Mitsubishi Electric LD77MH, User Manual

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Chapter 2 Input Axis Module
[Md.320] Synchronous encoder axis current value
The current value for the synchronous encoder axis is stored in synchronous encoder axis
position units (Refer to Section 2.2.1).
The synchronous encoder position for an incremental synchronous encoder is "0"
immediately after the power supply ON.
[Md.321] Synchronous encoder axis current value per cycle
The current value per cycle for a synchronous encoder axis is stored in the range from 0 to
("[Pr.324] Synchronous encoder axis length per cycle"-1).
The unit is synchronous encoder axis position units (Refer to Section 2.2.1).
[Md.322] Synchronous encoder axis speed
The speed for a synchronous encoder axis is stored in synchronous encoder axis speed
units (Refer to Section 2.2.1).
If the speed for a synchronous encoder axis exceeds the monitor range (Refer to Section
2.2.1), the warning "Input axis speed display over" (warning code: 682) will occur. In this
case, use a smaller number of decimal places for the speed in "[Pr.321] Synchronous
encoder axis unit setting" or set the speed time units to "0: second [s]".
[Md.323] Synchronous encoder axis phase compensation amount
The phase compensation amount for a synchronous encoder axis is stored in the
synchronous encoder axis position units (Refer to Section 2.2.1).
The phase compensation amount for a synchronous encoder axis is the value after
smoothing processing and phase compensation processing.
[Md.324] Synchronous encoder axis rotation direction restriction amount
While the rotation direction is restricted for a synchronous encoder axis, the accumulation
for input travel in the opposite direction of the enabled direction is stored in synchronous
encoder axis position units (Refer to Section 2.2.1) as follows.
Setting value of "[Pr.328]
Synchronous encoder axis rotation
direction restriction"
Storage details
1: Enable only for current value
increase direction
A negative accumulation is stored during rotation direction restriction.
0 is stored if there is no restriction.
2: Enable only for current value
decrease direction
A positive accumulation is stored during rotation direction restriction.
0 is stored if there is no restriction.
Rotation direction restriction is processed after phase compensation processing.
Therefore, if undershoot occurs from phase compensation during deceleration stop, the
rotation direction restriction amount might remain.