Troubleshooting Based On The Operation And Conditions Of The Servomotor - YASKAWA Sigma-7S Series Product Manual

6.2 Troubleshooting Based on the Operation and Conditions of the Servomotor

6.2

Troubleshooting Based on the Operation and Conditions of the Servomotor

This section provides troubleshooting for problems related to the dynamic brake hardware
option specifications based on the operation and conditions of the Servomotor, including
causes and corrections.
Problem
Dynamic Brake
Does Not
Operate
An External
Dynamic Brake
Resistor
Cannot Be
Connected
6-6
Possible Cause
The setting of Pn001 =
n.X (Servo OFF or
Alarm Group 1 Stopping
Method) is not suitable.
Dynamic brake resistor is
disconnected.
The dynamic brake drive
circuit failure.
The external dynamic
brake resistor is not con-
nected properly.
A SERVOPACK to which
an external dynamic
brake resistor cannot be
connected (SGD7S-
R70A to -2R8A or
SGD7W-1R6A to -2R8A)
is in use.
Confirmation
Check the setting of
Pn001 = n.X.
Check the moment of
inertia, motor speed, and
dynamic brake frequency
of use. The dynamic
brake resistor may be
disconnected if there
was excessive moment
of inertia, excessive
motor speed, excessive
use of the dynamic
brake, or if a suitable
external dynamic brake
has not been selected.
–
Check the connection
status.
Check the SERVOPACK
model.
Correction Reference
Set Pn001 = n.X
correctly.
Turn OFF the power sup-
ply to the servo system.
Replace the SERVO-
PACK. To prevent dis-
connection, reduce the
load.
Turn OFF the power sup-
ply to the servo system.
A part in the dynamic
brake circuit has failed.
Replace the SERVO-
PACK. Take measures to
reduce the load in order
to prevent damage to the
dynamic brake drive cir-
cuit.
Turn OFF the power sup-
ply to the servo system.
Connect the selected
dynamic brake resistor
correctly.
Turn OFF the power sup-
ply to the servo system.
Select another SERVO-
PACK.
(Use a SERVOPACK that
accepts an externally
connected dynamic
brake resistor or a stan-
dard SERVOPACK.)
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