Error Descriptions
Event name Overcurrent Protection (During Acceleration) Event code 08790000 hex
Meaning Overcurrent occurred during acceleration.
Source EtherCAT Master Function Mod-
ule
Source details Slave Detection tim-
ing
Continuously
Error attrib-
utes
Level Minor fault Recovery Error reset Log category System log
Effects User program Continues. Operation Motor stops.
Indicators EtherCAT NET RUN EtherCAT NET ERR EtherCAT LINK/ACT
--- --- ---
System-de-
fined varia-
bles
Variable Data type Name
None None None
Cause and
correction
Assumed cause Correction Prevention
(1) The inverter output is short-
circuited.
Disconnect the wires from the in-
verter output terminals (U, V
, and
W) and measure the phase-to-
phase resistance of the motor
wires. Check that there are no
wires with extremely low phase-
to-phase resistance.
→ Remove the short-circuit.
(This includes wire, relay termi-
nal, and motor replacement.)
If overcurrent is indicated when
the inverter is operating with the
wires disconnected from the in-
verter output terminals (U, V
, and
W)
→ There is a possibility of an in-
verter failure.
Confirm that the motor cables
are not broken and connect them
correctly.
(2) There is a ground fault on the
inverter output.
Disconnect the wires from the in-
verter output terminals (U, V, and
W) and perform a megger test.
→ Remove the ground fault.
(This includes wire, relay termi-
nal, and motor replacement.)
If overcurrent is indicated when
the inverter is operating with the
wires disconnected from the in-
verter output terminals (U, V
, and
W)
→ There is a possibility of an in-
verter failure.
Confirm that the motor cables
are not broken and connect them
correctly.
Appendices
A-220
M1 Series EtherCAT Type User’s Manual (I670)
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