 1, set an output assignment to alarm 1. (Refer to 4-6-3 Assigned
Output Functions (Assigning Control Outputs Is Not Supported for Position-proportional Models.).)
17 MV absolute-value
lower-limit alarm
*9
Standard Control Standard Control This alarm type turns ON
the alarm when the
manipulated variable (MV)
is lower than the alarm
value (X).
Heating/Cooling
Control (Cooling
MV)
Heating/Cooling
Control (Cooling
MV)
Always ON
Set
value
Alarm type
Alarm output operation
Description of function
When alarm value
X is positive
When alarm value
X is negative
ON
OFF
0
X
MV
ON
OFF
0
X
MV
ON
OFF
0
X
MV
LHSP LHSP
H
LSP
H
LSP
H
LSP
H < 0, L > 0
|H| < |L|
H > 0, L < 0
|H| > |L|
H < 0, L < 0
H < 0, L > 0
|H| ≥ |L|
H > 0, L < 0
|H| ≤ |L|
Case 3 (Always ON)
Case 2
Case 1
LHSP
H
LSP
H
LSP
H
LSP
LHSP
H < 0, L > 0
|H| < |L|
H > 0, L < 0
|H| > |L|
H < 0, L < 0
H < 0, L > 0
|H| ≥ |L|
H > 0, L < 0
|H| ≤ |L|
Case 3 (Always OFF)
Case 2
Case 1
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