NSK EDD Megatorque Motor, User Manual, Page: 388 / 398

Appendix
— A-20 —
Appendix 5: Procedure for Replacing Driver Unit Model EDD

Follow the procedures described in this section when the initialization of the Driver Unit is required during
troubleshooting or replacing the Driver Unit and/or the Motor.
Confirmation of interchangeability

Reference number coding of the Driver Unit Model EDD shown below indicates that the Driver Unit is
interchangeable with other Driver Units Model EDD.
Fig A-19: Indication of interchangeability of the Driver Units Model EDD
M-EDD
– PS1006 A B 5 01 – 03
Position sencor code B: Interchangeable Driver Unit

The Driver Units Model EDD are interchangeable with each other. Replace a Driver Unit with the one that
has the same reference number, and then restore the settings of the parameters, the internal channel
programs and the control inputs and outputs, that have been copied from the old one.
Preparation

Handy Terminal FHT31, FHT21 or FHT11
Back up the settings of the Driver Unit
1)
Refer to “Appendix 3: How to Back up and Restore the Settings of Programs and Parameters” for backing
up the whole settings of the Driver Unit to be replaced.
2) Replace the Driver Unit.
Initialization of the Driver Unit

All parameters have been initialized when it is shipped from the plant. If your Driver Unit is a new one, the
initialization is not necessary.
1) Turn on only the control power of the Driver Unit.
(1) Turn off the main power supplied to the Driver Unit.
(2) Input the command MO (Servo off).
: MO
:_
O M
ENT
This will prohibit the Driver Unit from activating the Motor servo even the main power is
turned on and the input SVON (Servo on) is activated.