Mitsubishi Electric MELSERVO MRJ2S-B, Instruction Manual

Page: 158 / 200

Troubleshooting Alarms and Warnings
9 - 10
9.1.3 Warnings
If E6, E7, E9 or EE occurs, the servo off status is established. If any other warning occurs,
operation can be continued but an alarm may take place or proper operation may not be
performed. Eliminate the cause of the warning according to this section.
Display Name Definition Cause Action
92 Open battery
cable warning Absolute position detection
system battery voltage is
low. 1. Battery cable is open Repair cable or
changed.
2. Battery voltage dropped to
2.8V or less. Change battery
96 Home position
setting warning
Home position return could
not be made in the precise
position. 1. Contouring error is greater
than the setting range of the
“In Position”.
Eliminate the cause of
the contouring error
2. Home position return was
executed during operation
command.
Reduce speed for
home position travel
3. Speed for home position
travel is too high.
9F Battery warning Voltage of battery for
absolute position detection
system reduced. Battery voltage fell to 3.2V or
less. Change the battery
E0 Excessive
regenerative
warning
Pre-warning alarm 30 Regenerative power increased
to 85% or more of permissible
regenerative power of built-in
regenerative brake resistor or
regenerative brake option.
Checking method: Call the
status display and check
regenerative load ratio.
1. Increase the cycle
time
2. Change regenerative
brake option for the one
with larger capacity.
3. Reduce load
E1 Overload warning Pre-warning alarm 50/51 Load increased to 85% or
more of overload alarm 1 or 2
occurrence level. Refer alarm 50/51
E3 Absolute position
counter warning Absolute position encoder
pulses faulty 1. Electromagnetic coupling
entered the encoder. Take electromagnetic
coupling suppression
measures.
2. Encoder faulty Change servo motor
E4 Parameter
warning Parameter outside setting
range Parameter value set from
servo system controller is
outside setting range Set it correctly
E6 Servo forced stop
warning EM1 is off. External forced stop was made
valid. Deactivate external
forced stop
E7 Controller
emergency stop
warning — Emergency stop signal was
entered in to the servo system
controller. Deactivate emergency
stop
E9 Main circuit off
warning Servo-on (SON) was
switched on with main
circuit power off. — Switch on main circuit
power
EE SSCNET error
warning The servo system controller
connected is not
SSCNET-compatible.
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Tab. 9-3: Meanings