Turning Power On/Off - YASKAWA SGM Series User Manual

5.1 Turning Power ON/OFF

The figure below shows a typical example of the power ON/OFF sequence.
1.
Construct a power ON sequence so the power is turned OFF if a servo alarm signal is output. See 5.4.4
IMPORTANT
"Handling Protective Circuit Operation" for more details on handling the alarm signal output.
2. During the power ON and OFF sequence shown in Figure 5.1, it takes up to approx. two seconds until
the normal signal is valid once power is turned ON assuming that the CONNECT command has been
received.
3. It takes up to approx. two seconds to initialize settings in the SERVOPACK when the control power is
turned ON. The servo alarm signal will be output (ON) until the communication connection is completed
for the CONNECT command.
4. The SERVOPACK has a capacitor in the power supply. A high charging current will thus flow for 0.6
seconds when the power is turned ON. Frequently turning the power ON and OFF will cause the main
power devices (such as capacitors and fuses) to deteriorate and can result in unexpected problems. Start
and stop the Servomotor by SV_ON/SV_OFF commands rather than turning the power supply ON and
OFF.
5. After turning the power OFF, do not touch the power terminals for at least five minutes because high volt-
age may remain in the SERVOPACK. Residual voltage still remains in the SERVOPACK even after pow-
er is turned OFF. Make sure the charge lamp is unlit first before starting an inspection.
Three-phase 200 to 230 VAC
50/60 Hz
R S T
1MCCB
FIL
(For servo alarm display)
5Ry
Main circuit
Main circuit power
power supply
supply ON
OFF
1MC 5Ry
Figure 5.1 Example of Power ON/OFF Sequence
5 -3
+10
%
-15
SERVOPACK
SGDB-jjAN
FG
r
t
1MC
R
S
T
ALM
1PL
ALM−SG
FG
1MC
1SUP
1MCCB: Circuit breaker (for the inverter)
FIL: Noise filter
1MG: Contactor
5Ry: Relay
1PL: Patrol lighter
1SUP: Surge suppressor CR505008A (Okaya Electric Industries Co., Ltd.)
1D: Flywheel diode (To prevent spikes in 5Ry)
5.1 Turning Power ON/OFF
A
U
B
V M
C
W
D
PG
1CN
5Ry
3
+ +
24 VDC
− −
4 1D
5