Minor alarm L-ALM Signal
If “98: L-ALM (Minor alarm)” is allocated to Output Terminal [DO1] Function Selection
(3005Hex-15Hex) and Output Terminal [ROA, ROB] Function Selection (3005Hex-1CHex), the mi-
nor alarm “L-ALM” signal is output when the cause of a minor alarm occurs.
Parameter No. Function name Data
Default da-
ta
Unit
3005Hex-15Hex/
3005Hex-1CHex
Output Terminal [DO1] Func-
tion Selection/Output Terminal
[ROA, ROB] Function Selec-
tion
98: L-ALM (Minor alarm) - -
8-8-24
Input Phase Loss Protection / Output Phase Loss Protection
By setting Input Phase Loss Protection Function Selection (3052Hex-0CHex) and Output Phase Loss
Protection Function Selection (3052Hex-0DHex), it is possible to set whether to continue with the op-
eration or trip the inverter when an input loss or output loss is detected.
Parameter No. Function name Data Default data Unit
3052Hex-0CHex
Input Phase Loss Protection
Function Selection
0: Disable (Continue to run)
1: Enable (T
rip)
- -
3052Hex-0DHex
Output Phase Loss Protection
Function Selection
• Input phase loss protection
If excessive stress is generated on the main circuit devices as a result of the loss of the three-phase
power supply input to the inverter or the unbalance between phases, it is detected and the input loss
protection function (alarm code: 0B) is activated.
If the load to be connected is light and a DC reactor has been connected, the stress on the main
circuit devices is low
. Therefore, even if there is an input loss or an unbalance between phases, the
loss may not be detected.
• Output phase loss protection
If an output loss is detected during the inverter operation, the output loss protection function (alarm
code: 0B) is activated.
In a configuration where an electromagnetic contactor is connected at the output side, if the electro-
magnetic contactor turns OFF during operation, the current of all phases becomes zero. In such a
case, the output loss protection function is not activated.
8-8-25
Integrated power clear (KHC)
When the KHC terminal is turned ON, the integrated power is cleared to zero. Integrating operation is
not performed while this terminal command is ON. T
o resume integrating operation, turn the KHC ter-
minal OFF
.
Parameter No. Function name Data Default data Unit
3005Hex-02Hex to
3005Hex-06Hex,
3005Hex-63Hex,
3005Hex-64Hex
Input Terminal [DI1] to [DI7]
Function Selection
164: KHC (Integrated power
clear)
- -
8 Other Functions
8-98
M1 Series EtherCAT Type User’s Manual (I670)
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