JVL MIS17 Series User Manual page 127

5.8 Absolute Multi-turn Encoder
The battery level can not be measured in the present version of the MIS motors. If the
internal battery is empty no pre-warnings will be given but the error "lost encoder posi-
tion" will be reported in MacTalk and the error register.
5.8.7 Connecting an external power source for the H3/H4 encoder
An external power source such as a battery can also be connected. The illustration below
shows how. See also How to connect a MIS motor, page 37.
The lifetime of the internal battery will not get significant longer when connecting an ex-
ternal battery since a significant part of the lifetime is based on the internal leakage cur-
rent in the battery.
Frequently asked questions
Q1 How can i see the status level of the internal battery ?
A1 Sorry but not possible in the present hardware version
Q2 What happens if the internal battery is empty ?
A2 The absolute position will not be retained but the motor can still function. The error
"
Encoder lost position"
lost
empty an external can be connected and the motor will operate normally again.
Q3 If i connect an external battery - which size must it be ?
A3 The internal battery is 3.0V/255mAh. The external battery is recommended to be
minimum the same size. Do only use batteries with a nominal voltage of 3.0 to 3.3V.
Q4 Can i replace the internal battery ?
A4 No this is not possible. The motor need to be serviced by JVL.
Q5 If the internal battery is empty how long time is the position then kept ?
A5 The position data is not kept if the internal battery is empty.
JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS17x, 23x, 34x, 43x
will however be reported. See also
position', page 172 for details how to reset the error. If the internal battery is
Only MISxxx---H3/H4--
Error message 'Encoder
127