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4 Basic Operation
E5@C-T Digital Temperature Controllers User’s Manual (H185)
4-10 Alarm Outputs
4
4-10-2 Alarm Values
z SP Alarms
You can set an SP absolute-value upper-limit or SP absolute-value lower-limit alarm for the set point
(SP).
The alarm point is set in the corresponding alarm value parameter. The Alarm SP Selection
parameter is used to specify the alarm for either the ramp SP or the target SP.
The corresponding alarm hysteresis setting is also valid.
z MV Alarms
You can set an MV absolute-value upper-limit or MV absolute-value lower-limit alarm for the
manipulated value (MV).
The alarm point is set in the corresponding alarm value parameter. The corresponding alarm
hysteresis setting is also valid.
SP absolute-value upper-limit alarm SP absolute-value lower-limit alarm
The alarm output is ON while the SP is equal to or
higher than the set value.
The alarm output is ON while the SP is equal to or
lower than the set value.
MV absolute-value upper-limit alarm MV absolute-value lower-limit alarm
The alarm output is ON while the MV is equal to or
higher than the set value.
The alarm output is ON while the MV is equal to or
lower than the set value.
ON
OFF
0
SP
Upper-limit alarm
point (e.g., 100°C)
Alarm value (e.g., 100°C)
Example:
ON
OFF
0
SP
Lower-limit alarm
point (e.g., 100°C)
Example:
Alarm value (e.g., 100°C)
ON
OFF
0
MV
Upper-limit alarm
point (e.g., 80%)
Alarm value (e.g., 80%)
Example for Standard Control:
ON
OFF
0
MV
Lower-limit alarm
point (e.g., 20%)
Example for Standard Control:
Alarm value (e.g., 20%)