Servopack Inspection; Replacing Battery For Absolute Encoder - YASKAWA SGM Series User Manual

12.1.2 SERVOPACK Inspection

The SERVOPACK contains highly reliable parts and does not require daily inspection. Always
inspection the SERVOPACK at least once a year. Be sure to check user settings prior to opera-
tion because we reset user constants to standard settings when we ship overhauled SERVO-
PACKS.
Clean unit interior
and circuit boards
Loose screws
Defective parts in
unit or on circuit
boards
J Guidelines for Replacing Parts
The following parts are subject to mechanical wear or deterioration over time. To avoid failure,
replace these parts at the frequency indicated in the following table.
Smoothing capacitor
Relays
Fuse
Note Operating conditions

12.1.3 Replacing Battery for Absolute Encoder

Replace the absolute encoder battery (purchased by the customer) as outlined below. With an ER
6-V C-type lithium battery manufactured by Toshiba Battery Co., Ltd. the estimated life is about
10 years.
1. Turn ON the control power supply of the SERVOPACK and wait at least 30 minutes after
2. Replace the battery. The SERVOPACK power supply may be ON or OFF when the battery
Encoder multi-turn data will not be lost if the battery is replaced following the instructions given
above. After completing step 1, above, the absolute encoder will function normally for up to 2 days
without a battery.
When replacing the battery with the multi-turn data remaining, leave the encoder power supply for at least 30
IMPORTANT
minutes (SENS_ON command transfer).
Table 12.3 Inspection Items
Item Frequency
At least once a
year
At least once a
year
At least once a
year
Table 12.4 Parts Replacement
Part
Ambient temperature: Annual average of 30°C
Load factor: 80% max.
Operation rate: 20 hours/day max.
Be sure to check user settings prior to operation because Yaskawa resets user
constants to factory settings when shipping overhauled SERVOPACKS.
the SENS_ON command is transmitted until the capacitor inside the encoder is charged.
is replaced.
12 -3
12.1 Servodrive Maintenance and Inspection of Servodrives
Procedure
Check for dust, dirt, and oil on
surfaces.
Check for loose terminal block
and connector screws.
Check for discoloration, damage
or broken wires due to heat.
Standard Replacement
Period
7 to 8 years Test and replace with a new capaci-
tor if necessary.
− Test and replace if necessary.
10 years Replace with a new fuse.
Remedy
Clean with a cloth or
compressed air.
Tighten any loose screws.
Contact your Yaskawa
representative.
Replacement Method
12