Scale Measurement Function [G] [B]; Outline - Mitsubishi Electric MELSERVO-J5 User Manual

4.3

Scale measurement function [G] [B]

This function is available on servo amplifiers with firmware version A5 or later.
If a linear encoder is used as a scale measurement encoder for this servo amplifier, refer to the following manual.
MR-J5 Partner's Encoder User's Manual
To replace a servo motor with a batteryless absolute position encoder using the absolute position detection
system, set [Pr. PA03.2 Scale measurement encoder replacement preparation]. By setting [Pr. PF63.1 [AL.
1A.6 Servo motor combination error 4] selection] to "1" (disabled) while the absolute position detection system
is enabled at startup, an in-use batteryless absolute position scale measurement encoder can be replaced
without changing the setting value of [Pr. PA03.2].

Outline

The scale measurement function transmits the position information of a scale measurement encoder by connecting the
encoder to the servo amplifier in the state of the semi closed loop control.
If the scale measurement function is used for the MR-J5-_G_, MR-J5W2-_G_, MR-J5D2-_G_, MR-J5-_B_,
and MR-J5W2-_B_, the following restrictions apply. However, these restrictions do not apply to the MR-J5-
_G_-RJ, MR-J5D1-_G_, or MR-J5-_B_-RJ. Note that this function cannot be used on the MR-J5W3-_G_, MR-
J5D3-_G_, or MR-J5W3-_B_. Enabling the scale measurement function on the MR-J5W3-_G_, MR-J5D3-
_G_, or MR-J5W3-_B_ triggers [AL. 037 Parameter error].
• A/B/Z-phase differential output type encoders cannot be used as a scale measurement encoder.
• Only the scale measurement encoders with the two-wire type communication method can be used for this
function. The scale measurement encoders and servo motor encoders with the four-wire type
communication method cannot be used.
The scale measurement function cannot be used in the fully closed loop control mode. Enabling the scale
measurement function in the fully closed loop control mode triggers [AL. 037].
For the MR-J5_-_B_, set "0" (standard control mode) for [Pr. PA01.1 Operation mode selection]. Setting any
other operation mode triggers [AL. 037].
The scale measurement encoders can be used as HK-KT servo motor encoders, HK-MT servo motor
encoders, linear encoders, or A/B/Z-phase differential output type encoders. For scale measurement
encoders that can be used with this servo amplifier, contact your local sales office.
If the network communication cycle is less than 125 μs when the scale measurement function is enabled, [AL.
09E Network warning] occurs.
If the network communication cycle is less than 125 μs when the scale measurement function is enabled on
the MR-J5-_G_ or MR-J5D1-_G_, [AL. 09E] occurs.
If the network communication cycle is less than 250 μs when the scale measurement function is enabled on
the MR-J5W2-_G_ or the MR-J5D2-_G_, [AL. 09E] occurs.
4 APPLICABLE FUNCTIONS
212
4.3 Scale measurement function [G] [B]