Yaskawa MP920 User's Manual Design - Manual (Page 448)

10.1 Structure of the Absolute Position Detection Function
10-3
10
Holding Absolute Data
An absolute encoder uses a battery to maintain absolute data at all times even though power
is turned OFF. It also updates data if there is a change.
The battery is connected to the battery terminal of the SERVOAPACK.
Yaskawa supplies the battery module (JRMSP–120XC9600) on which the following battery
is mounted.
• Type of battery: Lithium
• Battery configuration: ER6VC3, 3.6 V
× 1
• Non-conducting service life: About 1 year
Reading Absolute Data
When power is turned ON, absolute data is read to the SERVOAPACK as well as to the
MP920 where it is used to automatically calculate the absolute position and set the machine
coordinate system. This way the absolute machine position can be detected and automatic
operation can begin immediately after power is turned ON.