Event code Event name Description Assumed cause
Level
Reference
Min Obs Info
087A0000 hex Overcurrent
Protection
(During De-
celeration)
Overcurrent occurred
during deceleration.
(1) The inverter output is
short-circuited.
√
page
A-223
(2) There is a ground fault on
the inverter output.
(3) The load is large.
(4) The torque boost is large
(when 1st Torque Boost
Selection
(301F-0D hex) or
2nd Torque Boost Selection
(301F-0E hex) = 0).
(5) The acceleration/decelera-
tion time is short.
(6) Short-circuit detection was
activated by the built-in brak-
ing transistor (22 kW or less).
(7) The inverter malfunctioned
due to noise.
087B0000 hex Overcurrent
Protection
(During Con-
stant Speed)
Overcurrent occurred
during constant
speed.
(1) The inverter output is
short-circuited.
√
page
A-226
(2) There is a ground fault on
the inverter output.
(3) The load is large.
(4) The torque boost is large
(when 1st T
orque Boost
Selection
(301F-0D hex) or
2nd Torque Boost Selection
(301F-0E hex) = 0).
(5) The acceleration/decelera-
tion time is short.
(6) Short-circuit detection was
activated by the built-in brak-
ing transistor (22 kW or less).
(7) The inverter malfunctioned
due to noise.
Appendices
A-207
M1 Series EtherCAT Type User’s Manual (I670)
A-5 Sysmac Error Status Codes
A
A-5-1 Error List
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