4-86
Chapter 4. Functions
Short-circuit detection current value
If the measured current when output is OFF exceeds the setting, a short-circuit is
detected.
If the setting is 0.0, the detection function is stopped.
Note
• As a general guide, the set value should be midway between the normal current
value and the short-circuit current value. Also, set so that the difference between
the normal current value and short-circuit current value is 5 % FS or more of the
measurement current range.
CT input display range and current measurement range (p.4-82)
Short-circuit current + Normal current
Set value =
2
Hysteresis
Set the hysteresis common to heater burnout detection, overcurrent detection, and
short-circuit detection.
Delay time
Set the ON delay time common to heater burnout detection, overcurrent detection,
and short-circuit detection.
This delay timer is started and reset based on the conditions in the table below.
Detection type Start condition Reset condition
Heater burnout
detection
Current at output ON ≤ Heater burnout detection
current value
Current at output ON ＞ Heater burnout detection current value +
Hysteresis
Overcurrent
detection
Current at output ON ≥ Overcurrent detection current
value
Current at output ON ＜ Overcurrent detection current value −
Hysteresis
Short-circuit
detection
Current at output OFF ≥ Short-circuit detection
current value
Current at output OFF ＜ Short-circuit detection current value −
Hysteresis
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