Heater Disconnection Alarm [ Hb-A ] - Autonics DPU Series User Manual

6. Parameter setting and functions
6.3.7

Heater disconnection alarm [ HB-A ]

When load resistance display method is set as [ UP ], it is over the set value, this alarm occurs.
[ H-BK ] and display value flashes for 2 sec. in turn in the display part and EVT indicator flashes for
0.5 sec.
Even though heater disconnect alarm occurs, control operation continues.
It is cleared automatically when the value is below the SV of heater disconnect alarm value.
(1) Heater disconnection alarm value setting [ HB-V ]
Regardless of control method (phase control, cycle control), it operates. For the operation, over
10% of control output (phase control, cycle control) and over 30% of rated current are required.
• Set range: 10 to 500 (unit: %)
Hysteresis of heater disconnect alarm is fixed as 1% for ON/OFF interval.
When SV for heater disconnect alarm is 50%, alarm turns ON at 50%, alarm turns OFF at 49%.
(2) Heater disconnection alarm delay time [ HB-T ]
When load resistance display method is set as [ DOWN ] and load resistance value is under the SV
of [ HB-V ], alarm disconnection alarm occurs after the set delay time.
• Set range: 0, 1, 2, 3, 5, 10, 20, 30 (unit: sec.)
44
ON
OFF
49% SV
50%
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