Maeda MK0003, Service Manual, Page: 318 / 348

5-24
Symptom Content of the likely cause Countermeasures
Reference
Unable to run/set
from the optional
unit
(communication
unit). The primary/secondary run command
selection (A002/A202) is incorrect. Set the primary/secondary run command selection
(A002/A202) to “04: optional unit”.
The primary/secondary frequency
command selection (A001/A201) is
incorrect. Set the primary/secondary frequency command
selection (A001/A201) to “04: optional unit”.
Incorrect address. Check that the index/sub index (EtherCat) and
Class/Instance/Attribute (CompoNet/DeviceNet)
are correct.
Modbus mapping function is set. Set the Modbus mapping function selection (P200)
to “00: standard Modbus address”.
Unable to connect
the CX-Drive. CX-Drive version is incorrect. Prepare Ver. 2.8 if connecting 3G3MX2 series V1
type.
The software number of the inverter is
inconsistent. Match the CX-Drive to the software number of the
inverter to connect to.
The endian function of the Modbus
mapping function is set improperly. Set Modbus mapping endian selection (P400) to
“00: big endian”.
Unable to set the
parameter from
CX-Drive. The inverter is running. Stop the inverter, and reset the settings after the
motor slows down and stops. If set to the mode
where changes are permitted while running (b031 =
10), some of the parameters can be changed while
running.
Modbus mapping function is set. Set the Modbus mapping function selection (P200)
to “00: standard Modbus address”.
Overload
protection (E05)
occurs on brake
control. Inverter is running in brake restrain
state. Release the run command of the inverter in brake
restrain state. Overload protection may occur in DC
breaking.
Brake error (E36)
occurs on brake
control. Brake control release current has not
been reached. Either make the brake control release wait time
(b121) longer, or reduce the brake control release
current (b126).
Brake check signal is not being
inputted. • Correct the wirings of the brake check signal
(44: BOK). If not in use, remove the brake check
signal from the multi function input setting.
• Correct the sequence so that the brake check
signal (44: BOK) is inputted after the brake
release.
• Replace the brake if it is damaged.
Load drops on
brake control. Insufficient brake control release
current. • Raise the brake control release current (b126).
• Set the control method (A044/A244) to “03:
sensor less vector control”.
The frequency to release/restrain the
brake is low. Raise either the brake control release frequency
(b125), brake control restrain frequency (b127) or
the creep speed setting (P015).
PM motor rotates
on startup. The motor magnetic pole position is
incorrect on startup. Set the PM motor start method selection (H123) to
“01: default position estimation enabled”.
Overcurrent
protection (E03)
occurs when
starting with the
PM motor. PM motor is out of step. Raise the PM motor start current (H117).
Adjust according to the “PM motor mode
adjustment”.
Excessive load. Reduce the load. Or make the acceleration time
longer.