Autonics TM Series, User Manual

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6 Parameter Settings and Functions
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6.4.10.1 Heater Disconnection Detection SV
Set the alarm output value (Alarm Low_Ch) as the reference value for heater burnout
detection.
Group Parameter Range
Factory
Default
Unit
Alarm Setting Group Alarm Low_CH 0.0 ~ 50.0 0.0 A
Set to 00.0 for OFF. Set to 50.0 for ON.

Setting value calculation
: Heater burnout setting value = {(normal heater current values) +
(heater burnout current)}/2
If using a single output heater (Capacity: 200 VAC, 1 KW, 5 A), normal
heater current is 5 A, and burnout heater current is 0 A, the setting value
is calculated as (5 A + 0 A)/2 = 2.5 A. Therefore, heater current values
less than 2.5 A (heater burnout setting value) will be deemed heater
burnout and the alarm will activate.
When two output heaters (Capacity: 200 VAC, 1 KW, 5 A) are used,
normal heater current is 10 A (5 A X 2 EA). If a single heater burns out,
the heater current becomes 5A. The setting value is calculated as (10 A
+ 5 A)/2 = 7.5 A). Heater current values of less than 7.5 A (heater
burnout setting value) are deemed heater burnout and the alarm
activates.