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.