YASKAWA SGD7S series User Manual

12.4 Troubleshooting Based on the Operation and Conditions of the Servomotor
12-56
Servomotor
Does Not
Start
Torque control: The torque
reference input is not appro-
priate.
Check between the
torque reference input (T-
REF) and signal ground
(SG) to see if the control
method and the input
agree.
Correctly set the con-
trol method and input
method.
page 9-7
Position control: The refer-
ence pulse input is not
appropriate.
Check the setting of
Pn200 =n.X (Refer-
ence Pulse Form) and the
sign and pulse signals.
Correctly set the con-
trol method and input
method.
page 6-31
The /CLR (Position Deviation
Clear) input signal has not
been turned OFF.
Check the /CLR signal
(CN1-14 and CN1-15).
Turn OFF the /CLR sig-
nal.
page 9-7
The P-OT (Forward Drive
Prohibit) or N-OT (Reverse
Drive Prohibit) signal is still
OFF.
Check the P-OT and N-
OT signals.
Turn ON the P-OT and
N-OT signals.
page 9-7
The safety input signals
(/HWBB1 or /HWBB2) were
not turned ON.
Check the /HWBB1 and
/HWBB2 input signals.
Turn ON the /HWBB1
and /HWBB2 input sig-
nals.
If you are not using the
safety function, con-
nect the Safety Jumper
Connector (provided as
an accessory) to CN8.
page 9-7
The FSTP (Forced Stop
Input) signal is still OFF.
Check the FSTP signal.
• Turn ON the FSTP
signal.
• If you will not use the
function to force the
motor to stop, set
Pn516 = n.X
(FSTP (Forced Stop
Input) Signal Alloca-
tion) to disable the
signal.
page 9-7
A failure occurred in the
SERVOPACK.
–
Replace the SERVO-
PACK.
–
The polarity detection was
not executed.
Check the setting of
Pn080 =n.X (Polar-
ity Sensor Selection).
Correct the parameter
setting.
page 5-26
Check the /S-ON (Servo
ON) or /P-DET (Polarity
Detection) input signal.
• If you are using an
incremental linear
encoder, turn ON the
/S-ON or /P-DET sig-
nal.
• If you are using an
absolute linear
encoder, turn OFF the
external /S-ON signal
and execute polarity
detection.
page 5-27
Continued on next page.
Continued from previous page.
Problem Possible Cause Confirmation Correction Reference

YASKAWA SGD7S series Specifications

General

Series	SGD7S
Safety	STO (Safe Torque Off)
Humidity	90% RH or less (non-condensing)
Control Method	PWM Control
Communication	EtherCAT, MECHATROLINK-III, MECHATROLINK-II
Output Power	0.1 kW to 15 kW
Feedback System	Incremental encoder, Absolute encoder
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overload, Overheating, Encoder Error
Ambient Temperature	0 to 55°C
Storage Temperature	-20 to 85°C
Vibration Resistance	5.9 m/s²
Installation	Panel mounted
Certifications	CE, UL, cUL