Operation of the self power management function
• This function controls the magnetic contactor (MC) on the input side using the output relay to reduce the standby power
during inverter stop. With the terminals R1/L11 and S1/L21 (refer to
69), the main circuit power supply and control circuit power supply are separated, and the MC for main circuit power
supply is controlled by the electronic bypass MC1 signal.
• Set Pr.248 Self power management selection = "1 or 2", Pr.30 Regenerative function selection ≠ "20, 21, 120, or 121"
(other than DC feeding mode 2), and Pr.190 to Pr.196 (Output terminal function selection) = "17 (positive logic)" to
assign the Electronic bypass MC1 (MC1) signal to an output terminal.
• After the inverter is stopped and the time set in Pr.11 DC injection brake operation time and Pr.254 Main circuit power
OFF waiting time have passed, turning OFF the MC1 signal releases the MC on the input side (main circuit power supply
OFF). Set Pr.254 to prevent frequent MC operation.
• Turning ON the start signal turns ON the MC1 signal and closes the MC on the input side (main circuit power supply ON).
After the time set in Pr.137 Start waiting time has passed, the inverter starts. Set time slightly longer (about 0.3 to 0.5 s)
than the time period from the MC1-ON to the actual pick-up operation of the MC is turned ON in Pr.137.
Power supply mode
Main circuit power supply
• When the protective function of the inverter is activated, the MC1 signal is immediately turned OFF according to the Pr.248
setting. (The MC1 signal is turned OFF before the time set in Pr.254 has passed.)
When Pr.248 ="1", the MC1 signal is turned OFF when the protective function is activated due to any cause.
When Pr.248 ="2", the MC1 signal is turned OFF only when the protective function is activated due to an error resulted
from a failure in the inverter circuit or a wiring error (refer to the following table). (For the fault details, refer to
Inrush current limit circuit fault (E.IOH)
CPU fault (E.CPU)
CPU fault (E.6)
CPU fault (E.7)
Parameter storage device fault (E.PE)
Parameter storage device fault (E.PE2)
24 VDC power fault (E.P24)
Operation panel power supply short circuit/RS-485 terminals power supply short circuit
Output side earth (ground) fault overcurrent (E.GF)
Output phase loss (E.LF)
Internal circuit fault (E.BE)
Internal circuit fault (E.13/E.PBT)
• To enable the self power management function for the separated converter type, enable the self power management
function also on the converter unit side. To activate the self power management function when a converter unit fault occurs,
connect the terminal to which the Y17 signal of the converter unit is assigned and the terminal to which X94 signal of the
inverter is assigned.
5.11 (A) Application parameters
external 24 V input
66) and 24 V external power supply input (refer