MHT258a (Engl.)7-7
(3) Alarm detection
The contents of current alarm can be displayed with codes. When [ ] is displayed, the alarm history can be displayed.
When an alarm is detected, the following indication will appear.
Major fault Minor fault
Indication Description Indication Description
No alarm (Figure above) Resistor heat (rH)
Overload (OL) Deviation excessive (OF)
Overspeed (OS) Amplifier overheat (AH)
Overvoltage (Hv) Absolute data lost (AL)
Encoder trouble (Et) Absolute data overflow (AF)
Encoder communication error (EC) Terminal error (tE)
Circuit trouble (Ct)
Memory error (dE)
Undervoltage (Lv)
Overcurrent (OC)
Combination error (CE)
Resistor heat 2
Cont (Control signal) error (CtE)
System error (SE)
Remarks : The alarm codes are indicated automatically. In alarm history, if of [ ＊＊＊] is flickering, the alarm has not reset yet.
On this indication, if the alarm detection is reset by the control input signal, the initial screen (system para. 89 setting) is
displayed. The reset of alarm detection can be carried out by trial operation mode [
].
Press the ∧key and ∨ key simultaneously for 1s or more while alarm detection is indicated to reset the alarm detection.
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