Yaskawa MP930 - Manual (Page 258)

8.2 Battery
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8.2 Battery
The MC Unit has one replaceable built-in battery, which is used to prevent the programs and data
stored in the memory from being lost when a power failure occurs (i.e., when the power supply to
the MC Unit is interrupted).
8.2.1 Battery Life
The built-in battery can retain the contents of the memory until the total time of power interrup-
tions reaches one year. The warrantee period of the battery is five years from the date of pur-
chase. However, these values differ according to the operating conditions, including the ambi-
ent temperature.
If the “BAT” indicator on the MC Unit lights, replace the battery with a replacement battery
(DE9403582-1) within two weeks. Any delay in battery replacement will result in the pro-
grams and data stored in the memory being lost.
8.2.2 Battery Replacement
This section describes how to replace the battery.
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Preparations
1. Saving the Memory Contents
Before replacing the battery, save the programs and data from the memory of the MC Mod-
ule to floppy disks or a hard disk. The saved programs and data will be used if the programs
and data are accidentally deleted during battery replacement.
2. Obtain a Replacement Battery
Obtain a replacement battery (DE9403582-1). This battery is not commercially available,
and must be order from your nearest Yaskawa sales representative. The appearance of the
battery is illustrated below.
Lithium battery
Red lead
Black lead Connector
+ −
Figure 8.1 DE9403582-1 (Battery with Cable)
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