72
Standard version
Highly functional version
Detection
range
10% of the rated voltage and rated
current or higher
30% of the rated current or higher
Number of
heaters
Up to 20, the same material and
capacity
Up to 10, the same material and
capacity
Number of
disconnecte
d heaters
It is possible to detect disconnection
when multiple heaters are
disconnected.
※
The amount of change may
exceed the detection range
depending on the usage
condition, resulting in
detection failure.
Disconnection of a single heater can
be detected normally.
※
The function may fail to detect
disconnection or the feedback
control may fail to operate
normally when multiple heaters
are disconnected.
Heater disconnection detection (standard version)
(1)
The load current and load voltage are obtained via the main circuit CT, external CT,
external PT, and conversion board.
(2)
The load current (%) and load voltage (%) in the early phase of operation are memorized.
(3)
The resistance when the heater load capacity is set is calculated using the memorized load
current and voltage.
(4)
The resistance is calculated periodically during operation using the load current and load
voltage.
(5)
When the amount of change in the resistance exceeds the preset heater disconnection
detection amount, the error code is displayed and a signal is output on the external warning
relay specified with [F6: Error output destination selection]. The unit continues operation,
instead of stopping.
(6)
For malfunction prevention, the heater disconnection detection is not performed when the
load voltage is less than 10% of the rated voltage.
(7)
For false detection prevention, the heater disconnection detection is not performed for 5
minutes after the start of operation.
Summary of Contents for CALPOTE UG Series
Page 94: ...94 APPENDIX B PANEL TRANSITION DIAGRAM...
Page 96: ...MEMO...
