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Mitsubishi Electric QD77MS User Manual Page 66

Simple motion module.
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Restrictions
(1) The servo amplifier axis selected as "Synchronous encoder via servo amplifier" in
"[Pr.320] Synchronous encoder axis type" does not operate in the fully closed control
mode even though "_ _ 1 _" is set in the servo parameter "Operation mode selection
(PA01)".
(2) The information about the synchronous encoder is output to "[Md.112] Optional data
monitor output 4" of the servo amplifier axis selected as "Synchronous encoder via
servo amplifier" in "[Pr.320] Synchronous encoder axis type", and "[Pr.94] Optional
data monitor: Data type setting 4" is ignored.
(Set the total points to be within 3 words for the optional data monitor. Otherwise, the
monitor setting is ignored.)
(3) When the servo alarms about the serial absolute synchronous encoder connection
occur in the servo amplifier axis selected as "Synchronous encoder via servo
amplifier" in "[Pr.320] Synchronous encoder axis type", the status becomes servo
OFF. "AL.25" (Absolute position erased), "AL.70" (Load-side encoder initial
communication error 1), or "AL.71" (Load-side encoder normal communication error
1) occurs in the servo amplifier.
(4) The error "Synchronous encoder via servo amplifier invalid error" (error code: 979)
occurs in the following cases.
• Other than MR-J4 series is set in "[Pr.100] Servo series" of the axis No. selected as
"Synchronous encoder via servo amplifier" in "[Pr.320] Synchronous encoder axis
type".
QD77MS
• The servo amplifier axis which is not set in the system setting is set to the servo
amplifier axis No. to connect to "Synchronous encoder via servo amplifier".
LD77MS
• The servo axis, which "Invalid" is set to from the "External synchronous encoder
input" list of the amplifier setting dialog using the Simple Motion Module Setting Tool,
is set to the servo amplifier axis No. to connect to "Synchronous encoder via servo
amplifier".
QD77MS
• A linear scale is connected.
• The servo amplifier of the axis No. selected as "Synchronous encoder via servo
amplifier" in "[Pr.320] Synchronous encoder axis type" is not set or the servo axis,
which scale measurement mode is not enabled, is set to the servo amplifier axis No.
to connect to "Synchronous encoder via servo amplifier".
QD77MS
LD77MS
LD77MS
LD77MS
2 - 18
Chapter 2 Input Axis Module
[CiA402 mode]
QD77GF
QD77MS

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